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moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/server/router/volume/volume_routes.go | package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"net/http"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
vol, err := v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
if err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force)); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"fmt"
"net/http"
"strconv"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// clusterVolumesVersion defines the API version that swarm cluster volume
// functionality was introduced. avoids the use of magic numbers.
clusterVolumesVersion = "1.42"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
if versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
clusterVolumes, swarmErr := v.cluster.GetVolumes(volume.ListOptions{Filters: filters})
if swarmErr != nil {
// if there is a swarm error, we may not want to error out right
// away. the local list probably worked. instead, let's do what we
// do if there's a bad driver while trying to list: add the error
// to the warnings. don't do this if swarm is not initialized.
warnings = append(warnings, swarmErr.Error())
}
// add the cluster volumes to the return
volumes = append(volumes, clusterVolumes...)
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
// re: volume name duplication
//
// we prefer to get volumes locally before attempting to get them from the
// cluster. Local volumes can only be looked up by name, but cluster
// volumes can also be looked up by ID.
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
// if the volume is not found in the regular volume backend, and the client
// is using an API version greater than 1.42 (when cluster volumes were
// introduced), then check if Swarm has the volume.
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
swarmVol, err := v.cluster.GetVolume(vars["name"])
// if swarm returns an error and that error indicates that swarm is not
// initialized, return original NotFound error. Otherwise, we'd return
// a weird swarm unavailable error on non-swarm engines.
if err != nil {
return err
}
vol = &swarmVol
} else if err != nil {
// otherwise, if this isn't NotFound, or this isn't a high enough version,
// just return the error by itself.
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
var (
vol *volume.Volume
err error
version = httputils.VersionFromContext(ctx)
)
// if the ClusterVolumeSpec is filled in, then this is a cluster volume
// and is created through the swarm cluster volume backend.
//
// re: volume name duplication
//
// As it happens, there is no good way to prevent duplication of a volume
// name between local and cluster volumes. This is because Swarm volumes
// can be created from any manager node, bypassing most of the protections
// we could put into the engine side.
//
// Instead, we will allow creating a volume with a duplicate name, which
// should not break anything.
if req.ClusterVolumeSpec != nil && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) {
logrus.Debug("using cluster volume")
vol, err = v.cluster.CreateVolume(req)
} else {
logrus.Debug("using regular volume")
vol, err = v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
}
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) putVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm is unavailable"))
}
if err := httputils.ParseForm(r); err != nil {
return err
}
rawVersion := r.URL.Query().Get("version")
version, err := strconv.ParseUint(rawVersion, 10, 64)
if err != nil {
err = fmt.Errorf("invalid swarm object version '%s': %v", rawVersion, err)
return errdefs.InvalidParameter(err)
}
var req volume.UpdateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
return v.cluster.UpdateVolume(vars["name"], version, req)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
version := httputils.VersionFromContext(ctx)
err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force))
if err != nil {
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
err := v.cluster.RemoveVolume(vars["name"], force)
if err != nil {
return err
}
} else {
return err
}
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | Same here;
```suggestion
if err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force)); err != nil {
if !errdefs.IsNotFound(err) {
return err
}
if versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
err = v.cluster.RemoveVolume(vars["name"], force)
}
if err != nil {
return err
}
}
``` | thaJeztah | 4,998 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/server/router/volume/volume_routes.go | package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"net/http"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
vol, err := v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
if err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force)); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"fmt"
"net/http"
"strconv"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// clusterVolumesVersion defines the API version that swarm cluster volume
// functionality was introduced. avoids the use of magic numbers.
clusterVolumesVersion = "1.42"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
if versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
clusterVolumes, swarmErr := v.cluster.GetVolumes(volume.ListOptions{Filters: filters})
if swarmErr != nil {
// if there is a swarm error, we may not want to error out right
// away. the local list probably worked. instead, let's do what we
// do if there's a bad driver while trying to list: add the error
// to the warnings. don't do this if swarm is not initialized.
warnings = append(warnings, swarmErr.Error())
}
// add the cluster volumes to the return
volumes = append(volumes, clusterVolumes...)
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
// re: volume name duplication
//
// we prefer to get volumes locally before attempting to get them from the
// cluster. Local volumes can only be looked up by name, but cluster
// volumes can also be looked up by ID.
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
// if the volume is not found in the regular volume backend, and the client
// is using an API version greater than 1.42 (when cluster volumes were
// introduced), then check if Swarm has the volume.
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
swarmVol, err := v.cluster.GetVolume(vars["name"])
// if swarm returns an error and that error indicates that swarm is not
// initialized, return original NotFound error. Otherwise, we'd return
// a weird swarm unavailable error on non-swarm engines.
if err != nil {
return err
}
vol = &swarmVol
} else if err != nil {
// otherwise, if this isn't NotFound, or this isn't a high enough version,
// just return the error by itself.
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
var (
vol *volume.Volume
err error
version = httputils.VersionFromContext(ctx)
)
// if the ClusterVolumeSpec is filled in, then this is a cluster volume
// and is created through the swarm cluster volume backend.
//
// re: volume name duplication
//
// As it happens, there is no good way to prevent duplication of a volume
// name between local and cluster volumes. This is because Swarm volumes
// can be created from any manager node, bypassing most of the protections
// we could put into the engine side.
//
// Instead, we will allow creating a volume with a duplicate name, which
// should not break anything.
if req.ClusterVolumeSpec != nil && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) {
logrus.Debug("using cluster volume")
vol, err = v.cluster.CreateVolume(req)
} else {
logrus.Debug("using regular volume")
vol, err = v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
}
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) putVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm is unavailable"))
}
if err := httputils.ParseForm(r); err != nil {
return err
}
rawVersion := r.URL.Query().Get("version")
version, err := strconv.ParseUint(rawVersion, 10, 64)
if err != nil {
err = fmt.Errorf("invalid swarm object version '%s': %v", rawVersion, err)
return errdefs.InvalidParameter(err)
}
var req volume.UpdateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
return v.cluster.UpdateVolume(vars["name"], version, req)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
version := httputils.VersionFromContext(ctx)
err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force))
if err != nil {
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
err := v.cluster.RemoveVolume(vars["name"], force)
if err != nil {
return err
}
} else {
return err
}
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | Same here; we could use an early return (perhaps we should use the generic error though (see [`func (c *Cluster) errNoManager(st nodeState) error {`](https://github.com/moby/moby/blob/647aede6ad42d0f4cf08d675f59bb8013a3fb56b/daemon/cluster/cluster.go#L352-L354));
```suggestion
func (v *volumeRouter) postVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm unavailable"))
}
```
```go
func (v *volumeRouter) postVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm unavailable"))
}
if err := httputils.ParseForm(r); err != nil {
return err
}
if err := httputils.CheckForJSON(r); err != nil {
return err
}
rawVersion := r.URL.Query().Get("version")
version, err := strconv.ParseUint(rawVersion, 10, 64)
if err != nil {
err = fmt.Errorf("invalid swarm object version '%s': %v", rawVersion, err)
return errdefs.InvalidParameter(err)
}
var req volume.VolumeUpdateBody
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
return v.cluster.UpdateVolume(vars["name"], version, req)
}
``` | thaJeztah | 4,999 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/server/router/volume/volume_routes.go | package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"net/http"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
vol, err := v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
if err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force)); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"fmt"
"net/http"
"strconv"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// clusterVolumesVersion defines the API version that swarm cluster volume
// functionality was introduced. avoids the use of magic numbers.
clusterVolumesVersion = "1.42"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
if versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
clusterVolumes, swarmErr := v.cluster.GetVolumes(volume.ListOptions{Filters: filters})
if swarmErr != nil {
// if there is a swarm error, we may not want to error out right
// away. the local list probably worked. instead, let's do what we
// do if there's a bad driver while trying to list: add the error
// to the warnings. don't do this if swarm is not initialized.
warnings = append(warnings, swarmErr.Error())
}
// add the cluster volumes to the return
volumes = append(volumes, clusterVolumes...)
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
// re: volume name duplication
//
// we prefer to get volumes locally before attempting to get them from the
// cluster. Local volumes can only be looked up by name, but cluster
// volumes can also be looked up by ID.
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
// if the volume is not found in the regular volume backend, and the client
// is using an API version greater than 1.42 (when cluster volumes were
// introduced), then check if Swarm has the volume.
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
swarmVol, err := v.cluster.GetVolume(vars["name"])
// if swarm returns an error and that error indicates that swarm is not
// initialized, return original NotFound error. Otherwise, we'd return
// a weird swarm unavailable error on non-swarm engines.
if err != nil {
return err
}
vol = &swarmVol
} else if err != nil {
// otherwise, if this isn't NotFound, or this isn't a high enough version,
// just return the error by itself.
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
var (
vol *volume.Volume
err error
version = httputils.VersionFromContext(ctx)
)
// if the ClusterVolumeSpec is filled in, then this is a cluster volume
// and is created through the swarm cluster volume backend.
//
// re: volume name duplication
//
// As it happens, there is no good way to prevent duplication of a volume
// name between local and cluster volumes. This is because Swarm volumes
// can be created from any manager node, bypassing most of the protections
// we could put into the engine side.
//
// Instead, we will allow creating a volume with a duplicate name, which
// should not break anything.
if req.ClusterVolumeSpec != nil && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) {
logrus.Debug("using cluster volume")
vol, err = v.cluster.CreateVolume(req)
} else {
logrus.Debug("using regular volume")
vol, err = v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
}
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) putVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm is unavailable"))
}
if err := httputils.ParseForm(r); err != nil {
return err
}
rawVersion := r.URL.Query().Get("version")
version, err := strconv.ParseUint(rawVersion, 10, 64)
if err != nil {
err = fmt.Errorf("invalid swarm object version '%s': %v", rawVersion, err)
return errdefs.InvalidParameter(err)
}
var req volume.UpdateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
return v.cluster.UpdateVolume(vars["name"], version, req)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
version := httputils.VersionFromContext(ctx)
err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force))
if err != nil {
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
err := v.cluster.RemoveVolume(vars["name"], force)
if err != nil {
return err
}
} else {
return err
}
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | can you rename this variable to `vol` so that it doesn't collide with the imported `volume` package? | thaJeztah | 5,000 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/server/router/volume/volume_routes.go | package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"net/http"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
vol, err := v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
if err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force)); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"fmt"
"net/http"
"strconv"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// clusterVolumesVersion defines the API version that swarm cluster volume
// functionality was introduced. avoids the use of magic numbers.
clusterVolumesVersion = "1.42"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
if versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
clusterVolumes, swarmErr := v.cluster.GetVolumes(volume.ListOptions{Filters: filters})
if swarmErr != nil {
// if there is a swarm error, we may not want to error out right
// away. the local list probably worked. instead, let's do what we
// do if there's a bad driver while trying to list: add the error
// to the warnings. don't do this if swarm is not initialized.
warnings = append(warnings, swarmErr.Error())
}
// add the cluster volumes to the return
volumes = append(volumes, clusterVolumes...)
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
// re: volume name duplication
//
// we prefer to get volumes locally before attempting to get them from the
// cluster. Local volumes can only be looked up by name, but cluster
// volumes can also be looked up by ID.
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
// if the volume is not found in the regular volume backend, and the client
// is using an API version greater than 1.42 (when cluster volumes were
// introduced), then check if Swarm has the volume.
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
swarmVol, err := v.cluster.GetVolume(vars["name"])
// if swarm returns an error and that error indicates that swarm is not
// initialized, return original NotFound error. Otherwise, we'd return
// a weird swarm unavailable error on non-swarm engines.
if err != nil {
return err
}
vol = &swarmVol
} else if err != nil {
// otherwise, if this isn't NotFound, or this isn't a high enough version,
// just return the error by itself.
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
var (
vol *volume.Volume
err error
version = httputils.VersionFromContext(ctx)
)
// if the ClusterVolumeSpec is filled in, then this is a cluster volume
// and is created through the swarm cluster volume backend.
//
// re: volume name duplication
//
// As it happens, there is no good way to prevent duplication of a volume
// name between local and cluster volumes. This is because Swarm volumes
// can be created from any manager node, bypassing most of the protections
// we could put into the engine side.
//
// Instead, we will allow creating a volume with a duplicate name, which
// should not break anything.
if req.ClusterVolumeSpec != nil && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) {
logrus.Debug("using cluster volume")
vol, err = v.cluster.CreateVolume(req)
} else {
logrus.Debug("using regular volume")
vol, err = v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
}
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) putVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm is unavailable"))
}
if err := httputils.ParseForm(r); err != nil {
return err
}
rawVersion := r.URL.Query().Get("version")
version, err := strconv.ParseUint(rawVersion, 10, 64)
if err != nil {
err = fmt.Errorf("invalid swarm object version '%s': %v", rawVersion, err)
return errdefs.InvalidParameter(err)
}
var req volume.UpdateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
return v.cluster.UpdateVolume(vars["name"], version, req)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
version := httputils.VersionFromContext(ctx)
err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force))
if err != nil {
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
err := v.cluster.RemoveVolume(vars["name"], force)
if err != nil {
return err
}
} else {
return err
}
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | I was eyeing this `const` for a bit (was wondering if just putting `1.42` inline everywhere would be equally descriptive without having to look up the value of the `const`, but it's used in quite some places, so I guess it makes sense to have a const for this. | thaJeztah | 5,001 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/server/router/volume/volume_routes.go | package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"net/http"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
vol, err := v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
if err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force)); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"fmt"
"net/http"
"strconv"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// clusterVolumesVersion defines the API version that swarm cluster volume
// functionality was introduced. avoids the use of magic numbers.
clusterVolumesVersion = "1.42"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
if versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
clusterVolumes, swarmErr := v.cluster.GetVolumes(volume.ListOptions{Filters: filters})
if swarmErr != nil {
// if there is a swarm error, we may not want to error out right
// away. the local list probably worked. instead, let's do what we
// do if there's a bad driver while trying to list: add the error
// to the warnings. don't do this if swarm is not initialized.
warnings = append(warnings, swarmErr.Error())
}
// add the cluster volumes to the return
volumes = append(volumes, clusterVolumes...)
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
// re: volume name duplication
//
// we prefer to get volumes locally before attempting to get them from the
// cluster. Local volumes can only be looked up by name, but cluster
// volumes can also be looked up by ID.
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
// if the volume is not found in the regular volume backend, and the client
// is using an API version greater than 1.42 (when cluster volumes were
// introduced), then check if Swarm has the volume.
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
swarmVol, err := v.cluster.GetVolume(vars["name"])
// if swarm returns an error and that error indicates that swarm is not
// initialized, return original NotFound error. Otherwise, we'd return
// a weird swarm unavailable error on non-swarm engines.
if err != nil {
return err
}
vol = &swarmVol
} else if err != nil {
// otherwise, if this isn't NotFound, or this isn't a high enough version,
// just return the error by itself.
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
var (
vol *volume.Volume
err error
version = httputils.VersionFromContext(ctx)
)
// if the ClusterVolumeSpec is filled in, then this is a cluster volume
// and is created through the swarm cluster volume backend.
//
// re: volume name duplication
//
// As it happens, there is no good way to prevent duplication of a volume
// name between local and cluster volumes. This is because Swarm volumes
// can be created from any manager node, bypassing most of the protections
// we could put into the engine side.
//
// Instead, we will allow creating a volume with a duplicate name, which
// should not break anything.
if req.ClusterVolumeSpec != nil && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) {
logrus.Debug("using cluster volume")
vol, err = v.cluster.CreateVolume(req)
} else {
logrus.Debug("using regular volume")
vol, err = v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
}
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) putVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm is unavailable"))
}
if err := httputils.ParseForm(r); err != nil {
return err
}
rawVersion := r.URL.Query().Get("version")
version, err := strconv.ParseUint(rawVersion, 10, 64)
if err != nil {
err = fmt.Errorf("invalid swarm object version '%s': %v", rawVersion, err)
return errdefs.InvalidParameter(err)
}
var req volume.UpdateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
return v.cluster.UpdateVolume(vars["name"], version, req)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
version := httputils.VersionFromContext(ctx)
err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force))
if err != nil {
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
err := v.cluster.RemoveVolume(vars["name"], force)
if err != nil {
return err
}
} else {
return err
}
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | Oh! Just realised that I included this check in `httputils.ReadJSON()`; https://github.com/moby/moby/blob/bca8d9f2ce0d63e1490692917cde6273bc288bad/api/server/httputils/httputils.go#L60-L63
So we can remove it here (perhaps also move the `version` variable to the `var()` block below, as it's not used until later)
```suggestion
version := httputils.VersionFromContext(ctx)
``` | thaJeztah | 5,002 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/server/router/volume/volume_routes.go | package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"net/http"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
vol, err := v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
if err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force)); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| package volume // import "github.com/docker/docker/api/server/router/volume"
import (
"context"
"fmt"
"net/http"
"strconv"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/api/types/volume"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/volume/service/opts"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
// clusterVolumesVersion defines the API version that swarm cluster volume
// functionality was introduced. avoids the use of magic numbers.
clusterVolumesVersion = "1.42"
)
func (v *volumeRouter) getVolumesList(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
filters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return errors.Wrap(err, "error reading volume filters")
}
volumes, warnings, err := v.backend.List(ctx, filters)
if err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
if versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
clusterVolumes, swarmErr := v.cluster.GetVolumes(volume.ListOptions{Filters: filters})
if swarmErr != nil {
// if there is a swarm error, we may not want to error out right
// away. the local list probably worked. instead, let's do what we
// do if there's a bad driver while trying to list: add the error
// to the warnings. don't do this if swarm is not initialized.
warnings = append(warnings, swarmErr.Error())
}
// add the cluster volumes to the return
volumes = append(volumes, clusterVolumes...)
}
return httputils.WriteJSON(w, http.StatusOK, &volume.ListResponse{Volumes: volumes, Warnings: warnings})
}
func (v *volumeRouter) getVolumeByName(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
// re: volume name duplication
//
// we prefer to get volumes locally before attempting to get them from the
// cluster. Local volumes can only be looked up by name, but cluster
// volumes can also be looked up by ID.
vol, err := v.backend.Get(ctx, vars["name"], opts.WithGetResolveStatus)
// if the volume is not found in the regular volume backend, and the client
// is using an API version greater than 1.42 (when cluster volumes were
// introduced), then check if Swarm has the volume.
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
swarmVol, err := v.cluster.GetVolume(vars["name"])
// if swarm returns an error and that error indicates that swarm is not
// initialized, return original NotFound error. Otherwise, we'd return
// a weird swarm unavailable error on non-swarm engines.
if err != nil {
return err
}
vol = &swarmVol
} else if err != nil {
// otherwise, if this isn't NotFound, or this isn't a high enough version,
// just return the error by itself.
return err
}
return httputils.WriteJSON(w, http.StatusOK, vol)
}
func (v *volumeRouter) postVolumesCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
var req volume.CreateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
var (
vol *volume.Volume
err error
version = httputils.VersionFromContext(ctx)
)
// if the ClusterVolumeSpec is filled in, then this is a cluster volume
// and is created through the swarm cluster volume backend.
//
// re: volume name duplication
//
// As it happens, there is no good way to prevent duplication of a volume
// name between local and cluster volumes. This is because Swarm volumes
// can be created from any manager node, bypassing most of the protections
// we could put into the engine side.
//
// Instead, we will allow creating a volume with a duplicate name, which
// should not break anything.
if req.ClusterVolumeSpec != nil && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) {
logrus.Debug("using cluster volume")
vol, err = v.cluster.CreateVolume(req)
} else {
logrus.Debug("using regular volume")
vol, err = v.backend.Create(ctx, req.Name, req.Driver, opts.WithCreateOptions(req.DriverOpts), opts.WithCreateLabels(req.Labels))
}
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, vol)
}
func (v *volumeRouter) putVolumesUpdate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if !v.cluster.IsManager() {
return errdefs.Unavailable(errors.New("volume update only valid for cluster volumes, but swarm is unavailable"))
}
if err := httputils.ParseForm(r); err != nil {
return err
}
rawVersion := r.URL.Query().Get("version")
version, err := strconv.ParseUint(rawVersion, 10, 64)
if err != nil {
err = fmt.Errorf("invalid swarm object version '%s': %v", rawVersion, err)
return errdefs.InvalidParameter(err)
}
var req volume.UpdateOptions
if err := httputils.ReadJSON(r, &req); err != nil {
return err
}
return v.cluster.UpdateVolume(vars["name"], version, req)
}
func (v *volumeRouter) deleteVolumes(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
force := httputils.BoolValue(r, "force")
version := httputils.VersionFromContext(ctx)
err := v.backend.Remove(ctx, vars["name"], opts.WithPurgeOnError(force))
if err != nil {
if errdefs.IsNotFound(err) && versions.GreaterThanOrEqualTo(version, clusterVolumesVersion) && v.cluster.IsManager() {
err := v.cluster.RemoveVolume(vars["name"], force)
if err != nil {
return err
}
} else {
return err
}
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func (v *volumeRouter) postVolumesPrune(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
pruneFilters, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
pruneReport, err := v.backend.Prune(ctx, pruneFilters)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, pruneReport)
}
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | See my other comment; `ReadJSON` is called below, so this one is redundant now 😅
```suggestion
``` | thaJeztah | 5,003 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/swagger.yaml | # A Swagger 2.0 (a.k.a. OpenAPI) definition of the Engine API.
#
# This is used for generating API documentation and the types used by the
# client/server. See api/README.md for more information.
#
# Some style notes:
# - This file is used by ReDoc, which allows GitHub Flavored Markdown in
# descriptions.
# - There is no maximum line length, for ease of editing and pretty diffs.
# - operationIds are in the format "NounVerb", with a singular noun.
swagger: "2.0"
schemes:
- "http"
- "https"
produces:
- "application/json"
- "text/plain"
consumes:
- "application/json"
- "text/plain"
basePath: "/v1.42"
info:
title: "Docker Engine API"
version: "1.42"
x-logo:
url: "https://docs.docker.com/images/logo-docker-main.png"
description: |
The Engine API is an HTTP API served by Docker Engine. It is the API the
Docker client uses to communicate with the Engine, so everything the Docker
client can do can be done with the API.
Most of the client's commands map directly to API endpoints (e.g. `docker ps`
is `GET /containers/json`). The notable exception is running containers,
which consists of several API calls.
# Errors
The API uses standard HTTP status codes to indicate the success or failure
of the API call. The body of the response will be JSON in the following
format:
```
{
"message": "page not found"
}
```
# Versioning
The API is usually changed in each release, so API calls are versioned to
ensure that clients don't break. To lock to a specific version of the API,
you prefix the URL with its version, for example, call `/v1.30/info` to use
the v1.30 version of the `/info` endpoint. If the API version specified in
the URL is not supported by the daemon, a HTTP `400 Bad Request` error message
is returned.
If you omit the version-prefix, the current version of the API (v1.42) is used.
For example, calling `/info` is the same as calling `/v1.42/info`. Using the
API without a version-prefix is deprecated and will be removed in a future release.
Engine releases in the near future should support this version of the API,
so your client will continue to work even if it is talking to a newer Engine.
The API uses an open schema model, which means server may add extra properties
to responses. Likewise, the server will ignore any extra query parameters and
request body properties. When you write clients, you need to ignore additional
properties in responses to ensure they do not break when talking to newer
daemons.
# Authentication
Authentication for registries is handled client side. The client has to send
authentication details to various endpoints that need to communicate with
registries, such as `POST /images/(name)/push`. These are sent as
`X-Registry-Auth` header as a [base64url encoded](https://tools.ietf.org/html/rfc4648#section-5)
(JSON) string with the following structure:
```
{
"username": "string",
"password": "string",
"email": "string",
"serveraddress": "string"
}
```
The `serveraddress` is a domain/IP without a protocol. Throughout this
structure, double quotes are required.
If you have already got an identity token from the [`/auth` endpoint](#operation/SystemAuth),
you can just pass this instead of credentials:
```
{
"identitytoken": "9cbaf023786cd7..."
}
```
# The tags on paths define the menu sections in the ReDoc documentation, so
# the usage of tags must make sense for that:
# - They should be singular, not plural.
# - There should not be too many tags, or the menu becomes unwieldy. For
# example, it is preferable to add a path to the "System" tag instead of
# creating a tag with a single path in it.
# - The order of tags in this list defines the order in the menu.
tags:
# Primary objects
- name: "Container"
x-displayName: "Containers"
description: |
Create and manage containers.
- name: "Image"
x-displayName: "Images"
- name: "Network"
x-displayName: "Networks"
description: |
Networks are user-defined networks that containers can be attached to.
See the [networking documentation](https://docs.docker.com/network/)
for more information.
- name: "Volume"
x-displayName: "Volumes"
description: |
Create and manage persistent storage that can be attached to containers.
- name: "Exec"
x-displayName: "Exec"
description: |
Run new commands inside running containers. Refer to the
[command-line reference](https://docs.docker.com/engine/reference/commandline/exec/)
for more information.
To exec a command in a container, you first need to create an exec instance,
then start it. These two API endpoints are wrapped up in a single command-line
command, `docker exec`.
# Swarm things
- name: "Swarm"
x-displayName: "Swarm"
description: |
Engines can be clustered together in a swarm. Refer to the
[swarm mode documentation](https://docs.docker.com/engine/swarm/)
for more information.
- name: "Node"
x-displayName: "Nodes"
description: |
Nodes are instances of the Engine participating in a swarm. Swarm mode
must be enabled for these endpoints to work.
- name: "Service"
x-displayName: "Services"
description: |
Services are the definitions of tasks to run on a swarm. Swarm mode must
be enabled for these endpoints to work.
- name: "Task"
x-displayName: "Tasks"
description: |
A task is a container running on a swarm. It is the atomic scheduling unit
of swarm. Swarm mode must be enabled for these endpoints to work.
- name: "Secret"
x-displayName: "Secrets"
description: |
Secrets are sensitive data that can be used by services. Swarm mode must
be enabled for these endpoints to work.
- name: "Config"
x-displayName: "Configs"
description: |
Configs are application configurations that can be used by services. Swarm
mode must be enabled for these endpoints to work.
# System things
- name: "Plugin"
x-displayName: "Plugins"
- name: "System"
x-displayName: "System"
definitions:
Port:
type: "object"
description: "An open port on a container"
required: [PrivatePort, Type]
properties:
IP:
type: "string"
format: "ip-address"
description: "Host IP address that the container's port is mapped to"
PrivatePort:
type: "integer"
format: "uint16"
x-nullable: false
description: "Port on the container"
PublicPort:
type: "integer"
format: "uint16"
description: "Port exposed on the host"
Type:
type: "string"
x-nullable: false
enum: ["tcp", "udp", "sctp"]
example:
PrivatePort: 8080
PublicPort: 80
Type: "tcp"
MountPoint:
type: "object"
description: |
MountPoint represents a mount point configuration inside the container.
This is used for reporting the mountpoints in use by a container.
properties:
Type:
description: |
The mount type:
- `bind` a mount of a file or directory from the host into the container.
- `volume` a docker volume with the given `Name`.
- `tmpfs` a `tmpfs`.
- `npipe` a named pipe from the host into the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
example: "volume"
Name:
description: |
Name is the name reference to the underlying data defined by `Source`
e.g., the volume name.
type: "string"
example: "myvolume"
Source:
description: |
Source location of the mount.
For volumes, this contains the storage location of the volume (within
`/var/lib/docker/volumes/`). For bind-mounts, and `npipe`, this contains
the source (host) part of the bind-mount. For `tmpfs` mount points, this
field is empty.
type: "string"
example: "/var/lib/docker/volumes/myvolume/_data"
Destination:
description: |
Destination is the path relative to the container root (`/`) where
the `Source` is mounted inside the container.
type: "string"
example: "/usr/share/nginx/html/"
Driver:
description: |
Driver is the volume driver used to create the volume (if it is a volume).
type: "string"
example: "local"
Mode:
description: |
Mode is a comma separated list of options supplied by the user when
creating the bind/volume mount.
The default is platform-specific (`"z"` on Linux, empty on Windows).
type: "string"
example: "z"
RW:
description: |
Whether the mount is mounted writable (read-write).
type: "boolean"
example: true
Propagation:
description: |
Propagation describes how mounts are propagated from the host into the
mount point, and vice-versa. Refer to the [Linux kernel documentation](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt)
for details. This field is not used on Windows.
type: "string"
example: ""
DeviceMapping:
type: "object"
description: "A device mapping between the host and container"
properties:
PathOnHost:
type: "string"
PathInContainer:
type: "string"
CgroupPermissions:
type: "string"
example:
PathOnHost: "/dev/deviceName"
PathInContainer: "/dev/deviceName"
CgroupPermissions: "mrw"
DeviceRequest:
type: "object"
description: "A request for devices to be sent to device drivers"
properties:
Driver:
type: "string"
example: "nvidia"
Count:
type: "integer"
example: -1
DeviceIDs:
type: "array"
items:
type: "string"
example:
- "0"
- "1"
- "GPU-fef8089b-4820-abfc-e83e-94318197576e"
Capabilities:
description: |
A list of capabilities; an OR list of AND lists of capabilities.
type: "array"
items:
type: "array"
items:
type: "string"
example:
# gpu AND nvidia AND compute
- ["gpu", "nvidia", "compute"]
Options:
description: |
Driver-specific options, specified as a key/value pairs. These options
are passed directly to the driver.
type: "object"
additionalProperties:
type: "string"
ThrottleDevice:
type: "object"
properties:
Path:
description: "Device path"
type: "string"
Rate:
description: "Rate"
type: "integer"
format: "int64"
minimum: 0
Mount:
type: "object"
properties:
Target:
description: "Container path."
type: "string"
Source:
description: "Mount source (e.g. a volume name, a host path)."
type: "string"
Type:
description: |
The mount type. Available types:
- `bind` Mounts a file or directory from the host into the container. Must exist prior to creating the container.
- `volume` Creates a volume with the given name and options (or uses a pre-existing volume with the same name and options). These are **not** removed when the container is removed.
- `tmpfs` Create a tmpfs with the given options. The mount source cannot be specified for tmpfs.
- `npipe` Mounts a named pipe from the host into the container. Must exist prior to creating the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
ReadOnly:
description: "Whether the mount should be read-only."
type: "boolean"
Consistency:
description: "The consistency requirement for the mount: `default`, `consistent`, `cached`, or `delegated`."
type: "string"
BindOptions:
description: "Optional configuration for the `bind` type."
type: "object"
properties:
Propagation:
description: "A propagation mode with the value `[r]private`, `[r]shared`, or `[r]slave`."
type: "string"
enum:
- "private"
- "rprivate"
- "shared"
- "rshared"
- "slave"
- "rslave"
NonRecursive:
description: "Disable recursive bind mount."
type: "boolean"
default: false
VolumeOptions:
description: "Optional configuration for the `volume` type."
type: "object"
properties:
NoCopy:
description: "Populate volume with data from the target."
type: "boolean"
default: false
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
DriverConfig:
description: "Map of driver specific options"
type: "object"
properties:
Name:
description: "Name of the driver to use to create the volume."
type: "string"
Options:
description: "key/value map of driver specific options."
type: "object"
additionalProperties:
type: "string"
TmpfsOptions:
description: "Optional configuration for the `tmpfs` type."
type: "object"
properties:
SizeBytes:
description: "The size for the tmpfs mount in bytes."
type: "integer"
format: "int64"
Mode:
description: "The permission mode for the tmpfs mount in an integer."
type: "integer"
RestartPolicy:
description: |
The behavior to apply when the container exits. The default is not to
restart.
An ever increasing delay (double the previous delay, starting at 100ms) is
added before each restart to prevent flooding the server.
type: "object"
properties:
Name:
type: "string"
description: |
- Empty string means not to restart
- `no` Do not automatically restart
- `always` Always restart
- `unless-stopped` Restart always except when the user has manually stopped the container
- `on-failure` Restart only when the container exit code is non-zero
enum:
- ""
- "no"
- "always"
- "unless-stopped"
- "on-failure"
MaximumRetryCount:
type: "integer"
description: |
If `on-failure` is used, the number of times to retry before giving up.
Resources:
description: "A container's resources (cgroups config, ulimits, etc)"
type: "object"
properties:
# Applicable to all platforms
CpuShares:
description: |
An integer value representing this container's relative CPU weight
versus other containers.
type: "integer"
Memory:
description: "Memory limit in bytes."
type: "integer"
format: "int64"
default: 0
# Applicable to UNIX platforms
CgroupParent:
description: |
Path to `cgroups` under which the container's `cgroup` is created. If
the path is not absolute, the path is considered to be relative to the
`cgroups` path of the init process. Cgroups are created if they do not
already exist.
type: "string"
BlkioWeight:
description: "Block IO weight (relative weight)."
type: "integer"
minimum: 0
maximum: 1000
BlkioWeightDevice:
description: |
Block IO weight (relative device weight) in the form:
```
[{"Path": "device_path", "Weight": weight}]
```
type: "array"
items:
type: "object"
properties:
Path:
type: "string"
Weight:
type: "integer"
minimum: 0
BlkioDeviceReadBps:
description: |
Limit read rate (bytes per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteBps:
description: |
Limit write rate (bytes per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceReadIOps:
description: |
Limit read rate (IO per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteIOps:
description: |
Limit write rate (IO per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
CpuPeriod:
description: "The length of a CPU period in microseconds."
type: "integer"
format: "int64"
CpuQuota:
description: |
Microseconds of CPU time that the container can get in a CPU period.
type: "integer"
format: "int64"
CpuRealtimePeriod:
description: |
The length of a CPU real-time period in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpuRealtimeRuntime:
description: |
The length of a CPU real-time runtime in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpusetCpus:
description: |
CPUs in which to allow execution (e.g., `0-3`, `0,1`).
type: "string"
example: "0-3"
CpusetMems:
description: |
Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only
effective on NUMA systems.
type: "string"
Devices:
description: "A list of devices to add to the container."
type: "array"
items:
$ref: "#/definitions/DeviceMapping"
DeviceCgroupRules:
description: "a list of cgroup rules to apply to the container"
type: "array"
items:
type: "string"
example: "c 13:* rwm"
DeviceRequests:
description: |
A list of requests for devices to be sent to device drivers.
type: "array"
items:
$ref: "#/definitions/DeviceRequest"
KernelMemoryTCP:
description: |
Hard limit for kernel TCP buffer memory (in bytes). Depending on the
OCI runtime in use, this option may be ignored. It is no longer supported
by the default (runc) runtime.
This field is omitted when empty.
type: "integer"
format: "int64"
MemoryReservation:
description: "Memory soft limit in bytes."
type: "integer"
format: "int64"
MemorySwap:
description: |
Total memory limit (memory + swap). Set as `-1` to enable unlimited
swap.
type: "integer"
format: "int64"
MemorySwappiness:
description: |
Tune a container's memory swappiness behavior. Accepts an integer
between 0 and 100.
type: "integer"
format: "int64"
minimum: 0
maximum: 100
NanoCpus:
description: "CPU quota in units of 10<sup>-9</sup> CPUs."
type: "integer"
format: "int64"
OomKillDisable:
description: "Disable OOM Killer for the container."
type: "boolean"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
PidsLimit:
description: |
Tune a container's PIDs limit. Set `0` or `-1` for unlimited, or `null`
to not change.
type: "integer"
format: "int64"
x-nullable: true
Ulimits:
description: |
A list of resource limits to set in the container. For example:
```
{"Name": "nofile", "Soft": 1024, "Hard": 2048}
```
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
# Applicable to Windows
CpuCount:
description: |
The number of usable CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
CpuPercent:
description: |
The usable percentage of the available CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
IOMaximumIOps:
description: "Maximum IOps for the container system drive (Windows only)"
type: "integer"
format: "int64"
IOMaximumBandwidth:
description: |
Maximum IO in bytes per second for the container system drive
(Windows only).
type: "integer"
format: "int64"
Limit:
description: |
An object describing a limit on resources which can be requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
Pids:
description: |
Limits the maximum number of PIDs in the container. Set `0` for unlimited.
type: "integer"
format: "int64"
default: 0
example: 100
ResourceObject:
description: |
An object describing the resources which can be advertised by a node and
requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
GenericResources:
$ref: "#/definitions/GenericResources"
GenericResources:
description: |
User-defined resources can be either Integer resources (e.g, `SSD=3`) or
String resources (e.g, `GPU=UUID1`).
type: "array"
items:
type: "object"
properties:
NamedResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "string"
DiscreteResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "integer"
format: "int64"
example:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
HealthConfig:
description: "A test to perform to check that the container is healthy."
type: "object"
properties:
Test:
description: |
The test to perform. Possible values are:
- `[]` inherit healthcheck from image or parent image
- `["NONE"]` disable healthcheck
- `["CMD", args...]` exec arguments directly
- `["CMD-SHELL", command]` run command with system's default shell
type: "array"
items:
type: "string"
Interval:
description: |
The time to wait between checks in nanoseconds. It should be 0 or at
least 1000000 (1 ms). 0 means inherit.
type: "integer"
Timeout:
description: |
The time to wait before considering the check to have hung. It should
be 0 or at least 1000000 (1 ms). 0 means inherit.
type: "integer"
Retries:
description: |
The number of consecutive failures needed to consider a container as
unhealthy. 0 means inherit.
type: "integer"
StartPeriod:
description: |
Start period for the container to initialize before starting
health-retries countdown in nanoseconds. It should be 0 or at least
1000000 (1 ms). 0 means inherit.
type: "integer"
Health:
description: |
Health stores information about the container's healthcheck results.
type: "object"
x-nullable: true
properties:
Status:
description: |
Status is one of `none`, `starting`, `healthy` or `unhealthy`
- "none" Indicates there is no healthcheck
- "starting" Starting indicates that the container is not yet ready
- "healthy" Healthy indicates that the container is running correctly
- "unhealthy" Unhealthy indicates that the container has a problem
type: "string"
enum:
- "none"
- "starting"
- "healthy"
- "unhealthy"
example: "healthy"
FailingStreak:
description: "FailingStreak is the number of consecutive failures"
type: "integer"
example: 0
Log:
type: "array"
description: |
Log contains the last few results (oldest first)
items:
$ref: "#/definitions/HealthcheckResult"
HealthcheckResult:
description: |
HealthcheckResult stores information about a single run of a healthcheck probe
type: "object"
x-nullable: true
properties:
Start:
description: |
Date and time at which this check started in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "date-time"
example: "2020-01-04T10:44:24.496525531Z"
End:
description: |
Date and time at which this check ended in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2020-01-04T10:45:21.364524523Z"
ExitCode:
description: |
ExitCode meanings:
- `0` healthy
- `1` unhealthy
- `2` reserved (considered unhealthy)
- other values: error running probe
type: "integer"
example: 0
Output:
description: "Output from last check"
type: "string"
HostConfig:
description: "Container configuration that depends on the host we are running on"
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
# Applicable to all platforms
Binds:
type: "array"
description: |
A list of volume bindings for this container. Each volume binding
is a string in one of these forms:
- `host-src:container-dest[:options]` to bind-mount a host path
into the container. Both `host-src`, and `container-dest` must
be an _absolute_ path.
- `volume-name:container-dest[:options]` to bind-mount a volume
managed by a volume driver into the container. `container-dest`
must be an _absolute_ path.
`options` is an optional, comma-delimited list of:
- `nocopy` disables automatic copying of data from the container
path to the volume. The `nocopy` flag only applies to named volumes.
- `[ro|rw]` mounts a volume read-only or read-write, respectively.
If omitted or set to `rw`, volumes are mounted read-write.
- `[z|Z]` applies SELinux labels to allow or deny multiple containers
to read and write to the same volume.
- `z`: a _shared_ content label is applied to the content. This
label indicates that multiple containers can share the volume
content, for both reading and writing.
- `Z`: a _private unshared_ label is applied to the content.
This label indicates that only the current container can use
a private volume. Labeling systems such as SELinux require
proper labels to be placed on volume content that is mounted
into a container. Without a label, the security system can
prevent a container's processes from using the content. By
default, the labels set by the host operating system are not
modified.
- `[[r]shared|[r]slave|[r]private]` specifies mount
[propagation behavior](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt).
This only applies to bind-mounted volumes, not internal volumes
or named volumes. Mount propagation requires the source mount
point (the location where the source directory is mounted in the
host operating system) to have the correct propagation properties.
For shared volumes, the source mount point must be set to `shared`.
For slave volumes, the mount must be set to either `shared` or
`slave`.
items:
type: "string"
ContainerIDFile:
type: "string"
description: "Path to a file where the container ID is written"
LogConfig:
type: "object"
description: "The logging configuration for this container"
properties:
Type:
type: "string"
enum:
- "json-file"
- "syslog"
- "journald"
- "gelf"
- "fluentd"
- "awslogs"
- "splunk"
- "etwlogs"
- "none"
Config:
type: "object"
additionalProperties:
type: "string"
NetworkMode:
type: "string"
description: |
Network mode to use for this container. Supported standard values
are: `bridge`, `host`, `none`, and `container:<name|id>`. Any
other value is taken as a custom network's name to which this
container should connect to.
PortBindings:
$ref: "#/definitions/PortMap"
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
AutoRemove:
type: "boolean"
description: |
Automatically remove the container when the container's process
exits. This has no effect if `RestartPolicy` is set.
VolumeDriver:
type: "string"
description: "Driver that this container uses to mount volumes."
VolumesFrom:
type: "array"
description: |
A list of volumes to inherit from another container, specified in
the form `<container name>[:<ro|rw>]`.
items:
type: "string"
Mounts:
description: |
Specification for mounts to be added to the container.
type: "array"
items:
$ref: "#/definitions/Mount"
# Applicable to UNIX platforms
CapAdd:
type: "array"
description: |
A list of kernel capabilities to add to the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CapDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CgroupnsMode:
type: "string"
enum:
- "private"
- "host"
description: |
cgroup namespace mode for the container. Possible values are:
- `"private"`: the container runs in its own private cgroup namespace
- `"host"`: use the host system's cgroup namespace
If not specified, the daemon default is used, which can either be `"private"`
or `"host"`, depending on daemon version, kernel support and configuration.
Dns:
type: "array"
description: "A list of DNS servers for the container to use."
items:
type: "string"
DnsOptions:
type: "array"
description: "A list of DNS options."
items:
type: "string"
DnsSearch:
type: "array"
description: "A list of DNS search domains."
items:
type: "string"
ExtraHosts:
type: "array"
description: |
A list of hostnames/IP mappings to add to the container's `/etc/hosts`
file. Specified in the form `["hostname:IP"]`.
items:
type: "string"
GroupAdd:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
IpcMode:
type: "string"
description: |
IPC sharing mode for the container. Possible values are:
- `"none"`: own private IPC namespace, with /dev/shm not mounted
- `"private"`: own private IPC namespace
- `"shareable"`: own private IPC namespace, with a possibility to share it with other containers
- `"container:<name|id>"`: join another (shareable) container's IPC namespace
- `"host"`: use the host system's IPC namespace
If not specified, daemon default is used, which can either be `"private"`
or `"shareable"`, depending on daemon version and configuration.
Cgroup:
type: "string"
description: "Cgroup to use for the container."
Links:
type: "array"
description: |
A list of links for the container in the form `container_name:alias`.
items:
type: "string"
OomScoreAdj:
type: "integer"
description: |
An integer value containing the score given to the container in
order to tune OOM killer preferences.
example: 500
PidMode:
type: "string"
description: |
Set the PID (Process) Namespace mode for the container. It can be
either:
- `"container:<name|id>"`: joins another container's PID namespace
- `"host"`: use the host's PID namespace inside the container
Privileged:
type: "boolean"
description: "Gives the container full access to the host."
PublishAllPorts:
type: "boolean"
description: |
Allocates an ephemeral host port for all of a container's
exposed ports.
Ports are de-allocated when the container stops and allocated when
the container starts. The allocated port might be changed when
restarting the container.
The port is selected from the ephemeral port range that depends on
the kernel. For example, on Linux the range is defined by
`/proc/sys/net/ipv4/ip_local_port_range`.
ReadonlyRootfs:
type: "boolean"
description: "Mount the container's root filesystem as read only."
SecurityOpt:
type: "array"
description: |
A list of string values to customize labels for MLS systems, such
as SELinux.
items:
type: "string"
StorageOpt:
type: "object"
description: |
Storage driver options for this container, in the form `{"size": "120G"}`.
additionalProperties:
type: "string"
Tmpfs:
type: "object"
description: |
A map of container directories which should be replaced by tmpfs
mounts, and their corresponding mount options. For example:
```
{ "/run": "rw,noexec,nosuid,size=65536k" }
```
additionalProperties:
type: "string"
UTSMode:
type: "string"
description: "UTS namespace to use for the container."
UsernsMode:
type: "string"
description: |
Sets the usernamespace mode for the container when usernamespace
remapping option is enabled.
ShmSize:
type: "integer"
description: |
Size of `/dev/shm` in bytes. If omitted, the system uses 64MB.
minimum: 0
Sysctls:
type: "object"
description: |
A list of kernel parameters (sysctls) to set in the container.
For example:
```
{"net.ipv4.ip_forward": "1"}
```
additionalProperties:
type: "string"
Runtime:
type: "string"
description: "Runtime to use with this container."
# Applicable to Windows
ConsoleSize:
type: "array"
description: |
Initial console size, as an `[height, width]` array. (Windows only)
minItems: 2
maxItems: 2
items:
type: "integer"
minimum: 0
Isolation:
type: "string"
description: |
Isolation technology of the container. (Windows only)
enum:
- "default"
- "process"
- "hyperv"
MaskedPaths:
type: "array"
description: |
The list of paths to be masked inside the container (this overrides
the default set of paths).
items:
type: "string"
ReadonlyPaths:
type: "array"
description: |
The list of paths to be set as read-only inside the container
(this overrides the default set of paths).
items:
type: "string"
ContainerConfig:
description: |
Configuration for a container that is portable between hosts.
When used as `ContainerConfig` field in an image, `ContainerConfig` is an
optional field containing the configuration of the container that was last
committed when creating the image.
Previous versions of Docker builder used this field to store build cache,
and it is not in active use anymore.
type: "object"
properties:
Hostname:
description: |
The hostname to use for the container, as a valid RFC 1123 hostname.
type: "string"
example: "439f4e91bd1d"
Domainname:
description: |
The domain name to use for the container.
type: "string"
User:
description: "The user that commands are run as inside the container."
type: "string"
AttachStdin:
description: "Whether to attach to `stdin`."
type: "boolean"
default: false
AttachStdout:
description: "Whether to attach to `stdout`."
type: "boolean"
default: true
AttachStderr:
description: "Whether to attach to `stderr`."
type: "boolean"
default: true
ExposedPorts:
description: |
An object mapping ports to an empty object in the form:
`{"<port>/<tcp|udp|sctp>": {}}`
type: "object"
x-nullable: true
additionalProperties:
type: "object"
enum:
- {}
default: {}
example: {
"80/tcp": {},
"443/tcp": {}
}
Tty:
description: |
Attach standard streams to a TTY, including `stdin` if it is not closed.
type: "boolean"
default: false
OpenStdin:
description: "Open `stdin`"
type: "boolean"
default: false
StdinOnce:
description: "Close `stdin` after one attached client disconnects"
type: "boolean"
default: false
Env:
description: |
A list of environment variables to set inside the container in the
form `["VAR=value", ...]`. A variable without `=` is removed from the
environment, rather than to have an empty value.
type: "array"
items:
type: "string"
example:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Cmd:
description: |
Command to run specified as a string or an array of strings.
type: "array"
items:
type: "string"
example: ["/bin/sh"]
Healthcheck:
$ref: "#/definitions/HealthConfig"
ArgsEscaped:
description: "Command is already escaped (Windows only)"
type: "boolean"
default: false
example: false
x-nullable: true
Image:
description: |
The name (or reference) of the image to use when creating the container,
or which was used when the container was created.
type: "string"
example: "example-image:1.0"
Volumes:
description: |
An object mapping mount point paths inside the container to empty
objects.
type: "object"
additionalProperties:
type: "object"
enum:
- {}
default: {}
WorkingDir:
description: "The working directory for commands to run in."
type: "string"
example: "/public/"
Entrypoint:
description: |
The entry point for the container as a string or an array of strings.
If the array consists of exactly one empty string (`[""]`) then the
entry point is reset to system default (i.e., the entry point used by
docker when there is no `ENTRYPOINT` instruction in the `Dockerfile`).
type: "array"
items:
type: "string"
example: []
NetworkDisabled:
description: "Disable networking for the container."
type: "boolean"
x-nullable: true
MacAddress:
description: "MAC address of the container."
type: "string"
x-nullable: true
OnBuild:
description: |
`ONBUILD` metadata that were defined in the image's `Dockerfile`.
type: "array"
x-nullable: true
items:
type: "string"
example: []
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
StopSignal:
description: |
Signal to stop a container as a string or unsigned integer.
type: "string"
example: "SIGTERM"
x-nullable: true
StopTimeout:
description: "Timeout to stop a container in seconds."
type: "integer"
default: 10
x-nullable: true
Shell:
description: |
Shell for when `RUN`, `CMD`, and `ENTRYPOINT` uses a shell.
type: "array"
x-nullable: true
items:
type: "string"
example: ["/bin/sh", "-c"]
NetworkingConfig:
description: |
NetworkingConfig represents the container's networking configuration for
each of its interfaces.
It is used for the networking configs specified in the `docker create`
and `docker network connect` commands.
type: "object"
properties:
EndpointsConfig:
description: |
A mapping of network name to endpoint configuration for that network.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
example:
# putting an example here, instead of using the example values from
# /definitions/EndpointSettings, because containers/create currently
# does not support attaching to multiple networks, so the example request
# would be confusing if it showed that multiple networks can be contained
# in the EndpointsConfig.
# TODO remove once we support multiple networks on container create (see https://github.com/moby/moby/blob/07e6b843594e061f82baa5fa23c2ff7d536c2a05/daemon/create.go#L323)
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
NetworkSettings:
description: "NetworkSettings exposes the network settings in the API"
type: "object"
properties:
Bridge:
description: Name of the network's bridge (for example, `docker0`).
type: "string"
example: "docker0"
SandboxID:
description: SandboxID uniquely represents a container's network stack.
type: "string"
example: "9d12daf2c33f5959c8bf90aa513e4f65b561738661003029ec84830cd503a0c3"
HairpinMode:
description: |
Indicates if hairpin NAT should be enabled on the virtual interface.
type: "boolean"
example: false
LinkLocalIPv6Address:
description: IPv6 unicast address using the link-local prefix.
type: "string"
example: "fe80::42:acff:fe11:1"
LinkLocalIPv6PrefixLen:
description: Prefix length of the IPv6 unicast address.
type: "integer"
example: "64"
Ports:
$ref: "#/definitions/PortMap"
SandboxKey:
description: SandboxKey identifies the sandbox
type: "string"
example: "/var/run/docker/netns/8ab54b426c38"
# TODO is SecondaryIPAddresses actually used?
SecondaryIPAddresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO is SecondaryIPv6Addresses actually used?
SecondaryIPv6Addresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO properties below are part of DefaultNetworkSettings, which is
# marked as deprecated since Docker 1.9 and to be removed in Docker v17.12
EndpointID:
description: |
EndpointID uniquely represents a service endpoint in a Sandbox.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.1"
GlobalIPv6Address:
description: |
Global IPv6 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 64
IPAddress:
description: |
IPv4 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address for this network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8:2::100"
MacAddress:
description: |
MAC address for the container on the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "02:42:ac:11:00:04"
Networks:
description: |
Information about all networks that the container is connected to.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Address:
description: Address represents an IPv4 or IPv6 IP address.
type: "object"
properties:
Addr:
description: IP address.
type: "string"
PrefixLen:
description: Mask length of the IP address.
type: "integer"
PortMap:
description: |
PortMap describes the mapping of container ports to host ports, using the
container's port-number and protocol as key in the format `<port>/<protocol>`,
for example, `80/udp`.
If a container's port is mapped for multiple protocols, separate entries
are added to the mapping table.
type: "object"
additionalProperties:
type: "array"
x-nullable: true
items:
$ref: "#/definitions/PortBinding"
example:
"443/tcp":
- HostIp: "127.0.0.1"
HostPort: "4443"
"80/tcp":
- HostIp: "0.0.0.0"
HostPort: "80"
- HostIp: "0.0.0.0"
HostPort: "8080"
"80/udp":
- HostIp: "0.0.0.0"
HostPort: "80"
"53/udp":
- HostIp: "0.0.0.0"
HostPort: "53"
"2377/tcp": null
PortBinding:
description: |
PortBinding represents a binding between a host IP address and a host
port.
type: "object"
properties:
HostIp:
description: "Host IP address that the container's port is mapped to."
type: "string"
example: "127.0.0.1"
HostPort:
description: "Host port number that the container's port is mapped to."
type: "string"
example: "4443"
GraphDriverData:
description: |
Information about the storage driver used to store the container's and
image's filesystem.
type: "object"
required: [Name, Data]
properties:
Name:
description: "Name of the storage driver."
type: "string"
x-nullable: false
example: "overlay2"
Data:
description: |
Low-level storage metadata, provided as key/value pairs.
This information is driver-specific, and depends on the storage-driver
in use, and should be used for informational purposes only.
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example: {
"MergedDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/merged",
"UpperDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/diff",
"WorkDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/work"
}
ImageInspect:
description: |
Information about an image in the local image cache.
type: "object"
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Parent:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
Comment:
description: |
Optional message that was set when committing or importing the image.
type: "string"
x-nullable: false
example: ""
Created:
description: |
Date and time at which the image was created, formatted in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
x-nullable: false
example: "2022-02-04T21:20:12.497794809Z"
Container:
description: |
The ID of the container that was used to create the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "65974bc86f1770ae4bff79f651ebdbce166ae9aada632ee3fa9af3a264911735"
ContainerConfig:
$ref: "#/definitions/ContainerConfig"
DockerVersion:
description: |
The version of Docker that was used to build the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "20.10.7"
Author:
description: |
Name of the author that was specified when committing the image, or as
specified through MAINTAINER (deprecated) in the Dockerfile.
type: "string"
x-nullable: false
example: ""
Config:
$ref: "#/definitions/ContainerConfig"
Architecture:
description: |
Hardware CPU architecture that the image runs on.
type: "string"
x-nullable: false
example: "arm"
Variant:
description: |
CPU architecture variant (presently ARM-only).
type: "string"
x-nullable: true
example: "v7"
Os:
description: |
Operating System the image is built to run on.
type: "string"
x-nullable: false
example: "linux"
OsVersion:
description: |
Operating System version the image is built to run on (especially
for Windows).
type: "string"
example: ""
x-nullable: true
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
GraphDriver:
$ref: "#/definitions/GraphDriverData"
RootFS:
description: |
Information about the image's RootFS, including the layer IDs.
type: "object"
required: [Type]
properties:
Type:
type: "string"
x-nullable: false
example: "layers"
Layers:
type: "array"
items:
type: "string"
example:
- "sha256:1834950e52ce4d5a88a1bbd131c537f4d0e56d10ff0dd69e66be3b7dfa9df7e6"
- "sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef"
Metadata:
description: |
Additional metadata of the image in the local cache. This information
is local to the daemon, and not part of the image itself.
type: "object"
properties:
LastTagTime:
description: |
Date and time at which the image was last tagged in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
This information is only available if the image was tagged locally,
and omitted otherwise.
type: "string"
format: "dateTime"
example: "2022-02-28T14:40:02.623929178Z"
x-nullable: true
ImageSummary:
type: "object"
required:
- Id
- ParentId
- RepoTags
- RepoDigests
- Created
- Size
- SharedSize
- VirtualSize
- Labels
- Containers
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
ParentId:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Created:
description: |
Date and time at which the image was created as a Unix timestamp
(number of seconds sinds EPOCH).
type: "integer"
x-nullable: false
example: "1644009612"
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
SharedSize:
description: |
Total size of image layers that are shared between this image and other
images.
This size is not calculated by default. `-1` indicates that the value
has not been set / calculated.
type: "integer"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
Labels:
description: "User-defined key/value metadata."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Containers:
description: |
Number of containers using this image. Includes both stopped and running
containers.
This size is not calculated by default, and depends on which API endpoint
is used. `-1` indicates that the value has not been set / calculated.
x-nullable: false
type: "integer"
example: 2
AuthConfig:
type: "object"
properties:
username:
type: "string"
password:
type: "string"
email:
type: "string"
serveraddress:
type: "string"
example:
username: "hannibal"
password: "xxxx"
serveraddress: "https://index.docker.io/v1/"
ProcessConfig:
type: "object"
properties:
privileged:
type: "boolean"
user:
type: "string"
tty:
type: "boolean"
entrypoint:
type: "string"
arguments:
type: "array"
items:
type: "string"
Volume:
type: "object"
required: [Name, Driver, Mountpoint, Labels, Scope, Options]
properties:
Name:
type: "string"
description: "Name of the volume."
x-nullable: false
example: "tardis"
Driver:
type: "string"
description: "Name of the volume driver used by the volume."
x-nullable: false
example: "custom"
Mountpoint:
type: "string"
description: "Mount path of the volume on the host."
x-nullable: false
example: "/var/lib/docker/volumes/tardis"
CreatedAt:
type: "string"
format: "dateTime"
description: "Date/Time the volume was created."
example: "2016-06-07T20:31:11.853781916Z"
Status:
type: "object"
description: |
Low-level details about the volume, provided by the volume driver.
Details are returned as a map with key/value pairs:
`{"key":"value","key2":"value2"}`.
The `Status` field is optional, and is omitted if the volume driver
does not support this feature.
additionalProperties:
type: "object"
example:
hello: "world"
Labels:
type: "object"
description: "User-defined key/value metadata."
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Scope:
type: "string"
description: |
The level at which the volume exists. Either `global` for cluster-wide,
or `local` for machine level.
default: "local"
x-nullable: false
enum: ["local", "global"]
example: "local"
Options:
type: "object"
description: |
The driver specific options used when creating the volume.
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
UsageData:
type: "object"
x-nullable: true
x-go-name: "UsageData"
required: [Size, RefCount]
description: |
Usage details about the volume. This information is used by the
`GET /system/df` endpoint, and omitted in other endpoints.
properties:
Size:
type: "integer"
default: -1
description: |
Amount of disk space used by the volume (in bytes). This information
is only available for volumes created with the `"local"` volume
driver. For volumes created with other volume drivers, this field
is set to `-1` ("not available")
x-nullable: false
RefCount:
type: "integer"
default: -1
description: |
The number of containers referencing this volume. This field
is set to `-1` if the reference-count is not available.
x-nullable: false
VolumeCreateOptions:
description: "Volume configuration"
type: "object"
title: "VolumeConfig"
x-go-name: "CreateOptions"
properties:
Name:
description: |
The new volume's name. If not specified, Docker generates a name.
type: "string"
x-nullable: false
example: "tardis"
Driver:
description: "Name of the volume driver to use."
type: "string"
default: "local"
x-nullable: false
example: "custom"
DriverOpts:
description: |
A mapping of driver options and values. These options are
passed directly to the driver and are driver specific.
type: "object"
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
VolumeListResponse:
type: "object"
title: "VolumeListResponse"
x-go-name: "ListResponse"
description: "Volume list response"
properties:
Volumes:
type: "array"
description: "List of volumes"
items:
$ref: "#/definitions/Volume"
Warnings:
type: "array"
description: |
Warnings that occurred when fetching the list of volumes.
items:
type: "string"
example: []
Network:
type: "object"
properties:
Name:
type: "string"
Id:
type: "string"
Created:
type: "string"
format: "dateTime"
Scope:
type: "string"
Driver:
type: "string"
EnableIPv6:
type: "boolean"
IPAM:
$ref: "#/definitions/IPAM"
Internal:
type: "boolean"
Attachable:
type: "boolean"
Ingress:
type: "boolean"
Containers:
type: "object"
additionalProperties:
$ref: "#/definitions/NetworkContainer"
Options:
type: "object"
additionalProperties:
type: "string"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
Name: "net01"
Id: "7d86d31b1478e7cca9ebed7e73aa0fdeec46c5ca29497431d3007d2d9e15ed99"
Created: "2016-10-19T04:33:30.360899459Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
IPAM:
Driver: "default"
Config:
- Subnet: "172.19.0.0/16"
Gateway: "172.19.0.1"
Options:
foo: "bar"
Internal: false
Attachable: false
Ingress: false
Containers:
19a4d5d687db25203351ed79d478946f861258f018fe384f229f2efa4b23513c:
Name: "test"
EndpointID: "628cadb8bcb92de107b2a1e516cbffe463e321f548feb37697cce00ad694f21a"
MacAddress: "02:42:ac:13:00:02"
IPv4Address: "172.19.0.2/16"
IPv6Address: ""
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
IPAM:
type: "object"
properties:
Driver:
description: "Name of the IPAM driver to use."
type: "string"
default: "default"
Config:
description: |
List of IPAM configuration options, specified as a map:
```
{"Subnet": <CIDR>, "IPRange": <CIDR>, "Gateway": <IP address>, "AuxAddress": <device_name:IP address>}
```
type: "array"
items:
$ref: "#/definitions/IPAMConfig"
Options:
description: "Driver-specific options, specified as a map."
type: "object"
additionalProperties:
type: "string"
IPAMConfig:
type: "object"
properties:
Subnet:
type: "string"
IPRange:
type: "string"
Gateway:
type: "string"
AuxiliaryAddresses:
type: "object"
additionalProperties:
type: "string"
NetworkContainer:
type: "object"
properties:
Name:
type: "string"
EndpointID:
type: "string"
MacAddress:
type: "string"
IPv4Address:
type: "string"
IPv6Address:
type: "string"
BuildInfo:
type: "object"
properties:
id:
type: "string"
stream:
type: "string"
error:
type: "string"
errorDetail:
$ref: "#/definitions/ErrorDetail"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
aux:
$ref: "#/definitions/ImageID"
BuildCache:
type: "object"
properties:
ID:
type: "string"
Parent:
type: "string"
Type:
type: "string"
Description:
type: "string"
InUse:
type: "boolean"
Shared:
type: "boolean"
Size:
description: |
Amount of disk space used by the build cache (in bytes).
type: "integer"
CreatedAt:
description: |
Date and time at which the build cache was created in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
LastUsedAt:
description: |
Date and time at which the build cache was last used in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
x-nullable: true
example: "2017-08-09T07:09:37.632105588Z"
UsageCount:
type: "integer"
ImageID:
type: "object"
description: "Image ID or Digest"
properties:
ID:
type: "string"
example:
ID: "sha256:85f05633ddc1c50679be2b16a0479ab6f7637f8884e0cfe0f4d20e1ebb3d6e7c"
CreateImageInfo:
type: "object"
properties:
id:
type: "string"
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
PushImageInfo:
type: "object"
properties:
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
ErrorDetail:
type: "object"
properties:
code:
type: "integer"
message:
type: "string"
ProgressDetail:
type: "object"
properties:
current:
type: "integer"
total:
type: "integer"
ErrorResponse:
description: "Represents an error."
type: "object"
required: ["message"]
properties:
message:
description: "The error message."
type: "string"
x-nullable: false
example:
message: "Something went wrong."
IdResponse:
description: "Response to an API call that returns just an Id"
type: "object"
required: ["Id"]
properties:
Id:
description: "The id of the newly created object."
type: "string"
x-nullable: false
EndpointSettings:
description: "Configuration for a network endpoint."
type: "object"
properties:
# Configurations
IPAMConfig:
$ref: "#/definitions/EndpointIPAMConfig"
Links:
type: "array"
items:
type: "string"
example:
- "container_1"
- "container_2"
Aliases:
type: "array"
items:
type: "string"
example:
- "server_x"
- "server_y"
# Operational data
NetworkID:
description: |
Unique ID of the network.
type: "string"
example: "08754567f1f40222263eab4102e1c733ae697e8e354aa9cd6e18d7402835292a"
EndpointID:
description: |
Unique ID for the service endpoint in a Sandbox.
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for this network.
type: "string"
example: "172.17.0.1"
IPAddress:
description: |
IPv4 address.
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address.
type: "string"
example: "2001:db8:2::100"
GlobalIPv6Address:
description: |
Global IPv6 address.
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
type: "integer"
format: "int64"
example: 64
MacAddress:
description: |
MAC address for the endpoint on this network.
type: "string"
example: "02:42:ac:11:00:04"
DriverOpts:
description: |
DriverOpts is a mapping of driver options and values. These options
are passed directly to the driver and are driver specific.
type: "object"
x-nullable: true
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
EndpointIPAMConfig:
description: |
EndpointIPAMConfig represents an endpoint's IPAM configuration.
type: "object"
x-nullable: true
properties:
IPv4Address:
type: "string"
example: "172.20.30.33"
IPv6Address:
type: "string"
example: "2001:db8:abcd::3033"
LinkLocalIPs:
type: "array"
items:
type: "string"
example:
- "169.254.34.68"
- "fe80::3468"
PluginMount:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Source, Destination, Type, Options]
properties:
Name:
type: "string"
x-nullable: false
example: "some-mount"
Description:
type: "string"
x-nullable: false
example: "This is a mount that's used by the plugin."
Settable:
type: "array"
items:
type: "string"
Source:
type: "string"
example: "/var/lib/docker/plugins/"
Destination:
type: "string"
x-nullable: false
example: "/mnt/state"
Type:
type: "string"
x-nullable: false
example: "bind"
Options:
type: "array"
items:
type: "string"
example:
- "rbind"
- "rw"
PluginDevice:
type: "object"
required: [Name, Description, Settable, Path]
x-nullable: false
properties:
Name:
type: "string"
x-nullable: false
Description:
type: "string"
x-nullable: false
Settable:
type: "array"
items:
type: "string"
Path:
type: "string"
example: "/dev/fuse"
PluginEnv:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
Description:
x-nullable: false
type: "string"
Settable:
type: "array"
items:
type: "string"
Value:
type: "string"
PluginInterfaceType:
type: "object"
x-nullable: false
required: [Prefix, Capability, Version]
properties:
Prefix:
type: "string"
x-nullable: false
Capability:
type: "string"
x-nullable: false
Version:
type: "string"
x-nullable: false
PluginPrivilege:
description: |
Describes a permission the user has to accept upon installing
the plugin.
type: "object"
x-go-name: "PluginPrivilege"
properties:
Name:
type: "string"
example: "network"
Description:
type: "string"
Value:
type: "array"
items:
type: "string"
example:
- "host"
Plugin:
description: "A plugin for the Engine API"
type: "object"
required: [Settings, Enabled, Config, Name]
properties:
Id:
type: "string"
example: "5724e2c8652da337ab2eedd19fc6fc0ec908e4bd907c7421bf6a8dfc70c4c078"
Name:
type: "string"
x-nullable: false
example: "tiborvass/sample-volume-plugin"
Enabled:
description:
True if the plugin is running. False if the plugin is not running,
only installed.
type: "boolean"
x-nullable: false
example: true
Settings:
description: "Settings that can be modified by users."
type: "object"
x-nullable: false
required: [Args, Devices, Env, Mounts]
properties:
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
type: "string"
example:
- "DEBUG=0"
Args:
type: "array"
items:
type: "string"
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PluginReference:
description: "plugin remote reference used to push/pull the plugin"
type: "string"
x-nullable: false
example: "localhost:5000/tiborvass/sample-volume-plugin:latest"
Config:
description: "The config of a plugin."
type: "object"
x-nullable: false
required:
- Description
- Documentation
- Interface
- Entrypoint
- WorkDir
- Network
- Linux
- PidHost
- PropagatedMount
- IpcHost
- Mounts
- Env
- Args
properties:
DockerVersion:
description: "Docker Version used to create the plugin"
type: "string"
x-nullable: false
example: "17.06.0-ce"
Description:
type: "string"
x-nullable: false
example: "A sample volume plugin for Docker"
Documentation:
type: "string"
x-nullable: false
example: "https://docs.docker.com/engine/extend/plugins/"
Interface:
description: "The interface between Docker and the plugin"
x-nullable: false
type: "object"
required: [Types, Socket]
properties:
Types:
type: "array"
items:
$ref: "#/definitions/PluginInterfaceType"
example:
- "docker.volumedriver/1.0"
Socket:
type: "string"
x-nullable: false
example: "plugins.sock"
ProtocolScheme:
type: "string"
example: "some.protocol/v1.0"
description: "Protocol to use for clients connecting to the plugin."
enum:
- ""
- "moby.plugins.http/v1"
Entrypoint:
type: "array"
items:
type: "string"
example:
- "/usr/bin/sample-volume-plugin"
- "/data"
WorkDir:
type: "string"
x-nullable: false
example: "/bin/"
User:
type: "object"
x-nullable: false
properties:
UID:
type: "integer"
format: "uint32"
example: 1000
GID:
type: "integer"
format: "uint32"
example: 1000
Network:
type: "object"
x-nullable: false
required: [Type]
properties:
Type:
x-nullable: false
type: "string"
example: "host"
Linux:
type: "object"
x-nullable: false
required: [Capabilities, AllowAllDevices, Devices]
properties:
Capabilities:
type: "array"
items:
type: "string"
example:
- "CAP_SYS_ADMIN"
- "CAP_SYSLOG"
AllowAllDevices:
type: "boolean"
x-nullable: false
example: false
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PropagatedMount:
type: "string"
x-nullable: false
example: "/mnt/volumes"
IpcHost:
type: "boolean"
x-nullable: false
example: false
PidHost:
type: "boolean"
x-nullable: false
example: false
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
$ref: "#/definitions/PluginEnv"
example:
- Name: "DEBUG"
Description: "If set, prints debug messages"
Settable: null
Value: "0"
Args:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
example: "args"
Description:
x-nullable: false
type: "string"
example: "command line arguments"
Settable:
type: "array"
items:
type: "string"
Value:
type: "array"
items:
type: "string"
rootfs:
type: "object"
properties:
type:
type: "string"
example: "layers"
diff_ids:
type: "array"
items:
type: "string"
example:
- "sha256:675532206fbf3030b8458f88d6e26d4eb1577688a25efec97154c94e8b6b4887"
- "sha256:e216a057b1cb1efc11f8a268f37ef62083e70b1b38323ba252e25ac88904a7e8"
ObjectVersion:
description: |
The version number of the object such as node, service, etc. This is needed
to avoid conflicting writes. The client must send the version number along
with the modified specification when updating these objects.
This approach ensures safe concurrency and determinism in that the change
on the object may not be applied if the version number has changed from the
last read. In other words, if two update requests specify the same base
version, only one of the requests can succeed. As a result, two separate
update requests that happen at the same time will not unintentionally
overwrite each other.
type: "object"
properties:
Index:
type: "integer"
format: "uint64"
example: 373531
NodeSpec:
type: "object"
properties:
Name:
description: "Name for the node."
type: "string"
example: "my-node"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Role:
description: "Role of the node."
type: "string"
enum:
- "worker"
- "manager"
example: "manager"
Availability:
description: "Availability of the node."
type: "string"
enum:
- "active"
- "pause"
- "drain"
example: "active"
example:
Availability: "active"
Name: "node-name"
Role: "manager"
Labels:
foo: "bar"
Node:
type: "object"
properties:
ID:
type: "string"
example: "24ifsmvkjbyhk"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the node was added to the swarm in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the node was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/NodeSpec"
Description:
$ref: "#/definitions/NodeDescription"
Status:
$ref: "#/definitions/NodeStatus"
ManagerStatus:
$ref: "#/definitions/ManagerStatus"
NodeDescription:
description: |
NodeDescription encapsulates the properties of the Node as reported by the
agent.
type: "object"
properties:
Hostname:
type: "string"
example: "bf3067039e47"
Platform:
$ref: "#/definitions/Platform"
Resources:
$ref: "#/definitions/ResourceObject"
Engine:
$ref: "#/definitions/EngineDescription"
TLSInfo:
$ref: "#/definitions/TLSInfo"
Platform:
description: |
Platform represents the platform (Arch/OS).
type: "object"
properties:
Architecture:
description: |
Architecture represents the hardware architecture (for example,
`x86_64`).
type: "string"
example: "x86_64"
OS:
description: |
OS represents the Operating System (for example, `linux` or `windows`).
type: "string"
example: "linux"
EngineDescription:
description: "EngineDescription provides information about an engine."
type: "object"
properties:
EngineVersion:
type: "string"
example: "17.06.0"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
foo: "bar"
Plugins:
type: "array"
items:
type: "object"
properties:
Type:
type: "string"
Name:
type: "string"
example:
- Type: "Log"
Name: "awslogs"
- Type: "Log"
Name: "fluentd"
- Type: "Log"
Name: "gcplogs"
- Type: "Log"
Name: "gelf"
- Type: "Log"
Name: "journald"
- Type: "Log"
Name: "json-file"
- Type: "Log"
Name: "logentries"
- Type: "Log"
Name: "splunk"
- Type: "Log"
Name: "syslog"
- Type: "Network"
Name: "bridge"
- Type: "Network"
Name: "host"
- Type: "Network"
Name: "ipvlan"
- Type: "Network"
Name: "macvlan"
- Type: "Network"
Name: "null"
- Type: "Network"
Name: "overlay"
- Type: "Volume"
Name: "local"
- Type: "Volume"
Name: "localhost:5000/vieux/sshfs:latest"
- Type: "Volume"
Name: "vieux/sshfs:latest"
TLSInfo:
description: |
Information about the issuer of leaf TLS certificates and the trusted root
CA certificate.
type: "object"
properties:
TrustRoot:
description: |
The root CA certificate(s) that are used to validate leaf TLS
certificates.
type: "string"
CertIssuerSubject:
description:
The base64-url-safe-encoded raw subject bytes of the issuer.
type: "string"
CertIssuerPublicKey:
description: |
The base64-url-safe-encoded raw public key bytes of the issuer.
type: "string"
example:
TrustRoot: |
-----BEGIN CERTIFICATE-----
MIIBajCCARCgAwIBAgIUbYqrLSOSQHoxD8CwG6Bi2PJi9c8wCgYIKoZIzj0EAwIw
EzERMA8GA1UEAxMIc3dhcm0tY2EwHhcNMTcwNDI0MjE0MzAwWhcNMzcwNDE5MjE0
MzAwWjATMREwDwYDVQQDEwhzd2FybS1jYTBZMBMGByqGSM49AgEGCCqGSM49AwEH
A0IABJk/VyMPYdaqDXJb/VXh5n/1Yuv7iNrxV3Qb3l06XD46seovcDWs3IZNV1lf
3Skyr0ofcchipoiHkXBODojJydSjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMB
Af8EBTADAQH/MB0GA1UdDgQWBBRUXxuRcnFjDfR/RIAUQab8ZV/n4jAKBggqhkjO
PQQDAgNIADBFAiAy+JTe6Uc3KyLCMiqGl2GyWGQqQDEcO3/YG36x7om65AIhAJvz
pxv6zFeVEkAEEkqIYi0omA9+CjanB/6Bz4n1uw8H
-----END CERTIFICATE-----
CertIssuerSubject: "MBMxETAPBgNVBAMTCHN3YXJtLWNh"
CertIssuerPublicKey: "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEmT9XIw9h1qoNclv9VeHmf/Vi6/uI2vFXdBveXTpcPjqx6i9wNazchk1XWV/dKTKvSh9xyGKmiIeRcE4OiMnJ1A=="
NodeStatus:
description: |
NodeStatus represents the status of a node.
It provides the current status of the node, as seen by the manager.
type: "object"
properties:
State:
$ref: "#/definitions/NodeState"
Message:
type: "string"
example: ""
Addr:
description: "IP address of the node."
type: "string"
example: "172.17.0.2"
NodeState:
description: "NodeState represents the state of a node."
type: "string"
enum:
- "unknown"
- "down"
- "ready"
- "disconnected"
example: "ready"
ManagerStatus:
description: |
ManagerStatus represents the status of a manager.
It provides the current status of a node's manager component, if the node
is a manager.
x-nullable: true
type: "object"
properties:
Leader:
type: "boolean"
default: false
example: true
Reachability:
$ref: "#/definitions/Reachability"
Addr:
description: |
The IP address and port at which the manager is reachable.
type: "string"
example: "10.0.0.46:2377"
Reachability:
description: "Reachability represents the reachability of a node."
type: "string"
enum:
- "unknown"
- "unreachable"
- "reachable"
example: "reachable"
SwarmSpec:
description: "User modifiable swarm configuration."
type: "object"
properties:
Name:
description: "Name of the swarm."
type: "string"
example: "default"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.corp.type: "production"
com.example.corp.department: "engineering"
Orchestration:
description: "Orchestration configuration."
type: "object"
x-nullable: true
properties:
TaskHistoryRetentionLimit:
description: |
The number of historic tasks to keep per instance or node. If
negative, never remove completed or failed tasks.
type: "integer"
format: "int64"
example: 10
Raft:
description: "Raft configuration."
type: "object"
properties:
SnapshotInterval:
description: "The number of log entries between snapshots."
type: "integer"
format: "uint64"
example: 10000
KeepOldSnapshots:
description: |
The number of snapshots to keep beyond the current snapshot.
type: "integer"
format: "uint64"
LogEntriesForSlowFollowers:
description: |
The number of log entries to keep around to sync up slow followers
after a snapshot is created.
type: "integer"
format: "uint64"
example: 500
ElectionTick:
description: |
The number of ticks that a follower will wait for a message from
the leader before becoming a candidate and starting an election.
`ElectionTick` must be greater than `HeartbeatTick`.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 3
HeartbeatTick:
description: |
The number of ticks between heartbeats. Every HeartbeatTick ticks,
the leader will send a heartbeat to the followers.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 1
Dispatcher:
description: "Dispatcher configuration."
type: "object"
x-nullable: true
properties:
HeartbeatPeriod:
description: |
The delay for an agent to send a heartbeat to the dispatcher.
type: "integer"
format: "int64"
example: 5000000000
CAConfig:
description: "CA configuration."
type: "object"
x-nullable: true
properties:
NodeCertExpiry:
description: "The duration node certificates are issued for."
type: "integer"
format: "int64"
example: 7776000000000000
ExternalCAs:
description: |
Configuration for forwarding signing requests to an external
certificate authority.
type: "array"
items:
type: "object"
properties:
Protocol:
description: |
Protocol for communication with the external CA (currently
only `cfssl` is supported).
type: "string"
enum:
- "cfssl"
default: "cfssl"
URL:
description: |
URL where certificate signing requests should be sent.
type: "string"
Options:
description: |
An object with key/value pairs that are interpreted as
protocol-specific options for the external CA driver.
type: "object"
additionalProperties:
type: "string"
CACert:
description: |
The root CA certificate (in PEM format) this external CA uses
to issue TLS certificates (assumed to be to the current swarm
root CA certificate if not provided).
type: "string"
SigningCACert:
description: |
The desired signing CA certificate for all swarm node TLS leaf
certificates, in PEM format.
type: "string"
SigningCAKey:
description: |
The desired signing CA key for all swarm node TLS leaf certificates,
in PEM format.
type: "string"
ForceRotate:
description: |
An integer whose purpose is to force swarm to generate a new
signing CA certificate and key, if none have been specified in
`SigningCACert` and `SigningCAKey`
format: "uint64"
type: "integer"
EncryptionConfig:
description: "Parameters related to encryption-at-rest."
type: "object"
properties:
AutoLockManagers:
description: |
If set, generate a key and use it to lock data stored on the
managers.
type: "boolean"
example: false
TaskDefaults:
description: "Defaults for creating tasks in this cluster."
type: "object"
properties:
LogDriver:
description: |
The log driver to use for tasks created in the orchestrator if
unspecified by a service.
Updating this value only affects new tasks. Existing tasks continue
to use their previously configured log driver until recreated.
type: "object"
properties:
Name:
description: |
The log driver to use as a default for new tasks.
type: "string"
example: "json-file"
Options:
description: |
Driver-specific options for the selectd log driver, specified
as key/value pairs.
type: "object"
additionalProperties:
type: "string"
example:
"max-file": "10"
"max-size": "100m"
# The Swarm information for `GET /info`. It is the same as `GET /swarm`, but
# without `JoinTokens`.
ClusterInfo:
description: |
ClusterInfo represents information about the swarm as is returned by the
"/info" endpoint. Join-tokens are not included.
x-nullable: true
type: "object"
properties:
ID:
description: "The ID of the swarm."
type: "string"
example: "abajmipo7b4xz5ip2nrla6b11"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the swarm was initialised in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the swarm was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/SwarmSpec"
TLSInfo:
$ref: "#/definitions/TLSInfo"
RootRotationInProgress:
description: |
Whether there is currently a root CA rotation in progress for the swarm
type: "boolean"
example: false
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
If no port is set or is set to 0, the default port (4789) is used.
type: "integer"
format: "uint32"
default: 4789
example: 4789
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global scope
networks.
type: "array"
items:
type: "string"
format: "CIDR"
example: ["10.10.0.0/16", "20.20.0.0/16"]
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created from the
default subnet pool.
type: "integer"
format: "uint32"
maximum: 29
default: 24
example: 24
JoinTokens:
description: |
JoinTokens contains the tokens workers and managers need to join the swarm.
type: "object"
properties:
Worker:
description: |
The token workers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx"
Manager:
description: |
The token managers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
Swarm:
type: "object"
allOf:
- $ref: "#/definitions/ClusterInfo"
- type: "object"
properties:
JoinTokens:
$ref: "#/definitions/JoinTokens"
TaskSpec:
description: "User modifiable task configuration."
type: "object"
properties:
PluginSpec:
type: "object"
description: |
Plugin spec for the service. *(Experimental release only.)*
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Name:
description: "The name or 'alias' to use for the plugin."
type: "string"
Remote:
description: "The plugin image reference to use."
type: "string"
Disabled:
description: "Disable the plugin once scheduled."
type: "boolean"
PluginPrivilege:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
ContainerSpec:
type: "object"
description: |
Container spec for the service.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Image:
description: "The image name to use for the container"
type: "string"
Labels:
description: "User-defined key/value data."
type: "object"
additionalProperties:
type: "string"
Command:
description: "The command to be run in the image."
type: "array"
items:
type: "string"
Args:
description: "Arguments to the command."
type: "array"
items:
type: "string"
Hostname:
description: |
The hostname to use for the container, as a valid
[RFC 1123](https://tools.ietf.org/html/rfc1123) hostname.
type: "string"
Env:
description: |
A list of environment variables in the form `VAR=value`.
type: "array"
items:
type: "string"
Dir:
description: "The working directory for commands to run in."
type: "string"
User:
description: "The user inside the container."
type: "string"
Groups:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
Privileges:
type: "object"
description: "Security options for the container"
properties:
CredentialSpec:
type: "object"
description: "CredentialSpec for managed service account (Windows only)"
properties:
Config:
type: "string"
example: "0bt9dmxjvjiqermk6xrop3ekq"
description: |
Load credential spec from a Swarm Config with the given ID.
The specified config must also be present in the Configs
field with the Runtime property set.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
File:
type: "string"
example: "spec.json"
description: |
Load credential spec from this file. The file is read by
the daemon, and must be present in the `CredentialSpecs`
subdirectory in the docker data directory, which defaults
to `C:\ProgramData\Docker\` on Windows.
For example, specifying `spec.json` loads
`C:\ProgramData\Docker\CredentialSpecs\spec.json`.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
Registry:
type: "string"
description: |
Load credential spec from this value in the Windows
registry. The specified registry value must be located in:
`HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\Containers\CredentialSpecs`
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
SELinuxContext:
type: "object"
description: "SELinux labels of the container"
properties:
Disable:
type: "boolean"
description: "Disable SELinux"
User:
type: "string"
description: "SELinux user label"
Role:
type: "string"
description: "SELinux role label"
Type:
type: "string"
description: "SELinux type label"
Level:
type: "string"
description: "SELinux level label"
TTY:
description: "Whether a pseudo-TTY should be allocated."
type: "boolean"
OpenStdin:
description: "Open `stdin`"
type: "boolean"
ReadOnly:
description: "Mount the container's root filesystem as read only."
type: "boolean"
Mounts:
description: |
Specification for mounts to be added to containers created as part
of the service.
type: "array"
items:
$ref: "#/definitions/Mount"
StopSignal:
description: "Signal to stop the container."
type: "string"
StopGracePeriod:
description: |
Amount of time to wait for the container to terminate before
forcefully killing it.
type: "integer"
format: "int64"
HealthCheck:
$ref: "#/definitions/HealthConfig"
Hosts:
type: "array"
description: |
A list of hostname/IP mappings to add to the container's `hosts`
file. The format of extra hosts is specified in the
[hosts(5)](http://man7.org/linux/man-pages/man5/hosts.5.html)
man page:
IP_address canonical_hostname [aliases...]
items:
type: "string"
DNSConfig:
description: |
Specification for DNS related configurations in resolver configuration
file (`resolv.conf`).
type: "object"
properties:
Nameservers:
description: "The IP addresses of the name servers."
type: "array"
items:
type: "string"
Search:
description: "A search list for host-name lookup."
type: "array"
items:
type: "string"
Options:
description: |
A list of internal resolver variables to be modified (e.g.,
`debug`, `ndots:3`, etc.).
type: "array"
items:
type: "string"
Secrets:
description: |
Secrets contains references to zero or more secrets that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
SecretID:
description: |
SecretID represents the ID of the specific secret that we're
referencing.
type: "string"
SecretName:
description: |
SecretName is the name of the secret that this references,
but this is just provided for lookup/display purposes. The
secret in the reference will be identified by its ID.
type: "string"
Configs:
description: |
Configs contains references to zero or more configs that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually exclusive
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
Runtime:
description: |
Runtime represents a target that is not mounted into the
container but is used by the task
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually
> exclusive
type: "object"
ConfigID:
description: |
ConfigID represents the ID of the specific config that we're
referencing.
type: "string"
ConfigName:
description: |
ConfigName is the name of the config that this references,
but this is just provided for lookup/display purposes. The
config in the reference will be identified by its ID.
type: "string"
Isolation:
type: "string"
description: |
Isolation technology of the containers running the service.
(Windows only)
enum:
- "default"
- "process"
- "hyperv"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
Sysctls:
description: |
Set kernel namedspaced parameters (sysctls) in the container.
The Sysctls option on services accepts the same sysctls as the
are supported on containers. Note that while the same sysctls are
supported, no guarantees or checks are made about their
suitability for a clustered environment, and it's up to the user
to determine whether a given sysctl will work properly in a
Service.
type: "object"
additionalProperties:
type: "string"
# This option is not used by Windows containers
CapabilityAdd:
type: "array"
description: |
A list of kernel capabilities to add to the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
- "CAP_SYS_ADMIN"
- "CAP_SYS_CHROOT"
- "CAP_SYSLOG"
CapabilityDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
Ulimits:
description: |
A list of resource limits to set in the container. For example: `{"Name": "nofile", "Soft": 1024, "Hard": 2048}`"
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
NetworkAttachmentSpec:
description: |
Read-only spec type for non-swarm containers attached to swarm overlay
networks.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
type: "object"
properties:
ContainerID:
description: "ID of the container represented by this task"
type: "string"
Resources:
description: |
Resource requirements which apply to each individual container created
as part of the service.
type: "object"
properties:
Limits:
description: "Define resources limits."
$ref: "#/definitions/Limit"
Reservation:
description: "Define resources reservation."
$ref: "#/definitions/ResourceObject"
RestartPolicy:
description: |
Specification for the restart policy which applies to containers
created as part of this service.
type: "object"
properties:
Condition:
description: "Condition for restart."
type: "string"
enum:
- "none"
- "on-failure"
- "any"
Delay:
description: "Delay between restart attempts."
type: "integer"
format: "int64"
MaxAttempts:
description: |
Maximum attempts to restart a given container before giving up
(default value is 0, which is ignored).
type: "integer"
format: "int64"
default: 0
Window:
description: |
Windows is the time window used to evaluate the restart policy
(default value is 0, which is unbounded).
type: "integer"
format: "int64"
default: 0
Placement:
type: "object"
properties:
Constraints:
description: |
An array of constraint expressions to limit the set of nodes where
a task can be scheduled. Constraint expressions can either use a
_match_ (`==`) or _exclude_ (`!=`) rule. Multiple constraints find
nodes that satisfy every expression (AND match). Constraints can
match node or Docker Engine labels as follows:
node attribute | matches | example
---------------------|--------------------------------|-----------------------------------------------
`node.id` | Node ID | `node.id==2ivku8v2gvtg4`
`node.hostname` | Node hostname | `node.hostname!=node-2`
`node.role` | Node role (`manager`/`worker`) | `node.role==manager`
`node.platform.os` | Node operating system | `node.platform.os==windows`
`node.platform.arch` | Node architecture | `node.platform.arch==x86_64`
`node.labels` | User-defined node labels | `node.labels.security==high`
`engine.labels` | Docker Engine's labels | `engine.labels.operatingsystem==ubuntu-14.04`
`engine.labels` apply to Docker Engine labels like operating system,
drivers, etc. Swarm administrators add `node.labels` for operational
purposes by using the [`node update endpoint`](#operation/NodeUpdate).
type: "array"
items:
type: "string"
example:
- "node.hostname!=node3.corp.example.com"
- "node.role!=manager"
- "node.labels.type==production"
- "node.platform.os==linux"
- "node.platform.arch==x86_64"
Preferences:
description: |
Preferences provide a way to make the scheduler aware of factors
such as topology. They are provided in order from highest to
lowest precedence.
type: "array"
items:
type: "object"
properties:
Spread:
type: "object"
properties:
SpreadDescriptor:
description: |
label descriptor, such as `engine.labels.az`.
type: "string"
example:
- Spread:
SpreadDescriptor: "node.labels.datacenter"
- Spread:
SpreadDescriptor: "node.labels.rack"
MaxReplicas:
description: |
Maximum number of replicas for per node (default value is 0, which
is unlimited)
type: "integer"
format: "int64"
default: 0
Platforms:
description: |
Platforms stores all the platforms that the service's image can
run on. This field is used in the platform filter for scheduling.
If empty, then the platform filter is off, meaning there are no
scheduling restrictions.
type: "array"
items:
$ref: "#/definitions/Platform"
ForceUpdate:
description: |
A counter that triggers an update even if no relevant parameters have
been changed.
type: "integer"
Runtime:
description: |
Runtime is the type of runtime specified for the task executor.
type: "string"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
LogDriver:
description: |
Specifies the log driver to use for tasks created from this spec. If
not present, the default one for the swarm will be used, finally
falling back to the engine default if not specified.
type: "object"
properties:
Name:
type: "string"
Options:
type: "object"
additionalProperties:
type: "string"
TaskState:
type: "string"
enum:
- "new"
- "allocated"
- "pending"
- "assigned"
- "accepted"
- "preparing"
- "ready"
- "starting"
- "running"
- "complete"
- "shutdown"
- "failed"
- "rejected"
- "remove"
- "orphaned"
Task:
type: "object"
properties:
ID:
description: "The ID of the task."
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Name:
description: "Name of the task."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Spec:
$ref: "#/definitions/TaskSpec"
ServiceID:
description: "The ID of the service this task is part of."
type: "string"
Slot:
type: "integer"
NodeID:
description: "The ID of the node that this task is on."
type: "string"
AssignedGenericResources:
$ref: "#/definitions/GenericResources"
Status:
type: "object"
properties:
Timestamp:
type: "string"
format: "dateTime"
State:
$ref: "#/definitions/TaskState"
Message:
type: "string"
Err:
type: "string"
ContainerStatus:
type: "object"
properties:
ContainerID:
type: "string"
PID:
type: "integer"
ExitCode:
type: "integer"
DesiredState:
$ref: "#/definitions/TaskState"
JobIteration:
description: |
If the Service this Task belongs to is a job-mode service, contains
the JobIteration of the Service this Task was created for. Absent if
the Task was created for a Replicated or Global Service.
$ref: "#/definitions/ObjectVersion"
example:
ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
AssignedGenericResources:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
ServiceSpec:
description: "User modifiable configuration for a service."
type: object
properties:
Name:
description: "Name of the service."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
TaskTemplate:
$ref: "#/definitions/TaskSpec"
Mode:
description: "Scheduling mode for the service."
type: "object"
properties:
Replicated:
type: "object"
properties:
Replicas:
type: "integer"
format: "int64"
Global:
type: "object"
ReplicatedJob:
description: |
The mode used for services with a finite number of tasks that run
to a completed state.
type: "object"
properties:
MaxConcurrent:
description: |
The maximum number of replicas to run simultaneously.
type: "integer"
format: "int64"
default: 1
TotalCompletions:
description: |
The total number of replicas desired to reach the Completed
state. If unset, will default to the value of `MaxConcurrent`
type: "integer"
format: "int64"
GlobalJob:
description: |
The mode used for services which run a task to the completed state
on each valid node.
type: "object"
UpdateConfig:
description: "Specification for the update strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be updated in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: "Amount of time between updates, in nanoseconds."
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an updated task fails to run, or stops running
during the update.
type: "string"
enum:
- "continue"
- "pause"
- "rollback"
Monitor:
description: |
Amount of time to monitor each updated task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during an update before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling out an updated task. Either
the old task is shut down before the new task is started, or the
new task is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
RollbackConfig:
description: "Specification for the rollback strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be rolled back in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: |
Amount of time between rollback iterations, in nanoseconds.
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an rolled back task fails to run, or stops
running during the rollback.
type: "string"
enum:
- "continue"
- "pause"
Monitor:
description: |
Amount of time to monitor each rolled back task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during a rollback before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling back a task. Either the old
task is shut down before the new task is started, or the new task
is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
EndpointSpec:
$ref: "#/definitions/EndpointSpec"
EndpointPortConfig:
type: "object"
properties:
Name:
type: "string"
Protocol:
type: "string"
enum:
- "tcp"
- "udp"
- "sctp"
TargetPort:
description: "The port inside the container."
type: "integer"
PublishedPort:
description: "The port on the swarm hosts."
type: "integer"
PublishMode:
description: |
The mode in which port is published.
<p><br /></p>
- "ingress" makes the target port accessible on every node,
regardless of whether there is a task for the service running on
that node or not.
- "host" bypasses the routing mesh and publish the port directly on
the swarm node where that service is running.
type: "string"
enum:
- "ingress"
- "host"
default: "ingress"
example: "ingress"
EndpointSpec:
description: "Properties that can be configured to access and load balance a service."
type: "object"
properties:
Mode:
description: |
The mode of resolution to use for internal load balancing between tasks.
type: "string"
enum:
- "vip"
- "dnsrr"
default: "vip"
Ports:
description: |
List of exposed ports that this service is accessible on from the
outside. Ports can only be provided if `vip` resolution mode is used.
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
Service:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ServiceSpec"
Endpoint:
type: "object"
properties:
Spec:
$ref: "#/definitions/EndpointSpec"
Ports:
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
VirtualIPs:
type: "array"
items:
type: "object"
properties:
NetworkID:
type: "string"
Addr:
type: "string"
UpdateStatus:
description: "The status of a service update."
type: "object"
properties:
State:
type: "string"
enum:
- "updating"
- "paused"
- "completed"
StartedAt:
type: "string"
format: "dateTime"
CompletedAt:
type: "string"
format: "dateTime"
Message:
type: "string"
ServiceStatus:
description: |
The status of the service's tasks. Provided only when requested as
part of a ServiceList operation.
type: "object"
properties:
RunningTasks:
description: |
The number of tasks for the service currently in the Running state.
type: "integer"
format: "uint64"
example: 7
DesiredTasks:
description: |
The number of tasks for the service desired to be running.
For replicated services, this is the replica count from the
service spec. For global services, this is computed by taking
count of all tasks for the service with a Desired State other
than Shutdown.
type: "integer"
format: "uint64"
example: 10
CompletedTasks:
description: |
The number of tasks for a job that are in the Completed state.
This field must be cross-referenced with the service type, as the
value of 0 may mean the service is not in a job mode, or it may
mean the job-mode service has no tasks yet Completed.
type: "integer"
format: "uint64"
JobStatus:
description: |
The status of the service when it is in one of ReplicatedJob or
GlobalJob modes. Absent on Replicated and Global mode services. The
JobIteration is an ObjectVersion, but unlike the Service's version,
does not need to be sent with an update request.
type: "object"
properties:
JobIteration:
description: |
JobIteration is a value increased each time a Job is executed,
successfully or otherwise. "Executed", in this case, means the
job as a whole has been started, not that an individual Task has
been launched. A job is "Executed" when its ServiceSpec is
updated. JobIteration can be used to disambiguate Tasks belonging
to different executions of a job. Though JobIteration will
increase with each subsequent execution, it may not necessarily
increase by 1, and so JobIteration should not be used to
$ref: "#/definitions/ObjectVersion"
LastExecution:
description: |
The last time, as observed by the server, that this job was
started.
type: "string"
format: "dateTime"
example:
ID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Version:
Index: 19
CreatedAt: "2016-06-07T21:05:51.880065305Z"
UpdatedAt: "2016-06-07T21:07:29.962229872Z"
Spec:
Name: "hopeful_cori"
TaskTemplate:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Endpoint:
Spec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
VirtualIPs:
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.2/16"
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.3/16"
ImageDeleteResponseItem:
type: "object"
properties:
Untagged:
description: "The image ID of an image that was untagged"
type: "string"
Deleted:
description: "The image ID of an image that was deleted"
type: "string"
ServiceUpdateResponse:
type: "object"
properties:
Warnings:
description: "Optional warning messages"
type: "array"
items:
type: "string"
example:
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
ContainerSummary:
type: "object"
properties:
Id:
description: "The ID of this container"
type: "string"
x-go-name: "ID"
Names:
description: "The names that this container has been given"
type: "array"
items:
type: "string"
Image:
description: "The name of the image used when creating this container"
type: "string"
ImageID:
description: "The ID of the image that this container was created from"
type: "string"
Command:
description: "Command to run when starting the container"
type: "string"
Created:
description: "When the container was created"
type: "integer"
format: "int64"
Ports:
description: "The ports exposed by this container"
type: "array"
items:
$ref: "#/definitions/Port"
SizeRw:
description: "The size of files that have been created or changed by this container"
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container"
type: "integer"
format: "int64"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
State:
description: "The state of this container (e.g. `Exited`)"
type: "string"
Status:
description: "Additional human-readable status of this container (e.g. `Exit 0`)"
type: "string"
HostConfig:
type: "object"
properties:
NetworkMode:
type: "string"
NetworkSettings:
description: "A summary of the container's network settings"
type: "object"
properties:
Networks:
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Driver:
description: "Driver represents a driver (network, logging, secrets)."
type: "object"
required: [Name]
properties:
Name:
description: "Name of the driver."
type: "string"
x-nullable: false
example: "some-driver"
Options:
description: "Key/value map of driver-specific options."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
OptionA: "value for driver-specific option A"
OptionB: "value for driver-specific option B"
SecretSpec:
type: "object"
properties:
Name:
description: "User-defined name of the secret."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
data to store as secret.
This field is only used to _create_ a secret, and is not returned by
other endpoints.
type: "string"
example: ""
Driver:
description: |
Name of the secrets driver used to fetch the secret's value from an
external secret store.
$ref: "#/definitions/Driver"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Secret:
type: "object"
properties:
ID:
type: "string"
example: "blt1owaxmitz71s9v5zh81zun"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
UpdatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
Spec:
$ref: "#/definitions/SecretSpec"
ConfigSpec:
type: "object"
properties:
Name:
description: "User-defined name of the config."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
config data.
type: "string"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Config:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ConfigSpec"
ContainerState:
description: |
ContainerState stores container's running state. It's part of ContainerJSONBase
and will be returned by the "inspect" command.
type: "object"
x-nullable: true
properties:
Status:
description: |
String representation of the container state. Can be one of "created",
"running", "paused", "restarting", "removing", "exited", or "dead".
type: "string"
enum: ["created", "running", "paused", "restarting", "removing", "exited", "dead"]
example: "running"
Running:
description: |
Whether this container is running.
Note that a running container can be _paused_. The `Running` and `Paused`
booleans are not mutually exclusive:
When pausing a container (on Linux), the freezer cgroup is used to suspend
all processes in the container. Freezing the process requires the process to
be running. As a result, paused containers are both `Running` _and_ `Paused`.
Use the `Status` field instead to determine if a container's state is "running".
type: "boolean"
example: true
Paused:
description: "Whether this container is paused."
type: "boolean"
example: false
Restarting:
description: "Whether this container is restarting."
type: "boolean"
example: false
OOMKilled:
description: |
Whether this container has been killed because it ran out of memory.
type: "boolean"
example: false
Dead:
type: "boolean"
example: false
Pid:
description: "The process ID of this container"
type: "integer"
example: 1234
ExitCode:
description: "The last exit code of this container"
type: "integer"
example: 0
Error:
type: "string"
StartedAt:
description: "The time when this container was last started."
type: "string"
example: "2020-01-06T09:06:59.461876391Z"
FinishedAt:
description: "The time when this container last exited."
type: "string"
example: "2020-01-06T09:07:59.461876391Z"
Health:
$ref: "#/definitions/Health"
ContainerCreateResponse:
description: "OK response to ContainerCreate operation"
type: "object"
title: "ContainerCreateResponse"
x-go-name: "CreateResponse"
required: [Id, Warnings]
properties:
Id:
description: "The ID of the created container"
type: "string"
x-nullable: false
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Warnings:
description: "Warnings encountered when creating the container"
type: "array"
x-nullable: false
items:
type: "string"
example: []
ContainerWaitResponse:
description: "OK response to ContainerWait operation"
type: "object"
x-go-name: "WaitResponse"
title: "ContainerWaitResponse"
required: [StatusCode, Error]
properties:
StatusCode:
description: "Exit code of the container"
type: "integer"
x-nullable: false
Error:
$ref: "#/definitions/ContainerWaitExitError"
ContainerWaitExitError:
description: "container waiting error, if any"
type: "object"
x-go-name: "WaitExitError"
properties:
Message:
description: "Details of an error"
type: "string"
SystemVersion:
type: "object"
description: |
Response of Engine API: GET "/version"
properties:
Platform:
type: "object"
required: [Name]
properties:
Name:
type: "string"
Components:
type: "array"
description: |
Information about system components
items:
type: "object"
x-go-name: ComponentVersion
required: [Name, Version]
properties:
Name:
description: |
Name of the component
type: "string"
example: "Engine"
Version:
description: |
Version of the component
type: "string"
x-nullable: false
example: "19.03.12"
Details:
description: |
Key/value pairs of strings with additional information about the
component. These values are intended for informational purposes
only, and their content is not defined, and not part of the API
specification.
These messages can be printed by the client as information to the user.
type: "object"
x-nullable: true
Version:
description: "The version of the daemon"
type: "string"
example: "19.03.12"
ApiVersion:
description: |
The default (and highest) API version that is supported by the daemon
type: "string"
example: "1.40"
MinAPIVersion:
description: |
The minimum API version that is supported by the daemon
type: "string"
example: "1.12"
GitCommit:
description: |
The Git commit of the source code that was used to build the daemon
type: "string"
example: "48a66213fe"
GoVersion:
description: |
The version Go used to compile the daemon, and the version of the Go
runtime in use.
type: "string"
example: "go1.13.14"
Os:
description: |
The operating system that the daemon is running on ("linux" or "windows")
type: "string"
example: "linux"
Arch:
description: |
The architecture that the daemon is running on
type: "string"
example: "amd64"
KernelVersion:
description: |
The kernel version (`uname -r`) that the daemon is running on.
This field is omitted when empty.
type: "string"
example: "4.19.76-linuxkit"
Experimental:
description: |
Indicates if the daemon is started with experimental features enabled.
This field is omitted when empty / false.
type: "boolean"
example: true
BuildTime:
description: |
The date and time that the daemon was compiled.
type: "string"
example: "2020-06-22T15:49:27.000000000+00:00"
SystemInfo:
type: "object"
properties:
ID:
description: |
Unique identifier of the daemon.
<p><br /></p>
> **Note**: The format of the ID itself is not part of the API, and
> should not be considered stable.
type: "string"
example: "7TRN:IPZB:QYBB:VPBQ:UMPP:KARE:6ZNR:XE6T:7EWV:PKF4:ZOJD:TPYS"
Containers:
description: "Total number of containers on the host."
type: "integer"
example: 14
ContainersRunning:
description: |
Number of containers with status `"running"`.
type: "integer"
example: 3
ContainersPaused:
description: |
Number of containers with status `"paused"`.
type: "integer"
example: 1
ContainersStopped:
description: |
Number of containers with status `"stopped"`.
type: "integer"
example: 10
Images:
description: |
Total number of images on the host.
Both _tagged_ and _untagged_ (dangling) images are counted.
type: "integer"
example: 508
Driver:
description: "Name of the storage driver in use."
type: "string"
example: "overlay2"
DriverStatus:
description: |
Information specific to the storage driver, provided as
"label" / "value" pairs.
This information is provided by the storage driver, and formatted
in a way consistent with the output of `docker info` on the command
line.
<p><br /></p>
> **Note**: The information returned in this field, including the
> formatting of values and labels, should not be considered stable,
> and may change without notice.
type: "array"
items:
type: "array"
items:
type: "string"
example:
- ["Backing Filesystem", "extfs"]
- ["Supports d_type", "true"]
- ["Native Overlay Diff", "true"]
DockerRootDir:
description: |
Root directory of persistent Docker state.
Defaults to `/var/lib/docker` on Linux, and `C:\ProgramData\docker`
on Windows.
type: "string"
example: "/var/lib/docker"
Plugins:
$ref: "#/definitions/PluginsInfo"
MemoryLimit:
description: "Indicates if the host has memory limit support enabled."
type: "boolean"
example: true
SwapLimit:
description: "Indicates if the host has memory swap limit support enabled."
type: "boolean"
example: true
KernelMemoryTCP:
description: |
Indicates if the host has kernel memory TCP limit support enabled. This
field is omitted if not supported.
Kernel memory TCP limits are not supported when using cgroups v2, which
does not support the corresponding `memory.kmem.tcp.limit_in_bytes` cgroup.
type: "boolean"
example: true
CpuCfsPeriod:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) period is supported by
the host.
type: "boolean"
example: true
CpuCfsQuota:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) quota is supported by
the host.
type: "boolean"
example: true
CPUShares:
description: |
Indicates if CPU Shares limiting is supported by the host.
type: "boolean"
example: true
CPUSet:
description: |
Indicates if CPUsets (cpuset.cpus, cpuset.mems) are supported by the host.
See [cpuset(7)](https://www.kernel.org/doc/Documentation/cgroup-v1/cpusets.txt)
type: "boolean"
example: true
PidsLimit:
description: "Indicates if the host kernel has PID limit support enabled."
type: "boolean"
example: true
OomKillDisable:
description: "Indicates if OOM killer disable is supported on the host."
type: "boolean"
IPv4Forwarding:
description: "Indicates IPv4 forwarding is enabled."
type: "boolean"
example: true
BridgeNfIptables:
description: "Indicates if `bridge-nf-call-iptables` is available on the host."
type: "boolean"
example: true
BridgeNfIp6tables:
description: "Indicates if `bridge-nf-call-ip6tables` is available on the host."
type: "boolean"
example: true
Debug:
description: |
Indicates if the daemon is running in debug-mode / with debug-level
logging enabled.
type: "boolean"
example: true
NFd:
description: |
The total number of file Descriptors in use by the daemon process.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 64
NGoroutines:
description: |
The number of goroutines that currently exist.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 174
SystemTime:
description: |
Current system-time in [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt)
format with nano-seconds.
type: "string"
example: "2017-08-08T20:28:29.06202363Z"
LoggingDriver:
description: |
The logging driver to use as a default for new containers.
type: "string"
CgroupDriver:
description: |
The driver to use for managing cgroups.
type: "string"
enum: ["cgroupfs", "systemd", "none"]
default: "cgroupfs"
example: "cgroupfs"
CgroupVersion:
description: |
The version of the cgroup.
type: "string"
enum: ["1", "2"]
default: "1"
example: "1"
NEventsListener:
description: "Number of event listeners subscribed."
type: "integer"
example: 30
KernelVersion:
description: |
Kernel version of the host.
On Linux, this information obtained from `uname`. On Windows this
information is queried from the <kbd>HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\</kbd>
registry value, for example _"10.0 14393 (14393.1198.amd64fre.rs1_release_sec.170427-1353)"_.
type: "string"
example: "4.9.38-moby"
OperatingSystem:
description: |
Name of the host's operating system, for example: "Ubuntu 16.04.2 LTS"
or "Windows Server 2016 Datacenter"
type: "string"
example: "Alpine Linux v3.5"
OSVersion:
description: |
Version of the host's operating system
<p><br /></p>
> **Note**: The information returned in this field, including its
> very existence, and the formatting of values, should not be considered
> stable, and may change without notice.
type: "string"
example: "16.04"
OSType:
description: |
Generic type of the operating system of the host, as returned by the
Go runtime (`GOOS`).
Currently returned values are "linux" and "windows". A full list of
possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "linux"
Architecture:
description: |
Hardware architecture of the host, as returned by the Go runtime
(`GOARCH`).
A full list of possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "x86_64"
NCPU:
description: |
The number of logical CPUs usable by the daemon.
The number of available CPUs is checked by querying the operating
system when the daemon starts. Changes to operating system CPU
allocation after the daemon is started are not reflected.
type: "integer"
example: 4
MemTotal:
description: |
Total amount of physical memory available on the host, in bytes.
type: "integer"
format: "int64"
example: 2095882240
IndexServerAddress:
description: |
Address / URL of the index server that is used for image search,
and as a default for user authentication for Docker Hub and Docker Cloud.
default: "https://index.docker.io/v1/"
type: "string"
example: "https://index.docker.io/v1/"
RegistryConfig:
$ref: "#/definitions/RegistryServiceConfig"
GenericResources:
$ref: "#/definitions/GenericResources"
HttpProxy:
description: |
HTTP-proxy configured for the daemon. This value is obtained from the
[`HTTP_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "http://xxxxx:[email protected]:8080"
HttpsProxy:
description: |
HTTPS-proxy configured for the daemon. This value is obtained from the
[`HTTPS_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "https://xxxxx:[email protected]:4443"
NoProxy:
description: |
Comma-separated list of domain extensions for which no proxy should be
used. This value is obtained from the [`NO_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html)
environment variable.
Containers do not automatically inherit this configuration.
type: "string"
example: "*.local, 169.254/16"
Name:
description: "Hostname of the host."
type: "string"
example: "node5.corp.example.com"
Labels:
description: |
User-defined labels (key/value metadata) as set on the daemon.
<p><br /></p>
> **Note**: When part of a Swarm, nodes can both have _daemon_ labels,
> set through the daemon configuration, and _node_ labels, set from a
> manager node in the Swarm. Node labels are not included in this
> field. Node labels can be retrieved using the `/nodes/(id)` endpoint
> on a manager node in the Swarm.
type: "array"
items:
type: "string"
example: ["storage=ssd", "production"]
ExperimentalBuild:
description: |
Indicates if experimental features are enabled on the daemon.
type: "boolean"
example: true
ServerVersion:
description: |
Version string of the daemon.
> **Note**: the [standalone Swarm API](https://docs.docker.com/swarm/swarm-api/)
> returns the Swarm version instead of the daemon version, for example
> `swarm/1.2.8`.
type: "string"
example: "17.06.0-ce"
ClusterStore:
description: |
URL of the distributed storage backend.
The storage backend is used for multihost networking (to store
network and endpoint information) and by the node discovery mechanism.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "consul://consul.corp.example.com:8600/some/path"
ClusterAdvertise:
description: |
The network endpoint that the Engine advertises for the purpose of
node discovery. ClusterAdvertise is a `host:port` combination on which
the daemon is reachable by other hosts.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "node5.corp.example.com:8000"
Runtimes:
description: |
List of [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtimes configured on the daemon. Keys hold the "name" used to
reference the runtime.
The Docker daemon relies on an OCI compliant runtime (invoked via the
`containerd` daemon) as its interface to the Linux kernel namespaces,
cgroups, and SELinux.
The default runtime is `runc`, and automatically configured. Additional
runtimes can be configured by the user and will be listed here.
type: "object"
additionalProperties:
$ref: "#/definitions/Runtime"
default:
runc:
path: "runc"
example:
runc:
path: "runc"
runc-master:
path: "/go/bin/runc"
custom:
path: "/usr/local/bin/my-oci-runtime"
runtimeArgs: ["--debug", "--systemd-cgroup=false"]
DefaultRuntime:
description: |
Name of the default OCI runtime that is used when starting containers.
The default can be overridden per-container at create time.
type: "string"
default: "runc"
example: "runc"
Swarm:
$ref: "#/definitions/SwarmInfo"
LiveRestoreEnabled:
description: |
Indicates if live restore is enabled.
If enabled, containers are kept running when the daemon is shutdown
or upon daemon start if running containers are detected.
type: "boolean"
default: false
example: false
Isolation:
description: |
Represents the isolation technology to use as a default for containers.
The supported values are platform-specific.
If no isolation value is specified on daemon start, on Windows client,
the default is `hyperv`, and on Windows server, the default is `process`.
This option is currently not used on other platforms.
default: "default"
type: "string"
enum:
- "default"
- "hyperv"
- "process"
InitBinary:
description: |
Name and, optional, path of the `docker-init` binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "docker-init"
ContainerdCommit:
$ref: "#/definitions/Commit"
RuncCommit:
$ref: "#/definitions/Commit"
InitCommit:
$ref: "#/definitions/Commit"
SecurityOptions:
description: |
List of security features that are enabled on the daemon, such as
apparmor, seccomp, SELinux, user-namespaces (userns), and rootless.
Additional configuration options for each security feature may
be present, and are included as a comma-separated list of key/value
pairs.
type: "array"
items:
type: "string"
example:
- "name=apparmor"
- "name=seccomp,profile=default"
- "name=selinux"
- "name=userns"
- "name=rootless"
ProductLicense:
description: |
Reports a summary of the product license on the daemon.
If a commercial license has been applied to the daemon, information
such as number of nodes, and expiration are included.
type: "string"
example: "Community Engine"
DefaultAddressPools:
description: |
List of custom default address pools for local networks, which can be
specified in the daemon.json file or dockerd option.
Example: a Base "10.10.0.0/16" with Size 24 will define the set of 256
10.10.[0-255].0/24 address pools.
type: "array"
items:
type: "object"
properties:
Base:
description: "The network address in CIDR format"
type: "string"
example: "10.10.0.0/16"
Size:
description: "The network pool size"
type: "integer"
example: "24"
Warnings:
description: |
List of warnings / informational messages about missing features, or
issues related to the daemon configuration.
These messages can be printed by the client as information to the user.
type: "array"
items:
type: "string"
example:
- "WARNING: No memory limit support"
- "WARNING: bridge-nf-call-iptables is disabled"
- "WARNING: bridge-nf-call-ip6tables is disabled"
# PluginsInfo is a temp struct holding Plugins name
# registered with docker daemon. It is used by Info struct
PluginsInfo:
description: |
Available plugins per type.
<p><br /></p>
> **Note**: Only unmanaged (V1) plugins are included in this list.
> V1 plugins are "lazily" loaded, and are not returned in this list
> if there is no resource using the plugin.
type: "object"
properties:
Volume:
description: "Names of available volume-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["local"]
Network:
description: "Names of available network-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["bridge", "host", "ipvlan", "macvlan", "null", "overlay"]
Authorization:
description: "Names of available authorization plugins."
type: "array"
items:
type: "string"
example: ["img-authz-plugin", "hbm"]
Log:
description: "Names of available logging-drivers, and logging-driver plugins."
type: "array"
items:
type: "string"
example: ["awslogs", "fluentd", "gcplogs", "gelf", "journald", "json-file", "logentries", "splunk", "syslog"]
RegistryServiceConfig:
description: |
RegistryServiceConfig stores daemon registry services configuration.
type: "object"
x-nullable: true
properties:
AllowNondistributableArtifactsCIDRs:
description: |
List of IP ranges to which nondistributable artifacts can be pushed,
using the CIDR syntax [RFC 4632](https://tools.ietf.org/html/4632).
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior, and enables the daemon to
push nondistributable artifacts to all registries whose resolved IP
address is within the subnet described by the CIDR syntax.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
AllowNondistributableArtifactsHostnames:
description: |
List of registry hostnames to which nondistributable artifacts can be
pushed, using the format `<hostname>[:<port>]` or `<IP address>[:<port>]`.
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior for the specified
registries.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["registry.internal.corp.example.com:3000", "[2001:db8:a0b:12f0::1]:443"]
InsecureRegistryCIDRs:
description: |
List of IP ranges of insecure registries, using the CIDR syntax
([RFC 4632](https://tools.ietf.org/html/4632)). Insecure registries
accept un-encrypted (HTTP) and/or untrusted (HTTPS with certificates
from unknown CAs) communication.
By default, local registries (`127.0.0.0/8`) are configured as
insecure. All other registries are secure. Communicating with an
insecure registry is not possible if the daemon assumes that registry
is secure.
This configuration override this behavior, insecure communication with
registries whose resolved IP address is within the subnet described by
the CIDR syntax.
Registries can also be marked insecure by hostname. Those registries
are listed under `IndexConfigs` and have their `Secure` field set to
`false`.
> **Warning**: Using this option can be useful when running a local
> registry, but introduces security vulnerabilities. This option
> should therefore ONLY be used for testing purposes. For increased
> security, users should add their CA to their system's list of trusted
> CAs instead of enabling this option.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
IndexConfigs:
type: "object"
additionalProperties:
$ref: "#/definitions/IndexInfo"
example:
"127.0.0.1:5000":
"Name": "127.0.0.1:5000"
"Mirrors": []
"Secure": false
"Official": false
"[2001:db8:a0b:12f0::1]:80":
"Name": "[2001:db8:a0b:12f0::1]:80"
"Mirrors": []
"Secure": false
"Official": false
"docker.io":
Name: "docker.io"
Mirrors: ["https://hub-mirror.corp.example.com:5000/"]
Secure: true
Official: true
"registry.internal.corp.example.com:3000":
Name: "registry.internal.corp.example.com:3000"
Mirrors: []
Secure: false
Official: false
Mirrors:
description: |
List of registry URLs that act as a mirror for the official
(`docker.io`) registry.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://[2001:db8:a0b:12f0::1]/"
IndexInfo:
description:
IndexInfo contains information about a registry.
type: "object"
x-nullable: true
properties:
Name:
description: |
Name of the registry, such as "docker.io".
type: "string"
example: "docker.io"
Mirrors:
description: |
List of mirrors, expressed as URIs.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://registry-2.docker.io/"
- "https://registry-3.docker.io/"
Secure:
description: |
Indicates if the registry is part of the list of insecure
registries.
If `false`, the registry is insecure. Insecure registries accept
un-encrypted (HTTP) and/or untrusted (HTTPS with certificates from
unknown CAs) communication.
> **Warning**: Insecure registries can be useful when running a local
> registry. However, because its use creates security vulnerabilities
> it should ONLY be enabled for testing purposes. For increased
> security, users should add their CA to their system's list of
> trusted CAs instead of enabling this option.
type: "boolean"
example: true
Official:
description: |
Indicates whether this is an official registry (i.e., Docker Hub / docker.io)
type: "boolean"
example: true
Runtime:
description: |
Runtime describes an [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtime.
The runtime is invoked by the daemon via the `containerd` daemon. OCI
runtimes act as an interface to the Linux kernel namespaces, cgroups,
and SELinux.
type: "object"
properties:
path:
description: |
Name and, optional, path, of the OCI executable binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "/usr/local/bin/my-oci-runtime"
runtimeArgs:
description: |
List of command-line arguments to pass to the runtime when invoked.
type: "array"
x-nullable: true
items:
type: "string"
example: ["--debug", "--systemd-cgroup=false"]
Commit:
description: |
Commit holds the Git-commit (SHA1) that a binary was built from, as
reported in the version-string of external tools, such as `containerd`,
or `runC`.
type: "object"
properties:
ID:
description: "Actual commit ID of external tool."
type: "string"
example: "cfb82a876ecc11b5ca0977d1733adbe58599088a"
Expected:
description: |
Commit ID of external tool expected by dockerd as set at build time.
type: "string"
example: "2d41c047c83e09a6d61d464906feb2a2f3c52aa4"
SwarmInfo:
description: |
Represents generic information about swarm.
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
default: ""
example: "k67qz4598weg5unwwffg6z1m1"
NodeAddr:
description: |
IP address at which this node can be reached by other nodes in the
swarm.
type: "string"
default: ""
example: "10.0.0.46"
LocalNodeState:
$ref: "#/definitions/LocalNodeState"
ControlAvailable:
type: "boolean"
default: false
example: true
Error:
type: "string"
default: ""
RemoteManagers:
description: |
List of ID's and addresses of other managers in the swarm.
type: "array"
default: null
x-nullable: true
items:
$ref: "#/definitions/PeerNode"
example:
- NodeID: "71izy0goik036k48jg985xnds"
Addr: "10.0.0.158:2377"
- NodeID: "79y6h1o4gv8n120drcprv5nmc"
Addr: "10.0.0.159:2377"
- NodeID: "k67qz4598weg5unwwffg6z1m1"
Addr: "10.0.0.46:2377"
Nodes:
description: "Total number of nodes in the swarm."
type: "integer"
x-nullable: true
example: 4
Managers:
description: "Total number of managers in the swarm."
type: "integer"
x-nullable: true
example: 3
Cluster:
$ref: "#/definitions/ClusterInfo"
LocalNodeState:
description: "Current local status of this node."
type: "string"
default: ""
enum:
- ""
- "inactive"
- "pending"
- "active"
- "error"
- "locked"
example: "active"
PeerNode:
description: "Represents a peer-node in the swarm"
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
Addr:
description: |
IP address and ports at which this node can be reached.
type: "string"
NetworkAttachmentConfig:
description: |
Specifies how a service should be attached to a particular network.
type: "object"
properties:
Target:
description: |
The target network for attachment. Must be a network name or ID.
type: "string"
Aliases:
description: |
Discoverable alternate names for the service on this network.
type: "array"
items:
type: "string"
DriverOpts:
description: |
Driver attachment options for the network target.
type: "object"
additionalProperties:
type: "string"
EventActor:
description: |
Actor describes something that generates events, like a container, network,
or a volume.
type: "object"
properties:
ID:
description: "The ID of the object emitting the event"
type: "string"
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Attributes:
description: |
Various key/value attributes of the object, depending on its type.
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-label-value"
image: "alpine:latest"
name: "my-container"
EventMessage:
description: |
EventMessage represents the information an event contains.
type: "object"
title: "SystemEventsResponse"
properties:
Type:
description: "The type of object emitting the event"
type: "string"
enum: ["builder", "config", "container", "daemon", "image", "network", "node", "plugin", "secret", "service", "volume"]
example: "container"
Action:
description: "The type of event"
type: "string"
example: "create"
Actor:
$ref: "#/definitions/EventActor"
scope:
description: |
Scope of the event. Engine events are `local` scope. Cluster (Swarm)
events are `swarm` scope.
type: "string"
enum: ["local", "swarm"]
time:
description: "Timestamp of event"
type: "integer"
format: "int64"
example: 1629574695
timeNano:
description: "Timestamp of event, with nanosecond accuracy"
type: "integer"
format: "int64"
example: 1629574695515050031
OCIDescriptor:
type: "object"
x-go-name: Descriptor
description: |
A descriptor struct containing digest, media type, and size, as defined in
the [OCI Content Descriptors Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/descriptor.md).
properties:
mediaType:
description: |
The media type of the object this schema refers to.
type: "string"
example: "application/vnd.docker.distribution.manifest.v2+json"
digest:
description: |
The digest of the targeted content.
type: "string"
example: "sha256:c0537ff6a5218ef531ece93d4984efc99bbf3f7497c0a7726c88e2bb7584dc96"
size:
description: |
The size in bytes of the blob.
type: "integer"
format: "int64"
example: 3987495
# TODO Not yet including these fields for now, as they are nil / omitted in our response.
# urls:
# description: |
# List of URLs from which this object MAY be downloaded.
# type: "array"
# items:
# type: "string"
# format: "uri"
# annotations:
# description: |
# Arbitrary metadata relating to the targeted content.
# type: "object"
# additionalProperties:
# type: "string"
# platform:
# $ref: "#/definitions/OCIPlatform"
OCIPlatform:
type: "object"
x-go-name: Platform
description: |
Describes the platform which the image in the manifest runs on, as defined
in the [OCI Image Index Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/image-index.md).
properties:
architecture:
description: |
The CPU architecture, for example `amd64` or `ppc64`.
type: "string"
example: "arm"
os:
description: |
The operating system, for example `linux` or `windows`.
type: "string"
example: "windows"
os.version:
description: |
Optional field specifying the operating system version, for example on
Windows `10.0.19041.1165`.
type: "string"
example: "10.0.19041.1165"
os.features:
description: |
Optional field specifying an array of strings, each listing a required
OS feature (for example on Windows `win32k`).
type: "array"
items:
type: "string"
example:
- "win32k"
variant:
description: |
Optional field specifying a variant of the CPU, for example `v7` to
specify ARMv7 when architecture is `arm`.
type: "string"
example: "v7"
DistributionInspect:
type: "object"
x-go-name: DistributionInspect
title: "DistributionInspectResponse"
required: [Descriptor, Platforms]
description: |
Describes the result obtained from contacting the registry to retrieve
image metadata.
properties:
Descriptor:
$ref: "#/definitions/OCIDescriptor"
Platforms:
type: "array"
description: |
An array containing all platforms supported by the image.
items:
$ref: "#/definitions/OCIPlatform"
paths:
/containers/json:
get:
summary: "List containers"
description: |
Returns a list of containers. For details on the format, see the
[inspect endpoint](#operation/ContainerInspect).
Note that it uses a different, smaller representation of a container
than inspecting a single container. For example, the list of linked
containers is not propagated .
operationId: "ContainerList"
produces:
- "application/json"
parameters:
- name: "all"
in: "query"
description: |
Return all containers. By default, only running containers are shown.
type: "boolean"
default: false
- name: "limit"
in: "query"
description: |
Return this number of most recently created containers, including
non-running ones.
type: "integer"
- name: "size"
in: "query"
description: |
Return the size of container as fields `SizeRw` and `SizeRootFs`.
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
Filters to process on the container list, encoded as JSON (a
`map[string][]string`). For example, `{"status": ["paused"]}` will
only return paused containers.
Available filters:
- `ancestor`=(`<image-name>[:<tag>]`, `<image id>`, or `<image@digest>`)
- `before`=(`<container id>` or `<container name>`)
- `expose`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `exited=<int>` containers with exit code of `<int>`
- `health`=(`starting`|`healthy`|`unhealthy`|`none`)
- `id=<ID>` a container's ID
- `isolation=`(`default`|`process`|`hyperv`) (Windows daemon only)
- `is-task=`(`true`|`false`)
- `label=key` or `label="key=value"` of a container label
- `name=<name>` a container's name
- `network`=(`<network id>` or `<network name>`)
- `publish`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `since`=(`<container id>` or `<container name>`)
- `status=`(`created`|`restarting`|`running`|`removing`|`paused`|`exited`|`dead`)
- `volume`=(`<volume name>` or `<mount point destination>`)
type: "string"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
examples:
application/json:
- Id: "8dfafdbc3a40"
Names:
- "/boring_feynman"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 1"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports:
- PrivatePort: 2222
PublicPort: 3333
Type: "tcp"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "2cdc4edb1ded3631c81f57966563e5c8525b81121bb3706a9a9a3ae102711f3f"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:02"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
- Id: "9cd87474be90"
Names:
- "/coolName"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 222222"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "88eaed7b37b38c2a3f0c4bc796494fdf51b270c2d22656412a2ca5d559a64d7a"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.8"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:08"
Mounts: []
- Id: "3176a2479c92"
Names:
- "/sleepy_dog"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 3333333333333333"
Created: 1367854154
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "8b27c041c30326d59cd6e6f510d4f8d1d570a228466f956edf7815508f78e30d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.6"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:06"
Mounts: []
- Id: "4cb07b47f9fb"
Names:
- "/running_cat"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 444444444444444444444444444444444"
Created: 1367854152
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "d91c7b2f0644403d7ef3095985ea0e2370325cd2332ff3a3225c4247328e66e9"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.5"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:05"
Mounts: []
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/create:
post:
summary: "Create a container"
operationId: "ContainerCreate"
consumes:
- "application/json"
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "name"
in: "query"
description: |
Assign the specified name to the container. Must match
`/?[a-zA-Z0-9][a-zA-Z0-9_.-]+`.
type: "string"
pattern: "^/?[a-zA-Z0-9][a-zA-Z0-9_.-]+$"
- name: "body"
in: "body"
description: "Container to create"
schema:
allOf:
- $ref: "#/definitions/ContainerConfig"
- type: "object"
properties:
HostConfig:
$ref: "#/definitions/HostConfig"
NetworkingConfig:
$ref: "#/definitions/NetworkingConfig"
example:
Hostname: ""
Domainname: ""
User: ""
AttachStdin: false
AttachStdout: true
AttachStderr: true
Tty: false
OpenStdin: false
StdinOnce: false
Env:
- "FOO=bar"
- "BAZ=quux"
Cmd:
- "date"
Entrypoint: ""
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
Volumes:
/volumes/data: {}
WorkingDir: ""
NetworkDisabled: false
MacAddress: "12:34:56:78:9a:bc"
ExposedPorts:
22/tcp: {}
StopSignal: "SIGTERM"
StopTimeout: 10
HostConfig:
Binds:
- "/tmp:/tmp"
Links:
- "redis3:redis"
Memory: 0
MemorySwap: 0
MemoryReservation: 0
NanoCpus: 500000
CpuPercent: 80
CpuShares: 512
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpuQuota: 50000
CpusetCpus: "0,1"
CpusetMems: "0,1"
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 300
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceWriteIOps:
- {}
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
MemorySwappiness: 60
OomKillDisable: false
OomScoreAdj: 500
PidMode: ""
PidsLimit: 0
PortBindings:
22/tcp:
- HostPort: "11022"
PublishAllPorts: false
Privileged: false
ReadonlyRootfs: false
Dns:
- "8.8.8.8"
DnsOptions:
- ""
DnsSearch:
- ""
VolumesFrom:
- "parent"
- "other:ro"
CapAdd:
- "NET_ADMIN"
CapDrop:
- "MKNOD"
GroupAdd:
- "newgroup"
RestartPolicy:
Name: ""
MaximumRetryCount: 0
AutoRemove: true
NetworkMode: "bridge"
Devices: []
Ulimits:
- {}
LogConfig:
Type: "json-file"
Config: {}
SecurityOpt: []
StorageOpt: {}
CgroupParent: ""
VolumeDriver: ""
ShmSize: 67108864
NetworkingConfig:
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
required: true
responses:
201:
description: "Container created successfully"
schema:
$ref: "#/definitions/ContainerCreateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/{id}/json:
get:
summary: "Inspect a container"
description: "Return low-level information about a container."
operationId: "ContainerInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerInspectResponse"
properties:
Id:
description: "The ID of the container"
type: "string"
Created:
description: "The time the container was created"
type: "string"
Path:
description: "The path to the command being run"
type: "string"
Args:
description: "The arguments to the command being run"
type: "array"
items:
type: "string"
State:
$ref: "#/definitions/ContainerState"
Image:
description: "The container's image ID"
type: "string"
ResolvConfPath:
type: "string"
HostnamePath:
type: "string"
HostsPath:
type: "string"
LogPath:
type: "string"
Name:
type: "string"
RestartCount:
type: "integer"
Driver:
type: "string"
Platform:
type: "string"
MountLabel:
type: "string"
ProcessLabel:
type: "string"
AppArmorProfile:
type: "string"
ExecIDs:
description: "IDs of exec instances that are running in the container."
type: "array"
items:
type: "string"
x-nullable: true
HostConfig:
$ref: "#/definitions/HostConfig"
GraphDriver:
$ref: "#/definitions/GraphDriverData"
SizeRw:
description: |
The size of files that have been created or changed by this
container.
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container."
type: "integer"
format: "int64"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Config:
$ref: "#/definitions/ContainerConfig"
NetworkSettings:
$ref: "#/definitions/NetworkSettings"
examples:
application/json:
AppArmorProfile: ""
Args:
- "-c"
- "exit 9"
Config:
AttachStderr: true
AttachStdin: false
AttachStdout: true
Cmd:
- "/bin/sh"
- "-c"
- "exit 9"
Domainname: ""
Env:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Healthcheck:
Test: ["CMD-SHELL", "exit 0"]
Hostname: "ba033ac44011"
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
MacAddress: ""
NetworkDisabled: false
OpenStdin: false
StdinOnce: false
Tty: false
User: ""
Volumes:
/volumes/data: {}
WorkingDir: ""
StopSignal: "SIGTERM"
StopTimeout: 10
Created: "2015-01-06T15:47:31.485331387Z"
Driver: "devicemapper"
ExecIDs:
- "b35395de42bc8abd327f9dd65d913b9ba28c74d2f0734eeeae84fa1c616a0fca"
- "3fc1232e5cd20c8de182ed81178503dc6437f4e7ef12b52cc5e8de020652f1c4"
HostConfig:
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 0
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteIOps:
- {}
ContainerIDFile: ""
CpusetCpus: ""
CpusetMems: ""
CpuPercent: 80
CpuShares: 0
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
Devices: []
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
IpcMode: ""
Memory: 0
MemorySwap: 0
MemoryReservation: 0
OomKillDisable: false
OomScoreAdj: 500
NetworkMode: "bridge"
PidMode: ""
PortBindings: {}
Privileged: false
ReadonlyRootfs: false
PublishAllPorts: false
RestartPolicy:
MaximumRetryCount: 2
Name: "on-failure"
LogConfig:
Type: "json-file"
Sysctls:
net.ipv4.ip_forward: "1"
Ulimits:
- {}
VolumeDriver: ""
ShmSize: 67108864
HostnamePath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hostname"
HostsPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hosts"
LogPath: "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b-json.log"
Id: "ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39"
Image: "04c5d3b7b0656168630d3ba35d8889bd0e9caafcaeb3004d2bfbc47e7c5d35d2"
MountLabel: ""
Name: "/boring_euclid"
NetworkSettings:
Bridge: ""
SandboxID: ""
HairpinMode: false
LinkLocalIPv6Address: ""
LinkLocalIPv6PrefixLen: 0
SandboxKey: ""
EndpointID: ""
Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
IPAddress: ""
IPPrefixLen: 0
IPv6Gateway: ""
MacAddress: ""
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "7587b82f0dada3656fda26588aee72630c6fab1536d36e394b2bfbcf898c971d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Path: "/bin/sh"
ProcessLabel: ""
ResolvConfPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/resolv.conf"
RestartCount: 1
State:
Error: ""
ExitCode: 9
FinishedAt: "2015-01-06T15:47:32.080254511Z"
Health:
Status: "healthy"
FailingStreak: 0
Log:
- Start: "2019-12-22T10:59:05.6385933Z"
End: "2019-12-22T10:59:05.8078452Z"
ExitCode: 0
Output: ""
OOMKilled: false
Dead: false
Paused: false
Pid: 0
Restarting: false
Running: true
StartedAt: "2015-01-06T15:47:32.072697474Z"
Status: "running"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "size"
in: "query"
type: "boolean"
default: false
description: "Return the size of container as fields `SizeRw` and `SizeRootFs`"
tags: ["Container"]
/containers/{id}/top:
get:
summary: "List processes running inside a container"
description: |
On Unix systems, this is done by running the `ps` command. This endpoint
is not supported on Windows.
operationId: "ContainerTop"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerTopResponse"
description: "OK response to ContainerTop operation"
properties:
Titles:
description: "The ps column titles"
type: "array"
items:
type: "string"
Processes:
description: |
Each process running in the container, where each is process
is an array of values corresponding to the titles.
type: "array"
items:
type: "array"
items:
type: "string"
examples:
application/json:
Titles:
- "UID"
- "PID"
- "PPID"
- "C"
- "STIME"
- "TTY"
- "TIME"
- "CMD"
Processes:
-
- "root"
- "13642"
- "882"
- "0"
- "17:03"
- "pts/0"
- "00:00:00"
- "/bin/bash"
-
- "root"
- "13735"
- "13642"
- "0"
- "17:06"
- "pts/0"
- "00:00:00"
- "sleep 10"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "ps_args"
in: "query"
description: "The arguments to pass to `ps`. For example, `aux`"
type: "string"
default: "-ef"
tags: ["Container"]
/containers/{id}/logs:
get:
summary: "Get container logs"
description: |
Get `stdout` and `stderr` logs from a container.
Note: This endpoint works only for containers with the `json-file` or
`journald` logging driver.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ContainerLogs"
responses:
200:
description: |
logs returned as a stream in response body.
For the stream format, [see the documentation for the attach endpoint](#operation/ContainerAttach).
Note that unlike the attach endpoint, the logs endpoint does not
upgrade the connection and does not set Content-Type.
schema:
type: "string"
format: "binary"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "until"
in: "query"
description: "Only return logs before this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Container"]
/containers/{id}/changes:
get:
summary: "Get changes on a container’s filesystem"
description: |
Returns which files in a container's filesystem have been added, deleted,
or modified. The `Kind` of modification can be one of:
- `0`: Modified
- `1`: Added
- `2`: Deleted
operationId: "ContainerChanges"
produces: ["application/json"]
responses:
200:
description: "The list of changes"
schema:
type: "array"
items:
type: "object"
x-go-name: "ContainerChangeResponseItem"
title: "ContainerChangeResponseItem"
description: "change item in response to ContainerChanges operation"
required: [Path, Kind]
properties:
Path:
description: "Path to file that has changed"
type: "string"
x-nullable: false
Kind:
description: "Kind of change"
type: "integer"
format: "uint8"
enum: [0, 1, 2]
x-nullable: false
examples:
application/json:
- Path: "/dev"
Kind: 0
- Path: "/dev/kmsg"
Kind: 1
- Path: "/test"
Kind: 1
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/export:
get:
summary: "Export a container"
description: "Export the contents of a container as a tarball."
operationId: "ContainerExport"
produces:
- "application/octet-stream"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/stats:
get:
summary: "Get container stats based on resource usage"
description: |
This endpoint returns a live stream of a container’s resource usage
statistics.
The `precpu_stats` is the CPU statistic of the *previous* read, and is
used to calculate the CPU usage percentage. It is not an exact copy
of the `cpu_stats` field.
If either `precpu_stats.online_cpus` or `cpu_stats.online_cpus` is
nil then for compatibility with older daemons the length of the
corresponding `cpu_usage.percpu_usage` array should be used.
On a cgroup v2 host, the following fields are not set
* `blkio_stats`: all fields other than `io_service_bytes_recursive`
* `cpu_stats`: `cpu_usage.percpu_usage`
* `memory_stats`: `max_usage` and `failcnt`
Also, `memory_stats.stats` fields are incompatible with cgroup v1.
To calculate the values shown by the `stats` command of the docker cli tool
the following formulas can be used:
* used_memory = `memory_stats.usage - memory_stats.stats.cache`
* available_memory = `memory_stats.limit`
* Memory usage % = `(used_memory / available_memory) * 100.0`
* cpu_delta = `cpu_stats.cpu_usage.total_usage - precpu_stats.cpu_usage.total_usage`
* system_cpu_delta = `cpu_stats.system_cpu_usage - precpu_stats.system_cpu_usage`
* number_cpus = `lenght(cpu_stats.cpu_usage.percpu_usage)` or `cpu_stats.online_cpus`
* CPU usage % = `(cpu_delta / system_cpu_delta) * number_cpus * 100.0`
operationId: "ContainerStats"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
type: "object"
examples:
application/json:
read: "2015-01-08T22:57:31.547920715Z"
pids_stats:
current: 3
networks:
eth0:
rx_bytes: 5338
rx_dropped: 0
rx_errors: 0
rx_packets: 36
tx_bytes: 648
tx_dropped: 0
tx_errors: 0
tx_packets: 8
eth5:
rx_bytes: 4641
rx_dropped: 0
rx_errors: 0
rx_packets: 26
tx_bytes: 690
tx_dropped: 0
tx_errors: 0
tx_packets: 9
memory_stats:
stats:
total_pgmajfault: 0
cache: 0
mapped_file: 0
total_inactive_file: 0
pgpgout: 414
rss: 6537216
total_mapped_file: 0
writeback: 0
unevictable: 0
pgpgin: 477
total_unevictable: 0
pgmajfault: 0
total_rss: 6537216
total_rss_huge: 6291456
total_writeback: 0
total_inactive_anon: 0
rss_huge: 6291456
hierarchical_memory_limit: 67108864
total_pgfault: 964
total_active_file: 0
active_anon: 6537216
total_active_anon: 6537216
total_pgpgout: 414
total_cache: 0
inactive_anon: 0
active_file: 0
pgfault: 964
inactive_file: 0
total_pgpgin: 477
max_usage: 6651904
usage: 6537216
failcnt: 0
limit: 67108864
blkio_stats: {}
cpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24472255
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100215355
usage_in_kernelmode: 30000000
system_cpu_usage: 739306590000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
precpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24350896
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100093996
usage_in_kernelmode: 30000000
system_cpu_usage: 9492140000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "stream"
in: "query"
description: |
Stream the output. If false, the stats will be output once and then
it will disconnect.
type: "boolean"
default: true
- name: "one-shot"
in: "query"
description: |
Only get a single stat instead of waiting for 2 cycles. Must be used
with `stream=false`.
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/resize:
post:
summary: "Resize a container TTY"
description: "Resize the TTY for a container."
operationId: "ContainerResize"
consumes:
- "application/octet-stream"
produces:
- "text/plain"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "cannot resize container"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Container"]
/containers/{id}/start:
post:
summary: "Start a container"
operationId: "ContainerStart"
responses:
204:
description: "no error"
304:
description: "container already started"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container. Format is a
single character `[a-Z]` or `ctrl-<value>` where `<value>` is one
of: `a-z`, `@`, `^`, `[`, `,` or `_`.
type: "string"
tags: ["Container"]
/containers/{id}/stop:
post:
summary: "Stop a container"
operationId: "ContainerStop"
responses:
204:
description: "no error"
304:
description: "container already stopped"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/restart:
post:
summary: "Restart a container"
operationId: "ContainerRestart"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/kill:
post:
summary: "Kill a container"
description: |
Send a POSIX signal to a container, defaulting to killing to the
container.
operationId: "ContainerKill"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is not running"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "Container d37cde0fe4ad63c3a7252023b2f9800282894247d145cb5933ddf6e52cc03a28 is not running"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
default: "SIGKILL"
tags: ["Container"]
/containers/{id}/update:
post:
summary: "Update a container"
description: |
Change various configuration options of a container without having to
recreate it.
operationId: "ContainerUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "The container has been updated."
schema:
type: "object"
title: "ContainerUpdateResponse"
description: "OK response to ContainerUpdate operation"
properties:
Warnings:
type: "array"
items:
type: "string"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "update"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
example:
BlkioWeight: 300
CpuShares: 512
CpuPeriod: 100000
CpuQuota: 50000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpusetCpus: "0,1"
CpusetMems: "0"
Memory: 314572800
MemorySwap: 514288000
MemoryReservation: 209715200
RestartPolicy:
MaximumRetryCount: 4
Name: "on-failure"
tags: ["Container"]
/containers/{id}/rename:
post:
summary: "Rename a container"
operationId: "ContainerRename"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "name already in use"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "name"
in: "query"
required: true
description: "New name for the container"
type: "string"
tags: ["Container"]
/containers/{id}/pause:
post:
summary: "Pause a container"
description: |
Use the freezer cgroup to suspend all processes in a container.
Traditionally, when suspending a process the `SIGSTOP` signal is used,
which is observable by the process being suspended. With the freezer
cgroup the process is unaware, and unable to capture, that it is being
suspended, and subsequently resumed.
operationId: "ContainerPause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/unpause:
post:
summary: "Unpause a container"
description: "Resume a container which has been paused."
operationId: "ContainerUnpause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/attach:
post:
summary: "Attach to a container"
description: |
Attach to a container to read its output or send it input. You can attach
to the same container multiple times and you can reattach to containers
that have been detached.
Either the `stream` or `logs` parameter must be `true` for this endpoint
to do anything.
See the [documentation for the `docker attach` command](https://docs.docker.com/engine/reference/commandline/attach/)
for more details.
### Hijacking
This endpoint hijacks the HTTP connection to transport `stdin`, `stdout`,
and `stderr` on the same socket.
This is the response from the daemon for an attach request:
```
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
[STREAM]
```
After the headers and two new lines, the TCP connection can now be used
for raw, bidirectional communication between the client and server.
To hint potential proxies about connection hijacking, the Docker client
can also optionally send connection upgrade headers.
For example, the client sends this request to upgrade the connection:
```
POST /containers/16253994b7c4/attach?stream=1&stdout=1 HTTP/1.1
Upgrade: tcp
Connection: Upgrade
```
The Docker daemon will respond with a `101 UPGRADED` response, and will
similarly follow with the raw stream:
```
HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp
[STREAM]
```
### Stream format
When the TTY setting is disabled in [`POST /containers/create`](#operation/ContainerCreate),
the HTTP Content-Type header is set to application/vnd.docker.multiplexed-stream
and the stream over the hijacked connected is multiplexed to separate out
`stdout` and `stderr`. The stream consists of a series of frames, each
containing a header and a payload.
The header contains the information which the stream writes (`stdout` or
`stderr`). It also contains the size of the associated frame encoded in
the last four bytes (`uint32`).
It is encoded on the first eight bytes like this:
```go
header := [8]byte{STREAM_TYPE, 0, 0, 0, SIZE1, SIZE2, SIZE3, SIZE4}
```
`STREAM_TYPE` can be:
- 0: `stdin` (is written on `stdout`)
- 1: `stdout`
- 2: `stderr`
`SIZE1, SIZE2, SIZE3, SIZE4` are the four bytes of the `uint32` size
encoded as big endian.
Following the header is the payload, which is the specified number of
bytes of `STREAM_TYPE`.
The simplest way to implement this protocol is the following:
1. Read 8 bytes.
2. Choose `stdout` or `stderr` depending on the first byte.
3. Extract the frame size from the last four bytes.
4. Read the extracted size and output it on the correct output.
5. Goto 1.
### Stream format when using a TTY
When the TTY setting is enabled in [`POST /containers/create`](#operation/ContainerCreate),
the stream is not multiplexed. The data exchanged over the hijacked
connection is simply the raw data from the process PTY and client's
`stdin`.
operationId: "ContainerAttach"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,` or `_`.
type: "string"
- name: "logs"
in: "query"
description: |
Replay previous logs from the container.
This is useful for attaching to a container that has started and you
want to output everything since the container started.
If `stream` is also enabled, once all the previous output has been
returned, it will seamlessly transition into streaming current
output.
type: "boolean"
default: false
- name: "stream"
in: "query"
description: |
Stream attached streams from the time the request was made onwards.
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/attach/ws:
get:
summary: "Attach to a container via a websocket"
operationId: "ContainerAttachWebsocket"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,`, or `_`.
type: "string"
- name: "logs"
in: "query"
description: "Return logs"
type: "boolean"
default: false
- name: "stream"
in: "query"
description: "Return stream"
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/wait:
post:
summary: "Wait for a container"
description: "Block until a container stops, then returns the exit code."
operationId: "ContainerWait"
produces: ["application/json"]
responses:
200:
description: "The container has exit."
schema:
$ref: "#/definitions/ContainerWaitResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "condition"
in: "query"
description: |
Wait until a container state reaches the given condition.
Defaults to `not-running` if omitted or empty.
type: "string"
enum:
- "not-running"
- "next-exit"
- "removed"
default: "not-running"
tags: ["Container"]
/containers/{id}:
delete:
summary: "Remove a container"
operationId: "ContainerDelete"
responses:
204:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: |
You cannot remove a running container: c2ada9df5af8. Stop the
container before attempting removal or force remove
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "v"
in: "query"
description: "Remove anonymous volumes associated with the container."
type: "boolean"
default: false
- name: "force"
in: "query"
description: "If the container is running, kill it before removing it."
type: "boolean"
default: false
- name: "link"
in: "query"
description: "Remove the specified link associated with the container."
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/archive:
head:
summary: "Get information about files in a container"
description: |
A response header `X-Docker-Container-Path-Stat` is returned, containing
a base64 - encoded JSON object with some filesystem header information
about the path.
operationId: "ContainerArchiveInfo"
responses:
200:
description: "no error"
headers:
X-Docker-Container-Path-Stat:
type: "string"
description: |
A base64 - encoded JSON object with some filesystem header
information about the path
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
get:
summary: "Get an archive of a filesystem resource in a container"
description: "Get a tar archive of a resource in the filesystem of container id."
operationId: "ContainerArchive"
produces: ["application/x-tar"]
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
put:
summary: "Extract an archive of files or folders to a directory in a container"
description: |
Upload a tar archive to be extracted to a path in the filesystem of container id.
`path` parameter is asserted to be a directory. If it exists as a file, 400 error
will be returned with message "not a directory".
operationId: "PutContainerArchive"
consumes: ["application/x-tar", "application/octet-stream"]
responses:
200:
description: "The content was extracted successfully"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "not a directory"
403:
description: "Permission denied, the volume or container rootfs is marked as read-only."
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such container or path does not exist inside the container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Path to a directory in the container to extract the archive’s contents into. "
type: "string"
- name: "noOverwriteDirNonDir"
in: "query"
description: |
If `1`, `true`, or `True` then it will be an error if unpacking the
given content would cause an existing directory to be replaced with
a non-directory and vice versa.
type: "string"
- name: "copyUIDGID"
in: "query"
description: |
If `1`, `true`, then it will copy UID/GID maps to the dest file or
dir
type: "string"
- name: "inputStream"
in: "body"
required: true
description: |
The input stream must be a tar archive compressed with one of the
following algorithms: `identity` (no compression), `gzip`, `bzip2`,
or `xz`.
schema:
type: "string"
format: "binary"
tags: ["Container"]
/containers/prune:
post:
summary: "Delete stopped containers"
produces:
- "application/json"
operationId: "ContainerPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune containers created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune containers with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ContainerPruneResponse"
properties:
ContainersDeleted:
description: "Container IDs that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/images/json:
get:
summary: "List Images"
description: "Returns a list of images on the server. Note that it uses a different, smaller representation of an image than inspecting a single image."
operationId: "ImageList"
produces:
- "application/json"
responses:
200:
description: "Summary image data for the images matching the query"
schema:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "all"
in: "query"
description: "Show all images. Only images from a final layer (no children) are shown by default."
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the images list.
Available filters:
- `before`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
- `dangling=true`
- `label=key` or `label="key=value"` of an image label
- `reference`=(`<image-name>[:<tag>]`)
- `since`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
type: "string"
- name: "shared-size"
in: "query"
description: "Compute and show shared size as a `SharedSize` field on each image."
type: "boolean"
default: false
- name: "digests"
in: "query"
description: "Show digest information as a `RepoDigests` field on each image."
type: "boolean"
default: false
tags: ["Image"]
/build:
post:
summary: "Build an image"
description: |
Build an image from a tar archive with a `Dockerfile` in it.
The `Dockerfile` specifies how the image is built from the tar archive. It is typically in the archive's root, but can be at a different path or have a different name by specifying the `dockerfile` parameter. [See the `Dockerfile` reference for more information](https://docs.docker.com/engine/reference/builder/).
The Docker daemon performs a preliminary validation of the `Dockerfile` before starting the build, and returns an error if the syntax is incorrect. After that, each instruction is run one-by-one until the ID of the new image is output.
The build is canceled if the client drops the connection by quitting or being killed.
operationId: "ImageBuild"
consumes:
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "inputStream"
in: "body"
description: "A tar archive compressed with one of the following algorithms: identity (no compression), gzip, bzip2, xz."
schema:
type: "string"
format: "binary"
- name: "dockerfile"
in: "query"
description: "Path within the build context to the `Dockerfile`. This is ignored if `remote` is specified and points to an external `Dockerfile`."
type: "string"
default: "Dockerfile"
- name: "t"
in: "query"
description: "A name and optional tag to apply to the image in the `name:tag` format. If you omit the tag the default `latest` value is assumed. You can provide several `t` parameters."
type: "string"
- name: "extrahosts"
in: "query"
description: "Extra hosts to add to /etc/hosts"
type: "string"
- name: "remote"
in: "query"
description: "A Git repository URI or HTTP/HTTPS context URI. If the URI points to a single text file, the file’s contents are placed into a file called `Dockerfile` and the image is built from that file. If the URI points to a tarball, the file is downloaded by the daemon and the contents therein used as the context for the build. If the URI points to a tarball and the `dockerfile` parameter is also specified, there must be a file with the corresponding path inside the tarball."
type: "string"
- name: "q"
in: "query"
description: "Suppress verbose build output."
type: "boolean"
default: false
- name: "nocache"
in: "query"
description: "Do not use the cache when building the image."
type: "boolean"
default: false
- name: "cachefrom"
in: "query"
description: "JSON array of images used for build cache resolution."
type: "string"
- name: "pull"
in: "query"
description: "Attempt to pull the image even if an older image exists locally."
type: "string"
- name: "rm"
in: "query"
description: "Remove intermediate containers after a successful build."
type: "boolean"
default: true
- name: "forcerm"
in: "query"
description: "Always remove intermediate containers, even upon failure."
type: "boolean"
default: false
- name: "memory"
in: "query"
description: "Set memory limit for build."
type: "integer"
- name: "memswap"
in: "query"
description: "Total memory (memory + swap). Set as `-1` to disable swap."
type: "integer"
- name: "cpushares"
in: "query"
description: "CPU shares (relative weight)."
type: "integer"
- name: "cpusetcpus"
in: "query"
description: "CPUs in which to allow execution (e.g., `0-3`, `0,1`)."
type: "string"
- name: "cpuperiod"
in: "query"
description: "The length of a CPU period in microseconds."
type: "integer"
- name: "cpuquota"
in: "query"
description: "Microseconds of CPU time that the container can get in a CPU period."
type: "integer"
- name: "buildargs"
in: "query"
description: >
JSON map of string pairs for build-time variables. Users pass these values at build-time. Docker
uses the buildargs as the environment context for commands run via the `Dockerfile` RUN
instruction, or for variable expansion in other `Dockerfile` instructions. This is not meant for
passing secret values.
For example, the build arg `FOO=bar` would become `{"FOO":"bar"}` in JSON. This would result in the
query parameter `buildargs={"FOO":"bar"}`. Note that `{"FOO":"bar"}` should be URI component encoded.
[Read more about the buildargs instruction.](https://docs.docker.com/engine/reference/builder/#arg)
type: "string"
- name: "shmsize"
in: "query"
description: "Size of `/dev/shm` in bytes. The size must be greater than 0. If omitted the system uses 64MB."
type: "integer"
- name: "squash"
in: "query"
description: "Squash the resulting images layers into a single layer. *(Experimental release only.)*"
type: "boolean"
- name: "labels"
in: "query"
description: "Arbitrary key/value labels to set on the image, as a JSON map of string pairs."
type: "string"
- name: "networkmode"
in: "query"
description: |
Sets the networking mode for the run commands during build. Supported
standard values are: `bridge`, `host`, `none`, and `container:<name|id>`.
Any other value is taken as a custom network's name or ID to which this
container should connect to.
type: "string"
- name: "Content-type"
in: "header"
type: "string"
enum:
- "application/x-tar"
default: "application/x-tar"
- name: "X-Registry-Config"
in: "header"
description: |
This is a base64-encoded JSON object with auth configurations for multiple registries that a build may refer to.
The key is a registry URL, and the value is an auth configuration object, [as described in the authentication section](#section/Authentication). For example:
```
{
"docker.example.com": {
"username": "janedoe",
"password": "hunter2"
},
"https://index.docker.io/v1/": {
"username": "mobydock",
"password": "conta1n3rize14"
}
}
```
Only the registry domain name (and port if not the default 443) are required. However, for legacy reasons, the Docker Hub registry must be specified with both a `https://` prefix and a `/v1/` suffix even though Docker will prefer to use the v2 registry API.
type: "string"
- name: "platform"
in: "query"
description: "Platform in the format os[/arch[/variant]]"
type: "string"
default: ""
- name: "target"
in: "query"
description: "Target build stage"
type: "string"
default: ""
- name: "outputs"
in: "query"
description: "BuildKit output configuration"
type: "string"
default: ""
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/build/prune:
post:
summary: "Delete builder cache"
produces:
- "application/json"
operationId: "BuildPrune"
parameters:
- name: "keep-storage"
in: "query"
description: "Amount of disk space in bytes to keep for cache"
type: "integer"
format: "int64"
- name: "all"
in: "query"
type: "boolean"
description: "Remove all types of build cache"
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the list of build cache objects.
Available filters:
- `until=<duration>`: duration relative to daemon's time, during which build cache was not used, in Go's duration format (e.g., '24h')
- `id=<id>`
- `parent=<id>`
- `type=<string>`
- `description=<string>`
- `inuse`
- `shared`
- `private`
responses:
200:
description: "No error"
schema:
type: "object"
title: "BuildPruneResponse"
properties:
CachesDeleted:
type: "array"
items:
description: "ID of build cache object"
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/images/create:
post:
summary: "Create an image"
description: "Create an image by either pulling it from a registry or importing it."
operationId: "ImageCreate"
consumes:
- "text/plain"
- "application/octet-stream"
produces:
- "application/json"
responses:
200:
description: "no error"
404:
description: "repository does not exist or no read access"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "fromImage"
in: "query"
description: "Name of the image to pull. The name may include a tag or digest. This parameter may only be used when pulling an image. The pull is cancelled if the HTTP connection is closed."
type: "string"
- name: "fromSrc"
in: "query"
description: "Source to import. The value may be a URL from which the image can be retrieved or `-` to read the image from the request body. This parameter may only be used when importing an image."
type: "string"
- name: "repo"
in: "query"
description: "Repository name given to an image when it is imported. The repo may include a tag. This parameter may only be used when importing an image."
type: "string"
- name: "tag"
in: "query"
description: "Tag or digest. If empty when pulling an image, this causes all tags for the given image to be pulled."
type: "string"
- name: "message"
in: "query"
description: "Set commit message for imported image."
type: "string"
- name: "inputImage"
in: "body"
description: "Image content if the value `-` has been specified in fromSrc query parameter"
schema:
type: "string"
required: false
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "changes"
in: "query"
description: |
Apply `Dockerfile` instructions to the image that is created,
for example: `changes=ENV DEBUG=true`.
Note that `ENV DEBUG=true` should be URI component encoded.
Supported `Dockerfile` instructions:
`CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
type: "array"
items:
type: "string"
- name: "platform"
in: "query"
description: |
Platform in the format os[/arch[/variant]].
When used in combination with the `fromImage` option, the daemon checks
if the given image is present in the local image cache with the given
OS and Architecture, and otherwise attempts to pull the image. If the
option is not set, the host's native OS and Architecture are used.
If the given image does not exist in the local image cache, the daemon
attempts to pull the image with the host's native OS and Architecture.
If the given image does exists in the local image cache, but its OS or
architecture does not match, a warning is produced.
When used with the `fromSrc` option to import an image from an archive,
this option sets the platform information for the imported image. If
the option is not set, the host's native OS and Architecture are used
for the imported image.
type: "string"
default: ""
tags: ["Image"]
/images/{name}/json:
get:
summary: "Inspect an image"
description: "Return low-level information about an image."
operationId: "ImageInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/ImageInspect"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Image"]
/images/{name}/history:
get:
summary: "Get the history of an image"
description: "Return parent layers of an image."
operationId: "ImageHistory"
produces: ["application/json"]
responses:
200:
description: "List of image layers"
schema:
type: "array"
items:
type: "object"
x-go-name: HistoryResponseItem
title: "HistoryResponseItem"
description: "individual image layer information in response to ImageHistory operation"
required: [Id, Created, CreatedBy, Tags, Size, Comment]
properties:
Id:
type: "string"
x-nullable: false
Created:
type: "integer"
format: "int64"
x-nullable: false
CreatedBy:
type: "string"
x-nullable: false
Tags:
type: "array"
items:
type: "string"
Size:
type: "integer"
format: "int64"
x-nullable: false
Comment:
type: "string"
x-nullable: false
examples:
application/json:
- Id: "3db9c44f45209632d6050b35958829c3a2aa256d81b9a7be45b362ff85c54710"
Created: 1398108230
CreatedBy: "/bin/sh -c #(nop) ADD file:eb15dbd63394e063b805a3c32ca7bf0266ef64676d5a6fab4801f2e81e2a5148 in /"
Tags:
- "ubuntu:lucid"
- "ubuntu:10.04"
Size: 182964289
Comment: ""
- Id: "6cfa4d1f33fb861d4d114f43b25abd0ac737509268065cdfd69d544a59c85ab8"
Created: 1398108222
CreatedBy: "/bin/sh -c #(nop) MAINTAINER Tianon Gravi <[email protected]> - mkimage-debootstrap.sh -i iproute,iputils-ping,ubuntu-minimal -t lucid.tar.xz lucid http://archive.ubuntu.com/ubuntu/"
Tags: []
Size: 0
Comment: ""
- Id: "511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158"
Created: 1371157430
CreatedBy: ""
Tags:
- "scratch12:latest"
- "scratch:latest"
Size: 0
Comment: "Imported from -"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/{name}/push:
post:
summary: "Push an image"
description: |
Push an image to a registry.
If you wish to push an image on to a private registry, that image must
already have a tag which references the registry. For example,
`registry.example.com/myimage:latest`.
The push is cancelled if the HTTP connection is closed.
operationId: "ImagePush"
consumes:
- "application/octet-stream"
responses:
200:
description: "No error"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID."
type: "string"
required: true
- name: "tag"
in: "query"
description: "The tag to associate with the image on the registry."
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
required: true
tags: ["Image"]
/images/{name}/tag:
post:
summary: "Tag an image"
description: "Tag an image so that it becomes part of a repository."
operationId: "ImageTag"
responses:
201:
description: "No error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID to tag."
type: "string"
required: true
- name: "repo"
in: "query"
description: "The repository to tag in. For example, `someuser/someimage`."
type: "string"
- name: "tag"
in: "query"
description: "The name of the new tag."
type: "string"
tags: ["Image"]
/images/{name}:
delete:
summary: "Remove an image"
description: |
Remove an image, along with any untagged parent images that were
referenced by that image.
Images can't be removed if they have descendant images, are being
used by a running container or are being used by a build.
operationId: "ImageDelete"
produces: ["application/json"]
responses:
200:
description: "The image was deleted successfully"
schema:
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
examples:
application/json:
- Untagged: "3e2f21a89f"
- Deleted: "3e2f21a89f"
- Deleted: "53b4f83ac9"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
- name: "force"
in: "query"
description: "Remove the image even if it is being used by stopped containers or has other tags"
type: "boolean"
default: false
- name: "noprune"
in: "query"
description: "Do not delete untagged parent images"
type: "boolean"
default: false
tags: ["Image"]
/images/search:
get:
summary: "Search images"
description: "Search for an image on Docker Hub."
operationId: "ImageSearch"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
type: "object"
title: "ImageSearchResponseItem"
properties:
description:
type: "string"
is_official:
type: "boolean"
is_automated:
type: "boolean"
name:
type: "string"
star_count:
type: "integer"
examples:
application/json:
- description: ""
is_official: false
is_automated: false
name: "wma55/u1210sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "jdswinbank/sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "vgauthier/sshd"
star_count: 0
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "term"
in: "query"
description: "Term to search"
type: "string"
required: true
- name: "limit"
in: "query"
description: "Maximum number of results to return"
type: "integer"
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to process on the images list. Available filters:
- `is-automated=(true|false)`
- `is-official=(true|false)`
- `stars=<number>` Matches images that has at least 'number' stars.
type: "string"
tags: ["Image"]
/images/prune:
post:
summary: "Delete unused images"
produces:
- "application/json"
operationId: "ImagePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`). Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), prune only
unused *and* untagged images. When set to `false`
(or `0`), all unused images are pruned.
- `until=<string>` Prune images created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune images with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ImagePruneResponse"
properties:
ImagesDeleted:
description: "Images that were deleted"
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/auth:
post:
summary: "Check auth configuration"
description: |
Validate credentials for a registry and, if available, get an identity
token for accessing the registry without password.
operationId: "SystemAuth"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "An identity token was generated successfully."
schema:
type: "object"
title: "SystemAuthResponse"
required: [Status]
properties:
Status:
description: "The status of the authentication"
type: "string"
x-nullable: false
IdentityToken:
description: "An opaque token used to authenticate a user after a successful login"
type: "string"
x-nullable: false
examples:
application/json:
Status: "Login Succeeded"
IdentityToken: "9cbaf023786cd7..."
204:
description: "No error"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "authConfig"
in: "body"
description: "Authentication to check"
schema:
$ref: "#/definitions/AuthConfig"
tags: ["System"]
/info:
get:
summary: "Get system information"
operationId: "SystemInfo"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/SystemInfo"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/version:
get:
summary: "Get version"
description: "Returns the version of Docker that is running and various information about the system that Docker is running on."
operationId: "SystemVersion"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/SystemVersion"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/_ping:
get:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPing"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "OK"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
headers:
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
tags: ["System"]
head:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPingHead"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "(empty)"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/commit:
post:
summary: "Create a new image from a container"
operationId: "ImageCommit"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "containerConfig"
in: "body"
description: "The container configuration"
schema:
$ref: "#/definitions/ContainerConfig"
- name: "container"
in: "query"
description: "The ID or name of the container to commit"
type: "string"
- name: "repo"
in: "query"
description: "Repository name for the created image"
type: "string"
- name: "tag"
in: "query"
description: "Tag name for the create image"
type: "string"
- name: "comment"
in: "query"
description: "Commit message"
type: "string"
- name: "author"
in: "query"
description: "Author of the image (e.g., `John Hannibal Smith <[email protected]>`)"
type: "string"
- name: "pause"
in: "query"
description: "Whether to pause the container before committing"
type: "boolean"
default: true
- name: "changes"
in: "query"
description: "`Dockerfile` instructions to apply while committing"
type: "string"
tags: ["Image"]
/events:
get:
summary: "Monitor events"
description: |
Stream real-time events from the server.
Various objects within Docker report events when something happens to them.
Containers report these events: `attach`, `commit`, `copy`, `create`, `destroy`, `detach`, `die`, `exec_create`, `exec_detach`, `exec_start`, `exec_die`, `export`, `health_status`, `kill`, `oom`, `pause`, `rename`, `resize`, `restart`, `start`, `stop`, `top`, `unpause`, `update`, and `prune`
Images report these events: `delete`, `import`, `load`, `pull`, `push`, `save`, `tag`, `untag`, and `prune`
Volumes report these events: `create`, `mount`, `unmount`, `destroy`, and `prune`
Networks report these events: `create`, `connect`, `disconnect`, `destroy`, `update`, `remove`, and `prune`
The Docker daemon reports these events: `reload`
Services report these events: `create`, `update`, and `remove`
Nodes report these events: `create`, `update`, and `remove`
Secrets report these events: `create`, `update`, and `remove`
Configs report these events: `create`, `update`, and `remove`
The Builder reports `prune` events
operationId: "SystemEvents"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/EventMessage"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "since"
in: "query"
description: "Show events created since this timestamp then stream new events."
type: "string"
- name: "until"
in: "query"
description: "Show events created until this timestamp then stop streaming."
type: "string"
- name: "filters"
in: "query"
description: |
A JSON encoded value of filters (a `map[string][]string`) to process on the event list. Available filters:
- `config=<string>` config name or ID
- `container=<string>` container name or ID
- `daemon=<string>` daemon name or ID
- `event=<string>` event type
- `image=<string>` image name or ID
- `label=<string>` image or container label
- `network=<string>` network name or ID
- `node=<string>` node ID
- `plugin`=<string> plugin name or ID
- `scope`=<string> local or swarm
- `secret=<string>` secret name or ID
- `service=<string>` service name or ID
- `type=<string>` object to filter by, one of `container`, `image`, `volume`, `network`, `daemon`, `plugin`, `node`, `service`, `secret` or `config`
- `volume=<string>` volume name
type: "string"
tags: ["System"]
/system/df:
get:
summary: "Get data usage information"
operationId: "SystemDataUsage"
responses:
200:
description: "no error"
schema:
type: "object"
title: "SystemDataUsageResponse"
properties:
LayersSize:
type: "integer"
format: "int64"
Images:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
Containers:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
Volumes:
type: "array"
items:
$ref: "#/definitions/Volume"
BuildCache:
type: "array"
items:
$ref: "#/definitions/BuildCache"
example:
LayersSize: 1092588
Images:
-
Id: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
ParentId: ""
RepoTags:
- "busybox:latest"
RepoDigests:
- "busybox@sha256:a59906e33509d14c036c8678d687bd4eec81ed7c4b8ce907b888c607f6a1e0e6"
Created: 1466724217
Size: 1092588
SharedSize: 0
VirtualSize: 1092588
Labels: {}
Containers: 1
Containers:
-
Id: "e575172ed11dc01bfce087fb27bee502db149e1a0fad7c296ad300bbff178148"
Names:
- "/top"
Image: "busybox"
ImageID: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
Command: "top"
Created: 1472592424
Ports: []
SizeRootFs: 1092588
Labels: {}
State: "exited"
Status: "Exited (0) 56 minutes ago"
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
IPAMConfig: null
Links: null
Aliases: null
NetworkID: "d687bc59335f0e5c9ee8193e5612e8aee000c8c62ea170cfb99c098f95899d92"
EndpointID: "8ed5115aeaad9abb174f68dcf135b49f11daf597678315231a32ca28441dec6a"
Gateway: "172.18.0.1"
IPAddress: "172.18.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Mounts: []
Volumes:
-
Name: "my-volume"
Driver: "local"
Mountpoint: "/var/lib/docker/volumes/my-volume/_data"
Labels: null
Scope: "local"
Options: null
UsageData:
Size: 10920104
RefCount: 2
BuildCache:
-
ID: "hw53o5aio51xtltp5xjp8v7fx"
Parent: ""
Type: "regular"
Description: "pulled from docker.io/library/debian@sha256:234cb88d3020898631af0ccbbcca9a66ae7306ecd30c9720690858c1b007d2a0"
InUse: false
Shared: true
Size: 0
CreatedAt: "2021-06-28T13:31:01.474619385Z"
LastUsedAt: "2021-07-07T22:02:32.738075951Z"
UsageCount: 26
-
ID: "ndlpt0hhvkqcdfkputsk4cq9c"
Parent: "hw53o5aio51xtltp5xjp8v7fx"
Type: "regular"
Description: "mount / from exec /bin/sh -c echo 'Binary::apt::APT::Keep-Downloaded-Packages \"true\";' > /etc/apt/apt.conf.d/keep-cache"
InUse: false
Shared: true
Size: 51
CreatedAt: "2021-06-28T13:31:03.002625487Z"
LastUsedAt: "2021-07-07T22:02:32.773909517Z"
UsageCount: 26
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "type"
in: "query"
description: |
Object types, for which to compute and return data.
type: "array"
collectionFormat: multi
items:
type: "string"
enum: ["container", "image", "volume", "build-cache"]
tags: ["System"]
/images/{name}/get:
get:
summary: "Export an image"
description: |
Get a tarball containing all images and metadata for a repository.
If `name` is a specific name and tag (e.g. `ubuntu:latest`), then only that image (and its parents) are returned. If `name` is an image ID, similarly only that image (and its parents) are returned, but with the exclusion of the `repositories` file in the tarball, as there were no image names referenced.
### Image tarball format
An image tarball contains one directory per image layer (named using its long ID), each containing these files:
- `VERSION`: currently `1.0` - the file format version
- `json`: detailed layer information, similar to `docker inspect layer_id`
- `layer.tar`: A tarfile containing the filesystem changes in this layer
The `layer.tar` file contains `aufs` style `.wh..wh.aufs` files and directories for storing attribute changes and deletions.
If the tarball defines a repository, the tarball should also include a `repositories` file at the root that contains a list of repository and tag names mapped to layer IDs.
```json
{
"hello-world": {
"latest": "565a9d68a73f6706862bfe8409a7f659776d4d60a8d096eb4a3cbce6999cc2a1"
}
}
```
operationId: "ImageGet"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/get:
get:
summary: "Export several images"
description: |
Get a tarball containing all images and metadata for several image
repositories.
For each value of the `names` parameter: if it is a specific name and
tag (e.g. `ubuntu:latest`), then only that image (and its parents) are
returned; if it is an image ID, similarly only that image (and its parents)
are returned and there would be no names referenced in the 'repositories'
file for this image ID.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageGetAll"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "names"
in: "query"
description: "Image names to filter by"
type: "array"
items:
type: "string"
tags: ["Image"]
/images/load:
post:
summary: "Import images"
description: |
Load a set of images and tags into a repository.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageLoad"
consumes:
- "application/x-tar"
produces:
- "application/json"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "imagesTarball"
in: "body"
description: "Tar archive containing images"
schema:
type: "string"
format: "binary"
- name: "quiet"
in: "query"
description: "Suppress progress details during load."
type: "boolean"
default: false
tags: ["Image"]
/containers/{id}/exec:
post:
summary: "Create an exec instance"
description: "Run a command inside a running container."
operationId: "ContainerExec"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is paused"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execConfig"
in: "body"
description: "Exec configuration"
schema:
type: "object"
title: "ExecConfig"
properties:
AttachStdin:
type: "boolean"
description: "Attach to `stdin` of the exec command."
AttachStdout:
type: "boolean"
description: "Attach to `stdout` of the exec command."
AttachStderr:
type: "boolean"
description: "Attach to `stderr` of the exec command."
DetachKeys:
type: "string"
description: |
Override the key sequence for detaching a container. Format is
a single character `[a-Z]` or `ctrl-<value>` where `<value>`
is one of: `a-z`, `@`, `^`, `[`, `,` or `_`.
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
Env:
description: |
A list of environment variables in the form `["VAR=value", ...]`.
type: "array"
items:
type: "string"
Cmd:
type: "array"
description: "Command to run, as a string or array of strings."
items:
type: "string"
Privileged:
type: "boolean"
description: "Runs the exec process with extended privileges."
default: false
User:
type: "string"
description: |
The user, and optionally, group to run the exec process inside
the container. Format is one of: `user`, `user:group`, `uid`,
or `uid:gid`.
WorkingDir:
type: "string"
description: |
The working directory for the exec process inside the container.
example:
AttachStdin: false
AttachStdout: true
AttachStderr: true
DetachKeys: "ctrl-p,ctrl-q"
Tty: false
Cmd:
- "date"
Env:
- "FOO=bar"
- "BAZ=quux"
required: true
- name: "id"
in: "path"
description: "ID or name of container"
type: "string"
required: true
tags: ["Exec"]
/exec/{id}/start:
post:
summary: "Start an exec instance"
description: |
Starts a previously set up exec instance. If detach is true, this endpoint
returns immediately after starting the command. Otherwise, it sets up an
interactive session with the command.
operationId: "ExecStart"
consumes:
- "application/json"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "No error"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Container is stopped or paused"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execStartConfig"
in: "body"
schema:
type: "object"
title: "ExecStartConfig"
properties:
Detach:
type: "boolean"
description: "Detach from the command."
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
example:
Detach: false
Tty: false
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/exec/{id}/resize:
post:
summary: "Resize an exec instance"
description: |
Resize the TTY session used by an exec instance. This endpoint only works
if `tty` was specified as part of creating and starting the exec instance.
operationId: "ExecResize"
responses:
200:
description: "No error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Exec"]
/exec/{id}/json:
get:
summary: "Inspect an exec instance"
description: "Return low-level information about an exec instance."
operationId: "ExecInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ExecInspectResponse"
properties:
CanRemove:
type: "boolean"
DetachKeys:
type: "string"
ID:
type: "string"
Running:
type: "boolean"
ExitCode:
type: "integer"
ProcessConfig:
$ref: "#/definitions/ProcessConfig"
OpenStdin:
type: "boolean"
OpenStderr:
type: "boolean"
OpenStdout:
type: "boolean"
ContainerID:
type: "string"
Pid:
type: "integer"
description: "The system process ID for the exec process."
examples:
application/json:
CanRemove: false
ContainerID: "b53ee82b53a40c7dca428523e34f741f3abc51d9f297a14ff874bf761b995126"
DetachKeys: ""
ExitCode: 2
ID: "f33bbfb39f5b142420f4759b2348913bd4a8d1a6d7fd56499cb41a1bb91d7b3b"
OpenStderr: true
OpenStdin: true
OpenStdout: true
ProcessConfig:
arguments:
- "-c"
- "exit 2"
entrypoint: "sh"
privileged: false
tty: true
user: "1000"
Running: false
Pid: 42000
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/volumes:
get:
summary: "List volumes"
operationId: "VolumeList"
produces: ["application/json"]
responses:
200:
description: "Summary volume data that matches the query"
schema:
$ref: "#/definitions/VolumeListResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to
process on the volumes list. Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
volumes that are not in use by a container. When set to `false`
(or `0`), only volumes that are in use by one or more
containers are returned.
- `driver=<volume-driver-name>` Matches volumes based on their driver.
- `label=<key>` or `label=<key>:<value>` Matches volumes based on
the presence of a `label` alone or a `label` and a value.
- `name=<volume-name>` Matches all or part of a volume name.
type: "string"
format: "json"
tags: ["Volume"]
/volumes/create:
post:
summary: "Create a volume"
operationId: "VolumeCreate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
201:
description: "The volume was created successfully"
schema:
$ref: "#/definitions/Volume"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "volumeConfig"
in: "body"
required: true
description: "Volume configuration"
schema:
$ref: "#/definitions/VolumeCreateOptions"
tags: ["Volume"]
/volumes/{name}:
get:
summary: "Inspect a volume"
operationId: "VolumeInspect"
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Volume"
404:
description: "No such volume"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
tags: ["Volume"]
delete:
summary: "Remove a volume"
description: "Instruct the driver to remove the volume."
operationId: "VolumeDelete"
responses:
204:
description: "The volume was removed"
404:
description: "No such volume or volume driver"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Volume is in use and cannot be removed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
- name: "force"
in: "query"
description: "Force the removal of the volume"
type: "boolean"
default: false
tags: ["Volume"]
/volumes/prune:
post:
summary: "Delete unused volumes"
produces:
- "application/json"
operationId: "VolumePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune volumes with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "VolumePruneResponse"
properties:
VolumesDeleted:
description: "Volumes that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Volume"]
/networks:
get:
summary: "List networks"
description: |
Returns a list of networks. For details on the format, see the
[network inspect endpoint](#operation/NetworkInspect).
Note that it uses a different, smaller representation of a network than
inspecting a single network. For example, the list of containers attached
to the network is not propagated in API versions 1.28 and up.
operationId: "NetworkList"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Network"
examples:
application/json:
- Name: "bridge"
Id: "f2de39df4171b0dc801e8002d1d999b77256983dfc63041c0f34030aa3977566"
Created: "2016-10-19T06:21:00.416543526Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config:
-
Subnet: "172.17.0.0/16"
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
- Name: "none"
Id: "e086a3893b05ab69242d3c44e49483a3bbbd3a26b46baa8f61ab797c1088d794"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "null"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
- Name: "host"
Id: "13e871235c677f196c4e1ecebb9dc733b9b2d2ab589e30c539efeda84a24215e"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "host"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to process
on the networks list.
Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
networks that are not in use by a container. When set to `false`
(or `0`), only networks that are in use by one or more
containers are returned.
- `driver=<driver-name>` Matches a network's driver.
- `id=<network-id>` Matches all or part of a network ID.
- `label=<key>` or `label=<key>=<value>` of a network label.
- `name=<network-name>` Matches all or part of a network name.
- `scope=["swarm"|"global"|"local"]` Filters networks by scope (`swarm`, `global`, or `local`).
- `type=["custom"|"builtin"]` Filters networks by type. The `custom` keyword returns all user-defined networks.
type: "string"
tags: ["Network"]
/networks/{id}:
get:
summary: "Inspect a network"
operationId: "NetworkInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Network"
404:
description: "Network not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "verbose"
in: "query"
description: "Detailed inspect output for troubleshooting"
type: "boolean"
default: false
- name: "scope"
in: "query"
description: "Filter the network by scope (swarm, global, or local)"
type: "string"
tags: ["Network"]
delete:
summary: "Remove a network"
operationId: "NetworkDelete"
responses:
204:
description: "No error"
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such network"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
tags: ["Network"]
/networks/create:
post:
summary: "Create a network"
operationId: "NetworkCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "No error"
schema:
type: "object"
title: "NetworkCreateResponse"
properties:
Id:
description: "The ID of the created network."
type: "string"
Warning:
type: "string"
example:
Id: "22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30"
Warning: ""
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "plugin not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "networkConfig"
in: "body"
description: "Network configuration"
required: true
schema:
type: "object"
title: "NetworkCreateRequest"
required: ["Name"]
properties:
Name:
description: "The network's name."
type: "string"
CheckDuplicate:
description: |
Check for networks with duplicate names. Since Network is
primarily keyed based on a random ID and not on the name, and
network name is strictly a user-friendly alias to the network
which is uniquely identified using ID, there is no guaranteed
way to check for duplicates. CheckDuplicate is there to provide
a best effort checking of any networks which has the same name
but it is not guaranteed to catch all name collisions.
type: "boolean"
Driver:
description: "Name of the network driver plugin to use."
type: "string"
default: "bridge"
Internal:
description: "Restrict external access to the network."
type: "boolean"
Attachable:
description: |
Globally scoped network is manually attachable by regular
containers from workers in swarm mode.
type: "boolean"
Ingress:
description: |
Ingress network is the network which provides the routing-mesh
in swarm mode.
type: "boolean"
IPAM:
description: "Optional custom IP scheme for the network."
$ref: "#/definitions/IPAM"
EnableIPv6:
description: "Enable IPv6 on the network."
type: "boolean"
Options:
description: "Network specific options to be used by the drivers."
type: "object"
additionalProperties:
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
Name: "isolated_nw"
CheckDuplicate: false
Driver: "bridge"
EnableIPv6: true
IPAM:
Driver: "default"
Config:
- Subnet: "172.20.0.0/16"
IPRange: "172.20.10.0/24"
Gateway: "172.20.10.11"
- Subnet: "2001:db8:abcd::/64"
Gateway: "2001:db8:abcd::1011"
Options:
foo: "bar"
Internal: true
Attachable: false
Ingress: false
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
tags: ["Network"]
/networks/{id}/connect:
post:
summary: "Connect a container to a network"
operationId: "NetworkConnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkConnectRequest"
properties:
Container:
type: "string"
description: "The ID or name of the container to connect to the network."
EndpointConfig:
$ref: "#/definitions/EndpointSettings"
example:
Container: "3613f73ba0e4"
EndpointConfig:
IPAMConfig:
IPv4Address: "172.24.56.89"
IPv6Address: "2001:db8::5689"
tags: ["Network"]
/networks/{id}/disconnect:
post:
summary: "Disconnect a container from a network"
operationId: "NetworkDisconnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkDisconnectRequest"
properties:
Container:
type: "string"
description: |
The ID or name of the container to disconnect from the network.
Force:
type: "boolean"
description: |
Force the container to disconnect from the network.
tags: ["Network"]
/networks/prune:
post:
summary: "Delete unused networks"
produces:
- "application/json"
operationId: "NetworkPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune networks created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune networks with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "NetworkPruneResponse"
properties:
NetworksDeleted:
description: "Networks that were deleted"
type: "array"
items:
type: "string"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Network"]
/plugins:
get:
summary: "List plugins"
operationId: "PluginList"
description: "Returns information about installed plugins."
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Plugin"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the plugin list.
Available filters:
- `capability=<capability name>`
- `enable=<true>|<false>`
tags: ["Plugin"]
/plugins/privileges:
get:
summary: "Get plugin privileges"
operationId: "GetPluginPrivileges"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags:
- "Plugin"
/plugins/pull:
post:
summary: "Install a plugin"
operationId: "PluginPull"
description: |
Pulls and installs a plugin. After the plugin is installed, it can be
enabled using the [`POST /plugins/{name}/enable` endpoint](#operation/PostPluginsEnable).
produces:
- "application/json"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
Remote reference for plugin to install.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "name"
in: "query"
description: |
Local name for the pulled plugin.
The `:latest` tag is optional, and is used as the default if omitted.
required: false
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/{name}/json:
get:
summary: "Inspect a plugin"
operationId: "PluginInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}:
delete:
summary: "Remove a plugin"
operationId: "PluginDelete"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "force"
in: "query"
description: |
Disable the plugin before removing. This may result in issues if the
plugin is in use by a container.
type: "boolean"
default: false
tags: ["Plugin"]
/plugins/{name}/enable:
post:
summary: "Enable a plugin"
operationId: "PluginEnable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "timeout"
in: "query"
description: "Set the HTTP client timeout (in seconds)"
type: "integer"
default: 0
tags: ["Plugin"]
/plugins/{name}/disable:
post:
summary: "Disable a plugin"
operationId: "PluginDisable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}/upgrade:
post:
summary: "Upgrade a plugin"
operationId: "PluginUpgrade"
responses:
204:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "remote"
in: "query"
description: |
Remote reference to upgrade to.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/create:
post:
summary: "Create a plugin"
operationId: "PluginCreate"
consumes:
- "application/x-tar"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "tarContext"
in: "body"
description: "Path to tar containing plugin rootfs and manifest"
schema:
type: "string"
format: "binary"
tags: ["Plugin"]
/plugins/{name}/push:
post:
summary: "Push a plugin"
operationId: "PluginPush"
description: |
Push a plugin to the registry.
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
responses:
200:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/plugins/{name}/set:
post:
summary: "Configure a plugin"
operationId: "PluginSet"
consumes:
- "application/json"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
type: "string"
example: ["DEBUG=1"]
responses:
204:
description: "No error"
404:
description: "Plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/nodes:
get:
summary: "List nodes"
operationId: "NodeList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Node"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the nodes list, encoded as JSON (a `map[string][]string`).
Available filters:
- `id=<node id>`
- `label=<engine label>`
- `membership=`(`accepted`|`pending`)`
- `name=<node name>`
- `node.label=<node label>`
- `role=`(`manager`|`worker`)`
type: "string"
tags: ["Node"]
/nodes/{id}:
get:
summary: "Inspect a node"
operationId: "NodeInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Node"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
tags: ["Node"]
delete:
summary: "Delete a node"
operationId: "NodeDelete"
responses:
200:
description: "no error"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
- name: "force"
in: "query"
description: "Force remove a node from the swarm"
default: false
type: "boolean"
tags: ["Node"]
/nodes/{id}/update:
post:
summary: "Update a node"
operationId: "NodeUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID of the node"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/NodeSpec"
- name: "version"
in: "query"
description: |
The version number of the node object being updated. This is required
to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Node"]
/swarm:
get:
summary: "Inspect swarm"
operationId: "SwarmInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Swarm"
404:
description: "no such swarm"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/init:
post:
summary: "Initialize a new swarm"
operationId: "SwarmInit"
produces:
- "application/json"
- "text/plain"
responses:
200:
description: "no error"
schema:
description: "The node ID"
type: "string"
example: "7v2t30z9blmxuhnyo6s4cpenp"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmInitRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication, as well
as determining the networking interface used for the VXLAN
Tunnel Endpoint (VTEP). This can either be an address/port
combination in the form `192.168.1.1:4567`, or an interface
followed by a port number, like `eth0:4567`. If the port number
is omitted, the default swarm listening port is used.
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
if no port is set or is set to 0, default port 4789 will be used.
type: "integer"
format: "uint32"
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global
scope networks.
type: "array"
items:
type: "string"
example: ["10.10.0.0/16", "20.20.0.0/16"]
ForceNewCluster:
description: "Force creation of a new swarm."
type: "boolean"
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created
from the default subnet pool.
type: "integer"
format: "uint32"
Spec:
$ref: "#/definitions/SwarmSpec"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
DataPathPort: 4789
DefaultAddrPool: ["10.10.0.0/8", "20.20.0.0/8"]
SubnetSize: 24
ForceNewCluster: false
Spec:
Orchestration: {}
Raft: {}
Dispatcher: {}
CAConfig: {}
EncryptionConfig:
AutoLockManagers: false
tags: ["Swarm"]
/swarm/join:
post:
summary: "Join an existing swarm"
operationId: "SwarmJoin"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmJoinRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication if the node
gets promoted to manager, as well as determining the networking
interface used for the VXLAN Tunnel Endpoint (VTEP).
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
RemoteAddrs:
description: |
Addresses of manager nodes already participating in the swarm.
type: "array"
items:
type: "string"
JoinToken:
description: "Secret token for joining this swarm."
type: "string"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
RemoteAddrs:
- "node1:2377"
JoinToken: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
tags: ["Swarm"]
/swarm/leave:
post:
summary: "Leave a swarm"
operationId: "SwarmLeave"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "force"
description: |
Force leave swarm, even if this is the last manager or that it will
break the cluster.
in: "query"
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/update:
post:
summary: "Update a swarm"
operationId: "SwarmUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
$ref: "#/definitions/SwarmSpec"
- name: "version"
in: "query"
description: |
The version number of the swarm object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
- name: "rotateWorkerToken"
in: "query"
description: "Rotate the worker join token."
type: "boolean"
default: false
- name: "rotateManagerToken"
in: "query"
description: "Rotate the manager join token."
type: "boolean"
default: false
- name: "rotateManagerUnlockKey"
in: "query"
description: "Rotate the manager unlock key."
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/unlockkey:
get:
summary: "Get the unlock key"
operationId: "SwarmUnlockkey"
consumes:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "UnlockKeyResponse"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/unlock:
post:
summary: "Unlock a locked manager"
operationId: "SwarmUnlock"
consumes:
- "application/json"
produces:
- "application/json"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmUnlockRequest"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/services:
get:
summary: "List services"
operationId: "ServiceList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Service"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the services list.
Available filters:
- `id=<service id>`
- `label=<service label>`
- `mode=["replicated"|"global"]`
- `name=<service name>`
- name: "status"
in: "query"
type: "boolean"
description: |
Include service status, with count of running and desired tasks.
tags: ["Service"]
/services/create:
post:
summary: "Create a service"
operationId: "ServiceCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
type: "object"
title: "ServiceCreateResponse"
properties:
ID:
description: "The ID of the created service."
type: "string"
Warning:
description: "Optional warning message"
type: "string"
example:
ID: "ak7w3gjqoa3kuz8xcpnyy0pvl"
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
403:
description: "network is not eligible for services"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "name conflicts with an existing service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "web"
TaskTemplate:
ContainerSpec:
Image: "nginx:alpine"
Mounts:
-
ReadOnly: true
Source: "web-data"
Target: "/usr/share/nginx/html"
Type: "volume"
VolumeOptions:
DriverConfig: {}
Labels:
com.example.something: "something-value"
Hosts: ["10.10.10.10 host1", "ABCD:EF01:2345:6789:ABCD:EF01:2345:6789 host2"]
User: "33"
DNSConfig:
Nameservers: ["8.8.8.8"]
Search: ["example.org"]
Options: ["timeout:3"]
Secrets:
-
File:
Name: "www.example.org.key"
UID: "33"
GID: "33"
Mode: 384
SecretID: "fpjqlhnwb19zds35k8wn80lq9"
SecretName: "example_org_domain_key"
LogDriver:
Name: "json-file"
Options:
max-file: "3"
max-size: "10M"
Placement: {}
Resources:
Limits:
MemoryBytes: 104857600
Reservations: {}
RestartPolicy:
Condition: "on-failure"
Delay: 10000000000
MaxAttempts: 10
Mode:
Replicated:
Replicas: 4
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Ports:
-
Protocol: "tcp"
PublishedPort: 8080
TargetPort: 80
Labels:
foo: "bar"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}:
get:
summary: "Inspect a service"
operationId: "ServiceInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Service"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "insertDefaults"
in: "query"
description: "Fill empty fields with default values."
type: "boolean"
default: false
tags: ["Service"]
delete:
summary: "Delete a service"
operationId: "ServiceDelete"
responses:
200:
description: "no error"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
tags: ["Service"]
/services/{id}/update:
post:
summary: "Update a service"
operationId: "ServiceUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/ServiceUpdateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "top"
TaskTemplate:
ContainerSpec:
Image: "busybox"
Args:
- "top"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
- name: "version"
in: "query"
description: |
The version number of the service object being updated. This is
required to avoid conflicting writes.
This version number should be the value as currently set on the
service *before* the update. You can find the current version by
calling `GET /services/{id}`
required: true
type: "integer"
- name: "registryAuthFrom"
in: "query"
description: |
If the `X-Registry-Auth` header is not specified, this parameter
indicates where to find registry authorization credentials.
type: "string"
enum: ["spec", "previous-spec"]
default: "spec"
- name: "rollback"
in: "query"
description: |
Set to this parameter to `previous` to cause a server-side rollback
to the previous service spec. The supplied spec will be ignored in
this case.
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}/logs:
get:
summary: "Get service logs"
description: |
Get `stdout` and `stderr` logs from a service. See also
[`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ServiceLogs"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such service: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the service"
type: "string"
- name: "details"
in: "query"
description: "Show service context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Service"]
/tasks:
get:
summary: "List tasks"
operationId: "TaskList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Task"
example:
- ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
- ID: "1yljwbmlr8er2waf8orvqpwms"
Version:
Index: 30
CreatedAt: "2016-06-07T21:07:30.019104782Z"
UpdatedAt: "2016-06-07T21:07:30.231958098Z"
Name: "hopeful_cori"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:30.202183143Z"
State: "shutdown"
Message: "shutdown"
ContainerStatus:
ContainerID: "1cf8d63d18e79668b0004a4be4c6ee58cddfad2dae29506d8781581d0688a213"
DesiredState: "shutdown"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.5/16"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the tasks list.
Available filters:
- `desired-state=(running | shutdown | accepted)`
- `id=<task id>`
- `label=key` or `label="key=value"`
- `name=<task name>`
- `node=<node id or name>`
- `service=<service name>`
tags: ["Task"]
/tasks/{id}:
get:
summary: "Inspect a task"
operationId: "TaskInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Task"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID of the task"
required: true
type: "string"
tags: ["Task"]
/tasks/{id}/logs:
get:
summary: "Get task logs"
description: |
Get `stdout` and `stderr` logs from a task.
See also [`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
operationId: "TaskLogs"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such task: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID of the task"
type: "string"
- name: "details"
in: "query"
description: "Show task context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Task"]
/secrets:
get:
summary: "List secrets"
operationId: "SecretList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Secret"
example:
- ID: "blt1owaxmitz71s9v5zh81zun"
Version:
Index: 85
CreatedAt: "2017-07-20T13:55:28.678958722Z"
UpdatedAt: "2017-07-20T13:55:28.678958722Z"
Spec:
Name: "mysql-passwd"
Labels:
some.label: "some.value"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the secrets list.
Available filters:
- `id=<secret id>`
- `label=<key> or label=<key>=value`
- `name=<secret name>`
- `names=<secret name>`
tags: ["Secret"]
/secrets/create:
post:
summary: "Create a secret"
operationId: "SecretCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/SecretSpec"
- type: "object"
example:
Name: "app-key.crt"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
tags: ["Secret"]
/secrets/{id}:
get:
summary: "Inspect a secret"
operationId: "SecretInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Secret"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
delete:
summary: "Delete a secret"
operationId: "SecretDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
/secrets/{id}/update:
post:
summary: "Update a Secret"
operationId: "SecretUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such secret"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the secret"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/SecretSpec"
description: |
The spec of the secret to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[SecretInspect endpoint](#operation/SecretInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the secret object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Secret"]
/configs:
get:
summary: "List configs"
operationId: "ConfigList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Config"
example:
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "server.conf"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the configs list.
Available filters:
- `id=<config id>`
- `label=<key> or label=<key>=value`
- `name=<config name>`
- `names=<config name>`
tags: ["Config"]
/configs/create:
post:
summary: "Create a config"
operationId: "ConfigCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/ConfigSpec"
- type: "object"
example:
Name: "server.conf"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
tags: ["Config"]
/configs/{id}:
get:
summary: "Inspect a config"
operationId: "ConfigInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Config"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
delete:
summary: "Delete a config"
operationId: "ConfigDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
/configs/{id}/update:
post:
summary: "Update a Config"
operationId: "ConfigUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such config"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the config"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/ConfigSpec"
description: |
The spec of the config to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[ConfigInspect endpoint](#operation/ConfigInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the config object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Config"]
/distribution/{name}/json:
get:
summary: "Get image information from the registry"
description: |
Return image digest and platform information by contacting the registry.
operationId: "DistributionInspect"
produces:
- "application/json"
responses:
200:
description: "descriptor and platform information"
schema:
$ref: "#/definitions/DistributionInspect"
401:
description: "Failed authentication or no image found"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Distribution"]
/session:
post:
summary: "Initialize interactive session"
description: |
Start a new interactive session with a server. Session allows server to
call back to the client for advanced capabilities.
### Hijacking
This endpoint hijacks the HTTP connection to HTTP2 transport that allows
the client to expose gPRC services on that connection.
For example, the client sends this request to upgrade the connection:
```
POST /session HTTP/1.1
Upgrade: h2c
Connection: Upgrade
```
The Docker daemon responds with a `101 UPGRADED` response follow with
the raw stream:
```
HTTP/1.1 101 UPGRADED
Connection: Upgrade
Upgrade: h2c
```
operationId: "Session"
produces:
- "application/vnd.docker.raw-stream"
responses:
101:
description: "no error, hijacking successful"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Session"]
| # A Swagger 2.0 (a.k.a. OpenAPI) definition of the Engine API.
#
# This is used for generating API documentation and the types used by the
# client/server. See api/README.md for more information.
#
# Some style notes:
# - This file is used by ReDoc, which allows GitHub Flavored Markdown in
# descriptions.
# - There is no maximum line length, for ease of editing and pretty diffs.
# - operationIds are in the format "NounVerb", with a singular noun.
swagger: "2.0"
schemes:
- "http"
- "https"
produces:
- "application/json"
- "text/plain"
consumes:
- "application/json"
- "text/plain"
basePath: "/v1.42"
info:
title: "Docker Engine API"
version: "1.42"
x-logo:
url: "https://docs.docker.com/images/logo-docker-main.png"
description: |
The Engine API is an HTTP API served by Docker Engine. It is the API the
Docker client uses to communicate with the Engine, so everything the Docker
client can do can be done with the API.
Most of the client's commands map directly to API endpoints (e.g. `docker ps`
is `GET /containers/json`). The notable exception is running containers,
which consists of several API calls.
# Errors
The API uses standard HTTP status codes to indicate the success or failure
of the API call. The body of the response will be JSON in the following
format:
```
{
"message": "page not found"
}
```
# Versioning
The API is usually changed in each release, so API calls are versioned to
ensure that clients don't break. To lock to a specific version of the API,
you prefix the URL with its version, for example, call `/v1.30/info` to use
the v1.30 version of the `/info` endpoint. If the API version specified in
the URL is not supported by the daemon, a HTTP `400 Bad Request` error message
is returned.
If you omit the version-prefix, the current version of the API (v1.42) is used.
For example, calling `/info` is the same as calling `/v1.42/info`. Using the
API without a version-prefix is deprecated and will be removed in a future release.
Engine releases in the near future should support this version of the API,
so your client will continue to work even if it is talking to a newer Engine.
The API uses an open schema model, which means server may add extra properties
to responses. Likewise, the server will ignore any extra query parameters and
request body properties. When you write clients, you need to ignore additional
properties in responses to ensure they do not break when talking to newer
daemons.
# Authentication
Authentication for registries is handled client side. The client has to send
authentication details to various endpoints that need to communicate with
registries, such as `POST /images/(name)/push`. These are sent as
`X-Registry-Auth` header as a [base64url encoded](https://tools.ietf.org/html/rfc4648#section-5)
(JSON) string with the following structure:
```
{
"username": "string",
"password": "string",
"email": "string",
"serveraddress": "string"
}
```
The `serveraddress` is a domain/IP without a protocol. Throughout this
structure, double quotes are required.
If you have already got an identity token from the [`/auth` endpoint](#operation/SystemAuth),
you can just pass this instead of credentials:
```
{
"identitytoken": "9cbaf023786cd7..."
}
```
# The tags on paths define the menu sections in the ReDoc documentation, so
# the usage of tags must make sense for that:
# - They should be singular, not plural.
# - There should not be too many tags, or the menu becomes unwieldy. For
# example, it is preferable to add a path to the "System" tag instead of
# creating a tag with a single path in it.
# - The order of tags in this list defines the order in the menu.
tags:
# Primary objects
- name: "Container"
x-displayName: "Containers"
description: |
Create and manage containers.
- name: "Image"
x-displayName: "Images"
- name: "Network"
x-displayName: "Networks"
description: |
Networks are user-defined networks that containers can be attached to.
See the [networking documentation](https://docs.docker.com/network/)
for more information.
- name: "Volume"
x-displayName: "Volumes"
description: |
Create and manage persistent storage that can be attached to containers.
- name: "Exec"
x-displayName: "Exec"
description: |
Run new commands inside running containers. Refer to the
[command-line reference](https://docs.docker.com/engine/reference/commandline/exec/)
for more information.
To exec a command in a container, you first need to create an exec instance,
then start it. These two API endpoints are wrapped up in a single command-line
command, `docker exec`.
# Swarm things
- name: "Swarm"
x-displayName: "Swarm"
description: |
Engines can be clustered together in a swarm. Refer to the
[swarm mode documentation](https://docs.docker.com/engine/swarm/)
for more information.
- name: "Node"
x-displayName: "Nodes"
description: |
Nodes are instances of the Engine participating in a swarm. Swarm mode
must be enabled for these endpoints to work.
- name: "Service"
x-displayName: "Services"
description: |
Services are the definitions of tasks to run on a swarm. Swarm mode must
be enabled for these endpoints to work.
- name: "Task"
x-displayName: "Tasks"
description: |
A task is a container running on a swarm. It is the atomic scheduling unit
of swarm. Swarm mode must be enabled for these endpoints to work.
- name: "Secret"
x-displayName: "Secrets"
description: |
Secrets are sensitive data that can be used by services. Swarm mode must
be enabled for these endpoints to work.
- name: "Config"
x-displayName: "Configs"
description: |
Configs are application configurations that can be used by services. Swarm
mode must be enabled for these endpoints to work.
# System things
- name: "Plugin"
x-displayName: "Plugins"
- name: "System"
x-displayName: "System"
definitions:
Port:
type: "object"
description: "An open port on a container"
required: [PrivatePort, Type]
properties:
IP:
type: "string"
format: "ip-address"
description: "Host IP address that the container's port is mapped to"
PrivatePort:
type: "integer"
format: "uint16"
x-nullable: false
description: "Port on the container"
PublicPort:
type: "integer"
format: "uint16"
description: "Port exposed on the host"
Type:
type: "string"
x-nullable: false
enum: ["tcp", "udp", "sctp"]
example:
PrivatePort: 8080
PublicPort: 80
Type: "tcp"
MountPoint:
type: "object"
description: |
MountPoint represents a mount point configuration inside the container.
This is used for reporting the mountpoints in use by a container.
properties:
Type:
description: |
The mount type:
- `bind` a mount of a file or directory from the host into the container.
- `volume` a docker volume with the given `Name`.
- `tmpfs` a `tmpfs`.
- `npipe` a named pipe from the host into the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
example: "volume"
Name:
description: |
Name is the name reference to the underlying data defined by `Source`
e.g., the volume name.
type: "string"
example: "myvolume"
Source:
description: |
Source location of the mount.
For volumes, this contains the storage location of the volume (within
`/var/lib/docker/volumes/`). For bind-mounts, and `npipe`, this contains
the source (host) part of the bind-mount. For `tmpfs` mount points, this
field is empty.
type: "string"
example: "/var/lib/docker/volumes/myvolume/_data"
Destination:
description: |
Destination is the path relative to the container root (`/`) where
the `Source` is mounted inside the container.
type: "string"
example: "/usr/share/nginx/html/"
Driver:
description: |
Driver is the volume driver used to create the volume (if it is a volume).
type: "string"
example: "local"
Mode:
description: |
Mode is a comma separated list of options supplied by the user when
creating the bind/volume mount.
The default is platform-specific (`"z"` on Linux, empty on Windows).
type: "string"
example: "z"
RW:
description: |
Whether the mount is mounted writable (read-write).
type: "boolean"
example: true
Propagation:
description: |
Propagation describes how mounts are propagated from the host into the
mount point, and vice-versa. Refer to the [Linux kernel documentation](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt)
for details. This field is not used on Windows.
type: "string"
example: ""
DeviceMapping:
type: "object"
description: "A device mapping between the host and container"
properties:
PathOnHost:
type: "string"
PathInContainer:
type: "string"
CgroupPermissions:
type: "string"
example:
PathOnHost: "/dev/deviceName"
PathInContainer: "/dev/deviceName"
CgroupPermissions: "mrw"
DeviceRequest:
type: "object"
description: "A request for devices to be sent to device drivers"
properties:
Driver:
type: "string"
example: "nvidia"
Count:
type: "integer"
example: -1
DeviceIDs:
type: "array"
items:
type: "string"
example:
- "0"
- "1"
- "GPU-fef8089b-4820-abfc-e83e-94318197576e"
Capabilities:
description: |
A list of capabilities; an OR list of AND lists of capabilities.
type: "array"
items:
type: "array"
items:
type: "string"
example:
# gpu AND nvidia AND compute
- ["gpu", "nvidia", "compute"]
Options:
description: |
Driver-specific options, specified as a key/value pairs. These options
are passed directly to the driver.
type: "object"
additionalProperties:
type: "string"
ThrottleDevice:
type: "object"
properties:
Path:
description: "Device path"
type: "string"
Rate:
description: "Rate"
type: "integer"
format: "int64"
minimum: 0
Mount:
type: "object"
properties:
Target:
description: "Container path."
type: "string"
Source:
description: "Mount source (e.g. a volume name, a host path)."
type: "string"
Type:
description: |
The mount type. Available types:
- `bind` Mounts a file or directory from the host into the container. Must exist prior to creating the container.
- `volume` Creates a volume with the given name and options (or uses a pre-existing volume with the same name and options). These are **not** removed when the container is removed.
- `tmpfs` Create a tmpfs with the given options. The mount source cannot be specified for tmpfs.
- `npipe` Mounts a named pipe from the host into the container. Must exist prior to creating the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
ReadOnly:
description: "Whether the mount should be read-only."
type: "boolean"
Consistency:
description: "The consistency requirement for the mount: `default`, `consistent`, `cached`, or `delegated`."
type: "string"
BindOptions:
description: "Optional configuration for the `bind` type."
type: "object"
properties:
Propagation:
description: "A propagation mode with the value `[r]private`, `[r]shared`, or `[r]slave`."
type: "string"
enum:
- "private"
- "rprivate"
- "shared"
- "rshared"
- "slave"
- "rslave"
NonRecursive:
description: "Disable recursive bind mount."
type: "boolean"
default: false
VolumeOptions:
description: "Optional configuration for the `volume` type."
type: "object"
properties:
NoCopy:
description: "Populate volume with data from the target."
type: "boolean"
default: false
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
DriverConfig:
description: "Map of driver specific options"
type: "object"
properties:
Name:
description: "Name of the driver to use to create the volume."
type: "string"
Options:
description: "key/value map of driver specific options."
type: "object"
additionalProperties:
type: "string"
TmpfsOptions:
description: "Optional configuration for the `tmpfs` type."
type: "object"
properties:
SizeBytes:
description: "The size for the tmpfs mount in bytes."
type: "integer"
format: "int64"
Mode:
description: "The permission mode for the tmpfs mount in an integer."
type: "integer"
RestartPolicy:
description: |
The behavior to apply when the container exits. The default is not to
restart.
An ever increasing delay (double the previous delay, starting at 100ms) is
added before each restart to prevent flooding the server.
type: "object"
properties:
Name:
type: "string"
description: |
- Empty string means not to restart
- `no` Do not automatically restart
- `always` Always restart
- `unless-stopped` Restart always except when the user has manually stopped the container
- `on-failure` Restart only when the container exit code is non-zero
enum:
- ""
- "no"
- "always"
- "unless-stopped"
- "on-failure"
MaximumRetryCount:
type: "integer"
description: |
If `on-failure` is used, the number of times to retry before giving up.
Resources:
description: "A container's resources (cgroups config, ulimits, etc)"
type: "object"
properties:
# Applicable to all platforms
CpuShares:
description: |
An integer value representing this container's relative CPU weight
versus other containers.
type: "integer"
Memory:
description: "Memory limit in bytes."
type: "integer"
format: "int64"
default: 0
# Applicable to UNIX platforms
CgroupParent:
description: |
Path to `cgroups` under which the container's `cgroup` is created. If
the path is not absolute, the path is considered to be relative to the
`cgroups` path of the init process. Cgroups are created if they do not
already exist.
type: "string"
BlkioWeight:
description: "Block IO weight (relative weight)."
type: "integer"
minimum: 0
maximum: 1000
BlkioWeightDevice:
description: |
Block IO weight (relative device weight) in the form:
```
[{"Path": "device_path", "Weight": weight}]
```
type: "array"
items:
type: "object"
properties:
Path:
type: "string"
Weight:
type: "integer"
minimum: 0
BlkioDeviceReadBps:
description: |
Limit read rate (bytes per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteBps:
description: |
Limit write rate (bytes per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceReadIOps:
description: |
Limit read rate (IO per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteIOps:
description: |
Limit write rate (IO per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
CpuPeriod:
description: "The length of a CPU period in microseconds."
type: "integer"
format: "int64"
CpuQuota:
description: |
Microseconds of CPU time that the container can get in a CPU period.
type: "integer"
format: "int64"
CpuRealtimePeriod:
description: |
The length of a CPU real-time period in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpuRealtimeRuntime:
description: |
The length of a CPU real-time runtime in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpusetCpus:
description: |
CPUs in which to allow execution (e.g., `0-3`, `0,1`).
type: "string"
example: "0-3"
CpusetMems:
description: |
Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only
effective on NUMA systems.
type: "string"
Devices:
description: "A list of devices to add to the container."
type: "array"
items:
$ref: "#/definitions/DeviceMapping"
DeviceCgroupRules:
description: "a list of cgroup rules to apply to the container"
type: "array"
items:
type: "string"
example: "c 13:* rwm"
DeviceRequests:
description: |
A list of requests for devices to be sent to device drivers.
type: "array"
items:
$ref: "#/definitions/DeviceRequest"
KernelMemoryTCP:
description: |
Hard limit for kernel TCP buffer memory (in bytes). Depending on the
OCI runtime in use, this option may be ignored. It is no longer supported
by the default (runc) runtime.
This field is omitted when empty.
type: "integer"
format: "int64"
MemoryReservation:
description: "Memory soft limit in bytes."
type: "integer"
format: "int64"
MemorySwap:
description: |
Total memory limit (memory + swap). Set as `-1` to enable unlimited
swap.
type: "integer"
format: "int64"
MemorySwappiness:
description: |
Tune a container's memory swappiness behavior. Accepts an integer
between 0 and 100.
type: "integer"
format: "int64"
minimum: 0
maximum: 100
NanoCpus:
description: "CPU quota in units of 10<sup>-9</sup> CPUs."
type: "integer"
format: "int64"
OomKillDisable:
description: "Disable OOM Killer for the container."
type: "boolean"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
PidsLimit:
description: |
Tune a container's PIDs limit. Set `0` or `-1` for unlimited, or `null`
to not change.
type: "integer"
format: "int64"
x-nullable: true
Ulimits:
description: |
A list of resource limits to set in the container. For example:
```
{"Name": "nofile", "Soft": 1024, "Hard": 2048}
```
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
# Applicable to Windows
CpuCount:
description: |
The number of usable CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
CpuPercent:
description: |
The usable percentage of the available CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
IOMaximumIOps:
description: "Maximum IOps for the container system drive (Windows only)"
type: "integer"
format: "int64"
IOMaximumBandwidth:
description: |
Maximum IO in bytes per second for the container system drive
(Windows only).
type: "integer"
format: "int64"
Limit:
description: |
An object describing a limit on resources which can be requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
Pids:
description: |
Limits the maximum number of PIDs in the container. Set `0` for unlimited.
type: "integer"
format: "int64"
default: 0
example: 100
ResourceObject:
description: |
An object describing the resources which can be advertised by a node and
requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
GenericResources:
$ref: "#/definitions/GenericResources"
GenericResources:
description: |
User-defined resources can be either Integer resources (e.g, `SSD=3`) or
String resources (e.g, `GPU=UUID1`).
type: "array"
items:
type: "object"
properties:
NamedResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "string"
DiscreteResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "integer"
format: "int64"
example:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
HealthConfig:
description: "A test to perform to check that the container is healthy."
type: "object"
properties:
Test:
description: |
The test to perform. Possible values are:
- `[]` inherit healthcheck from image or parent image
- `["NONE"]` disable healthcheck
- `["CMD", args...]` exec arguments directly
- `["CMD-SHELL", command]` run command with system's default shell
type: "array"
items:
type: "string"
Interval:
description: |
The time to wait between checks in nanoseconds. It should be 0 or at
least 1000000 (1 ms). 0 means inherit.
type: "integer"
Timeout:
description: |
The time to wait before considering the check to have hung. It should
be 0 or at least 1000000 (1 ms). 0 means inherit.
type: "integer"
Retries:
description: |
The number of consecutive failures needed to consider a container as
unhealthy. 0 means inherit.
type: "integer"
StartPeriod:
description: |
Start period for the container to initialize before starting
health-retries countdown in nanoseconds. It should be 0 or at least
1000000 (1 ms). 0 means inherit.
type: "integer"
Health:
description: |
Health stores information about the container's healthcheck results.
type: "object"
x-nullable: true
properties:
Status:
description: |
Status is one of `none`, `starting`, `healthy` or `unhealthy`
- "none" Indicates there is no healthcheck
- "starting" Starting indicates that the container is not yet ready
- "healthy" Healthy indicates that the container is running correctly
- "unhealthy" Unhealthy indicates that the container has a problem
type: "string"
enum:
- "none"
- "starting"
- "healthy"
- "unhealthy"
example: "healthy"
FailingStreak:
description: "FailingStreak is the number of consecutive failures"
type: "integer"
example: 0
Log:
type: "array"
description: |
Log contains the last few results (oldest first)
items:
$ref: "#/definitions/HealthcheckResult"
HealthcheckResult:
description: |
HealthcheckResult stores information about a single run of a healthcheck probe
type: "object"
x-nullable: true
properties:
Start:
description: |
Date and time at which this check started in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "date-time"
example: "2020-01-04T10:44:24.496525531Z"
End:
description: |
Date and time at which this check ended in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2020-01-04T10:45:21.364524523Z"
ExitCode:
description: |
ExitCode meanings:
- `0` healthy
- `1` unhealthy
- `2` reserved (considered unhealthy)
- other values: error running probe
type: "integer"
example: 0
Output:
description: "Output from last check"
type: "string"
HostConfig:
description: "Container configuration that depends on the host we are running on"
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
# Applicable to all platforms
Binds:
type: "array"
description: |
A list of volume bindings for this container. Each volume binding
is a string in one of these forms:
- `host-src:container-dest[:options]` to bind-mount a host path
into the container. Both `host-src`, and `container-dest` must
be an _absolute_ path.
- `volume-name:container-dest[:options]` to bind-mount a volume
managed by a volume driver into the container. `container-dest`
must be an _absolute_ path.
`options` is an optional, comma-delimited list of:
- `nocopy` disables automatic copying of data from the container
path to the volume. The `nocopy` flag only applies to named volumes.
- `[ro|rw]` mounts a volume read-only or read-write, respectively.
If omitted or set to `rw`, volumes are mounted read-write.
- `[z|Z]` applies SELinux labels to allow or deny multiple containers
to read and write to the same volume.
- `z`: a _shared_ content label is applied to the content. This
label indicates that multiple containers can share the volume
content, for both reading and writing.
- `Z`: a _private unshared_ label is applied to the content.
This label indicates that only the current container can use
a private volume. Labeling systems such as SELinux require
proper labels to be placed on volume content that is mounted
into a container. Without a label, the security system can
prevent a container's processes from using the content. By
default, the labels set by the host operating system are not
modified.
- `[[r]shared|[r]slave|[r]private]` specifies mount
[propagation behavior](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt).
This only applies to bind-mounted volumes, not internal volumes
or named volumes. Mount propagation requires the source mount
point (the location where the source directory is mounted in the
host operating system) to have the correct propagation properties.
For shared volumes, the source mount point must be set to `shared`.
For slave volumes, the mount must be set to either `shared` or
`slave`.
items:
type: "string"
ContainerIDFile:
type: "string"
description: "Path to a file where the container ID is written"
LogConfig:
type: "object"
description: "The logging configuration for this container"
properties:
Type:
type: "string"
enum:
- "json-file"
- "syslog"
- "journald"
- "gelf"
- "fluentd"
- "awslogs"
- "splunk"
- "etwlogs"
- "none"
Config:
type: "object"
additionalProperties:
type: "string"
NetworkMode:
type: "string"
description: |
Network mode to use for this container. Supported standard values
are: `bridge`, `host`, `none`, and `container:<name|id>`. Any
other value is taken as a custom network's name to which this
container should connect to.
PortBindings:
$ref: "#/definitions/PortMap"
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
AutoRemove:
type: "boolean"
description: |
Automatically remove the container when the container's process
exits. This has no effect if `RestartPolicy` is set.
VolumeDriver:
type: "string"
description: "Driver that this container uses to mount volumes."
VolumesFrom:
type: "array"
description: |
A list of volumes to inherit from another container, specified in
the form `<container name>[:<ro|rw>]`.
items:
type: "string"
Mounts:
description: |
Specification for mounts to be added to the container.
type: "array"
items:
$ref: "#/definitions/Mount"
# Applicable to UNIX platforms
CapAdd:
type: "array"
description: |
A list of kernel capabilities to add to the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CapDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CgroupnsMode:
type: "string"
enum:
- "private"
- "host"
description: |
cgroup namespace mode for the container. Possible values are:
- `"private"`: the container runs in its own private cgroup namespace
- `"host"`: use the host system's cgroup namespace
If not specified, the daemon default is used, which can either be `"private"`
or `"host"`, depending on daemon version, kernel support and configuration.
Dns:
type: "array"
description: "A list of DNS servers for the container to use."
items:
type: "string"
DnsOptions:
type: "array"
description: "A list of DNS options."
items:
type: "string"
DnsSearch:
type: "array"
description: "A list of DNS search domains."
items:
type: "string"
ExtraHosts:
type: "array"
description: |
A list of hostnames/IP mappings to add to the container's `/etc/hosts`
file. Specified in the form `["hostname:IP"]`.
items:
type: "string"
GroupAdd:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
IpcMode:
type: "string"
description: |
IPC sharing mode for the container. Possible values are:
- `"none"`: own private IPC namespace, with /dev/shm not mounted
- `"private"`: own private IPC namespace
- `"shareable"`: own private IPC namespace, with a possibility to share it with other containers
- `"container:<name|id>"`: join another (shareable) container's IPC namespace
- `"host"`: use the host system's IPC namespace
If not specified, daemon default is used, which can either be `"private"`
or `"shareable"`, depending on daemon version and configuration.
Cgroup:
type: "string"
description: "Cgroup to use for the container."
Links:
type: "array"
description: |
A list of links for the container in the form `container_name:alias`.
items:
type: "string"
OomScoreAdj:
type: "integer"
description: |
An integer value containing the score given to the container in
order to tune OOM killer preferences.
example: 500
PidMode:
type: "string"
description: |
Set the PID (Process) Namespace mode for the container. It can be
either:
- `"container:<name|id>"`: joins another container's PID namespace
- `"host"`: use the host's PID namespace inside the container
Privileged:
type: "boolean"
description: "Gives the container full access to the host."
PublishAllPorts:
type: "boolean"
description: |
Allocates an ephemeral host port for all of a container's
exposed ports.
Ports are de-allocated when the container stops and allocated when
the container starts. The allocated port might be changed when
restarting the container.
The port is selected from the ephemeral port range that depends on
the kernel. For example, on Linux the range is defined by
`/proc/sys/net/ipv4/ip_local_port_range`.
ReadonlyRootfs:
type: "boolean"
description: "Mount the container's root filesystem as read only."
SecurityOpt:
type: "array"
description: |
A list of string values to customize labels for MLS systems, such
as SELinux.
items:
type: "string"
StorageOpt:
type: "object"
description: |
Storage driver options for this container, in the form `{"size": "120G"}`.
additionalProperties:
type: "string"
Tmpfs:
type: "object"
description: |
A map of container directories which should be replaced by tmpfs
mounts, and their corresponding mount options. For example:
```
{ "/run": "rw,noexec,nosuid,size=65536k" }
```
additionalProperties:
type: "string"
UTSMode:
type: "string"
description: "UTS namespace to use for the container."
UsernsMode:
type: "string"
description: |
Sets the usernamespace mode for the container when usernamespace
remapping option is enabled.
ShmSize:
type: "integer"
description: |
Size of `/dev/shm` in bytes. If omitted, the system uses 64MB.
minimum: 0
Sysctls:
type: "object"
description: |
A list of kernel parameters (sysctls) to set in the container.
For example:
```
{"net.ipv4.ip_forward": "1"}
```
additionalProperties:
type: "string"
Runtime:
type: "string"
description: "Runtime to use with this container."
# Applicable to Windows
ConsoleSize:
type: "array"
description: |
Initial console size, as an `[height, width]` array. (Windows only)
minItems: 2
maxItems: 2
items:
type: "integer"
minimum: 0
Isolation:
type: "string"
description: |
Isolation technology of the container. (Windows only)
enum:
- "default"
- "process"
- "hyperv"
MaskedPaths:
type: "array"
description: |
The list of paths to be masked inside the container (this overrides
the default set of paths).
items:
type: "string"
ReadonlyPaths:
type: "array"
description: |
The list of paths to be set as read-only inside the container
(this overrides the default set of paths).
items:
type: "string"
ContainerConfig:
description: |
Configuration for a container that is portable between hosts.
When used as `ContainerConfig` field in an image, `ContainerConfig` is an
optional field containing the configuration of the container that was last
committed when creating the image.
Previous versions of Docker builder used this field to store build cache,
and it is not in active use anymore.
type: "object"
properties:
Hostname:
description: |
The hostname to use for the container, as a valid RFC 1123 hostname.
type: "string"
example: "439f4e91bd1d"
Domainname:
description: |
The domain name to use for the container.
type: "string"
User:
description: "The user that commands are run as inside the container."
type: "string"
AttachStdin:
description: "Whether to attach to `stdin`."
type: "boolean"
default: false
AttachStdout:
description: "Whether to attach to `stdout`."
type: "boolean"
default: true
AttachStderr:
description: "Whether to attach to `stderr`."
type: "boolean"
default: true
ExposedPorts:
description: |
An object mapping ports to an empty object in the form:
`{"<port>/<tcp|udp|sctp>": {}}`
type: "object"
x-nullable: true
additionalProperties:
type: "object"
enum:
- {}
default: {}
example: {
"80/tcp": {},
"443/tcp": {}
}
Tty:
description: |
Attach standard streams to a TTY, including `stdin` if it is not closed.
type: "boolean"
default: false
OpenStdin:
description: "Open `stdin`"
type: "boolean"
default: false
StdinOnce:
description: "Close `stdin` after one attached client disconnects"
type: "boolean"
default: false
Env:
description: |
A list of environment variables to set inside the container in the
form `["VAR=value", ...]`. A variable without `=` is removed from the
environment, rather than to have an empty value.
type: "array"
items:
type: "string"
example:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Cmd:
description: |
Command to run specified as a string or an array of strings.
type: "array"
items:
type: "string"
example: ["/bin/sh"]
Healthcheck:
$ref: "#/definitions/HealthConfig"
ArgsEscaped:
description: "Command is already escaped (Windows only)"
type: "boolean"
default: false
example: false
x-nullable: true
Image:
description: |
The name (or reference) of the image to use when creating the container,
or which was used when the container was created.
type: "string"
example: "example-image:1.0"
Volumes:
description: |
An object mapping mount point paths inside the container to empty
objects.
type: "object"
additionalProperties:
type: "object"
enum:
- {}
default: {}
WorkingDir:
description: "The working directory for commands to run in."
type: "string"
example: "/public/"
Entrypoint:
description: |
The entry point for the container as a string or an array of strings.
If the array consists of exactly one empty string (`[""]`) then the
entry point is reset to system default (i.e., the entry point used by
docker when there is no `ENTRYPOINT` instruction in the `Dockerfile`).
type: "array"
items:
type: "string"
example: []
NetworkDisabled:
description: "Disable networking for the container."
type: "boolean"
x-nullable: true
MacAddress:
description: "MAC address of the container."
type: "string"
x-nullable: true
OnBuild:
description: |
`ONBUILD` metadata that were defined in the image's `Dockerfile`.
type: "array"
x-nullable: true
items:
type: "string"
example: []
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
StopSignal:
description: |
Signal to stop a container as a string or unsigned integer.
type: "string"
example: "SIGTERM"
x-nullable: true
StopTimeout:
description: "Timeout to stop a container in seconds."
type: "integer"
default: 10
x-nullable: true
Shell:
description: |
Shell for when `RUN`, `CMD`, and `ENTRYPOINT` uses a shell.
type: "array"
x-nullable: true
items:
type: "string"
example: ["/bin/sh", "-c"]
NetworkingConfig:
description: |
NetworkingConfig represents the container's networking configuration for
each of its interfaces.
It is used for the networking configs specified in the `docker create`
and `docker network connect` commands.
type: "object"
properties:
EndpointsConfig:
description: |
A mapping of network name to endpoint configuration for that network.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
example:
# putting an example here, instead of using the example values from
# /definitions/EndpointSettings, because containers/create currently
# does not support attaching to multiple networks, so the example request
# would be confusing if it showed that multiple networks can be contained
# in the EndpointsConfig.
# TODO remove once we support multiple networks on container create (see https://github.com/moby/moby/blob/07e6b843594e061f82baa5fa23c2ff7d536c2a05/daemon/create.go#L323)
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
NetworkSettings:
description: "NetworkSettings exposes the network settings in the API"
type: "object"
properties:
Bridge:
description: Name of the network's bridge (for example, `docker0`).
type: "string"
example: "docker0"
SandboxID:
description: SandboxID uniquely represents a container's network stack.
type: "string"
example: "9d12daf2c33f5959c8bf90aa513e4f65b561738661003029ec84830cd503a0c3"
HairpinMode:
description: |
Indicates if hairpin NAT should be enabled on the virtual interface.
type: "boolean"
example: false
LinkLocalIPv6Address:
description: IPv6 unicast address using the link-local prefix.
type: "string"
example: "fe80::42:acff:fe11:1"
LinkLocalIPv6PrefixLen:
description: Prefix length of the IPv6 unicast address.
type: "integer"
example: "64"
Ports:
$ref: "#/definitions/PortMap"
SandboxKey:
description: SandboxKey identifies the sandbox
type: "string"
example: "/var/run/docker/netns/8ab54b426c38"
# TODO is SecondaryIPAddresses actually used?
SecondaryIPAddresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO is SecondaryIPv6Addresses actually used?
SecondaryIPv6Addresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO properties below are part of DefaultNetworkSettings, which is
# marked as deprecated since Docker 1.9 and to be removed in Docker v17.12
EndpointID:
description: |
EndpointID uniquely represents a service endpoint in a Sandbox.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.1"
GlobalIPv6Address:
description: |
Global IPv6 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 64
IPAddress:
description: |
IPv4 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address for this network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8:2::100"
MacAddress:
description: |
MAC address for the container on the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "02:42:ac:11:00:04"
Networks:
description: |
Information about all networks that the container is connected to.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Address:
description: Address represents an IPv4 or IPv6 IP address.
type: "object"
properties:
Addr:
description: IP address.
type: "string"
PrefixLen:
description: Mask length of the IP address.
type: "integer"
PortMap:
description: |
PortMap describes the mapping of container ports to host ports, using the
container's port-number and protocol as key in the format `<port>/<protocol>`,
for example, `80/udp`.
If a container's port is mapped for multiple protocols, separate entries
are added to the mapping table.
type: "object"
additionalProperties:
type: "array"
x-nullable: true
items:
$ref: "#/definitions/PortBinding"
example:
"443/tcp":
- HostIp: "127.0.0.1"
HostPort: "4443"
"80/tcp":
- HostIp: "0.0.0.0"
HostPort: "80"
- HostIp: "0.0.0.0"
HostPort: "8080"
"80/udp":
- HostIp: "0.0.0.0"
HostPort: "80"
"53/udp":
- HostIp: "0.0.0.0"
HostPort: "53"
"2377/tcp": null
PortBinding:
description: |
PortBinding represents a binding between a host IP address and a host
port.
type: "object"
properties:
HostIp:
description: "Host IP address that the container's port is mapped to."
type: "string"
example: "127.0.0.1"
HostPort:
description: "Host port number that the container's port is mapped to."
type: "string"
example: "4443"
GraphDriverData:
description: |
Information about the storage driver used to store the container's and
image's filesystem.
type: "object"
required: [Name, Data]
properties:
Name:
description: "Name of the storage driver."
type: "string"
x-nullable: false
example: "overlay2"
Data:
description: |
Low-level storage metadata, provided as key/value pairs.
This information is driver-specific, and depends on the storage-driver
in use, and should be used for informational purposes only.
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example: {
"MergedDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/merged",
"UpperDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/diff",
"WorkDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/work"
}
ImageInspect:
description: |
Information about an image in the local image cache.
type: "object"
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Parent:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
Comment:
description: |
Optional message that was set when committing or importing the image.
type: "string"
x-nullable: false
example: ""
Created:
description: |
Date and time at which the image was created, formatted in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
x-nullable: false
example: "2022-02-04T21:20:12.497794809Z"
Container:
description: |
The ID of the container that was used to create the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "65974bc86f1770ae4bff79f651ebdbce166ae9aada632ee3fa9af3a264911735"
ContainerConfig:
$ref: "#/definitions/ContainerConfig"
DockerVersion:
description: |
The version of Docker that was used to build the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "20.10.7"
Author:
description: |
Name of the author that was specified when committing the image, or as
specified through MAINTAINER (deprecated) in the Dockerfile.
type: "string"
x-nullable: false
example: ""
Config:
$ref: "#/definitions/ContainerConfig"
Architecture:
description: |
Hardware CPU architecture that the image runs on.
type: "string"
x-nullable: false
example: "arm"
Variant:
description: |
CPU architecture variant (presently ARM-only).
type: "string"
x-nullable: true
example: "v7"
Os:
description: |
Operating System the image is built to run on.
type: "string"
x-nullable: false
example: "linux"
OsVersion:
description: |
Operating System version the image is built to run on (especially
for Windows).
type: "string"
example: ""
x-nullable: true
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
GraphDriver:
$ref: "#/definitions/GraphDriverData"
RootFS:
description: |
Information about the image's RootFS, including the layer IDs.
type: "object"
required: [Type]
properties:
Type:
type: "string"
x-nullable: false
example: "layers"
Layers:
type: "array"
items:
type: "string"
example:
- "sha256:1834950e52ce4d5a88a1bbd131c537f4d0e56d10ff0dd69e66be3b7dfa9df7e6"
- "sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef"
Metadata:
description: |
Additional metadata of the image in the local cache. This information
is local to the daemon, and not part of the image itself.
type: "object"
properties:
LastTagTime:
description: |
Date and time at which the image was last tagged in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
This information is only available if the image was tagged locally,
and omitted otherwise.
type: "string"
format: "dateTime"
example: "2022-02-28T14:40:02.623929178Z"
x-nullable: true
ImageSummary:
type: "object"
required:
- Id
- ParentId
- RepoTags
- RepoDigests
- Created
- Size
- SharedSize
- VirtualSize
- Labels
- Containers
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
ParentId:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Created:
description: |
Date and time at which the image was created as a Unix timestamp
(number of seconds sinds EPOCH).
type: "integer"
x-nullable: false
example: "1644009612"
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
SharedSize:
description: |
Total size of image layers that are shared between this image and other
images.
This size is not calculated by default. `-1` indicates that the value
has not been set / calculated.
type: "integer"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
Labels:
description: "User-defined key/value metadata."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Containers:
description: |
Number of containers using this image. Includes both stopped and running
containers.
This size is not calculated by default, and depends on which API endpoint
is used. `-1` indicates that the value has not been set / calculated.
x-nullable: false
type: "integer"
example: 2
AuthConfig:
type: "object"
properties:
username:
type: "string"
password:
type: "string"
email:
type: "string"
serveraddress:
type: "string"
example:
username: "hannibal"
password: "xxxx"
serveraddress: "https://index.docker.io/v1/"
ProcessConfig:
type: "object"
properties:
privileged:
type: "boolean"
user:
type: "string"
tty:
type: "boolean"
entrypoint:
type: "string"
arguments:
type: "array"
items:
type: "string"
Volume:
type: "object"
required: [Name, Driver, Mountpoint, Labels, Scope, Options]
properties:
Name:
type: "string"
description: "Name of the volume."
x-nullable: false
example: "tardis"
Driver:
type: "string"
description: "Name of the volume driver used by the volume."
x-nullable: false
example: "custom"
Mountpoint:
type: "string"
description: "Mount path of the volume on the host."
x-nullable: false
example: "/var/lib/docker/volumes/tardis"
CreatedAt:
type: "string"
format: "dateTime"
description: "Date/Time the volume was created."
example: "2016-06-07T20:31:11.853781916Z"
Status:
type: "object"
description: |
Low-level details about the volume, provided by the volume driver.
Details are returned as a map with key/value pairs:
`{"key":"value","key2":"value2"}`.
The `Status` field is optional, and is omitted if the volume driver
does not support this feature.
additionalProperties:
type: "object"
example:
hello: "world"
Labels:
type: "object"
description: "User-defined key/value metadata."
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Scope:
type: "string"
description: |
The level at which the volume exists. Either `global` for cluster-wide,
or `local` for machine level.
default: "local"
x-nullable: false
enum: ["local", "global"]
example: "local"
ClusterVolume:
$ref: "#/definitions/ClusterVolume"
Options:
type: "object"
description: |
The driver specific options used when creating the volume.
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
UsageData:
type: "object"
x-nullable: true
x-go-name: "UsageData"
required: [Size, RefCount]
description: |
Usage details about the volume. This information is used by the
`GET /system/df` endpoint, and omitted in other endpoints.
properties:
Size:
type: "integer"
default: -1
description: |
Amount of disk space used by the volume (in bytes). This information
is only available for volumes created with the `"local"` volume
driver. For volumes created with other volume drivers, this field
is set to `-1` ("not available")
x-nullable: false
RefCount:
type: "integer"
default: -1
description: |
The number of containers referencing this volume. This field
is set to `-1` if the reference-count is not available.
x-nullable: false
VolumeCreateOptions:
description: "Volume configuration"
type: "object"
title: "VolumeConfig"
x-go-name: "CreateOptions"
properties:
Name:
description: |
The new volume's name. If not specified, Docker generates a name.
type: "string"
x-nullable: false
example: "tardis"
Driver:
description: "Name of the volume driver to use."
type: "string"
default: "local"
x-nullable: false
example: "custom"
DriverOpts:
description: |
A mapping of driver options and values. These options are
passed directly to the driver and are driver specific.
type: "object"
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
ClusterVolumeSpec:
$ref: "#/definitions/ClusterVolumeSpec"
VolumeListResponse:
type: "object"
title: "VolumeListResponse"
x-go-name: "ListResponse"
description: "Volume list response"
properties:
Volumes:
type: "array"
description: "List of volumes"
items:
$ref: "#/definitions/Volume"
Warnings:
type: "array"
description: |
Warnings that occurred when fetching the list of volumes.
items:
type: "string"
example: []
Network:
type: "object"
properties:
Name:
type: "string"
Id:
type: "string"
Created:
type: "string"
format: "dateTime"
Scope:
type: "string"
Driver:
type: "string"
EnableIPv6:
type: "boolean"
IPAM:
$ref: "#/definitions/IPAM"
Internal:
type: "boolean"
Attachable:
type: "boolean"
Ingress:
type: "boolean"
Containers:
type: "object"
additionalProperties:
$ref: "#/definitions/NetworkContainer"
Options:
type: "object"
additionalProperties:
type: "string"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
Name: "net01"
Id: "7d86d31b1478e7cca9ebed7e73aa0fdeec46c5ca29497431d3007d2d9e15ed99"
Created: "2016-10-19T04:33:30.360899459Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
IPAM:
Driver: "default"
Config:
- Subnet: "172.19.0.0/16"
Gateway: "172.19.0.1"
Options:
foo: "bar"
Internal: false
Attachable: false
Ingress: false
Containers:
19a4d5d687db25203351ed79d478946f861258f018fe384f229f2efa4b23513c:
Name: "test"
EndpointID: "628cadb8bcb92de107b2a1e516cbffe463e321f548feb37697cce00ad694f21a"
MacAddress: "02:42:ac:13:00:02"
IPv4Address: "172.19.0.2/16"
IPv6Address: ""
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
IPAM:
type: "object"
properties:
Driver:
description: "Name of the IPAM driver to use."
type: "string"
default: "default"
Config:
description: |
List of IPAM configuration options, specified as a map:
```
{"Subnet": <CIDR>, "IPRange": <CIDR>, "Gateway": <IP address>, "AuxAddress": <device_name:IP address>}
```
type: "array"
items:
$ref: "#/definitions/IPAMConfig"
Options:
description: "Driver-specific options, specified as a map."
type: "object"
additionalProperties:
type: "string"
IPAMConfig:
type: "object"
properties:
Subnet:
type: "string"
IPRange:
type: "string"
Gateway:
type: "string"
AuxiliaryAddresses:
type: "object"
additionalProperties:
type: "string"
NetworkContainer:
type: "object"
properties:
Name:
type: "string"
EndpointID:
type: "string"
MacAddress:
type: "string"
IPv4Address:
type: "string"
IPv6Address:
type: "string"
BuildInfo:
type: "object"
properties:
id:
type: "string"
stream:
type: "string"
error:
type: "string"
errorDetail:
$ref: "#/definitions/ErrorDetail"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
aux:
$ref: "#/definitions/ImageID"
BuildCache:
type: "object"
properties:
ID:
type: "string"
Parent:
type: "string"
Type:
type: "string"
Description:
type: "string"
InUse:
type: "boolean"
Shared:
type: "boolean"
Size:
description: |
Amount of disk space used by the build cache (in bytes).
type: "integer"
CreatedAt:
description: |
Date and time at which the build cache was created in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
LastUsedAt:
description: |
Date and time at which the build cache was last used in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
x-nullable: true
example: "2017-08-09T07:09:37.632105588Z"
UsageCount:
type: "integer"
ImageID:
type: "object"
description: "Image ID or Digest"
properties:
ID:
type: "string"
example:
ID: "sha256:85f05633ddc1c50679be2b16a0479ab6f7637f8884e0cfe0f4d20e1ebb3d6e7c"
CreateImageInfo:
type: "object"
properties:
id:
type: "string"
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
PushImageInfo:
type: "object"
properties:
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
ErrorDetail:
type: "object"
properties:
code:
type: "integer"
message:
type: "string"
ProgressDetail:
type: "object"
properties:
current:
type: "integer"
total:
type: "integer"
ErrorResponse:
description: "Represents an error."
type: "object"
required: ["message"]
properties:
message:
description: "The error message."
type: "string"
x-nullable: false
example:
message: "Something went wrong."
IdResponse:
description: "Response to an API call that returns just an Id"
type: "object"
required: ["Id"]
properties:
Id:
description: "The id of the newly created object."
type: "string"
x-nullable: false
EndpointSettings:
description: "Configuration for a network endpoint."
type: "object"
properties:
# Configurations
IPAMConfig:
$ref: "#/definitions/EndpointIPAMConfig"
Links:
type: "array"
items:
type: "string"
example:
- "container_1"
- "container_2"
Aliases:
type: "array"
items:
type: "string"
example:
- "server_x"
- "server_y"
# Operational data
NetworkID:
description: |
Unique ID of the network.
type: "string"
example: "08754567f1f40222263eab4102e1c733ae697e8e354aa9cd6e18d7402835292a"
EndpointID:
description: |
Unique ID for the service endpoint in a Sandbox.
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for this network.
type: "string"
example: "172.17.0.1"
IPAddress:
description: |
IPv4 address.
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address.
type: "string"
example: "2001:db8:2::100"
GlobalIPv6Address:
description: |
Global IPv6 address.
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
type: "integer"
format: "int64"
example: 64
MacAddress:
description: |
MAC address for the endpoint on this network.
type: "string"
example: "02:42:ac:11:00:04"
DriverOpts:
description: |
DriverOpts is a mapping of driver options and values. These options
are passed directly to the driver and are driver specific.
type: "object"
x-nullable: true
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
EndpointIPAMConfig:
description: |
EndpointIPAMConfig represents an endpoint's IPAM configuration.
type: "object"
x-nullable: true
properties:
IPv4Address:
type: "string"
example: "172.20.30.33"
IPv6Address:
type: "string"
example: "2001:db8:abcd::3033"
LinkLocalIPs:
type: "array"
items:
type: "string"
example:
- "169.254.34.68"
- "fe80::3468"
PluginMount:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Source, Destination, Type, Options]
properties:
Name:
type: "string"
x-nullable: false
example: "some-mount"
Description:
type: "string"
x-nullable: false
example: "This is a mount that's used by the plugin."
Settable:
type: "array"
items:
type: "string"
Source:
type: "string"
example: "/var/lib/docker/plugins/"
Destination:
type: "string"
x-nullable: false
example: "/mnt/state"
Type:
type: "string"
x-nullable: false
example: "bind"
Options:
type: "array"
items:
type: "string"
example:
- "rbind"
- "rw"
PluginDevice:
type: "object"
required: [Name, Description, Settable, Path]
x-nullable: false
properties:
Name:
type: "string"
x-nullable: false
Description:
type: "string"
x-nullable: false
Settable:
type: "array"
items:
type: "string"
Path:
type: "string"
example: "/dev/fuse"
PluginEnv:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
Description:
x-nullable: false
type: "string"
Settable:
type: "array"
items:
type: "string"
Value:
type: "string"
PluginInterfaceType:
type: "object"
x-nullable: false
required: [Prefix, Capability, Version]
properties:
Prefix:
type: "string"
x-nullable: false
Capability:
type: "string"
x-nullable: false
Version:
type: "string"
x-nullable: false
PluginPrivilege:
description: |
Describes a permission the user has to accept upon installing
the plugin.
type: "object"
x-go-name: "PluginPrivilege"
properties:
Name:
type: "string"
example: "network"
Description:
type: "string"
Value:
type: "array"
items:
type: "string"
example:
- "host"
Plugin:
description: "A plugin for the Engine API"
type: "object"
required: [Settings, Enabled, Config, Name]
properties:
Id:
type: "string"
example: "5724e2c8652da337ab2eedd19fc6fc0ec908e4bd907c7421bf6a8dfc70c4c078"
Name:
type: "string"
x-nullable: false
example: "tiborvass/sample-volume-plugin"
Enabled:
description:
True if the plugin is running. False if the plugin is not running,
only installed.
type: "boolean"
x-nullable: false
example: true
Settings:
description: "Settings that can be modified by users."
type: "object"
x-nullable: false
required: [Args, Devices, Env, Mounts]
properties:
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
type: "string"
example:
- "DEBUG=0"
Args:
type: "array"
items:
type: "string"
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PluginReference:
description: "plugin remote reference used to push/pull the plugin"
type: "string"
x-nullable: false
example: "localhost:5000/tiborvass/sample-volume-plugin:latest"
Config:
description: "The config of a plugin."
type: "object"
x-nullable: false
required:
- Description
- Documentation
- Interface
- Entrypoint
- WorkDir
- Network
- Linux
- PidHost
- PropagatedMount
- IpcHost
- Mounts
- Env
- Args
properties:
DockerVersion:
description: "Docker Version used to create the plugin"
type: "string"
x-nullable: false
example: "17.06.0-ce"
Description:
type: "string"
x-nullable: false
example: "A sample volume plugin for Docker"
Documentation:
type: "string"
x-nullable: false
example: "https://docs.docker.com/engine/extend/plugins/"
Interface:
description: "The interface between Docker and the plugin"
x-nullable: false
type: "object"
required: [Types, Socket]
properties:
Types:
type: "array"
items:
$ref: "#/definitions/PluginInterfaceType"
example:
- "docker.volumedriver/1.0"
Socket:
type: "string"
x-nullable: false
example: "plugins.sock"
ProtocolScheme:
type: "string"
example: "some.protocol/v1.0"
description: "Protocol to use for clients connecting to the plugin."
enum:
- ""
- "moby.plugins.http/v1"
Entrypoint:
type: "array"
items:
type: "string"
example:
- "/usr/bin/sample-volume-plugin"
- "/data"
WorkDir:
type: "string"
x-nullable: false
example: "/bin/"
User:
type: "object"
x-nullable: false
properties:
UID:
type: "integer"
format: "uint32"
example: 1000
GID:
type: "integer"
format: "uint32"
example: 1000
Network:
type: "object"
x-nullable: false
required: [Type]
properties:
Type:
x-nullable: false
type: "string"
example: "host"
Linux:
type: "object"
x-nullable: false
required: [Capabilities, AllowAllDevices, Devices]
properties:
Capabilities:
type: "array"
items:
type: "string"
example:
- "CAP_SYS_ADMIN"
- "CAP_SYSLOG"
AllowAllDevices:
type: "boolean"
x-nullable: false
example: false
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PropagatedMount:
type: "string"
x-nullable: false
example: "/mnt/volumes"
IpcHost:
type: "boolean"
x-nullable: false
example: false
PidHost:
type: "boolean"
x-nullable: false
example: false
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
$ref: "#/definitions/PluginEnv"
example:
- Name: "DEBUG"
Description: "If set, prints debug messages"
Settable: null
Value: "0"
Args:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
example: "args"
Description:
x-nullable: false
type: "string"
example: "command line arguments"
Settable:
type: "array"
items:
type: "string"
Value:
type: "array"
items:
type: "string"
rootfs:
type: "object"
properties:
type:
type: "string"
example: "layers"
diff_ids:
type: "array"
items:
type: "string"
example:
- "sha256:675532206fbf3030b8458f88d6e26d4eb1577688a25efec97154c94e8b6b4887"
- "sha256:e216a057b1cb1efc11f8a268f37ef62083e70b1b38323ba252e25ac88904a7e8"
ObjectVersion:
description: |
The version number of the object such as node, service, etc. This is needed
to avoid conflicting writes. The client must send the version number along
with the modified specification when updating these objects.
This approach ensures safe concurrency and determinism in that the change
on the object may not be applied if the version number has changed from the
last read. In other words, if two update requests specify the same base
version, only one of the requests can succeed. As a result, two separate
update requests that happen at the same time will not unintentionally
overwrite each other.
type: "object"
properties:
Index:
type: "integer"
format: "uint64"
example: 373531
NodeSpec:
type: "object"
properties:
Name:
description: "Name for the node."
type: "string"
example: "my-node"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Role:
description: "Role of the node."
type: "string"
enum:
- "worker"
- "manager"
example: "manager"
Availability:
description: "Availability of the node."
type: "string"
enum:
- "active"
- "pause"
- "drain"
example: "active"
example:
Availability: "active"
Name: "node-name"
Role: "manager"
Labels:
foo: "bar"
Node:
type: "object"
properties:
ID:
type: "string"
example: "24ifsmvkjbyhk"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the node was added to the swarm in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the node was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/NodeSpec"
Description:
$ref: "#/definitions/NodeDescription"
Status:
$ref: "#/definitions/NodeStatus"
ManagerStatus:
$ref: "#/definitions/ManagerStatus"
NodeDescription:
description: |
NodeDescription encapsulates the properties of the Node as reported by the
agent.
type: "object"
properties:
Hostname:
type: "string"
example: "bf3067039e47"
Platform:
$ref: "#/definitions/Platform"
Resources:
$ref: "#/definitions/ResourceObject"
Engine:
$ref: "#/definitions/EngineDescription"
TLSInfo:
$ref: "#/definitions/TLSInfo"
Platform:
description: |
Platform represents the platform (Arch/OS).
type: "object"
properties:
Architecture:
description: |
Architecture represents the hardware architecture (for example,
`x86_64`).
type: "string"
example: "x86_64"
OS:
description: |
OS represents the Operating System (for example, `linux` or `windows`).
type: "string"
example: "linux"
EngineDescription:
description: "EngineDescription provides information about an engine."
type: "object"
properties:
EngineVersion:
type: "string"
example: "17.06.0"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
foo: "bar"
Plugins:
type: "array"
items:
type: "object"
properties:
Type:
type: "string"
Name:
type: "string"
example:
- Type: "Log"
Name: "awslogs"
- Type: "Log"
Name: "fluentd"
- Type: "Log"
Name: "gcplogs"
- Type: "Log"
Name: "gelf"
- Type: "Log"
Name: "journald"
- Type: "Log"
Name: "json-file"
- Type: "Log"
Name: "logentries"
- Type: "Log"
Name: "splunk"
- Type: "Log"
Name: "syslog"
- Type: "Network"
Name: "bridge"
- Type: "Network"
Name: "host"
- Type: "Network"
Name: "ipvlan"
- Type: "Network"
Name: "macvlan"
- Type: "Network"
Name: "null"
- Type: "Network"
Name: "overlay"
- Type: "Volume"
Name: "local"
- Type: "Volume"
Name: "localhost:5000/vieux/sshfs:latest"
- Type: "Volume"
Name: "vieux/sshfs:latest"
TLSInfo:
description: |
Information about the issuer of leaf TLS certificates and the trusted root
CA certificate.
type: "object"
properties:
TrustRoot:
description: |
The root CA certificate(s) that are used to validate leaf TLS
certificates.
type: "string"
CertIssuerSubject:
description:
The base64-url-safe-encoded raw subject bytes of the issuer.
type: "string"
CertIssuerPublicKey:
description: |
The base64-url-safe-encoded raw public key bytes of the issuer.
type: "string"
example:
TrustRoot: |
-----BEGIN CERTIFICATE-----
MIIBajCCARCgAwIBAgIUbYqrLSOSQHoxD8CwG6Bi2PJi9c8wCgYIKoZIzj0EAwIw
EzERMA8GA1UEAxMIc3dhcm0tY2EwHhcNMTcwNDI0MjE0MzAwWhcNMzcwNDE5MjE0
MzAwWjATMREwDwYDVQQDEwhzd2FybS1jYTBZMBMGByqGSM49AgEGCCqGSM49AwEH
A0IABJk/VyMPYdaqDXJb/VXh5n/1Yuv7iNrxV3Qb3l06XD46seovcDWs3IZNV1lf
3Skyr0ofcchipoiHkXBODojJydSjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMB
Af8EBTADAQH/MB0GA1UdDgQWBBRUXxuRcnFjDfR/RIAUQab8ZV/n4jAKBggqhkjO
PQQDAgNIADBFAiAy+JTe6Uc3KyLCMiqGl2GyWGQqQDEcO3/YG36x7om65AIhAJvz
pxv6zFeVEkAEEkqIYi0omA9+CjanB/6Bz4n1uw8H
-----END CERTIFICATE-----
CertIssuerSubject: "MBMxETAPBgNVBAMTCHN3YXJtLWNh"
CertIssuerPublicKey: "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEmT9XIw9h1qoNclv9VeHmf/Vi6/uI2vFXdBveXTpcPjqx6i9wNazchk1XWV/dKTKvSh9xyGKmiIeRcE4OiMnJ1A=="
NodeStatus:
description: |
NodeStatus represents the status of a node.
It provides the current status of the node, as seen by the manager.
type: "object"
properties:
State:
$ref: "#/definitions/NodeState"
Message:
type: "string"
example: ""
Addr:
description: "IP address of the node."
type: "string"
example: "172.17.0.2"
NodeState:
description: "NodeState represents the state of a node."
type: "string"
enum:
- "unknown"
- "down"
- "ready"
- "disconnected"
example: "ready"
ManagerStatus:
description: |
ManagerStatus represents the status of a manager.
It provides the current status of a node's manager component, if the node
is a manager.
x-nullable: true
type: "object"
properties:
Leader:
type: "boolean"
default: false
example: true
Reachability:
$ref: "#/definitions/Reachability"
Addr:
description: |
The IP address and port at which the manager is reachable.
type: "string"
example: "10.0.0.46:2377"
Reachability:
description: "Reachability represents the reachability of a node."
type: "string"
enum:
- "unknown"
- "unreachable"
- "reachable"
example: "reachable"
SwarmSpec:
description: "User modifiable swarm configuration."
type: "object"
properties:
Name:
description: "Name of the swarm."
type: "string"
example: "default"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.corp.type: "production"
com.example.corp.department: "engineering"
Orchestration:
description: "Orchestration configuration."
type: "object"
x-nullable: true
properties:
TaskHistoryRetentionLimit:
description: |
The number of historic tasks to keep per instance or node. If
negative, never remove completed or failed tasks.
type: "integer"
format: "int64"
example: 10
Raft:
description: "Raft configuration."
type: "object"
properties:
SnapshotInterval:
description: "The number of log entries between snapshots."
type: "integer"
format: "uint64"
example: 10000
KeepOldSnapshots:
description: |
The number of snapshots to keep beyond the current snapshot.
type: "integer"
format: "uint64"
LogEntriesForSlowFollowers:
description: |
The number of log entries to keep around to sync up slow followers
after a snapshot is created.
type: "integer"
format: "uint64"
example: 500
ElectionTick:
description: |
The number of ticks that a follower will wait for a message from
the leader before becoming a candidate and starting an election.
`ElectionTick` must be greater than `HeartbeatTick`.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 3
HeartbeatTick:
description: |
The number of ticks between heartbeats. Every HeartbeatTick ticks,
the leader will send a heartbeat to the followers.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 1
Dispatcher:
description: "Dispatcher configuration."
type: "object"
x-nullable: true
properties:
HeartbeatPeriod:
description: |
The delay for an agent to send a heartbeat to the dispatcher.
type: "integer"
format: "int64"
example: 5000000000
CAConfig:
description: "CA configuration."
type: "object"
x-nullable: true
properties:
NodeCertExpiry:
description: "The duration node certificates are issued for."
type: "integer"
format: "int64"
example: 7776000000000000
ExternalCAs:
description: |
Configuration for forwarding signing requests to an external
certificate authority.
type: "array"
items:
type: "object"
properties:
Protocol:
description: |
Protocol for communication with the external CA (currently
only `cfssl` is supported).
type: "string"
enum:
- "cfssl"
default: "cfssl"
URL:
description: |
URL where certificate signing requests should be sent.
type: "string"
Options:
description: |
An object with key/value pairs that are interpreted as
protocol-specific options for the external CA driver.
type: "object"
additionalProperties:
type: "string"
CACert:
description: |
The root CA certificate (in PEM format) this external CA uses
to issue TLS certificates (assumed to be to the current swarm
root CA certificate if not provided).
type: "string"
SigningCACert:
description: |
The desired signing CA certificate for all swarm node TLS leaf
certificates, in PEM format.
type: "string"
SigningCAKey:
description: |
The desired signing CA key for all swarm node TLS leaf certificates,
in PEM format.
type: "string"
ForceRotate:
description: |
An integer whose purpose is to force swarm to generate a new
signing CA certificate and key, if none have been specified in
`SigningCACert` and `SigningCAKey`
format: "uint64"
type: "integer"
EncryptionConfig:
description: "Parameters related to encryption-at-rest."
type: "object"
properties:
AutoLockManagers:
description: |
If set, generate a key and use it to lock data stored on the
managers.
type: "boolean"
example: false
TaskDefaults:
description: "Defaults for creating tasks in this cluster."
type: "object"
properties:
LogDriver:
description: |
The log driver to use for tasks created in the orchestrator if
unspecified by a service.
Updating this value only affects new tasks. Existing tasks continue
to use their previously configured log driver until recreated.
type: "object"
properties:
Name:
description: |
The log driver to use as a default for new tasks.
type: "string"
example: "json-file"
Options:
description: |
Driver-specific options for the selectd log driver, specified
as key/value pairs.
type: "object"
additionalProperties:
type: "string"
example:
"max-file": "10"
"max-size": "100m"
# The Swarm information for `GET /info`. It is the same as `GET /swarm`, but
# without `JoinTokens`.
ClusterInfo:
description: |
ClusterInfo represents information about the swarm as is returned by the
"/info" endpoint. Join-tokens are not included.
x-nullable: true
type: "object"
properties:
ID:
description: "The ID of the swarm."
type: "string"
example: "abajmipo7b4xz5ip2nrla6b11"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the swarm was initialised in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the swarm was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/SwarmSpec"
TLSInfo:
$ref: "#/definitions/TLSInfo"
RootRotationInProgress:
description: |
Whether there is currently a root CA rotation in progress for the swarm
type: "boolean"
example: false
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
If no port is set or is set to 0, the default port (4789) is used.
type: "integer"
format: "uint32"
default: 4789
example: 4789
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global scope
networks.
type: "array"
items:
type: "string"
format: "CIDR"
example: ["10.10.0.0/16", "20.20.0.0/16"]
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created from the
default subnet pool.
type: "integer"
format: "uint32"
maximum: 29
default: 24
example: 24
JoinTokens:
description: |
JoinTokens contains the tokens workers and managers need to join the swarm.
type: "object"
properties:
Worker:
description: |
The token workers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx"
Manager:
description: |
The token managers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
Swarm:
type: "object"
allOf:
- $ref: "#/definitions/ClusterInfo"
- type: "object"
properties:
JoinTokens:
$ref: "#/definitions/JoinTokens"
TaskSpec:
description: "User modifiable task configuration."
type: "object"
properties:
PluginSpec:
type: "object"
description: |
Plugin spec for the service. *(Experimental release only.)*
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Name:
description: "The name or 'alias' to use for the plugin."
type: "string"
Remote:
description: "The plugin image reference to use."
type: "string"
Disabled:
description: "Disable the plugin once scheduled."
type: "boolean"
PluginPrivilege:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
ContainerSpec:
type: "object"
description: |
Container spec for the service.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Image:
description: "The image name to use for the container"
type: "string"
Labels:
description: "User-defined key/value data."
type: "object"
additionalProperties:
type: "string"
Command:
description: "The command to be run in the image."
type: "array"
items:
type: "string"
Args:
description: "Arguments to the command."
type: "array"
items:
type: "string"
Hostname:
description: |
The hostname to use for the container, as a valid
[RFC 1123](https://tools.ietf.org/html/rfc1123) hostname.
type: "string"
Env:
description: |
A list of environment variables in the form `VAR=value`.
type: "array"
items:
type: "string"
Dir:
description: "The working directory for commands to run in."
type: "string"
User:
description: "The user inside the container."
type: "string"
Groups:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
Privileges:
type: "object"
description: "Security options for the container"
properties:
CredentialSpec:
type: "object"
description: "CredentialSpec for managed service account (Windows only)"
properties:
Config:
type: "string"
example: "0bt9dmxjvjiqermk6xrop3ekq"
description: |
Load credential spec from a Swarm Config with the given ID.
The specified config must also be present in the Configs
field with the Runtime property set.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
File:
type: "string"
example: "spec.json"
description: |
Load credential spec from this file. The file is read by
the daemon, and must be present in the `CredentialSpecs`
subdirectory in the docker data directory, which defaults
to `C:\ProgramData\Docker\` on Windows.
For example, specifying `spec.json` loads
`C:\ProgramData\Docker\CredentialSpecs\spec.json`.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
Registry:
type: "string"
description: |
Load credential spec from this value in the Windows
registry. The specified registry value must be located in:
`HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\Containers\CredentialSpecs`
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
SELinuxContext:
type: "object"
description: "SELinux labels of the container"
properties:
Disable:
type: "boolean"
description: "Disable SELinux"
User:
type: "string"
description: "SELinux user label"
Role:
type: "string"
description: "SELinux role label"
Type:
type: "string"
description: "SELinux type label"
Level:
type: "string"
description: "SELinux level label"
TTY:
description: "Whether a pseudo-TTY should be allocated."
type: "boolean"
OpenStdin:
description: "Open `stdin`"
type: "boolean"
ReadOnly:
description: "Mount the container's root filesystem as read only."
type: "boolean"
Mounts:
description: |
Specification for mounts to be added to containers created as part
of the service.
type: "array"
items:
$ref: "#/definitions/Mount"
StopSignal:
description: "Signal to stop the container."
type: "string"
StopGracePeriod:
description: |
Amount of time to wait for the container to terminate before
forcefully killing it.
type: "integer"
format: "int64"
HealthCheck:
$ref: "#/definitions/HealthConfig"
Hosts:
type: "array"
description: |
A list of hostname/IP mappings to add to the container's `hosts`
file. The format of extra hosts is specified in the
[hosts(5)](http://man7.org/linux/man-pages/man5/hosts.5.html)
man page:
IP_address canonical_hostname [aliases...]
items:
type: "string"
DNSConfig:
description: |
Specification for DNS related configurations in resolver configuration
file (`resolv.conf`).
type: "object"
properties:
Nameservers:
description: "The IP addresses of the name servers."
type: "array"
items:
type: "string"
Search:
description: "A search list for host-name lookup."
type: "array"
items:
type: "string"
Options:
description: |
A list of internal resolver variables to be modified (e.g.,
`debug`, `ndots:3`, etc.).
type: "array"
items:
type: "string"
Secrets:
description: |
Secrets contains references to zero or more secrets that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
SecretID:
description: |
SecretID represents the ID of the specific secret that we're
referencing.
type: "string"
SecretName:
description: |
SecretName is the name of the secret that this references,
but this is just provided for lookup/display purposes. The
secret in the reference will be identified by its ID.
type: "string"
Configs:
description: |
Configs contains references to zero or more configs that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually exclusive
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
Runtime:
description: |
Runtime represents a target that is not mounted into the
container but is used by the task
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually
> exclusive
type: "object"
ConfigID:
description: |
ConfigID represents the ID of the specific config that we're
referencing.
type: "string"
ConfigName:
description: |
ConfigName is the name of the config that this references,
but this is just provided for lookup/display purposes. The
config in the reference will be identified by its ID.
type: "string"
Isolation:
type: "string"
description: |
Isolation technology of the containers running the service.
(Windows only)
enum:
- "default"
- "process"
- "hyperv"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
Sysctls:
description: |
Set kernel namedspaced parameters (sysctls) in the container.
The Sysctls option on services accepts the same sysctls as the
are supported on containers. Note that while the same sysctls are
supported, no guarantees or checks are made about their
suitability for a clustered environment, and it's up to the user
to determine whether a given sysctl will work properly in a
Service.
type: "object"
additionalProperties:
type: "string"
# This option is not used by Windows containers
CapabilityAdd:
type: "array"
description: |
A list of kernel capabilities to add to the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
- "CAP_SYS_ADMIN"
- "CAP_SYS_CHROOT"
- "CAP_SYSLOG"
CapabilityDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
Ulimits:
description: |
A list of resource limits to set in the container. For example: `{"Name": "nofile", "Soft": 1024, "Hard": 2048}`"
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
NetworkAttachmentSpec:
description: |
Read-only spec type for non-swarm containers attached to swarm overlay
networks.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
type: "object"
properties:
ContainerID:
description: "ID of the container represented by this task"
type: "string"
Resources:
description: |
Resource requirements which apply to each individual container created
as part of the service.
type: "object"
properties:
Limits:
description: "Define resources limits."
$ref: "#/definitions/Limit"
Reservation:
description: "Define resources reservation."
$ref: "#/definitions/ResourceObject"
RestartPolicy:
description: |
Specification for the restart policy which applies to containers
created as part of this service.
type: "object"
properties:
Condition:
description: "Condition for restart."
type: "string"
enum:
- "none"
- "on-failure"
- "any"
Delay:
description: "Delay between restart attempts."
type: "integer"
format: "int64"
MaxAttempts:
description: |
Maximum attempts to restart a given container before giving up
(default value is 0, which is ignored).
type: "integer"
format: "int64"
default: 0
Window:
description: |
Windows is the time window used to evaluate the restart policy
(default value is 0, which is unbounded).
type: "integer"
format: "int64"
default: 0
Placement:
type: "object"
properties:
Constraints:
description: |
An array of constraint expressions to limit the set of nodes where
a task can be scheduled. Constraint expressions can either use a
_match_ (`==`) or _exclude_ (`!=`) rule. Multiple constraints find
nodes that satisfy every expression (AND match). Constraints can
match node or Docker Engine labels as follows:
node attribute | matches | example
---------------------|--------------------------------|-----------------------------------------------
`node.id` | Node ID | `node.id==2ivku8v2gvtg4`
`node.hostname` | Node hostname | `node.hostname!=node-2`
`node.role` | Node role (`manager`/`worker`) | `node.role==manager`
`node.platform.os` | Node operating system | `node.platform.os==windows`
`node.platform.arch` | Node architecture | `node.platform.arch==x86_64`
`node.labels` | User-defined node labels | `node.labels.security==high`
`engine.labels` | Docker Engine's labels | `engine.labels.operatingsystem==ubuntu-14.04`
`engine.labels` apply to Docker Engine labels like operating system,
drivers, etc. Swarm administrators add `node.labels` for operational
purposes by using the [`node update endpoint`](#operation/NodeUpdate).
type: "array"
items:
type: "string"
example:
- "node.hostname!=node3.corp.example.com"
- "node.role!=manager"
- "node.labels.type==production"
- "node.platform.os==linux"
- "node.platform.arch==x86_64"
Preferences:
description: |
Preferences provide a way to make the scheduler aware of factors
such as topology. They are provided in order from highest to
lowest precedence.
type: "array"
items:
type: "object"
properties:
Spread:
type: "object"
properties:
SpreadDescriptor:
description: |
label descriptor, such as `engine.labels.az`.
type: "string"
example:
- Spread:
SpreadDescriptor: "node.labels.datacenter"
- Spread:
SpreadDescriptor: "node.labels.rack"
MaxReplicas:
description: |
Maximum number of replicas for per node (default value is 0, which
is unlimited)
type: "integer"
format: "int64"
default: 0
Platforms:
description: |
Platforms stores all the platforms that the service's image can
run on. This field is used in the platform filter for scheduling.
If empty, then the platform filter is off, meaning there are no
scheduling restrictions.
type: "array"
items:
$ref: "#/definitions/Platform"
ForceUpdate:
description: |
A counter that triggers an update even if no relevant parameters have
been changed.
type: "integer"
Runtime:
description: |
Runtime is the type of runtime specified for the task executor.
type: "string"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
LogDriver:
description: |
Specifies the log driver to use for tasks created from this spec. If
not present, the default one for the swarm will be used, finally
falling back to the engine default if not specified.
type: "object"
properties:
Name:
type: "string"
Options:
type: "object"
additionalProperties:
type: "string"
TaskState:
type: "string"
enum:
- "new"
- "allocated"
- "pending"
- "assigned"
- "accepted"
- "preparing"
- "ready"
- "starting"
- "running"
- "complete"
- "shutdown"
- "failed"
- "rejected"
- "remove"
- "orphaned"
Task:
type: "object"
properties:
ID:
description: "The ID of the task."
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Name:
description: "Name of the task."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Spec:
$ref: "#/definitions/TaskSpec"
ServiceID:
description: "The ID of the service this task is part of."
type: "string"
Slot:
type: "integer"
NodeID:
description: "The ID of the node that this task is on."
type: "string"
AssignedGenericResources:
$ref: "#/definitions/GenericResources"
Status:
type: "object"
properties:
Timestamp:
type: "string"
format: "dateTime"
State:
$ref: "#/definitions/TaskState"
Message:
type: "string"
Err:
type: "string"
ContainerStatus:
type: "object"
properties:
ContainerID:
type: "string"
PID:
type: "integer"
ExitCode:
type: "integer"
DesiredState:
$ref: "#/definitions/TaskState"
JobIteration:
description: |
If the Service this Task belongs to is a job-mode service, contains
the JobIteration of the Service this Task was created for. Absent if
the Task was created for a Replicated or Global Service.
$ref: "#/definitions/ObjectVersion"
example:
ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
AssignedGenericResources:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
ServiceSpec:
description: "User modifiable configuration for a service."
type: object
properties:
Name:
description: "Name of the service."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
TaskTemplate:
$ref: "#/definitions/TaskSpec"
Mode:
description: "Scheduling mode for the service."
type: "object"
properties:
Replicated:
type: "object"
properties:
Replicas:
type: "integer"
format: "int64"
Global:
type: "object"
ReplicatedJob:
description: |
The mode used for services with a finite number of tasks that run
to a completed state.
type: "object"
properties:
MaxConcurrent:
description: |
The maximum number of replicas to run simultaneously.
type: "integer"
format: "int64"
default: 1
TotalCompletions:
description: |
The total number of replicas desired to reach the Completed
state. If unset, will default to the value of `MaxConcurrent`
type: "integer"
format: "int64"
GlobalJob:
description: |
The mode used for services which run a task to the completed state
on each valid node.
type: "object"
UpdateConfig:
description: "Specification for the update strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be updated in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: "Amount of time between updates, in nanoseconds."
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an updated task fails to run, or stops running
during the update.
type: "string"
enum:
- "continue"
- "pause"
- "rollback"
Monitor:
description: |
Amount of time to monitor each updated task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during an update before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling out an updated task. Either
the old task is shut down before the new task is started, or the
new task is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
RollbackConfig:
description: "Specification for the rollback strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be rolled back in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: |
Amount of time between rollback iterations, in nanoseconds.
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an rolled back task fails to run, or stops
running during the rollback.
type: "string"
enum:
- "continue"
- "pause"
Monitor:
description: |
Amount of time to monitor each rolled back task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during a rollback before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling back a task. Either the old
task is shut down before the new task is started, or the new task
is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
EndpointSpec:
$ref: "#/definitions/EndpointSpec"
EndpointPortConfig:
type: "object"
properties:
Name:
type: "string"
Protocol:
type: "string"
enum:
- "tcp"
- "udp"
- "sctp"
TargetPort:
description: "The port inside the container."
type: "integer"
PublishedPort:
description: "The port on the swarm hosts."
type: "integer"
PublishMode:
description: |
The mode in which port is published.
<p><br /></p>
- "ingress" makes the target port accessible on every node,
regardless of whether there is a task for the service running on
that node or not.
- "host" bypasses the routing mesh and publish the port directly on
the swarm node where that service is running.
type: "string"
enum:
- "ingress"
- "host"
default: "ingress"
example: "ingress"
EndpointSpec:
description: "Properties that can be configured to access and load balance a service."
type: "object"
properties:
Mode:
description: |
The mode of resolution to use for internal load balancing between tasks.
type: "string"
enum:
- "vip"
- "dnsrr"
default: "vip"
Ports:
description: |
List of exposed ports that this service is accessible on from the
outside. Ports can only be provided if `vip` resolution mode is used.
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
Service:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ServiceSpec"
Endpoint:
type: "object"
properties:
Spec:
$ref: "#/definitions/EndpointSpec"
Ports:
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
VirtualIPs:
type: "array"
items:
type: "object"
properties:
NetworkID:
type: "string"
Addr:
type: "string"
UpdateStatus:
description: "The status of a service update."
type: "object"
properties:
State:
type: "string"
enum:
- "updating"
- "paused"
- "completed"
StartedAt:
type: "string"
format: "dateTime"
CompletedAt:
type: "string"
format: "dateTime"
Message:
type: "string"
ServiceStatus:
description: |
The status of the service's tasks. Provided only when requested as
part of a ServiceList operation.
type: "object"
properties:
RunningTasks:
description: |
The number of tasks for the service currently in the Running state.
type: "integer"
format: "uint64"
example: 7
DesiredTasks:
description: |
The number of tasks for the service desired to be running.
For replicated services, this is the replica count from the
service spec. For global services, this is computed by taking
count of all tasks for the service with a Desired State other
than Shutdown.
type: "integer"
format: "uint64"
example: 10
CompletedTasks:
description: |
The number of tasks for a job that are in the Completed state.
This field must be cross-referenced with the service type, as the
value of 0 may mean the service is not in a job mode, or it may
mean the job-mode service has no tasks yet Completed.
type: "integer"
format: "uint64"
JobStatus:
description: |
The status of the service when it is in one of ReplicatedJob or
GlobalJob modes. Absent on Replicated and Global mode services. The
JobIteration is an ObjectVersion, but unlike the Service's version,
does not need to be sent with an update request.
type: "object"
properties:
JobIteration:
description: |
JobIteration is a value increased each time a Job is executed,
successfully or otherwise. "Executed", in this case, means the
job as a whole has been started, not that an individual Task has
been launched. A job is "Executed" when its ServiceSpec is
updated. JobIteration can be used to disambiguate Tasks belonging
to different executions of a job. Though JobIteration will
increase with each subsequent execution, it may not necessarily
increase by 1, and so JobIteration should not be used to
$ref: "#/definitions/ObjectVersion"
LastExecution:
description: |
The last time, as observed by the server, that this job was
started.
type: "string"
format: "dateTime"
example:
ID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Version:
Index: 19
CreatedAt: "2016-06-07T21:05:51.880065305Z"
UpdatedAt: "2016-06-07T21:07:29.962229872Z"
Spec:
Name: "hopeful_cori"
TaskTemplate:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Endpoint:
Spec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
VirtualIPs:
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.2/16"
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.3/16"
ImageDeleteResponseItem:
type: "object"
properties:
Untagged:
description: "The image ID of an image that was untagged"
type: "string"
Deleted:
description: "The image ID of an image that was deleted"
type: "string"
ServiceUpdateResponse:
type: "object"
properties:
Warnings:
description: "Optional warning messages"
type: "array"
items:
type: "string"
example:
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
ContainerSummary:
type: "object"
properties:
Id:
description: "The ID of this container"
type: "string"
x-go-name: "ID"
Names:
description: "The names that this container has been given"
type: "array"
items:
type: "string"
Image:
description: "The name of the image used when creating this container"
type: "string"
ImageID:
description: "The ID of the image that this container was created from"
type: "string"
Command:
description: "Command to run when starting the container"
type: "string"
Created:
description: "When the container was created"
type: "integer"
format: "int64"
Ports:
description: "The ports exposed by this container"
type: "array"
items:
$ref: "#/definitions/Port"
SizeRw:
description: "The size of files that have been created or changed by this container"
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container"
type: "integer"
format: "int64"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
State:
description: "The state of this container (e.g. `Exited`)"
type: "string"
Status:
description: "Additional human-readable status of this container (e.g. `Exit 0`)"
type: "string"
HostConfig:
type: "object"
properties:
NetworkMode:
type: "string"
NetworkSettings:
description: "A summary of the container's network settings"
type: "object"
properties:
Networks:
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Driver:
description: "Driver represents a driver (network, logging, secrets)."
type: "object"
required: [Name]
properties:
Name:
description: "Name of the driver."
type: "string"
x-nullable: false
example: "some-driver"
Options:
description: "Key/value map of driver-specific options."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
OptionA: "value for driver-specific option A"
OptionB: "value for driver-specific option B"
SecretSpec:
type: "object"
properties:
Name:
description: "User-defined name of the secret."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
data to store as secret.
This field is only used to _create_ a secret, and is not returned by
other endpoints.
type: "string"
example: ""
Driver:
description: |
Name of the secrets driver used to fetch the secret's value from an
external secret store.
$ref: "#/definitions/Driver"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Secret:
type: "object"
properties:
ID:
type: "string"
example: "blt1owaxmitz71s9v5zh81zun"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
UpdatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
Spec:
$ref: "#/definitions/SecretSpec"
ConfigSpec:
type: "object"
properties:
Name:
description: "User-defined name of the config."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
config data.
type: "string"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Config:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ConfigSpec"
ContainerState:
description: |
ContainerState stores container's running state. It's part of ContainerJSONBase
and will be returned by the "inspect" command.
type: "object"
x-nullable: true
properties:
Status:
description: |
String representation of the container state. Can be one of "created",
"running", "paused", "restarting", "removing", "exited", or "dead".
type: "string"
enum: ["created", "running", "paused", "restarting", "removing", "exited", "dead"]
example: "running"
Running:
description: |
Whether this container is running.
Note that a running container can be _paused_. The `Running` and `Paused`
booleans are not mutually exclusive:
When pausing a container (on Linux), the freezer cgroup is used to suspend
all processes in the container. Freezing the process requires the process to
be running. As a result, paused containers are both `Running` _and_ `Paused`.
Use the `Status` field instead to determine if a container's state is "running".
type: "boolean"
example: true
Paused:
description: "Whether this container is paused."
type: "boolean"
example: false
Restarting:
description: "Whether this container is restarting."
type: "boolean"
example: false
OOMKilled:
description: |
Whether this container has been killed because it ran out of memory.
type: "boolean"
example: false
Dead:
type: "boolean"
example: false
Pid:
description: "The process ID of this container"
type: "integer"
example: 1234
ExitCode:
description: "The last exit code of this container"
type: "integer"
example: 0
Error:
type: "string"
StartedAt:
description: "The time when this container was last started."
type: "string"
example: "2020-01-06T09:06:59.461876391Z"
FinishedAt:
description: "The time when this container last exited."
type: "string"
example: "2020-01-06T09:07:59.461876391Z"
Health:
$ref: "#/definitions/Health"
ContainerCreateResponse:
description: "OK response to ContainerCreate operation"
type: "object"
title: "ContainerCreateResponse"
x-go-name: "CreateResponse"
required: [Id, Warnings]
properties:
Id:
description: "The ID of the created container"
type: "string"
x-nullable: false
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Warnings:
description: "Warnings encountered when creating the container"
type: "array"
x-nullable: false
items:
type: "string"
example: []
ContainerWaitResponse:
description: "OK response to ContainerWait operation"
type: "object"
x-go-name: "WaitResponse"
title: "ContainerWaitResponse"
required: [StatusCode, Error]
properties:
StatusCode:
description: "Exit code of the container"
type: "integer"
x-nullable: false
Error:
$ref: "#/definitions/ContainerWaitExitError"
ContainerWaitExitError:
description: "container waiting error, if any"
type: "object"
x-go-name: "WaitExitError"
properties:
Message:
description: "Details of an error"
type: "string"
SystemVersion:
type: "object"
description: |
Response of Engine API: GET "/version"
properties:
Platform:
type: "object"
required: [Name]
properties:
Name:
type: "string"
Components:
type: "array"
description: |
Information about system components
items:
type: "object"
x-go-name: ComponentVersion
required: [Name, Version]
properties:
Name:
description: |
Name of the component
type: "string"
example: "Engine"
Version:
description: |
Version of the component
type: "string"
x-nullable: false
example: "19.03.12"
Details:
description: |
Key/value pairs of strings with additional information about the
component. These values are intended for informational purposes
only, and their content is not defined, and not part of the API
specification.
These messages can be printed by the client as information to the user.
type: "object"
x-nullable: true
Version:
description: "The version of the daemon"
type: "string"
example: "19.03.12"
ApiVersion:
description: |
The default (and highest) API version that is supported by the daemon
type: "string"
example: "1.40"
MinAPIVersion:
description: |
The minimum API version that is supported by the daemon
type: "string"
example: "1.12"
GitCommit:
description: |
The Git commit of the source code that was used to build the daemon
type: "string"
example: "48a66213fe"
GoVersion:
description: |
The version Go used to compile the daemon, and the version of the Go
runtime in use.
type: "string"
example: "go1.13.14"
Os:
description: |
The operating system that the daemon is running on ("linux" or "windows")
type: "string"
example: "linux"
Arch:
description: |
The architecture that the daemon is running on
type: "string"
example: "amd64"
KernelVersion:
description: |
The kernel version (`uname -r`) that the daemon is running on.
This field is omitted when empty.
type: "string"
example: "4.19.76-linuxkit"
Experimental:
description: |
Indicates if the daemon is started with experimental features enabled.
This field is omitted when empty / false.
type: "boolean"
example: true
BuildTime:
description: |
The date and time that the daemon was compiled.
type: "string"
example: "2020-06-22T15:49:27.000000000+00:00"
SystemInfo:
type: "object"
properties:
ID:
description: |
Unique identifier of the daemon.
<p><br /></p>
> **Note**: The format of the ID itself is not part of the API, and
> should not be considered stable.
type: "string"
example: "7TRN:IPZB:QYBB:VPBQ:UMPP:KARE:6ZNR:XE6T:7EWV:PKF4:ZOJD:TPYS"
Containers:
description: "Total number of containers on the host."
type: "integer"
example: 14
ContainersRunning:
description: |
Number of containers with status `"running"`.
type: "integer"
example: 3
ContainersPaused:
description: |
Number of containers with status `"paused"`.
type: "integer"
example: 1
ContainersStopped:
description: |
Number of containers with status `"stopped"`.
type: "integer"
example: 10
Images:
description: |
Total number of images on the host.
Both _tagged_ and _untagged_ (dangling) images are counted.
type: "integer"
example: 508
Driver:
description: "Name of the storage driver in use."
type: "string"
example: "overlay2"
DriverStatus:
description: |
Information specific to the storage driver, provided as
"label" / "value" pairs.
This information is provided by the storage driver, and formatted
in a way consistent with the output of `docker info` on the command
line.
<p><br /></p>
> **Note**: The information returned in this field, including the
> formatting of values and labels, should not be considered stable,
> and may change without notice.
type: "array"
items:
type: "array"
items:
type: "string"
example:
- ["Backing Filesystem", "extfs"]
- ["Supports d_type", "true"]
- ["Native Overlay Diff", "true"]
DockerRootDir:
description: |
Root directory of persistent Docker state.
Defaults to `/var/lib/docker` on Linux, and `C:\ProgramData\docker`
on Windows.
type: "string"
example: "/var/lib/docker"
Plugins:
$ref: "#/definitions/PluginsInfo"
MemoryLimit:
description: "Indicates if the host has memory limit support enabled."
type: "boolean"
example: true
SwapLimit:
description: "Indicates if the host has memory swap limit support enabled."
type: "boolean"
example: true
KernelMemoryTCP:
description: |
Indicates if the host has kernel memory TCP limit support enabled. This
field is omitted if not supported.
Kernel memory TCP limits are not supported when using cgroups v2, which
does not support the corresponding `memory.kmem.tcp.limit_in_bytes` cgroup.
type: "boolean"
example: true
CpuCfsPeriod:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) period is supported by
the host.
type: "boolean"
example: true
CpuCfsQuota:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) quota is supported by
the host.
type: "boolean"
example: true
CPUShares:
description: |
Indicates if CPU Shares limiting is supported by the host.
type: "boolean"
example: true
CPUSet:
description: |
Indicates if CPUsets (cpuset.cpus, cpuset.mems) are supported by the host.
See [cpuset(7)](https://www.kernel.org/doc/Documentation/cgroup-v1/cpusets.txt)
type: "boolean"
example: true
PidsLimit:
description: "Indicates if the host kernel has PID limit support enabled."
type: "boolean"
example: true
OomKillDisable:
description: "Indicates if OOM killer disable is supported on the host."
type: "boolean"
IPv4Forwarding:
description: "Indicates IPv4 forwarding is enabled."
type: "boolean"
example: true
BridgeNfIptables:
description: "Indicates if `bridge-nf-call-iptables` is available on the host."
type: "boolean"
example: true
BridgeNfIp6tables:
description: "Indicates if `bridge-nf-call-ip6tables` is available on the host."
type: "boolean"
example: true
Debug:
description: |
Indicates if the daemon is running in debug-mode / with debug-level
logging enabled.
type: "boolean"
example: true
NFd:
description: |
The total number of file Descriptors in use by the daemon process.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 64
NGoroutines:
description: |
The number of goroutines that currently exist.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 174
SystemTime:
description: |
Current system-time in [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt)
format with nano-seconds.
type: "string"
example: "2017-08-08T20:28:29.06202363Z"
LoggingDriver:
description: |
The logging driver to use as a default for new containers.
type: "string"
CgroupDriver:
description: |
The driver to use for managing cgroups.
type: "string"
enum: ["cgroupfs", "systemd", "none"]
default: "cgroupfs"
example: "cgroupfs"
CgroupVersion:
description: |
The version of the cgroup.
type: "string"
enum: ["1", "2"]
default: "1"
example: "1"
NEventsListener:
description: "Number of event listeners subscribed."
type: "integer"
example: 30
KernelVersion:
description: |
Kernel version of the host.
On Linux, this information obtained from `uname`. On Windows this
information is queried from the <kbd>HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\</kbd>
registry value, for example _"10.0 14393 (14393.1198.amd64fre.rs1_release_sec.170427-1353)"_.
type: "string"
example: "4.9.38-moby"
OperatingSystem:
description: |
Name of the host's operating system, for example: "Ubuntu 16.04.2 LTS"
or "Windows Server 2016 Datacenter"
type: "string"
example: "Alpine Linux v3.5"
OSVersion:
description: |
Version of the host's operating system
<p><br /></p>
> **Note**: The information returned in this field, including its
> very existence, and the formatting of values, should not be considered
> stable, and may change without notice.
type: "string"
example: "16.04"
OSType:
description: |
Generic type of the operating system of the host, as returned by the
Go runtime (`GOOS`).
Currently returned values are "linux" and "windows". A full list of
possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "linux"
Architecture:
description: |
Hardware architecture of the host, as returned by the Go runtime
(`GOARCH`).
A full list of possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "x86_64"
NCPU:
description: |
The number of logical CPUs usable by the daemon.
The number of available CPUs is checked by querying the operating
system when the daemon starts. Changes to operating system CPU
allocation after the daemon is started are not reflected.
type: "integer"
example: 4
MemTotal:
description: |
Total amount of physical memory available on the host, in bytes.
type: "integer"
format: "int64"
example: 2095882240
IndexServerAddress:
description: |
Address / URL of the index server that is used for image search,
and as a default for user authentication for Docker Hub and Docker Cloud.
default: "https://index.docker.io/v1/"
type: "string"
example: "https://index.docker.io/v1/"
RegistryConfig:
$ref: "#/definitions/RegistryServiceConfig"
GenericResources:
$ref: "#/definitions/GenericResources"
HttpProxy:
description: |
HTTP-proxy configured for the daemon. This value is obtained from the
[`HTTP_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "http://xxxxx:[email protected]:8080"
HttpsProxy:
description: |
HTTPS-proxy configured for the daemon. This value is obtained from the
[`HTTPS_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "https://xxxxx:[email protected]:4443"
NoProxy:
description: |
Comma-separated list of domain extensions for which no proxy should be
used. This value is obtained from the [`NO_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html)
environment variable.
Containers do not automatically inherit this configuration.
type: "string"
example: "*.local, 169.254/16"
Name:
description: "Hostname of the host."
type: "string"
example: "node5.corp.example.com"
Labels:
description: |
User-defined labels (key/value metadata) as set on the daemon.
<p><br /></p>
> **Note**: When part of a Swarm, nodes can both have _daemon_ labels,
> set through the daemon configuration, and _node_ labels, set from a
> manager node in the Swarm. Node labels are not included in this
> field. Node labels can be retrieved using the `/nodes/(id)` endpoint
> on a manager node in the Swarm.
type: "array"
items:
type: "string"
example: ["storage=ssd", "production"]
ExperimentalBuild:
description: |
Indicates if experimental features are enabled on the daemon.
type: "boolean"
example: true
ServerVersion:
description: |
Version string of the daemon.
> **Note**: the [standalone Swarm API](https://docs.docker.com/swarm/swarm-api/)
> returns the Swarm version instead of the daemon version, for example
> `swarm/1.2.8`.
type: "string"
example: "17.06.0-ce"
ClusterStore:
description: |
URL of the distributed storage backend.
The storage backend is used for multihost networking (to store
network and endpoint information) and by the node discovery mechanism.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "consul://consul.corp.example.com:8600/some/path"
ClusterAdvertise:
description: |
The network endpoint that the Engine advertises for the purpose of
node discovery. ClusterAdvertise is a `host:port` combination on which
the daemon is reachable by other hosts.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "node5.corp.example.com:8000"
Runtimes:
description: |
List of [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtimes configured on the daemon. Keys hold the "name" used to
reference the runtime.
The Docker daemon relies on an OCI compliant runtime (invoked via the
`containerd` daemon) as its interface to the Linux kernel namespaces,
cgroups, and SELinux.
The default runtime is `runc`, and automatically configured. Additional
runtimes can be configured by the user and will be listed here.
type: "object"
additionalProperties:
$ref: "#/definitions/Runtime"
default:
runc:
path: "runc"
example:
runc:
path: "runc"
runc-master:
path: "/go/bin/runc"
custom:
path: "/usr/local/bin/my-oci-runtime"
runtimeArgs: ["--debug", "--systemd-cgroup=false"]
DefaultRuntime:
description: |
Name of the default OCI runtime that is used when starting containers.
The default can be overridden per-container at create time.
type: "string"
default: "runc"
example: "runc"
Swarm:
$ref: "#/definitions/SwarmInfo"
LiveRestoreEnabled:
description: |
Indicates if live restore is enabled.
If enabled, containers are kept running when the daemon is shutdown
or upon daemon start if running containers are detected.
type: "boolean"
default: false
example: false
Isolation:
description: |
Represents the isolation technology to use as a default for containers.
The supported values are platform-specific.
If no isolation value is specified on daemon start, on Windows client,
the default is `hyperv`, and on Windows server, the default is `process`.
This option is currently not used on other platforms.
default: "default"
type: "string"
enum:
- "default"
- "hyperv"
- "process"
InitBinary:
description: |
Name and, optional, path of the `docker-init` binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "docker-init"
ContainerdCommit:
$ref: "#/definitions/Commit"
RuncCommit:
$ref: "#/definitions/Commit"
InitCommit:
$ref: "#/definitions/Commit"
SecurityOptions:
description: |
List of security features that are enabled on the daemon, such as
apparmor, seccomp, SELinux, user-namespaces (userns), and rootless.
Additional configuration options for each security feature may
be present, and are included as a comma-separated list of key/value
pairs.
type: "array"
items:
type: "string"
example:
- "name=apparmor"
- "name=seccomp,profile=default"
- "name=selinux"
- "name=userns"
- "name=rootless"
ProductLicense:
description: |
Reports a summary of the product license on the daemon.
If a commercial license has been applied to the daemon, information
such as number of nodes, and expiration are included.
type: "string"
example: "Community Engine"
DefaultAddressPools:
description: |
List of custom default address pools for local networks, which can be
specified in the daemon.json file or dockerd option.
Example: a Base "10.10.0.0/16" with Size 24 will define the set of 256
10.10.[0-255].0/24 address pools.
type: "array"
items:
type: "object"
properties:
Base:
description: "The network address in CIDR format"
type: "string"
example: "10.10.0.0/16"
Size:
description: "The network pool size"
type: "integer"
example: "24"
Warnings:
description: |
List of warnings / informational messages about missing features, or
issues related to the daemon configuration.
These messages can be printed by the client as information to the user.
type: "array"
items:
type: "string"
example:
- "WARNING: No memory limit support"
- "WARNING: bridge-nf-call-iptables is disabled"
- "WARNING: bridge-nf-call-ip6tables is disabled"
# PluginsInfo is a temp struct holding Plugins name
# registered with docker daemon. It is used by Info struct
PluginsInfo:
description: |
Available plugins per type.
<p><br /></p>
> **Note**: Only unmanaged (V1) plugins are included in this list.
> V1 plugins are "lazily" loaded, and are not returned in this list
> if there is no resource using the plugin.
type: "object"
properties:
Volume:
description: "Names of available volume-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["local"]
Network:
description: "Names of available network-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["bridge", "host", "ipvlan", "macvlan", "null", "overlay"]
Authorization:
description: "Names of available authorization plugins."
type: "array"
items:
type: "string"
example: ["img-authz-plugin", "hbm"]
Log:
description: "Names of available logging-drivers, and logging-driver plugins."
type: "array"
items:
type: "string"
example: ["awslogs", "fluentd", "gcplogs", "gelf", "journald", "json-file", "logentries", "splunk", "syslog"]
RegistryServiceConfig:
description: |
RegistryServiceConfig stores daemon registry services configuration.
type: "object"
x-nullable: true
properties:
AllowNondistributableArtifactsCIDRs:
description: |
List of IP ranges to which nondistributable artifacts can be pushed,
using the CIDR syntax [RFC 4632](https://tools.ietf.org/html/4632).
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior, and enables the daemon to
push nondistributable artifacts to all registries whose resolved IP
address is within the subnet described by the CIDR syntax.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
AllowNondistributableArtifactsHostnames:
description: |
List of registry hostnames to which nondistributable artifacts can be
pushed, using the format `<hostname>[:<port>]` or `<IP address>[:<port>]`.
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior for the specified
registries.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["registry.internal.corp.example.com:3000", "[2001:db8:a0b:12f0::1]:443"]
InsecureRegistryCIDRs:
description: |
List of IP ranges of insecure registries, using the CIDR syntax
([RFC 4632](https://tools.ietf.org/html/4632)). Insecure registries
accept un-encrypted (HTTP) and/or untrusted (HTTPS with certificates
from unknown CAs) communication.
By default, local registries (`127.0.0.0/8`) are configured as
insecure. All other registries are secure. Communicating with an
insecure registry is not possible if the daemon assumes that registry
is secure.
This configuration override this behavior, insecure communication with
registries whose resolved IP address is within the subnet described by
the CIDR syntax.
Registries can also be marked insecure by hostname. Those registries
are listed under `IndexConfigs` and have their `Secure` field set to
`false`.
> **Warning**: Using this option can be useful when running a local
> registry, but introduces security vulnerabilities. This option
> should therefore ONLY be used for testing purposes. For increased
> security, users should add their CA to their system's list of trusted
> CAs instead of enabling this option.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
IndexConfigs:
type: "object"
additionalProperties:
$ref: "#/definitions/IndexInfo"
example:
"127.0.0.1:5000":
"Name": "127.0.0.1:5000"
"Mirrors": []
"Secure": false
"Official": false
"[2001:db8:a0b:12f0::1]:80":
"Name": "[2001:db8:a0b:12f0::1]:80"
"Mirrors": []
"Secure": false
"Official": false
"docker.io":
Name: "docker.io"
Mirrors: ["https://hub-mirror.corp.example.com:5000/"]
Secure: true
Official: true
"registry.internal.corp.example.com:3000":
Name: "registry.internal.corp.example.com:3000"
Mirrors: []
Secure: false
Official: false
Mirrors:
description: |
List of registry URLs that act as a mirror for the official
(`docker.io`) registry.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://[2001:db8:a0b:12f0::1]/"
IndexInfo:
description:
IndexInfo contains information about a registry.
type: "object"
x-nullable: true
properties:
Name:
description: |
Name of the registry, such as "docker.io".
type: "string"
example: "docker.io"
Mirrors:
description: |
List of mirrors, expressed as URIs.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://registry-2.docker.io/"
- "https://registry-3.docker.io/"
Secure:
description: |
Indicates if the registry is part of the list of insecure
registries.
If `false`, the registry is insecure. Insecure registries accept
un-encrypted (HTTP) and/or untrusted (HTTPS with certificates from
unknown CAs) communication.
> **Warning**: Insecure registries can be useful when running a local
> registry. However, because its use creates security vulnerabilities
> it should ONLY be enabled for testing purposes. For increased
> security, users should add their CA to their system's list of
> trusted CAs instead of enabling this option.
type: "boolean"
example: true
Official:
description: |
Indicates whether this is an official registry (i.e., Docker Hub / docker.io)
type: "boolean"
example: true
Runtime:
description: |
Runtime describes an [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtime.
The runtime is invoked by the daemon via the `containerd` daemon. OCI
runtimes act as an interface to the Linux kernel namespaces, cgroups,
and SELinux.
type: "object"
properties:
path:
description: |
Name and, optional, path, of the OCI executable binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "/usr/local/bin/my-oci-runtime"
runtimeArgs:
description: |
List of command-line arguments to pass to the runtime when invoked.
type: "array"
x-nullable: true
items:
type: "string"
example: ["--debug", "--systemd-cgroup=false"]
Commit:
description: |
Commit holds the Git-commit (SHA1) that a binary was built from, as
reported in the version-string of external tools, such as `containerd`,
or `runC`.
type: "object"
properties:
ID:
description: "Actual commit ID of external tool."
type: "string"
example: "cfb82a876ecc11b5ca0977d1733adbe58599088a"
Expected:
description: |
Commit ID of external tool expected by dockerd as set at build time.
type: "string"
example: "2d41c047c83e09a6d61d464906feb2a2f3c52aa4"
SwarmInfo:
description: |
Represents generic information about swarm.
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
default: ""
example: "k67qz4598weg5unwwffg6z1m1"
NodeAddr:
description: |
IP address at which this node can be reached by other nodes in the
swarm.
type: "string"
default: ""
example: "10.0.0.46"
LocalNodeState:
$ref: "#/definitions/LocalNodeState"
ControlAvailable:
type: "boolean"
default: false
example: true
Error:
type: "string"
default: ""
RemoteManagers:
description: |
List of ID's and addresses of other managers in the swarm.
type: "array"
default: null
x-nullable: true
items:
$ref: "#/definitions/PeerNode"
example:
- NodeID: "71izy0goik036k48jg985xnds"
Addr: "10.0.0.158:2377"
- NodeID: "79y6h1o4gv8n120drcprv5nmc"
Addr: "10.0.0.159:2377"
- NodeID: "k67qz4598weg5unwwffg6z1m1"
Addr: "10.0.0.46:2377"
Nodes:
description: "Total number of nodes in the swarm."
type: "integer"
x-nullable: true
example: 4
Managers:
description: "Total number of managers in the swarm."
type: "integer"
x-nullable: true
example: 3
Cluster:
$ref: "#/definitions/ClusterInfo"
LocalNodeState:
description: "Current local status of this node."
type: "string"
default: ""
enum:
- ""
- "inactive"
- "pending"
- "active"
- "error"
- "locked"
example: "active"
PeerNode:
description: "Represents a peer-node in the swarm"
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
Addr:
description: |
IP address and ports at which this node can be reached.
type: "string"
NetworkAttachmentConfig:
description: |
Specifies how a service should be attached to a particular network.
type: "object"
properties:
Target:
description: |
The target network for attachment. Must be a network name or ID.
type: "string"
Aliases:
description: |
Discoverable alternate names for the service on this network.
type: "array"
items:
type: "string"
DriverOpts:
description: |
Driver attachment options for the network target.
type: "object"
additionalProperties:
type: "string"
EventActor:
description: |
Actor describes something that generates events, like a container, network,
or a volume.
type: "object"
properties:
ID:
description: "The ID of the object emitting the event"
type: "string"
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Attributes:
description: |
Various key/value attributes of the object, depending on its type.
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-label-value"
image: "alpine:latest"
name: "my-container"
EventMessage:
description: |
EventMessage represents the information an event contains.
type: "object"
title: "SystemEventsResponse"
properties:
Type:
description: "The type of object emitting the event"
type: "string"
enum: ["builder", "config", "container", "daemon", "image", "network", "node", "plugin", "secret", "service", "volume"]
example: "container"
Action:
description: "The type of event"
type: "string"
example: "create"
Actor:
$ref: "#/definitions/EventActor"
scope:
description: |
Scope of the event. Engine events are `local` scope. Cluster (Swarm)
events are `swarm` scope.
type: "string"
enum: ["local", "swarm"]
time:
description: "Timestamp of event"
type: "integer"
format: "int64"
example: 1629574695
timeNano:
description: "Timestamp of event, with nanosecond accuracy"
type: "integer"
format: "int64"
example: 1629574695515050031
OCIDescriptor:
type: "object"
x-go-name: Descriptor
description: |
A descriptor struct containing digest, media type, and size, as defined in
the [OCI Content Descriptors Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/descriptor.md).
properties:
mediaType:
description: |
The media type of the object this schema refers to.
type: "string"
example: "application/vnd.docker.distribution.manifest.v2+json"
digest:
description: |
The digest of the targeted content.
type: "string"
example: "sha256:c0537ff6a5218ef531ece93d4984efc99bbf3f7497c0a7726c88e2bb7584dc96"
size:
description: |
The size in bytes of the blob.
type: "integer"
format: "int64"
example: 3987495
# TODO Not yet including these fields for now, as they are nil / omitted in our response.
# urls:
# description: |
# List of URLs from which this object MAY be downloaded.
# type: "array"
# items:
# type: "string"
# format: "uri"
# annotations:
# description: |
# Arbitrary metadata relating to the targeted content.
# type: "object"
# additionalProperties:
# type: "string"
# platform:
# $ref: "#/definitions/OCIPlatform"
OCIPlatform:
type: "object"
x-go-name: Platform
description: |
Describes the platform which the image in the manifest runs on, as defined
in the [OCI Image Index Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/image-index.md).
properties:
architecture:
description: |
The CPU architecture, for example `amd64` or `ppc64`.
type: "string"
example: "arm"
os:
description: |
The operating system, for example `linux` or `windows`.
type: "string"
example: "windows"
os.version:
description: |
Optional field specifying the operating system version, for example on
Windows `10.0.19041.1165`.
type: "string"
example: "10.0.19041.1165"
os.features:
description: |
Optional field specifying an array of strings, each listing a required
OS feature (for example on Windows `win32k`).
type: "array"
items:
type: "string"
example:
- "win32k"
variant:
description: |
Optional field specifying a variant of the CPU, for example `v7` to
specify ARMv7 when architecture is `arm`.
type: "string"
example: "v7"
DistributionInspect:
type: "object"
x-go-name: DistributionInspect
title: "DistributionInspectResponse"
required: [Descriptor, Platforms]
description: |
Describes the result obtained from contacting the registry to retrieve
image metadata.
properties:
Descriptor:
$ref: "#/definitions/OCIDescriptor"
Platforms:
type: "array"
description: |
An array containing all platforms supported by the image.
items:
$ref: "#/definitions/OCIPlatform"
ClusterVolume:
type: "object"
description: |
Options and information specific to, and only present on, Swarm CSI
cluster volumes.
properties:
ID:
type: "string"
description: |
The Swarm ID of this volume. Because cluster volumes are Swarm
objects, they have an ID, unlike non-cluster volumes. This ID can
be used to refer to the Volume instead of the name.
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ClusterVolumeSpec"
Info:
type: "object"
description: |
Information about the global status of the volume.
properties:
CapacityBytes:
type: "integer"
format: "int64"
description: |
The capacity of the volume in bytes. A value of 0 indicates that
the capacity is unknown.
VolumeContext:
type: "object"
description: |
A map of strings to strings returned from the storage plugin when
the volume is created.
additionalProperties:
type: "string"
VolumeID:
type: "string"
description: |
The ID of the volume as returned by the CSI storage plugin. This
is distinct from the volume's ID as provided by Docker. This ID
is never used by the user when communicating with Docker to refer
to this volume. If the ID is blank, then the Volume has not been
successfully created in the plugin yet.
AccessibleTopology:
type: "array"
description: |
The topology this volume is actually accessible from.
items:
$ref: "#/definitions/Topology"
PublishStatus:
type: "array"
description: |
The status of the volume as it pertains to its publishing and use on
specific nodes
items:
type: "object"
properties:
NodeID:
type: "string"
description: |
The ID of the Swarm node the volume is published on.
State:
type: "string"
description: |
The published state of the volume.
* `pending-publish` The volume should be published to this node, but the call to the controller plugin to do so has not yet been successfully completed.
* `published` The volume is published successfully to the node.
* `pending-node-unpublish` The volume should be unpublished from the node, and the manager is awaiting confirmation from the worker that it has done so.
* `pending-controller-unpublish` The volume is successfully unpublished from the node, but has not yet been successfully unpublished on the controller.
enum:
- "pending-publish"
- "published"
- "pending-node-unpublish"
- "pending-controller-unpublish"
PublishContext:
type: "object"
description: |
A map of strings to strings returned by the CSI controller
plugin when a volume is published.
additionalProperties:
type: "string"
ClusterVolumeSpec:
type: "object"
description: |
Cluster-specific options used to create the volume.
properties:
Group:
type: "string"
description: |
Group defines the volume group of this volume. Volumes belonging to
the same group can be referred to by group name when creating
Services. Referring to a volume by group instructs Swarm to treat
volumes in that group interchangeably for the purpose of scheduling.
Volumes with an empty string for a group technically all belong to
the same, emptystring group.
AccessMode:
type: "object"
description: |
Defines how the volume is used by tasks.
properties:
Scope:
type: "string"
description: |
The set of nodes this volume can be used on at one time.
- `single` The volume may only be scheduled to one node at a time.
- `multi` the volume may be scheduled to any supported number of nodes at a time.
default: "single"
enum: ["single", "multi"]
x-nullable: false
Sharing:
type: "string"
description: |
The number and way that different tasks can use this volume
at one time.
- `none` The volume may only be used by one task at a time.
- `readonly` The volume may be used by any number of tasks, but they all must mount the volume as readonly
- `onewriter` The volume may be used by any number of tasks, but only one may mount it as read/write.
- `all` The volume may have any number of readers and writers.
default: "none"
enum: ["none", "readonly", "onewriter", "all"]
x-nullable: false
MountVolume:
type: "object"
description: |
Options for using this volume as a Mount-type volume.
Either MountVolume or BlockVolume, but not both, must be
present.
properties:
FsType:
type: "string"
description: |
Specifies the filesystem type for the mount volume.
Optional.
MountFlags:
type: "array"
description: |
Flags to pass when mounting the volume. Optional.
items:
type: "string"
BlockVolume:
type: "object"
description: |
Options for using this volume as a Block-type volume.
Intentionally empty.
Secrets:
type: "array"
description: |
Swarm Secrets that are passed to the CSI storage plugin when
operating on this volume.
items:
type: "object"
description: |
One cluster volume secret entry. Defines a key-value pair that
is passed to the plugin.
properties:
Key:
type: "string"
description: |
Key is the name of the key of the key-value pair passed to
the plugin.
Secret:
type: "string"
description: |
Secret is the swarm Secret object from which to read data.
This can be a Secret name or ID. The Secret data is
retrieved by swarm and used as the value of the key-value
pair passed to the plugin.
AccessibilityRequirements:
type: "object"
description: |
Requirements for the accessible topology of the volume. These
fields are optional. For an in-depth description of what these
fields mean, see the CSI specification.
properties:
Requisite:
type: "array"
description: |
A list of required topologies, at least one of which the
volume must be accessible from.
items:
$ref: "#/definitions/Topology"
Preferred:
type: "array"
description: |
A list of topologies that the volume should attempt to be
provisioned in.
items:
$ref: "#/definitions/Topology"
CapacityRange:
type: "object"
description: |
The desired capacity that the volume should be created with. If
empty, the plugin will decide the capacity.
properties:
RequiredBytes:
type: "integer"
format: "int64"
description: |
The volume must be at least this big. The value of 0
indicates an unspecified minimum
LimitBytes:
type: "integer"
format: "int64"
description: |
The volume must not be bigger than this. The value of 0
indicates an unspecified maximum.
Availability:
type: "string"
description: |
The availability of the volume for use in tasks.
- `active` The volume is fully available for scheduling on the cluster
- `pause` No new workloads should use the volume, but existing workloads are not stopped.
- `drain` All workloads using this volume should be stopped and rescheduled, and no new ones should be started.
default: "active"
x-nullable: false
enum:
- "active"
- "pause"
- "drain"
Topology:
description: |
A map of topological domains to topological segments. For in depth
details, see documentation for the Topology object in the CSI
specification.
type: "object"
additionalProperties:
type: "string"
paths:
/containers/json:
get:
summary: "List containers"
description: |
Returns a list of containers. For details on the format, see the
[inspect endpoint](#operation/ContainerInspect).
Note that it uses a different, smaller representation of a container
than inspecting a single container. For example, the list of linked
containers is not propagated .
operationId: "ContainerList"
produces:
- "application/json"
parameters:
- name: "all"
in: "query"
description: |
Return all containers. By default, only running containers are shown.
type: "boolean"
default: false
- name: "limit"
in: "query"
description: |
Return this number of most recently created containers, including
non-running ones.
type: "integer"
- name: "size"
in: "query"
description: |
Return the size of container as fields `SizeRw` and `SizeRootFs`.
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
Filters to process on the container list, encoded as JSON (a
`map[string][]string`). For example, `{"status": ["paused"]}` will
only return paused containers.
Available filters:
- `ancestor`=(`<image-name>[:<tag>]`, `<image id>`, or `<image@digest>`)
- `before`=(`<container id>` or `<container name>`)
- `expose`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `exited=<int>` containers with exit code of `<int>`
- `health`=(`starting`|`healthy`|`unhealthy`|`none`)
- `id=<ID>` a container's ID
- `isolation=`(`default`|`process`|`hyperv`) (Windows daemon only)
- `is-task=`(`true`|`false`)
- `label=key` or `label="key=value"` of a container label
- `name=<name>` a container's name
- `network`=(`<network id>` or `<network name>`)
- `publish`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `since`=(`<container id>` or `<container name>`)
- `status=`(`created`|`restarting`|`running`|`removing`|`paused`|`exited`|`dead`)
- `volume`=(`<volume name>` or `<mount point destination>`)
type: "string"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
examples:
application/json:
- Id: "8dfafdbc3a40"
Names:
- "/boring_feynman"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 1"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports:
- PrivatePort: 2222
PublicPort: 3333
Type: "tcp"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "2cdc4edb1ded3631c81f57966563e5c8525b81121bb3706a9a9a3ae102711f3f"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:02"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
- Id: "9cd87474be90"
Names:
- "/coolName"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 222222"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "88eaed7b37b38c2a3f0c4bc796494fdf51b270c2d22656412a2ca5d559a64d7a"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.8"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:08"
Mounts: []
- Id: "3176a2479c92"
Names:
- "/sleepy_dog"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 3333333333333333"
Created: 1367854154
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "8b27c041c30326d59cd6e6f510d4f8d1d570a228466f956edf7815508f78e30d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.6"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:06"
Mounts: []
- Id: "4cb07b47f9fb"
Names:
- "/running_cat"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 444444444444444444444444444444444"
Created: 1367854152
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "d91c7b2f0644403d7ef3095985ea0e2370325cd2332ff3a3225c4247328e66e9"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.5"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:05"
Mounts: []
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/create:
post:
summary: "Create a container"
operationId: "ContainerCreate"
consumes:
- "application/json"
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "name"
in: "query"
description: |
Assign the specified name to the container. Must match
`/?[a-zA-Z0-9][a-zA-Z0-9_.-]+`.
type: "string"
pattern: "^/?[a-zA-Z0-9][a-zA-Z0-9_.-]+$"
- name: "body"
in: "body"
description: "Container to create"
schema:
allOf:
- $ref: "#/definitions/ContainerConfig"
- type: "object"
properties:
HostConfig:
$ref: "#/definitions/HostConfig"
NetworkingConfig:
$ref: "#/definitions/NetworkingConfig"
example:
Hostname: ""
Domainname: ""
User: ""
AttachStdin: false
AttachStdout: true
AttachStderr: true
Tty: false
OpenStdin: false
StdinOnce: false
Env:
- "FOO=bar"
- "BAZ=quux"
Cmd:
- "date"
Entrypoint: ""
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
Volumes:
/volumes/data: {}
WorkingDir: ""
NetworkDisabled: false
MacAddress: "12:34:56:78:9a:bc"
ExposedPorts:
22/tcp: {}
StopSignal: "SIGTERM"
StopTimeout: 10
HostConfig:
Binds:
- "/tmp:/tmp"
Links:
- "redis3:redis"
Memory: 0
MemorySwap: 0
MemoryReservation: 0
NanoCpus: 500000
CpuPercent: 80
CpuShares: 512
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpuQuota: 50000
CpusetCpus: "0,1"
CpusetMems: "0,1"
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 300
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceWriteIOps:
- {}
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
MemorySwappiness: 60
OomKillDisable: false
OomScoreAdj: 500
PidMode: ""
PidsLimit: 0
PortBindings:
22/tcp:
- HostPort: "11022"
PublishAllPorts: false
Privileged: false
ReadonlyRootfs: false
Dns:
- "8.8.8.8"
DnsOptions:
- ""
DnsSearch:
- ""
VolumesFrom:
- "parent"
- "other:ro"
CapAdd:
- "NET_ADMIN"
CapDrop:
- "MKNOD"
GroupAdd:
- "newgroup"
RestartPolicy:
Name: ""
MaximumRetryCount: 0
AutoRemove: true
NetworkMode: "bridge"
Devices: []
Ulimits:
- {}
LogConfig:
Type: "json-file"
Config: {}
SecurityOpt: []
StorageOpt: {}
CgroupParent: ""
VolumeDriver: ""
ShmSize: 67108864
NetworkingConfig:
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
required: true
responses:
201:
description: "Container created successfully"
schema:
$ref: "#/definitions/ContainerCreateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/{id}/json:
get:
summary: "Inspect a container"
description: "Return low-level information about a container."
operationId: "ContainerInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerInspectResponse"
properties:
Id:
description: "The ID of the container"
type: "string"
Created:
description: "The time the container was created"
type: "string"
Path:
description: "The path to the command being run"
type: "string"
Args:
description: "The arguments to the command being run"
type: "array"
items:
type: "string"
State:
$ref: "#/definitions/ContainerState"
Image:
description: "The container's image ID"
type: "string"
ResolvConfPath:
type: "string"
HostnamePath:
type: "string"
HostsPath:
type: "string"
LogPath:
type: "string"
Name:
type: "string"
RestartCount:
type: "integer"
Driver:
type: "string"
Platform:
type: "string"
MountLabel:
type: "string"
ProcessLabel:
type: "string"
AppArmorProfile:
type: "string"
ExecIDs:
description: "IDs of exec instances that are running in the container."
type: "array"
items:
type: "string"
x-nullable: true
HostConfig:
$ref: "#/definitions/HostConfig"
GraphDriver:
$ref: "#/definitions/GraphDriverData"
SizeRw:
description: |
The size of files that have been created or changed by this
container.
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container."
type: "integer"
format: "int64"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Config:
$ref: "#/definitions/ContainerConfig"
NetworkSettings:
$ref: "#/definitions/NetworkSettings"
examples:
application/json:
AppArmorProfile: ""
Args:
- "-c"
- "exit 9"
Config:
AttachStderr: true
AttachStdin: false
AttachStdout: true
Cmd:
- "/bin/sh"
- "-c"
- "exit 9"
Domainname: ""
Env:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Healthcheck:
Test: ["CMD-SHELL", "exit 0"]
Hostname: "ba033ac44011"
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
MacAddress: ""
NetworkDisabled: false
OpenStdin: false
StdinOnce: false
Tty: false
User: ""
Volumes:
/volumes/data: {}
WorkingDir: ""
StopSignal: "SIGTERM"
StopTimeout: 10
Created: "2015-01-06T15:47:31.485331387Z"
Driver: "devicemapper"
ExecIDs:
- "b35395de42bc8abd327f9dd65d913b9ba28c74d2f0734eeeae84fa1c616a0fca"
- "3fc1232e5cd20c8de182ed81178503dc6437f4e7ef12b52cc5e8de020652f1c4"
HostConfig:
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 0
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteIOps:
- {}
ContainerIDFile: ""
CpusetCpus: ""
CpusetMems: ""
CpuPercent: 80
CpuShares: 0
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
Devices: []
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
IpcMode: ""
Memory: 0
MemorySwap: 0
MemoryReservation: 0
OomKillDisable: false
OomScoreAdj: 500
NetworkMode: "bridge"
PidMode: ""
PortBindings: {}
Privileged: false
ReadonlyRootfs: false
PublishAllPorts: false
RestartPolicy:
MaximumRetryCount: 2
Name: "on-failure"
LogConfig:
Type: "json-file"
Sysctls:
net.ipv4.ip_forward: "1"
Ulimits:
- {}
VolumeDriver: ""
ShmSize: 67108864
HostnamePath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hostname"
HostsPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hosts"
LogPath: "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b-json.log"
Id: "ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39"
Image: "04c5d3b7b0656168630d3ba35d8889bd0e9caafcaeb3004d2bfbc47e7c5d35d2"
MountLabel: ""
Name: "/boring_euclid"
NetworkSettings:
Bridge: ""
SandboxID: ""
HairpinMode: false
LinkLocalIPv6Address: ""
LinkLocalIPv6PrefixLen: 0
SandboxKey: ""
EndpointID: ""
Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
IPAddress: ""
IPPrefixLen: 0
IPv6Gateway: ""
MacAddress: ""
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "7587b82f0dada3656fda26588aee72630c6fab1536d36e394b2bfbcf898c971d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Path: "/bin/sh"
ProcessLabel: ""
ResolvConfPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/resolv.conf"
RestartCount: 1
State:
Error: ""
ExitCode: 9
FinishedAt: "2015-01-06T15:47:32.080254511Z"
Health:
Status: "healthy"
FailingStreak: 0
Log:
- Start: "2019-12-22T10:59:05.6385933Z"
End: "2019-12-22T10:59:05.8078452Z"
ExitCode: 0
Output: ""
OOMKilled: false
Dead: false
Paused: false
Pid: 0
Restarting: false
Running: true
StartedAt: "2015-01-06T15:47:32.072697474Z"
Status: "running"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "size"
in: "query"
type: "boolean"
default: false
description: "Return the size of container as fields `SizeRw` and `SizeRootFs`"
tags: ["Container"]
/containers/{id}/top:
get:
summary: "List processes running inside a container"
description: |
On Unix systems, this is done by running the `ps` command. This endpoint
is not supported on Windows.
operationId: "ContainerTop"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerTopResponse"
description: "OK response to ContainerTop operation"
properties:
Titles:
description: "The ps column titles"
type: "array"
items:
type: "string"
Processes:
description: |
Each process running in the container, where each is process
is an array of values corresponding to the titles.
type: "array"
items:
type: "array"
items:
type: "string"
examples:
application/json:
Titles:
- "UID"
- "PID"
- "PPID"
- "C"
- "STIME"
- "TTY"
- "TIME"
- "CMD"
Processes:
-
- "root"
- "13642"
- "882"
- "0"
- "17:03"
- "pts/0"
- "00:00:00"
- "/bin/bash"
-
- "root"
- "13735"
- "13642"
- "0"
- "17:06"
- "pts/0"
- "00:00:00"
- "sleep 10"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "ps_args"
in: "query"
description: "The arguments to pass to `ps`. For example, `aux`"
type: "string"
default: "-ef"
tags: ["Container"]
/containers/{id}/logs:
get:
summary: "Get container logs"
description: |
Get `stdout` and `stderr` logs from a container.
Note: This endpoint works only for containers with the `json-file` or
`journald` logging driver.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ContainerLogs"
responses:
200:
description: |
logs returned as a stream in response body.
For the stream format, [see the documentation for the attach endpoint](#operation/ContainerAttach).
Note that unlike the attach endpoint, the logs endpoint does not
upgrade the connection and does not set Content-Type.
schema:
type: "string"
format: "binary"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "until"
in: "query"
description: "Only return logs before this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Container"]
/containers/{id}/changes:
get:
summary: "Get changes on a container’s filesystem"
description: |
Returns which files in a container's filesystem have been added, deleted,
or modified. The `Kind` of modification can be one of:
- `0`: Modified
- `1`: Added
- `2`: Deleted
operationId: "ContainerChanges"
produces: ["application/json"]
responses:
200:
description: "The list of changes"
schema:
type: "array"
items:
type: "object"
x-go-name: "ContainerChangeResponseItem"
title: "ContainerChangeResponseItem"
description: "change item in response to ContainerChanges operation"
required: [Path, Kind]
properties:
Path:
description: "Path to file that has changed"
type: "string"
x-nullable: false
Kind:
description: "Kind of change"
type: "integer"
format: "uint8"
enum: [0, 1, 2]
x-nullable: false
examples:
application/json:
- Path: "/dev"
Kind: 0
- Path: "/dev/kmsg"
Kind: 1
- Path: "/test"
Kind: 1
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/export:
get:
summary: "Export a container"
description: "Export the contents of a container as a tarball."
operationId: "ContainerExport"
produces:
- "application/octet-stream"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/stats:
get:
summary: "Get container stats based on resource usage"
description: |
This endpoint returns a live stream of a container’s resource usage
statistics.
The `precpu_stats` is the CPU statistic of the *previous* read, and is
used to calculate the CPU usage percentage. It is not an exact copy
of the `cpu_stats` field.
If either `precpu_stats.online_cpus` or `cpu_stats.online_cpus` is
nil then for compatibility with older daemons the length of the
corresponding `cpu_usage.percpu_usage` array should be used.
On a cgroup v2 host, the following fields are not set
* `blkio_stats`: all fields other than `io_service_bytes_recursive`
* `cpu_stats`: `cpu_usage.percpu_usage`
* `memory_stats`: `max_usage` and `failcnt`
Also, `memory_stats.stats` fields are incompatible with cgroup v1.
To calculate the values shown by the `stats` command of the docker cli tool
the following formulas can be used:
* used_memory = `memory_stats.usage - memory_stats.stats.cache`
* available_memory = `memory_stats.limit`
* Memory usage % = `(used_memory / available_memory) * 100.0`
* cpu_delta = `cpu_stats.cpu_usage.total_usage - precpu_stats.cpu_usage.total_usage`
* system_cpu_delta = `cpu_stats.system_cpu_usage - precpu_stats.system_cpu_usage`
* number_cpus = `lenght(cpu_stats.cpu_usage.percpu_usage)` or `cpu_stats.online_cpus`
* CPU usage % = `(cpu_delta / system_cpu_delta) * number_cpus * 100.0`
operationId: "ContainerStats"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
type: "object"
examples:
application/json:
read: "2015-01-08T22:57:31.547920715Z"
pids_stats:
current: 3
networks:
eth0:
rx_bytes: 5338
rx_dropped: 0
rx_errors: 0
rx_packets: 36
tx_bytes: 648
tx_dropped: 0
tx_errors: 0
tx_packets: 8
eth5:
rx_bytes: 4641
rx_dropped: 0
rx_errors: 0
rx_packets: 26
tx_bytes: 690
tx_dropped: 0
tx_errors: 0
tx_packets: 9
memory_stats:
stats:
total_pgmajfault: 0
cache: 0
mapped_file: 0
total_inactive_file: 0
pgpgout: 414
rss: 6537216
total_mapped_file: 0
writeback: 0
unevictable: 0
pgpgin: 477
total_unevictable: 0
pgmajfault: 0
total_rss: 6537216
total_rss_huge: 6291456
total_writeback: 0
total_inactive_anon: 0
rss_huge: 6291456
hierarchical_memory_limit: 67108864
total_pgfault: 964
total_active_file: 0
active_anon: 6537216
total_active_anon: 6537216
total_pgpgout: 414
total_cache: 0
inactive_anon: 0
active_file: 0
pgfault: 964
inactive_file: 0
total_pgpgin: 477
max_usage: 6651904
usage: 6537216
failcnt: 0
limit: 67108864
blkio_stats: {}
cpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24472255
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100215355
usage_in_kernelmode: 30000000
system_cpu_usage: 739306590000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
precpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24350896
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100093996
usage_in_kernelmode: 30000000
system_cpu_usage: 9492140000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "stream"
in: "query"
description: |
Stream the output. If false, the stats will be output once and then
it will disconnect.
type: "boolean"
default: true
- name: "one-shot"
in: "query"
description: |
Only get a single stat instead of waiting for 2 cycles. Must be used
with `stream=false`.
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/resize:
post:
summary: "Resize a container TTY"
description: "Resize the TTY for a container."
operationId: "ContainerResize"
consumes:
- "application/octet-stream"
produces:
- "text/plain"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "cannot resize container"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Container"]
/containers/{id}/start:
post:
summary: "Start a container"
operationId: "ContainerStart"
responses:
204:
description: "no error"
304:
description: "container already started"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container. Format is a
single character `[a-Z]` or `ctrl-<value>` where `<value>` is one
of: `a-z`, `@`, `^`, `[`, `,` or `_`.
type: "string"
tags: ["Container"]
/containers/{id}/stop:
post:
summary: "Stop a container"
operationId: "ContainerStop"
responses:
204:
description: "no error"
304:
description: "container already stopped"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/restart:
post:
summary: "Restart a container"
operationId: "ContainerRestart"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/kill:
post:
summary: "Kill a container"
description: |
Send a POSIX signal to a container, defaulting to killing to the
container.
operationId: "ContainerKill"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is not running"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "Container d37cde0fe4ad63c3a7252023b2f9800282894247d145cb5933ddf6e52cc03a28 is not running"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
default: "SIGKILL"
tags: ["Container"]
/containers/{id}/update:
post:
summary: "Update a container"
description: |
Change various configuration options of a container without having to
recreate it.
operationId: "ContainerUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "The container has been updated."
schema:
type: "object"
title: "ContainerUpdateResponse"
description: "OK response to ContainerUpdate operation"
properties:
Warnings:
type: "array"
items:
type: "string"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "update"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
example:
BlkioWeight: 300
CpuShares: 512
CpuPeriod: 100000
CpuQuota: 50000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpusetCpus: "0,1"
CpusetMems: "0"
Memory: 314572800
MemorySwap: 514288000
MemoryReservation: 209715200
RestartPolicy:
MaximumRetryCount: 4
Name: "on-failure"
tags: ["Container"]
/containers/{id}/rename:
post:
summary: "Rename a container"
operationId: "ContainerRename"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "name already in use"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "name"
in: "query"
required: true
description: "New name for the container"
type: "string"
tags: ["Container"]
/containers/{id}/pause:
post:
summary: "Pause a container"
description: |
Use the freezer cgroup to suspend all processes in a container.
Traditionally, when suspending a process the `SIGSTOP` signal is used,
which is observable by the process being suspended. With the freezer
cgroup the process is unaware, and unable to capture, that it is being
suspended, and subsequently resumed.
operationId: "ContainerPause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/unpause:
post:
summary: "Unpause a container"
description: "Resume a container which has been paused."
operationId: "ContainerUnpause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/attach:
post:
summary: "Attach to a container"
description: |
Attach to a container to read its output or send it input. You can attach
to the same container multiple times and you can reattach to containers
that have been detached.
Either the `stream` or `logs` parameter must be `true` for this endpoint
to do anything.
See the [documentation for the `docker attach` command](https://docs.docker.com/engine/reference/commandline/attach/)
for more details.
### Hijacking
This endpoint hijacks the HTTP connection to transport `stdin`, `stdout`,
and `stderr` on the same socket.
This is the response from the daemon for an attach request:
```
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
[STREAM]
```
After the headers and two new lines, the TCP connection can now be used
for raw, bidirectional communication between the client and server.
To hint potential proxies about connection hijacking, the Docker client
can also optionally send connection upgrade headers.
For example, the client sends this request to upgrade the connection:
```
POST /containers/16253994b7c4/attach?stream=1&stdout=1 HTTP/1.1
Upgrade: tcp
Connection: Upgrade
```
The Docker daemon will respond with a `101 UPGRADED` response, and will
similarly follow with the raw stream:
```
HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp
[STREAM]
```
### Stream format
When the TTY setting is disabled in [`POST /containers/create`](#operation/ContainerCreate),
the HTTP Content-Type header is set to application/vnd.docker.multiplexed-stream
and the stream over the hijacked connected is multiplexed to separate out
`stdout` and `stderr`. The stream consists of a series of frames, each
containing a header and a payload.
The header contains the information which the stream writes (`stdout` or
`stderr`). It also contains the size of the associated frame encoded in
the last four bytes (`uint32`).
It is encoded on the first eight bytes like this:
```go
header := [8]byte{STREAM_TYPE, 0, 0, 0, SIZE1, SIZE2, SIZE3, SIZE4}
```
`STREAM_TYPE` can be:
- 0: `stdin` (is written on `stdout`)
- 1: `stdout`
- 2: `stderr`
`SIZE1, SIZE2, SIZE3, SIZE4` are the four bytes of the `uint32` size
encoded as big endian.
Following the header is the payload, which is the specified number of
bytes of `STREAM_TYPE`.
The simplest way to implement this protocol is the following:
1. Read 8 bytes.
2. Choose `stdout` or `stderr` depending on the first byte.
3. Extract the frame size from the last four bytes.
4. Read the extracted size and output it on the correct output.
5. Goto 1.
### Stream format when using a TTY
When the TTY setting is enabled in [`POST /containers/create`](#operation/ContainerCreate),
the stream is not multiplexed. The data exchanged over the hijacked
connection is simply the raw data from the process PTY and client's
`stdin`.
operationId: "ContainerAttach"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,` or `_`.
type: "string"
- name: "logs"
in: "query"
description: |
Replay previous logs from the container.
This is useful for attaching to a container that has started and you
want to output everything since the container started.
If `stream` is also enabled, once all the previous output has been
returned, it will seamlessly transition into streaming current
output.
type: "boolean"
default: false
- name: "stream"
in: "query"
description: |
Stream attached streams from the time the request was made onwards.
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/attach/ws:
get:
summary: "Attach to a container via a websocket"
operationId: "ContainerAttachWebsocket"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,`, or `_`.
type: "string"
- name: "logs"
in: "query"
description: "Return logs"
type: "boolean"
default: false
- name: "stream"
in: "query"
description: "Return stream"
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/wait:
post:
summary: "Wait for a container"
description: "Block until a container stops, then returns the exit code."
operationId: "ContainerWait"
produces: ["application/json"]
responses:
200:
description: "The container has exit."
schema:
$ref: "#/definitions/ContainerWaitResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "condition"
in: "query"
description: |
Wait until a container state reaches the given condition.
Defaults to `not-running` if omitted or empty.
type: "string"
enum:
- "not-running"
- "next-exit"
- "removed"
default: "not-running"
tags: ["Container"]
/containers/{id}:
delete:
summary: "Remove a container"
operationId: "ContainerDelete"
responses:
204:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: |
You cannot remove a running container: c2ada9df5af8. Stop the
container before attempting removal or force remove
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "v"
in: "query"
description: "Remove anonymous volumes associated with the container."
type: "boolean"
default: false
- name: "force"
in: "query"
description: "If the container is running, kill it before removing it."
type: "boolean"
default: false
- name: "link"
in: "query"
description: "Remove the specified link associated with the container."
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/archive:
head:
summary: "Get information about files in a container"
description: |
A response header `X-Docker-Container-Path-Stat` is returned, containing
a base64 - encoded JSON object with some filesystem header information
about the path.
operationId: "ContainerArchiveInfo"
responses:
200:
description: "no error"
headers:
X-Docker-Container-Path-Stat:
type: "string"
description: |
A base64 - encoded JSON object with some filesystem header
information about the path
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
get:
summary: "Get an archive of a filesystem resource in a container"
description: "Get a tar archive of a resource in the filesystem of container id."
operationId: "ContainerArchive"
produces: ["application/x-tar"]
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
put:
summary: "Extract an archive of files or folders to a directory in a container"
description: |
Upload a tar archive to be extracted to a path in the filesystem of container id.
`path` parameter is asserted to be a directory. If it exists as a file, 400 error
will be returned with message "not a directory".
operationId: "PutContainerArchive"
consumes: ["application/x-tar", "application/octet-stream"]
responses:
200:
description: "The content was extracted successfully"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "not a directory"
403:
description: "Permission denied, the volume or container rootfs is marked as read-only."
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such container or path does not exist inside the container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Path to a directory in the container to extract the archive’s contents into. "
type: "string"
- name: "noOverwriteDirNonDir"
in: "query"
description: |
If `1`, `true`, or `True` then it will be an error if unpacking the
given content would cause an existing directory to be replaced with
a non-directory and vice versa.
type: "string"
- name: "copyUIDGID"
in: "query"
description: |
If `1`, `true`, then it will copy UID/GID maps to the dest file or
dir
type: "string"
- name: "inputStream"
in: "body"
required: true
description: |
The input stream must be a tar archive compressed with one of the
following algorithms: `identity` (no compression), `gzip`, `bzip2`,
or `xz`.
schema:
type: "string"
format: "binary"
tags: ["Container"]
/containers/prune:
post:
summary: "Delete stopped containers"
produces:
- "application/json"
operationId: "ContainerPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune containers created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune containers with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ContainerPruneResponse"
properties:
ContainersDeleted:
description: "Container IDs that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/images/json:
get:
summary: "List Images"
description: "Returns a list of images on the server. Note that it uses a different, smaller representation of an image than inspecting a single image."
operationId: "ImageList"
produces:
- "application/json"
responses:
200:
description: "Summary image data for the images matching the query"
schema:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "all"
in: "query"
description: "Show all images. Only images from a final layer (no children) are shown by default."
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the images list.
Available filters:
- `before`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
- `dangling=true`
- `label=key` or `label="key=value"` of an image label
- `reference`=(`<image-name>[:<tag>]`)
- `since`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
type: "string"
- name: "shared-size"
in: "query"
description: "Compute and show shared size as a `SharedSize` field on each image."
type: "boolean"
default: false
- name: "digests"
in: "query"
description: "Show digest information as a `RepoDigests` field on each image."
type: "boolean"
default: false
tags: ["Image"]
/build:
post:
summary: "Build an image"
description: |
Build an image from a tar archive with a `Dockerfile` in it.
The `Dockerfile` specifies how the image is built from the tar archive. It is typically in the archive's root, but can be at a different path or have a different name by specifying the `dockerfile` parameter. [See the `Dockerfile` reference for more information](https://docs.docker.com/engine/reference/builder/).
The Docker daemon performs a preliminary validation of the `Dockerfile` before starting the build, and returns an error if the syntax is incorrect. After that, each instruction is run one-by-one until the ID of the new image is output.
The build is canceled if the client drops the connection by quitting or being killed.
operationId: "ImageBuild"
consumes:
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "inputStream"
in: "body"
description: "A tar archive compressed with one of the following algorithms: identity (no compression), gzip, bzip2, xz."
schema:
type: "string"
format: "binary"
- name: "dockerfile"
in: "query"
description: "Path within the build context to the `Dockerfile`. This is ignored if `remote` is specified and points to an external `Dockerfile`."
type: "string"
default: "Dockerfile"
- name: "t"
in: "query"
description: "A name and optional tag to apply to the image in the `name:tag` format. If you omit the tag the default `latest` value is assumed. You can provide several `t` parameters."
type: "string"
- name: "extrahosts"
in: "query"
description: "Extra hosts to add to /etc/hosts"
type: "string"
- name: "remote"
in: "query"
description: "A Git repository URI or HTTP/HTTPS context URI. If the URI points to a single text file, the file’s contents are placed into a file called `Dockerfile` and the image is built from that file. If the URI points to a tarball, the file is downloaded by the daemon and the contents therein used as the context for the build. If the URI points to a tarball and the `dockerfile` parameter is also specified, there must be a file with the corresponding path inside the tarball."
type: "string"
- name: "q"
in: "query"
description: "Suppress verbose build output."
type: "boolean"
default: false
- name: "nocache"
in: "query"
description: "Do not use the cache when building the image."
type: "boolean"
default: false
- name: "cachefrom"
in: "query"
description: "JSON array of images used for build cache resolution."
type: "string"
- name: "pull"
in: "query"
description: "Attempt to pull the image even if an older image exists locally."
type: "string"
- name: "rm"
in: "query"
description: "Remove intermediate containers after a successful build."
type: "boolean"
default: true
- name: "forcerm"
in: "query"
description: "Always remove intermediate containers, even upon failure."
type: "boolean"
default: false
- name: "memory"
in: "query"
description: "Set memory limit for build."
type: "integer"
- name: "memswap"
in: "query"
description: "Total memory (memory + swap). Set as `-1` to disable swap."
type: "integer"
- name: "cpushares"
in: "query"
description: "CPU shares (relative weight)."
type: "integer"
- name: "cpusetcpus"
in: "query"
description: "CPUs in which to allow execution (e.g., `0-3`, `0,1`)."
type: "string"
- name: "cpuperiod"
in: "query"
description: "The length of a CPU period in microseconds."
type: "integer"
- name: "cpuquota"
in: "query"
description: "Microseconds of CPU time that the container can get in a CPU period."
type: "integer"
- name: "buildargs"
in: "query"
description: >
JSON map of string pairs for build-time variables. Users pass these values at build-time. Docker
uses the buildargs as the environment context for commands run via the `Dockerfile` RUN
instruction, or for variable expansion in other `Dockerfile` instructions. This is not meant for
passing secret values.
For example, the build arg `FOO=bar` would become `{"FOO":"bar"}` in JSON. This would result in the
query parameter `buildargs={"FOO":"bar"}`. Note that `{"FOO":"bar"}` should be URI component encoded.
[Read more about the buildargs instruction.](https://docs.docker.com/engine/reference/builder/#arg)
type: "string"
- name: "shmsize"
in: "query"
description: "Size of `/dev/shm` in bytes. The size must be greater than 0. If omitted the system uses 64MB."
type: "integer"
- name: "squash"
in: "query"
description: "Squash the resulting images layers into a single layer. *(Experimental release only.)*"
type: "boolean"
- name: "labels"
in: "query"
description: "Arbitrary key/value labels to set on the image, as a JSON map of string pairs."
type: "string"
- name: "networkmode"
in: "query"
description: |
Sets the networking mode for the run commands during build. Supported
standard values are: `bridge`, `host`, `none`, and `container:<name|id>`.
Any other value is taken as a custom network's name or ID to which this
container should connect to.
type: "string"
- name: "Content-type"
in: "header"
type: "string"
enum:
- "application/x-tar"
default: "application/x-tar"
- name: "X-Registry-Config"
in: "header"
description: |
This is a base64-encoded JSON object with auth configurations for multiple registries that a build may refer to.
The key is a registry URL, and the value is an auth configuration object, [as described in the authentication section](#section/Authentication). For example:
```
{
"docker.example.com": {
"username": "janedoe",
"password": "hunter2"
},
"https://index.docker.io/v1/": {
"username": "mobydock",
"password": "conta1n3rize14"
}
}
```
Only the registry domain name (and port if not the default 443) are required. However, for legacy reasons, the Docker Hub registry must be specified with both a `https://` prefix and a `/v1/` suffix even though Docker will prefer to use the v2 registry API.
type: "string"
- name: "platform"
in: "query"
description: "Platform in the format os[/arch[/variant]]"
type: "string"
default: ""
- name: "target"
in: "query"
description: "Target build stage"
type: "string"
default: ""
- name: "outputs"
in: "query"
description: "BuildKit output configuration"
type: "string"
default: ""
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/build/prune:
post:
summary: "Delete builder cache"
produces:
- "application/json"
operationId: "BuildPrune"
parameters:
- name: "keep-storage"
in: "query"
description: "Amount of disk space in bytes to keep for cache"
type: "integer"
format: "int64"
- name: "all"
in: "query"
type: "boolean"
description: "Remove all types of build cache"
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the list of build cache objects.
Available filters:
- `until=<duration>`: duration relative to daemon's time, during which build cache was not used, in Go's duration format (e.g., '24h')
- `id=<id>`
- `parent=<id>`
- `type=<string>`
- `description=<string>`
- `inuse`
- `shared`
- `private`
responses:
200:
description: "No error"
schema:
type: "object"
title: "BuildPruneResponse"
properties:
CachesDeleted:
type: "array"
items:
description: "ID of build cache object"
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/images/create:
post:
summary: "Create an image"
description: "Create an image by either pulling it from a registry or importing it."
operationId: "ImageCreate"
consumes:
- "text/plain"
- "application/octet-stream"
produces:
- "application/json"
responses:
200:
description: "no error"
404:
description: "repository does not exist or no read access"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "fromImage"
in: "query"
description: "Name of the image to pull. The name may include a tag or digest. This parameter may only be used when pulling an image. The pull is cancelled if the HTTP connection is closed."
type: "string"
- name: "fromSrc"
in: "query"
description: "Source to import. The value may be a URL from which the image can be retrieved or `-` to read the image from the request body. This parameter may only be used when importing an image."
type: "string"
- name: "repo"
in: "query"
description: "Repository name given to an image when it is imported. The repo may include a tag. This parameter may only be used when importing an image."
type: "string"
- name: "tag"
in: "query"
description: "Tag or digest. If empty when pulling an image, this causes all tags for the given image to be pulled."
type: "string"
- name: "message"
in: "query"
description: "Set commit message for imported image."
type: "string"
- name: "inputImage"
in: "body"
description: "Image content if the value `-` has been specified in fromSrc query parameter"
schema:
type: "string"
required: false
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "changes"
in: "query"
description: |
Apply `Dockerfile` instructions to the image that is created,
for example: `changes=ENV DEBUG=true`.
Note that `ENV DEBUG=true` should be URI component encoded.
Supported `Dockerfile` instructions:
`CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
type: "array"
items:
type: "string"
- name: "platform"
in: "query"
description: |
Platform in the format os[/arch[/variant]].
When used in combination with the `fromImage` option, the daemon checks
if the given image is present in the local image cache with the given
OS and Architecture, and otherwise attempts to pull the image. If the
option is not set, the host's native OS and Architecture are used.
If the given image does not exist in the local image cache, the daemon
attempts to pull the image with the host's native OS and Architecture.
If the given image does exists in the local image cache, but its OS or
architecture does not match, a warning is produced.
When used with the `fromSrc` option to import an image from an archive,
this option sets the platform information for the imported image. If
the option is not set, the host's native OS and Architecture are used
for the imported image.
type: "string"
default: ""
tags: ["Image"]
/images/{name}/json:
get:
summary: "Inspect an image"
description: "Return low-level information about an image."
operationId: "ImageInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/ImageInspect"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Image"]
/images/{name}/history:
get:
summary: "Get the history of an image"
description: "Return parent layers of an image."
operationId: "ImageHistory"
produces: ["application/json"]
responses:
200:
description: "List of image layers"
schema:
type: "array"
items:
type: "object"
x-go-name: HistoryResponseItem
title: "HistoryResponseItem"
description: "individual image layer information in response to ImageHistory operation"
required: [Id, Created, CreatedBy, Tags, Size, Comment]
properties:
Id:
type: "string"
x-nullable: false
Created:
type: "integer"
format: "int64"
x-nullable: false
CreatedBy:
type: "string"
x-nullable: false
Tags:
type: "array"
items:
type: "string"
Size:
type: "integer"
format: "int64"
x-nullable: false
Comment:
type: "string"
x-nullable: false
examples:
application/json:
- Id: "3db9c44f45209632d6050b35958829c3a2aa256d81b9a7be45b362ff85c54710"
Created: 1398108230
CreatedBy: "/bin/sh -c #(nop) ADD file:eb15dbd63394e063b805a3c32ca7bf0266ef64676d5a6fab4801f2e81e2a5148 in /"
Tags:
- "ubuntu:lucid"
- "ubuntu:10.04"
Size: 182964289
Comment: ""
- Id: "6cfa4d1f33fb861d4d114f43b25abd0ac737509268065cdfd69d544a59c85ab8"
Created: 1398108222
CreatedBy: "/bin/sh -c #(nop) MAINTAINER Tianon Gravi <[email protected]> - mkimage-debootstrap.sh -i iproute,iputils-ping,ubuntu-minimal -t lucid.tar.xz lucid http://archive.ubuntu.com/ubuntu/"
Tags: []
Size: 0
Comment: ""
- Id: "511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158"
Created: 1371157430
CreatedBy: ""
Tags:
- "scratch12:latest"
- "scratch:latest"
Size: 0
Comment: "Imported from -"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/{name}/push:
post:
summary: "Push an image"
description: |
Push an image to a registry.
If you wish to push an image on to a private registry, that image must
already have a tag which references the registry. For example,
`registry.example.com/myimage:latest`.
The push is cancelled if the HTTP connection is closed.
operationId: "ImagePush"
consumes:
- "application/octet-stream"
responses:
200:
description: "No error"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID."
type: "string"
required: true
- name: "tag"
in: "query"
description: "The tag to associate with the image on the registry."
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
required: true
tags: ["Image"]
/images/{name}/tag:
post:
summary: "Tag an image"
description: "Tag an image so that it becomes part of a repository."
operationId: "ImageTag"
responses:
201:
description: "No error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID to tag."
type: "string"
required: true
- name: "repo"
in: "query"
description: "The repository to tag in. For example, `someuser/someimage`."
type: "string"
- name: "tag"
in: "query"
description: "The name of the new tag."
type: "string"
tags: ["Image"]
/images/{name}:
delete:
summary: "Remove an image"
description: |
Remove an image, along with any untagged parent images that were
referenced by that image.
Images can't be removed if they have descendant images, are being
used by a running container or are being used by a build.
operationId: "ImageDelete"
produces: ["application/json"]
responses:
200:
description: "The image was deleted successfully"
schema:
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
examples:
application/json:
- Untagged: "3e2f21a89f"
- Deleted: "3e2f21a89f"
- Deleted: "53b4f83ac9"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
- name: "force"
in: "query"
description: "Remove the image even if it is being used by stopped containers or has other tags"
type: "boolean"
default: false
- name: "noprune"
in: "query"
description: "Do not delete untagged parent images"
type: "boolean"
default: false
tags: ["Image"]
/images/search:
get:
summary: "Search images"
description: "Search for an image on Docker Hub."
operationId: "ImageSearch"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
type: "object"
title: "ImageSearchResponseItem"
properties:
description:
type: "string"
is_official:
type: "boolean"
is_automated:
type: "boolean"
name:
type: "string"
star_count:
type: "integer"
examples:
application/json:
- description: ""
is_official: false
is_automated: false
name: "wma55/u1210sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "jdswinbank/sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "vgauthier/sshd"
star_count: 0
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "term"
in: "query"
description: "Term to search"
type: "string"
required: true
- name: "limit"
in: "query"
description: "Maximum number of results to return"
type: "integer"
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to process on the images list. Available filters:
- `is-automated=(true|false)`
- `is-official=(true|false)`
- `stars=<number>` Matches images that has at least 'number' stars.
type: "string"
tags: ["Image"]
/images/prune:
post:
summary: "Delete unused images"
produces:
- "application/json"
operationId: "ImagePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`). Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), prune only
unused *and* untagged images. When set to `false`
(or `0`), all unused images are pruned.
- `until=<string>` Prune images created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune images with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ImagePruneResponse"
properties:
ImagesDeleted:
description: "Images that were deleted"
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/auth:
post:
summary: "Check auth configuration"
description: |
Validate credentials for a registry and, if available, get an identity
token for accessing the registry without password.
operationId: "SystemAuth"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "An identity token was generated successfully."
schema:
type: "object"
title: "SystemAuthResponse"
required: [Status]
properties:
Status:
description: "The status of the authentication"
type: "string"
x-nullable: false
IdentityToken:
description: "An opaque token used to authenticate a user after a successful login"
type: "string"
x-nullable: false
examples:
application/json:
Status: "Login Succeeded"
IdentityToken: "9cbaf023786cd7..."
204:
description: "No error"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "authConfig"
in: "body"
description: "Authentication to check"
schema:
$ref: "#/definitions/AuthConfig"
tags: ["System"]
/info:
get:
summary: "Get system information"
operationId: "SystemInfo"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/SystemInfo"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/version:
get:
summary: "Get version"
description: "Returns the version of Docker that is running and various information about the system that Docker is running on."
operationId: "SystemVersion"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/SystemVersion"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/_ping:
get:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPing"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "OK"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
headers:
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
tags: ["System"]
head:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPingHead"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "(empty)"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/commit:
post:
summary: "Create a new image from a container"
operationId: "ImageCommit"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "containerConfig"
in: "body"
description: "The container configuration"
schema:
$ref: "#/definitions/ContainerConfig"
- name: "container"
in: "query"
description: "The ID or name of the container to commit"
type: "string"
- name: "repo"
in: "query"
description: "Repository name for the created image"
type: "string"
- name: "tag"
in: "query"
description: "Tag name for the create image"
type: "string"
- name: "comment"
in: "query"
description: "Commit message"
type: "string"
- name: "author"
in: "query"
description: "Author of the image (e.g., `John Hannibal Smith <[email protected]>`)"
type: "string"
- name: "pause"
in: "query"
description: "Whether to pause the container before committing"
type: "boolean"
default: true
- name: "changes"
in: "query"
description: "`Dockerfile` instructions to apply while committing"
type: "string"
tags: ["Image"]
/events:
get:
summary: "Monitor events"
description: |
Stream real-time events from the server.
Various objects within Docker report events when something happens to them.
Containers report these events: `attach`, `commit`, `copy`, `create`, `destroy`, `detach`, `die`, `exec_create`, `exec_detach`, `exec_start`, `exec_die`, `export`, `health_status`, `kill`, `oom`, `pause`, `rename`, `resize`, `restart`, `start`, `stop`, `top`, `unpause`, `update`, and `prune`
Images report these events: `delete`, `import`, `load`, `pull`, `push`, `save`, `tag`, `untag`, and `prune`
Volumes report these events: `create`, `mount`, `unmount`, `destroy`, and `prune`
Networks report these events: `create`, `connect`, `disconnect`, `destroy`, `update`, `remove`, and `prune`
The Docker daemon reports these events: `reload`
Services report these events: `create`, `update`, and `remove`
Nodes report these events: `create`, `update`, and `remove`
Secrets report these events: `create`, `update`, and `remove`
Configs report these events: `create`, `update`, and `remove`
The Builder reports `prune` events
operationId: "SystemEvents"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/EventMessage"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "since"
in: "query"
description: "Show events created since this timestamp then stream new events."
type: "string"
- name: "until"
in: "query"
description: "Show events created until this timestamp then stop streaming."
type: "string"
- name: "filters"
in: "query"
description: |
A JSON encoded value of filters (a `map[string][]string`) to process on the event list. Available filters:
- `config=<string>` config name or ID
- `container=<string>` container name or ID
- `daemon=<string>` daemon name or ID
- `event=<string>` event type
- `image=<string>` image name or ID
- `label=<string>` image or container label
- `network=<string>` network name or ID
- `node=<string>` node ID
- `plugin`=<string> plugin name or ID
- `scope`=<string> local or swarm
- `secret=<string>` secret name or ID
- `service=<string>` service name or ID
- `type=<string>` object to filter by, one of `container`, `image`, `volume`, `network`, `daemon`, `plugin`, `node`, `service`, `secret` or `config`
- `volume=<string>` volume name
type: "string"
tags: ["System"]
/system/df:
get:
summary: "Get data usage information"
operationId: "SystemDataUsage"
responses:
200:
description: "no error"
schema:
type: "object"
title: "SystemDataUsageResponse"
properties:
LayersSize:
type: "integer"
format: "int64"
Images:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
Containers:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
Volumes:
type: "array"
items:
$ref: "#/definitions/Volume"
BuildCache:
type: "array"
items:
$ref: "#/definitions/BuildCache"
example:
LayersSize: 1092588
Images:
-
Id: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
ParentId: ""
RepoTags:
- "busybox:latest"
RepoDigests:
- "busybox@sha256:a59906e33509d14c036c8678d687bd4eec81ed7c4b8ce907b888c607f6a1e0e6"
Created: 1466724217
Size: 1092588
SharedSize: 0
VirtualSize: 1092588
Labels: {}
Containers: 1
Containers:
-
Id: "e575172ed11dc01bfce087fb27bee502db149e1a0fad7c296ad300bbff178148"
Names:
- "/top"
Image: "busybox"
ImageID: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
Command: "top"
Created: 1472592424
Ports: []
SizeRootFs: 1092588
Labels: {}
State: "exited"
Status: "Exited (0) 56 minutes ago"
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
IPAMConfig: null
Links: null
Aliases: null
NetworkID: "d687bc59335f0e5c9ee8193e5612e8aee000c8c62ea170cfb99c098f95899d92"
EndpointID: "8ed5115aeaad9abb174f68dcf135b49f11daf597678315231a32ca28441dec6a"
Gateway: "172.18.0.1"
IPAddress: "172.18.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Mounts: []
Volumes:
-
Name: "my-volume"
Driver: "local"
Mountpoint: "/var/lib/docker/volumes/my-volume/_data"
Labels: null
Scope: "local"
Options: null
UsageData:
Size: 10920104
RefCount: 2
BuildCache:
-
ID: "hw53o5aio51xtltp5xjp8v7fx"
Parent: ""
Type: "regular"
Description: "pulled from docker.io/library/debian@sha256:234cb88d3020898631af0ccbbcca9a66ae7306ecd30c9720690858c1b007d2a0"
InUse: false
Shared: true
Size: 0
CreatedAt: "2021-06-28T13:31:01.474619385Z"
LastUsedAt: "2021-07-07T22:02:32.738075951Z"
UsageCount: 26
-
ID: "ndlpt0hhvkqcdfkputsk4cq9c"
Parent: "hw53o5aio51xtltp5xjp8v7fx"
Type: "regular"
Description: "mount / from exec /bin/sh -c echo 'Binary::apt::APT::Keep-Downloaded-Packages \"true\";' > /etc/apt/apt.conf.d/keep-cache"
InUse: false
Shared: true
Size: 51
CreatedAt: "2021-06-28T13:31:03.002625487Z"
LastUsedAt: "2021-07-07T22:02:32.773909517Z"
UsageCount: 26
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "type"
in: "query"
description: |
Object types, for which to compute and return data.
type: "array"
collectionFormat: multi
items:
type: "string"
enum: ["container", "image", "volume", "build-cache"]
tags: ["System"]
/images/{name}/get:
get:
summary: "Export an image"
description: |
Get a tarball containing all images and metadata for a repository.
If `name` is a specific name and tag (e.g. `ubuntu:latest`), then only that image (and its parents) are returned. If `name` is an image ID, similarly only that image (and its parents) are returned, but with the exclusion of the `repositories` file in the tarball, as there were no image names referenced.
### Image tarball format
An image tarball contains one directory per image layer (named using its long ID), each containing these files:
- `VERSION`: currently `1.0` - the file format version
- `json`: detailed layer information, similar to `docker inspect layer_id`
- `layer.tar`: A tarfile containing the filesystem changes in this layer
The `layer.tar` file contains `aufs` style `.wh..wh.aufs` files and directories for storing attribute changes and deletions.
If the tarball defines a repository, the tarball should also include a `repositories` file at the root that contains a list of repository and tag names mapped to layer IDs.
```json
{
"hello-world": {
"latest": "565a9d68a73f6706862bfe8409a7f659776d4d60a8d096eb4a3cbce6999cc2a1"
}
}
```
operationId: "ImageGet"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/get:
get:
summary: "Export several images"
description: |
Get a tarball containing all images and metadata for several image
repositories.
For each value of the `names` parameter: if it is a specific name and
tag (e.g. `ubuntu:latest`), then only that image (and its parents) are
returned; if it is an image ID, similarly only that image (and its parents)
are returned and there would be no names referenced in the 'repositories'
file for this image ID.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageGetAll"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "names"
in: "query"
description: "Image names to filter by"
type: "array"
items:
type: "string"
tags: ["Image"]
/images/load:
post:
summary: "Import images"
description: |
Load a set of images and tags into a repository.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageLoad"
consumes:
- "application/x-tar"
produces:
- "application/json"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "imagesTarball"
in: "body"
description: "Tar archive containing images"
schema:
type: "string"
format: "binary"
- name: "quiet"
in: "query"
description: "Suppress progress details during load."
type: "boolean"
default: false
tags: ["Image"]
/containers/{id}/exec:
post:
summary: "Create an exec instance"
description: "Run a command inside a running container."
operationId: "ContainerExec"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is paused"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execConfig"
in: "body"
description: "Exec configuration"
schema:
type: "object"
title: "ExecConfig"
properties:
AttachStdin:
type: "boolean"
description: "Attach to `stdin` of the exec command."
AttachStdout:
type: "boolean"
description: "Attach to `stdout` of the exec command."
AttachStderr:
type: "boolean"
description: "Attach to `stderr` of the exec command."
DetachKeys:
type: "string"
description: |
Override the key sequence for detaching a container. Format is
a single character `[a-Z]` or `ctrl-<value>` where `<value>`
is one of: `a-z`, `@`, `^`, `[`, `,` or `_`.
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
Env:
description: |
A list of environment variables in the form `["VAR=value", ...]`.
type: "array"
items:
type: "string"
Cmd:
type: "array"
description: "Command to run, as a string or array of strings."
items:
type: "string"
Privileged:
type: "boolean"
description: "Runs the exec process with extended privileges."
default: false
User:
type: "string"
description: |
The user, and optionally, group to run the exec process inside
the container. Format is one of: `user`, `user:group`, `uid`,
or `uid:gid`.
WorkingDir:
type: "string"
description: |
The working directory for the exec process inside the container.
example:
AttachStdin: false
AttachStdout: true
AttachStderr: true
DetachKeys: "ctrl-p,ctrl-q"
Tty: false
Cmd:
- "date"
Env:
- "FOO=bar"
- "BAZ=quux"
required: true
- name: "id"
in: "path"
description: "ID or name of container"
type: "string"
required: true
tags: ["Exec"]
/exec/{id}/start:
post:
summary: "Start an exec instance"
description: |
Starts a previously set up exec instance. If detach is true, this endpoint
returns immediately after starting the command. Otherwise, it sets up an
interactive session with the command.
operationId: "ExecStart"
consumes:
- "application/json"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "No error"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Container is stopped or paused"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execStartConfig"
in: "body"
schema:
type: "object"
title: "ExecStartConfig"
properties:
Detach:
type: "boolean"
description: "Detach from the command."
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
example:
Detach: false
Tty: false
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/exec/{id}/resize:
post:
summary: "Resize an exec instance"
description: |
Resize the TTY session used by an exec instance. This endpoint only works
if `tty` was specified as part of creating and starting the exec instance.
operationId: "ExecResize"
responses:
200:
description: "No error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Exec"]
/exec/{id}/json:
get:
summary: "Inspect an exec instance"
description: "Return low-level information about an exec instance."
operationId: "ExecInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ExecInspectResponse"
properties:
CanRemove:
type: "boolean"
DetachKeys:
type: "string"
ID:
type: "string"
Running:
type: "boolean"
ExitCode:
type: "integer"
ProcessConfig:
$ref: "#/definitions/ProcessConfig"
OpenStdin:
type: "boolean"
OpenStderr:
type: "boolean"
OpenStdout:
type: "boolean"
ContainerID:
type: "string"
Pid:
type: "integer"
description: "The system process ID for the exec process."
examples:
application/json:
CanRemove: false
ContainerID: "b53ee82b53a40c7dca428523e34f741f3abc51d9f297a14ff874bf761b995126"
DetachKeys: ""
ExitCode: 2
ID: "f33bbfb39f5b142420f4759b2348913bd4a8d1a6d7fd56499cb41a1bb91d7b3b"
OpenStderr: true
OpenStdin: true
OpenStdout: true
ProcessConfig:
arguments:
- "-c"
- "exit 2"
entrypoint: "sh"
privileged: false
tty: true
user: "1000"
Running: false
Pid: 42000
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/volumes:
get:
summary: "List volumes"
operationId: "VolumeList"
produces: ["application/json"]
responses:
200:
description: "Summary volume data that matches the query"
schema:
$ref: "#/definitions/VolumeListResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to
process on the volumes list. Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
volumes that are not in use by a container. When set to `false`
(or `0`), only volumes that are in use by one or more
containers are returned.
- `driver=<volume-driver-name>` Matches volumes based on their driver.
- `label=<key>` or `label=<key>:<value>` Matches volumes based on
the presence of a `label` alone or a `label` and a value.
- `name=<volume-name>` Matches all or part of a volume name.
type: "string"
format: "json"
tags: ["Volume"]
/volumes/create:
post:
summary: "Create a volume"
operationId: "VolumeCreate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
201:
description: "The volume was created successfully"
schema:
$ref: "#/definitions/Volume"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "volumeConfig"
in: "body"
required: true
description: "Volume configuration"
schema:
$ref: "#/definitions/VolumeCreateOptions"
tags: ["Volume"]
/volumes/{name}:
get:
summary: "Inspect a volume"
operationId: "VolumeInspect"
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Volume"
404:
description: "No such volume"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
tags: ["Volume"]
put:
summary: |
"Update a volume. Valid only for Swarm cluster volumes"
operationId: "VolumeUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such volume"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "The name or ID of the volume"
type: "string"
required: true
- name: "body"
in: "body"
schema:
# though the schema for is an object that contains only a
# ClusterVolumeSpec, wrapping the ClusterVolumeSpec in this object
# means that if, later on, we support things like changing the
# labels, we can do so without duplicating that information to the
# ClusterVolumeSpec.
type: "object"
description: "Volume configuration"
properties:
Spec:
$ref: "#/definitions/ClusterVolumeSpec"
description: |
The spec of the volume to update. Currently, only Availability may
change. All other fields must remain unchanged.
- name: "version"
in: "query"
description: |
The version number of the volume being updated. This is required to
avoid conflicting writes. Found in the volume's `ClusterVolume`
field.
type: "integer"
format: "int64"
required: true
tags: ["Volume"]
delete:
summary: "Remove a volume"
description: "Instruct the driver to remove the volume."
operationId: "VolumeDelete"
responses:
204:
description: "The volume was removed"
404:
description: "No such volume or volume driver"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Volume is in use and cannot be removed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
- name: "force"
in: "query"
description: "Force the removal of the volume"
type: "boolean"
default: false
tags: ["Volume"]
/volumes/prune:
post:
summary: "Delete unused volumes"
produces:
- "application/json"
operationId: "VolumePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune volumes with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "VolumePruneResponse"
properties:
VolumesDeleted:
description: "Volumes that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Volume"]
/networks:
get:
summary: "List networks"
description: |
Returns a list of networks. For details on the format, see the
[network inspect endpoint](#operation/NetworkInspect).
Note that it uses a different, smaller representation of a network than
inspecting a single network. For example, the list of containers attached
to the network is not propagated in API versions 1.28 and up.
operationId: "NetworkList"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Network"
examples:
application/json:
- Name: "bridge"
Id: "f2de39df4171b0dc801e8002d1d999b77256983dfc63041c0f34030aa3977566"
Created: "2016-10-19T06:21:00.416543526Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config:
-
Subnet: "172.17.0.0/16"
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
- Name: "none"
Id: "e086a3893b05ab69242d3c44e49483a3bbbd3a26b46baa8f61ab797c1088d794"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "null"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
- Name: "host"
Id: "13e871235c677f196c4e1ecebb9dc733b9b2d2ab589e30c539efeda84a24215e"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "host"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to process
on the networks list.
Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
networks that are not in use by a container. When set to `false`
(or `0`), only networks that are in use by one or more
containers are returned.
- `driver=<driver-name>` Matches a network's driver.
- `id=<network-id>` Matches all or part of a network ID.
- `label=<key>` or `label=<key>=<value>` of a network label.
- `name=<network-name>` Matches all or part of a network name.
- `scope=["swarm"|"global"|"local"]` Filters networks by scope (`swarm`, `global`, or `local`).
- `type=["custom"|"builtin"]` Filters networks by type. The `custom` keyword returns all user-defined networks.
type: "string"
tags: ["Network"]
/networks/{id}:
get:
summary: "Inspect a network"
operationId: "NetworkInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Network"
404:
description: "Network not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "verbose"
in: "query"
description: "Detailed inspect output for troubleshooting"
type: "boolean"
default: false
- name: "scope"
in: "query"
description: "Filter the network by scope (swarm, global, or local)"
type: "string"
tags: ["Network"]
delete:
summary: "Remove a network"
operationId: "NetworkDelete"
responses:
204:
description: "No error"
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such network"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
tags: ["Network"]
/networks/create:
post:
summary: "Create a network"
operationId: "NetworkCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "No error"
schema:
type: "object"
title: "NetworkCreateResponse"
properties:
Id:
description: "The ID of the created network."
type: "string"
Warning:
type: "string"
example:
Id: "22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30"
Warning: ""
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "plugin not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "networkConfig"
in: "body"
description: "Network configuration"
required: true
schema:
type: "object"
title: "NetworkCreateRequest"
required: ["Name"]
properties:
Name:
description: "The network's name."
type: "string"
CheckDuplicate:
description: |
Check for networks with duplicate names. Since Network is
primarily keyed based on a random ID and not on the name, and
network name is strictly a user-friendly alias to the network
which is uniquely identified using ID, there is no guaranteed
way to check for duplicates. CheckDuplicate is there to provide
a best effort checking of any networks which has the same name
but it is not guaranteed to catch all name collisions.
type: "boolean"
Driver:
description: "Name of the network driver plugin to use."
type: "string"
default: "bridge"
Internal:
description: "Restrict external access to the network."
type: "boolean"
Attachable:
description: |
Globally scoped network is manually attachable by regular
containers from workers in swarm mode.
type: "boolean"
Ingress:
description: |
Ingress network is the network which provides the routing-mesh
in swarm mode.
type: "boolean"
IPAM:
description: "Optional custom IP scheme for the network."
$ref: "#/definitions/IPAM"
EnableIPv6:
description: "Enable IPv6 on the network."
type: "boolean"
Options:
description: "Network specific options to be used by the drivers."
type: "object"
additionalProperties:
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
Name: "isolated_nw"
CheckDuplicate: false
Driver: "bridge"
EnableIPv6: true
IPAM:
Driver: "default"
Config:
- Subnet: "172.20.0.0/16"
IPRange: "172.20.10.0/24"
Gateway: "172.20.10.11"
- Subnet: "2001:db8:abcd::/64"
Gateway: "2001:db8:abcd::1011"
Options:
foo: "bar"
Internal: true
Attachable: false
Ingress: false
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
tags: ["Network"]
/networks/{id}/connect:
post:
summary: "Connect a container to a network"
operationId: "NetworkConnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkConnectRequest"
properties:
Container:
type: "string"
description: "The ID or name of the container to connect to the network."
EndpointConfig:
$ref: "#/definitions/EndpointSettings"
example:
Container: "3613f73ba0e4"
EndpointConfig:
IPAMConfig:
IPv4Address: "172.24.56.89"
IPv6Address: "2001:db8::5689"
tags: ["Network"]
/networks/{id}/disconnect:
post:
summary: "Disconnect a container from a network"
operationId: "NetworkDisconnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkDisconnectRequest"
properties:
Container:
type: "string"
description: |
The ID or name of the container to disconnect from the network.
Force:
type: "boolean"
description: |
Force the container to disconnect from the network.
tags: ["Network"]
/networks/prune:
post:
summary: "Delete unused networks"
produces:
- "application/json"
operationId: "NetworkPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune networks created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune networks with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "NetworkPruneResponse"
properties:
NetworksDeleted:
description: "Networks that were deleted"
type: "array"
items:
type: "string"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Network"]
/plugins:
get:
summary: "List plugins"
operationId: "PluginList"
description: "Returns information about installed plugins."
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Plugin"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the plugin list.
Available filters:
- `capability=<capability name>`
- `enable=<true>|<false>`
tags: ["Plugin"]
/plugins/privileges:
get:
summary: "Get plugin privileges"
operationId: "GetPluginPrivileges"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags:
- "Plugin"
/plugins/pull:
post:
summary: "Install a plugin"
operationId: "PluginPull"
description: |
Pulls and installs a plugin. After the plugin is installed, it can be
enabled using the [`POST /plugins/{name}/enable` endpoint](#operation/PostPluginsEnable).
produces:
- "application/json"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
Remote reference for plugin to install.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "name"
in: "query"
description: |
Local name for the pulled plugin.
The `:latest` tag is optional, and is used as the default if omitted.
required: false
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/{name}/json:
get:
summary: "Inspect a plugin"
operationId: "PluginInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}:
delete:
summary: "Remove a plugin"
operationId: "PluginDelete"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "force"
in: "query"
description: |
Disable the plugin before removing. This may result in issues if the
plugin is in use by a container.
type: "boolean"
default: false
tags: ["Plugin"]
/plugins/{name}/enable:
post:
summary: "Enable a plugin"
operationId: "PluginEnable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "timeout"
in: "query"
description: "Set the HTTP client timeout (in seconds)"
type: "integer"
default: 0
tags: ["Plugin"]
/plugins/{name}/disable:
post:
summary: "Disable a plugin"
operationId: "PluginDisable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}/upgrade:
post:
summary: "Upgrade a plugin"
operationId: "PluginUpgrade"
responses:
204:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "remote"
in: "query"
description: |
Remote reference to upgrade to.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/create:
post:
summary: "Create a plugin"
operationId: "PluginCreate"
consumes:
- "application/x-tar"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "tarContext"
in: "body"
description: "Path to tar containing plugin rootfs and manifest"
schema:
type: "string"
format: "binary"
tags: ["Plugin"]
/plugins/{name}/push:
post:
summary: "Push a plugin"
operationId: "PluginPush"
description: |
Push a plugin to the registry.
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
responses:
200:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/plugins/{name}/set:
post:
summary: "Configure a plugin"
operationId: "PluginSet"
consumes:
- "application/json"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
type: "string"
example: ["DEBUG=1"]
responses:
204:
description: "No error"
404:
description: "Plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/nodes:
get:
summary: "List nodes"
operationId: "NodeList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Node"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the nodes list, encoded as JSON (a `map[string][]string`).
Available filters:
- `id=<node id>`
- `label=<engine label>`
- `membership=`(`accepted`|`pending`)`
- `name=<node name>`
- `node.label=<node label>`
- `role=`(`manager`|`worker`)`
type: "string"
tags: ["Node"]
/nodes/{id}:
get:
summary: "Inspect a node"
operationId: "NodeInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Node"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
tags: ["Node"]
delete:
summary: "Delete a node"
operationId: "NodeDelete"
responses:
200:
description: "no error"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
- name: "force"
in: "query"
description: "Force remove a node from the swarm"
default: false
type: "boolean"
tags: ["Node"]
/nodes/{id}/update:
post:
summary: "Update a node"
operationId: "NodeUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID of the node"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/NodeSpec"
- name: "version"
in: "query"
description: |
The version number of the node object being updated. This is required
to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Node"]
/swarm:
get:
summary: "Inspect swarm"
operationId: "SwarmInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Swarm"
404:
description: "no such swarm"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/init:
post:
summary: "Initialize a new swarm"
operationId: "SwarmInit"
produces:
- "application/json"
- "text/plain"
responses:
200:
description: "no error"
schema:
description: "The node ID"
type: "string"
example: "7v2t30z9blmxuhnyo6s4cpenp"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmInitRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication, as well
as determining the networking interface used for the VXLAN
Tunnel Endpoint (VTEP). This can either be an address/port
combination in the form `192.168.1.1:4567`, or an interface
followed by a port number, like `eth0:4567`. If the port number
is omitted, the default swarm listening port is used.
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
if no port is set or is set to 0, default port 4789 will be used.
type: "integer"
format: "uint32"
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global
scope networks.
type: "array"
items:
type: "string"
example: ["10.10.0.0/16", "20.20.0.0/16"]
ForceNewCluster:
description: "Force creation of a new swarm."
type: "boolean"
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created
from the default subnet pool.
type: "integer"
format: "uint32"
Spec:
$ref: "#/definitions/SwarmSpec"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
DataPathPort: 4789
DefaultAddrPool: ["10.10.0.0/8", "20.20.0.0/8"]
SubnetSize: 24
ForceNewCluster: false
Spec:
Orchestration: {}
Raft: {}
Dispatcher: {}
CAConfig: {}
EncryptionConfig:
AutoLockManagers: false
tags: ["Swarm"]
/swarm/join:
post:
summary: "Join an existing swarm"
operationId: "SwarmJoin"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmJoinRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication if the node
gets promoted to manager, as well as determining the networking
interface used for the VXLAN Tunnel Endpoint (VTEP).
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
RemoteAddrs:
description: |
Addresses of manager nodes already participating in the swarm.
type: "array"
items:
type: "string"
JoinToken:
description: "Secret token for joining this swarm."
type: "string"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
RemoteAddrs:
- "node1:2377"
JoinToken: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
tags: ["Swarm"]
/swarm/leave:
post:
summary: "Leave a swarm"
operationId: "SwarmLeave"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "force"
description: |
Force leave swarm, even if this is the last manager or that it will
break the cluster.
in: "query"
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/update:
post:
summary: "Update a swarm"
operationId: "SwarmUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
$ref: "#/definitions/SwarmSpec"
- name: "version"
in: "query"
description: |
The version number of the swarm object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
- name: "rotateWorkerToken"
in: "query"
description: "Rotate the worker join token."
type: "boolean"
default: false
- name: "rotateManagerToken"
in: "query"
description: "Rotate the manager join token."
type: "boolean"
default: false
- name: "rotateManagerUnlockKey"
in: "query"
description: "Rotate the manager unlock key."
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/unlockkey:
get:
summary: "Get the unlock key"
operationId: "SwarmUnlockkey"
consumes:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "UnlockKeyResponse"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/unlock:
post:
summary: "Unlock a locked manager"
operationId: "SwarmUnlock"
consumes:
- "application/json"
produces:
- "application/json"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmUnlockRequest"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/services:
get:
summary: "List services"
operationId: "ServiceList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Service"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the services list.
Available filters:
- `id=<service id>`
- `label=<service label>`
- `mode=["replicated"|"global"]`
- `name=<service name>`
- name: "status"
in: "query"
type: "boolean"
description: |
Include service status, with count of running and desired tasks.
tags: ["Service"]
/services/create:
post:
summary: "Create a service"
operationId: "ServiceCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
type: "object"
title: "ServiceCreateResponse"
properties:
ID:
description: "The ID of the created service."
type: "string"
Warning:
description: "Optional warning message"
type: "string"
example:
ID: "ak7w3gjqoa3kuz8xcpnyy0pvl"
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
403:
description: "network is not eligible for services"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "name conflicts with an existing service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "web"
TaskTemplate:
ContainerSpec:
Image: "nginx:alpine"
Mounts:
-
ReadOnly: true
Source: "web-data"
Target: "/usr/share/nginx/html"
Type: "volume"
VolumeOptions:
DriverConfig: {}
Labels:
com.example.something: "something-value"
Hosts: ["10.10.10.10 host1", "ABCD:EF01:2345:6789:ABCD:EF01:2345:6789 host2"]
User: "33"
DNSConfig:
Nameservers: ["8.8.8.8"]
Search: ["example.org"]
Options: ["timeout:3"]
Secrets:
-
File:
Name: "www.example.org.key"
UID: "33"
GID: "33"
Mode: 384
SecretID: "fpjqlhnwb19zds35k8wn80lq9"
SecretName: "example_org_domain_key"
LogDriver:
Name: "json-file"
Options:
max-file: "3"
max-size: "10M"
Placement: {}
Resources:
Limits:
MemoryBytes: 104857600
Reservations: {}
RestartPolicy:
Condition: "on-failure"
Delay: 10000000000
MaxAttempts: 10
Mode:
Replicated:
Replicas: 4
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Ports:
-
Protocol: "tcp"
PublishedPort: 8080
TargetPort: 80
Labels:
foo: "bar"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}:
get:
summary: "Inspect a service"
operationId: "ServiceInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Service"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "insertDefaults"
in: "query"
description: "Fill empty fields with default values."
type: "boolean"
default: false
tags: ["Service"]
delete:
summary: "Delete a service"
operationId: "ServiceDelete"
responses:
200:
description: "no error"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
tags: ["Service"]
/services/{id}/update:
post:
summary: "Update a service"
operationId: "ServiceUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/ServiceUpdateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "top"
TaskTemplate:
ContainerSpec:
Image: "busybox"
Args:
- "top"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
- name: "version"
in: "query"
description: |
The version number of the service object being updated. This is
required to avoid conflicting writes.
This version number should be the value as currently set on the
service *before* the update. You can find the current version by
calling `GET /services/{id}`
required: true
type: "integer"
- name: "registryAuthFrom"
in: "query"
description: |
If the `X-Registry-Auth` header is not specified, this parameter
indicates where to find registry authorization credentials.
type: "string"
enum: ["spec", "previous-spec"]
default: "spec"
- name: "rollback"
in: "query"
description: |
Set to this parameter to `previous` to cause a server-side rollback
to the previous service spec. The supplied spec will be ignored in
this case.
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}/logs:
get:
summary: "Get service logs"
description: |
Get `stdout` and `stderr` logs from a service. See also
[`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ServiceLogs"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such service: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the service"
type: "string"
- name: "details"
in: "query"
description: "Show service context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Service"]
/tasks:
get:
summary: "List tasks"
operationId: "TaskList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Task"
example:
- ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
- ID: "1yljwbmlr8er2waf8orvqpwms"
Version:
Index: 30
CreatedAt: "2016-06-07T21:07:30.019104782Z"
UpdatedAt: "2016-06-07T21:07:30.231958098Z"
Name: "hopeful_cori"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:30.202183143Z"
State: "shutdown"
Message: "shutdown"
ContainerStatus:
ContainerID: "1cf8d63d18e79668b0004a4be4c6ee58cddfad2dae29506d8781581d0688a213"
DesiredState: "shutdown"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.5/16"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the tasks list.
Available filters:
- `desired-state=(running | shutdown | accepted)`
- `id=<task id>`
- `label=key` or `label="key=value"`
- `name=<task name>`
- `node=<node id or name>`
- `service=<service name>`
tags: ["Task"]
/tasks/{id}:
get:
summary: "Inspect a task"
operationId: "TaskInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Task"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID of the task"
required: true
type: "string"
tags: ["Task"]
/tasks/{id}/logs:
get:
summary: "Get task logs"
description: |
Get `stdout` and `stderr` logs from a task.
See also [`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
operationId: "TaskLogs"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such task: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID of the task"
type: "string"
- name: "details"
in: "query"
description: "Show task context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Task"]
/secrets:
get:
summary: "List secrets"
operationId: "SecretList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Secret"
example:
- ID: "blt1owaxmitz71s9v5zh81zun"
Version:
Index: 85
CreatedAt: "2017-07-20T13:55:28.678958722Z"
UpdatedAt: "2017-07-20T13:55:28.678958722Z"
Spec:
Name: "mysql-passwd"
Labels:
some.label: "some.value"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the secrets list.
Available filters:
- `id=<secret id>`
- `label=<key> or label=<key>=value`
- `name=<secret name>`
- `names=<secret name>`
tags: ["Secret"]
/secrets/create:
post:
summary: "Create a secret"
operationId: "SecretCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/SecretSpec"
- type: "object"
example:
Name: "app-key.crt"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
tags: ["Secret"]
/secrets/{id}:
get:
summary: "Inspect a secret"
operationId: "SecretInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Secret"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
delete:
summary: "Delete a secret"
operationId: "SecretDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
/secrets/{id}/update:
post:
summary: "Update a Secret"
operationId: "SecretUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such secret"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the secret"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/SecretSpec"
description: |
The spec of the secret to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[SecretInspect endpoint](#operation/SecretInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the secret object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Secret"]
/configs:
get:
summary: "List configs"
operationId: "ConfigList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Config"
example:
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "server.conf"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the configs list.
Available filters:
- `id=<config id>`
- `label=<key> or label=<key>=value`
- `name=<config name>`
- `names=<config name>`
tags: ["Config"]
/configs/create:
post:
summary: "Create a config"
operationId: "ConfigCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/ConfigSpec"
- type: "object"
example:
Name: "server.conf"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
tags: ["Config"]
/configs/{id}:
get:
summary: "Inspect a config"
operationId: "ConfigInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Config"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
delete:
summary: "Delete a config"
operationId: "ConfigDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
/configs/{id}/update:
post:
summary: "Update a Config"
operationId: "ConfigUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such config"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the config"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/ConfigSpec"
description: |
The spec of the config to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[ConfigInspect endpoint](#operation/ConfigInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the config object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Config"]
/distribution/{name}/json:
get:
summary: "Get image information from the registry"
description: |
Return image digest and platform information by contacting the registry.
operationId: "DistributionInspect"
produces:
- "application/json"
responses:
200:
description: "descriptor and platform information"
schema:
$ref: "#/definitions/DistributionInspect"
401:
description: "Failed authentication or no image found"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Distribution"]
/session:
post:
summary: "Initialize interactive session"
description: |
Start a new interactive session with a server. Session allows server to
call back to the client for advanced capabilities.
### Hijacking
This endpoint hijacks the HTTP connection to HTTP2 transport that allows
the client to expose gPRC services on that connection.
For example, the client sends this request to upgrade the connection:
```
POST /session HTTP/1.1
Upgrade: h2c
Connection: Upgrade
```
The Docker daemon responds with a `101 UPGRADED` response follow with
the raw stream:
```
HTTP/1.1 101 UPGRADED
Connection: Upgrade
Upgrade: h2c
```
operationId: "Session"
produces:
- "application/vnd.docker.raw-stream"
responses:
101:
description: "no error, hijacking successful"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Session"]
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | whoops; you forgot to update this one 😅
```suggestion
/volumes/{name}:
put:
``` | thaJeztah | 5,004 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | api/swagger.yaml | # A Swagger 2.0 (a.k.a. OpenAPI) definition of the Engine API.
#
# This is used for generating API documentation and the types used by the
# client/server. See api/README.md for more information.
#
# Some style notes:
# - This file is used by ReDoc, which allows GitHub Flavored Markdown in
# descriptions.
# - There is no maximum line length, for ease of editing and pretty diffs.
# - operationIds are in the format "NounVerb", with a singular noun.
swagger: "2.0"
schemes:
- "http"
- "https"
produces:
- "application/json"
- "text/plain"
consumes:
- "application/json"
- "text/plain"
basePath: "/v1.42"
info:
title: "Docker Engine API"
version: "1.42"
x-logo:
url: "https://docs.docker.com/images/logo-docker-main.png"
description: |
The Engine API is an HTTP API served by Docker Engine. It is the API the
Docker client uses to communicate with the Engine, so everything the Docker
client can do can be done with the API.
Most of the client's commands map directly to API endpoints (e.g. `docker ps`
is `GET /containers/json`). The notable exception is running containers,
which consists of several API calls.
# Errors
The API uses standard HTTP status codes to indicate the success or failure
of the API call. The body of the response will be JSON in the following
format:
```
{
"message": "page not found"
}
```
# Versioning
The API is usually changed in each release, so API calls are versioned to
ensure that clients don't break. To lock to a specific version of the API,
you prefix the URL with its version, for example, call `/v1.30/info` to use
the v1.30 version of the `/info` endpoint. If the API version specified in
the URL is not supported by the daemon, a HTTP `400 Bad Request` error message
is returned.
If you omit the version-prefix, the current version of the API (v1.42) is used.
For example, calling `/info` is the same as calling `/v1.42/info`. Using the
API without a version-prefix is deprecated and will be removed in a future release.
Engine releases in the near future should support this version of the API,
so your client will continue to work even if it is talking to a newer Engine.
The API uses an open schema model, which means server may add extra properties
to responses. Likewise, the server will ignore any extra query parameters and
request body properties. When you write clients, you need to ignore additional
properties in responses to ensure they do not break when talking to newer
daemons.
# Authentication
Authentication for registries is handled client side. The client has to send
authentication details to various endpoints that need to communicate with
registries, such as `POST /images/(name)/push`. These are sent as
`X-Registry-Auth` header as a [base64url encoded](https://tools.ietf.org/html/rfc4648#section-5)
(JSON) string with the following structure:
```
{
"username": "string",
"password": "string",
"email": "string",
"serveraddress": "string"
}
```
The `serveraddress` is a domain/IP without a protocol. Throughout this
structure, double quotes are required.
If you have already got an identity token from the [`/auth` endpoint](#operation/SystemAuth),
you can just pass this instead of credentials:
```
{
"identitytoken": "9cbaf023786cd7..."
}
```
# The tags on paths define the menu sections in the ReDoc documentation, so
# the usage of tags must make sense for that:
# - They should be singular, not plural.
# - There should not be too many tags, or the menu becomes unwieldy. For
# example, it is preferable to add a path to the "System" tag instead of
# creating a tag with a single path in it.
# - The order of tags in this list defines the order in the menu.
tags:
# Primary objects
- name: "Container"
x-displayName: "Containers"
description: |
Create and manage containers.
- name: "Image"
x-displayName: "Images"
- name: "Network"
x-displayName: "Networks"
description: |
Networks are user-defined networks that containers can be attached to.
See the [networking documentation](https://docs.docker.com/network/)
for more information.
- name: "Volume"
x-displayName: "Volumes"
description: |
Create and manage persistent storage that can be attached to containers.
- name: "Exec"
x-displayName: "Exec"
description: |
Run new commands inside running containers. Refer to the
[command-line reference](https://docs.docker.com/engine/reference/commandline/exec/)
for more information.
To exec a command in a container, you first need to create an exec instance,
then start it. These two API endpoints are wrapped up in a single command-line
command, `docker exec`.
# Swarm things
- name: "Swarm"
x-displayName: "Swarm"
description: |
Engines can be clustered together in a swarm. Refer to the
[swarm mode documentation](https://docs.docker.com/engine/swarm/)
for more information.
- name: "Node"
x-displayName: "Nodes"
description: |
Nodes are instances of the Engine participating in a swarm. Swarm mode
must be enabled for these endpoints to work.
- name: "Service"
x-displayName: "Services"
description: |
Services are the definitions of tasks to run on a swarm. Swarm mode must
be enabled for these endpoints to work.
- name: "Task"
x-displayName: "Tasks"
description: |
A task is a container running on a swarm. It is the atomic scheduling unit
of swarm. Swarm mode must be enabled for these endpoints to work.
- name: "Secret"
x-displayName: "Secrets"
description: |
Secrets are sensitive data that can be used by services. Swarm mode must
be enabled for these endpoints to work.
- name: "Config"
x-displayName: "Configs"
description: |
Configs are application configurations that can be used by services. Swarm
mode must be enabled for these endpoints to work.
# System things
- name: "Plugin"
x-displayName: "Plugins"
- name: "System"
x-displayName: "System"
definitions:
Port:
type: "object"
description: "An open port on a container"
required: [PrivatePort, Type]
properties:
IP:
type: "string"
format: "ip-address"
description: "Host IP address that the container's port is mapped to"
PrivatePort:
type: "integer"
format: "uint16"
x-nullable: false
description: "Port on the container"
PublicPort:
type: "integer"
format: "uint16"
description: "Port exposed on the host"
Type:
type: "string"
x-nullable: false
enum: ["tcp", "udp", "sctp"]
example:
PrivatePort: 8080
PublicPort: 80
Type: "tcp"
MountPoint:
type: "object"
description: |
MountPoint represents a mount point configuration inside the container.
This is used for reporting the mountpoints in use by a container.
properties:
Type:
description: |
The mount type:
- `bind` a mount of a file or directory from the host into the container.
- `volume` a docker volume with the given `Name`.
- `tmpfs` a `tmpfs`.
- `npipe` a named pipe from the host into the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
example: "volume"
Name:
description: |
Name is the name reference to the underlying data defined by `Source`
e.g., the volume name.
type: "string"
example: "myvolume"
Source:
description: |
Source location of the mount.
For volumes, this contains the storage location of the volume (within
`/var/lib/docker/volumes/`). For bind-mounts, and `npipe`, this contains
the source (host) part of the bind-mount. For `tmpfs` mount points, this
field is empty.
type: "string"
example: "/var/lib/docker/volumes/myvolume/_data"
Destination:
description: |
Destination is the path relative to the container root (`/`) where
the `Source` is mounted inside the container.
type: "string"
example: "/usr/share/nginx/html/"
Driver:
description: |
Driver is the volume driver used to create the volume (if it is a volume).
type: "string"
example: "local"
Mode:
description: |
Mode is a comma separated list of options supplied by the user when
creating the bind/volume mount.
The default is platform-specific (`"z"` on Linux, empty on Windows).
type: "string"
example: "z"
RW:
description: |
Whether the mount is mounted writable (read-write).
type: "boolean"
example: true
Propagation:
description: |
Propagation describes how mounts are propagated from the host into the
mount point, and vice-versa. Refer to the [Linux kernel documentation](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt)
for details. This field is not used on Windows.
type: "string"
example: ""
DeviceMapping:
type: "object"
description: "A device mapping between the host and container"
properties:
PathOnHost:
type: "string"
PathInContainer:
type: "string"
CgroupPermissions:
type: "string"
example:
PathOnHost: "/dev/deviceName"
PathInContainer: "/dev/deviceName"
CgroupPermissions: "mrw"
DeviceRequest:
type: "object"
description: "A request for devices to be sent to device drivers"
properties:
Driver:
type: "string"
example: "nvidia"
Count:
type: "integer"
example: -1
DeviceIDs:
type: "array"
items:
type: "string"
example:
- "0"
- "1"
- "GPU-fef8089b-4820-abfc-e83e-94318197576e"
Capabilities:
description: |
A list of capabilities; an OR list of AND lists of capabilities.
type: "array"
items:
type: "array"
items:
type: "string"
example:
# gpu AND nvidia AND compute
- ["gpu", "nvidia", "compute"]
Options:
description: |
Driver-specific options, specified as a key/value pairs. These options
are passed directly to the driver.
type: "object"
additionalProperties:
type: "string"
ThrottleDevice:
type: "object"
properties:
Path:
description: "Device path"
type: "string"
Rate:
description: "Rate"
type: "integer"
format: "int64"
minimum: 0
Mount:
type: "object"
properties:
Target:
description: "Container path."
type: "string"
Source:
description: "Mount source (e.g. a volume name, a host path)."
type: "string"
Type:
description: |
The mount type. Available types:
- `bind` Mounts a file or directory from the host into the container. Must exist prior to creating the container.
- `volume` Creates a volume with the given name and options (or uses a pre-existing volume with the same name and options). These are **not** removed when the container is removed.
- `tmpfs` Create a tmpfs with the given options. The mount source cannot be specified for tmpfs.
- `npipe` Mounts a named pipe from the host into the container. Must exist prior to creating the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
ReadOnly:
description: "Whether the mount should be read-only."
type: "boolean"
Consistency:
description: "The consistency requirement for the mount: `default`, `consistent`, `cached`, or `delegated`."
type: "string"
BindOptions:
description: "Optional configuration for the `bind` type."
type: "object"
properties:
Propagation:
description: "A propagation mode with the value `[r]private`, `[r]shared`, or `[r]slave`."
type: "string"
enum:
- "private"
- "rprivate"
- "shared"
- "rshared"
- "slave"
- "rslave"
NonRecursive:
description: "Disable recursive bind mount."
type: "boolean"
default: false
VolumeOptions:
description: "Optional configuration for the `volume` type."
type: "object"
properties:
NoCopy:
description: "Populate volume with data from the target."
type: "boolean"
default: false
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
DriverConfig:
description: "Map of driver specific options"
type: "object"
properties:
Name:
description: "Name of the driver to use to create the volume."
type: "string"
Options:
description: "key/value map of driver specific options."
type: "object"
additionalProperties:
type: "string"
TmpfsOptions:
description: "Optional configuration for the `tmpfs` type."
type: "object"
properties:
SizeBytes:
description: "The size for the tmpfs mount in bytes."
type: "integer"
format: "int64"
Mode:
description: "The permission mode for the tmpfs mount in an integer."
type: "integer"
RestartPolicy:
description: |
The behavior to apply when the container exits. The default is not to
restart.
An ever increasing delay (double the previous delay, starting at 100ms) is
added before each restart to prevent flooding the server.
type: "object"
properties:
Name:
type: "string"
description: |
- Empty string means not to restart
- `no` Do not automatically restart
- `always` Always restart
- `unless-stopped` Restart always except when the user has manually stopped the container
- `on-failure` Restart only when the container exit code is non-zero
enum:
- ""
- "no"
- "always"
- "unless-stopped"
- "on-failure"
MaximumRetryCount:
type: "integer"
description: |
If `on-failure` is used, the number of times to retry before giving up.
Resources:
description: "A container's resources (cgroups config, ulimits, etc)"
type: "object"
properties:
# Applicable to all platforms
CpuShares:
description: |
An integer value representing this container's relative CPU weight
versus other containers.
type: "integer"
Memory:
description: "Memory limit in bytes."
type: "integer"
format: "int64"
default: 0
# Applicable to UNIX platforms
CgroupParent:
description: |
Path to `cgroups` under which the container's `cgroup` is created. If
the path is not absolute, the path is considered to be relative to the
`cgroups` path of the init process. Cgroups are created if they do not
already exist.
type: "string"
BlkioWeight:
description: "Block IO weight (relative weight)."
type: "integer"
minimum: 0
maximum: 1000
BlkioWeightDevice:
description: |
Block IO weight (relative device weight) in the form:
```
[{"Path": "device_path", "Weight": weight}]
```
type: "array"
items:
type: "object"
properties:
Path:
type: "string"
Weight:
type: "integer"
minimum: 0
BlkioDeviceReadBps:
description: |
Limit read rate (bytes per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteBps:
description: |
Limit write rate (bytes per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceReadIOps:
description: |
Limit read rate (IO per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteIOps:
description: |
Limit write rate (IO per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
CpuPeriod:
description: "The length of a CPU period in microseconds."
type: "integer"
format: "int64"
CpuQuota:
description: |
Microseconds of CPU time that the container can get in a CPU period.
type: "integer"
format: "int64"
CpuRealtimePeriod:
description: |
The length of a CPU real-time period in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpuRealtimeRuntime:
description: |
The length of a CPU real-time runtime in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpusetCpus:
description: |
CPUs in which to allow execution (e.g., `0-3`, `0,1`).
type: "string"
example: "0-3"
CpusetMems:
description: |
Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only
effective on NUMA systems.
type: "string"
Devices:
description: "A list of devices to add to the container."
type: "array"
items:
$ref: "#/definitions/DeviceMapping"
DeviceCgroupRules:
description: "a list of cgroup rules to apply to the container"
type: "array"
items:
type: "string"
example: "c 13:* rwm"
DeviceRequests:
description: |
A list of requests for devices to be sent to device drivers.
type: "array"
items:
$ref: "#/definitions/DeviceRequest"
KernelMemoryTCP:
description: |
Hard limit for kernel TCP buffer memory (in bytes). Depending on the
OCI runtime in use, this option may be ignored. It is no longer supported
by the default (runc) runtime.
This field is omitted when empty.
type: "integer"
format: "int64"
MemoryReservation:
description: "Memory soft limit in bytes."
type: "integer"
format: "int64"
MemorySwap:
description: |
Total memory limit (memory + swap). Set as `-1` to enable unlimited
swap.
type: "integer"
format: "int64"
MemorySwappiness:
description: |
Tune a container's memory swappiness behavior. Accepts an integer
between 0 and 100.
type: "integer"
format: "int64"
minimum: 0
maximum: 100
NanoCpus:
description: "CPU quota in units of 10<sup>-9</sup> CPUs."
type: "integer"
format: "int64"
OomKillDisable:
description: "Disable OOM Killer for the container."
type: "boolean"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
PidsLimit:
description: |
Tune a container's PIDs limit. Set `0` or `-1` for unlimited, or `null`
to not change.
type: "integer"
format: "int64"
x-nullable: true
Ulimits:
description: |
A list of resource limits to set in the container. For example:
```
{"Name": "nofile", "Soft": 1024, "Hard": 2048}
```
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
# Applicable to Windows
CpuCount:
description: |
The number of usable CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
CpuPercent:
description: |
The usable percentage of the available CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
IOMaximumIOps:
description: "Maximum IOps for the container system drive (Windows only)"
type: "integer"
format: "int64"
IOMaximumBandwidth:
description: |
Maximum IO in bytes per second for the container system drive
(Windows only).
type: "integer"
format: "int64"
Limit:
description: |
An object describing a limit on resources which can be requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
Pids:
description: |
Limits the maximum number of PIDs in the container. Set `0` for unlimited.
type: "integer"
format: "int64"
default: 0
example: 100
ResourceObject:
description: |
An object describing the resources which can be advertised by a node and
requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
GenericResources:
$ref: "#/definitions/GenericResources"
GenericResources:
description: |
User-defined resources can be either Integer resources (e.g, `SSD=3`) or
String resources (e.g, `GPU=UUID1`).
type: "array"
items:
type: "object"
properties:
NamedResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "string"
DiscreteResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "integer"
format: "int64"
example:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
HealthConfig:
description: "A test to perform to check that the container is healthy."
type: "object"
properties:
Test:
description: |
The test to perform. Possible values are:
- `[]` inherit healthcheck from image or parent image
- `["NONE"]` disable healthcheck
- `["CMD", args...]` exec arguments directly
- `["CMD-SHELL", command]` run command with system's default shell
type: "array"
items:
type: "string"
Interval:
description: |
The time to wait between checks in nanoseconds. It should be 0 or at
least 1000000 (1 ms). 0 means inherit.
type: "integer"
Timeout:
description: |
The time to wait before considering the check to have hung. It should
be 0 or at least 1000000 (1 ms). 0 means inherit.
type: "integer"
Retries:
description: |
The number of consecutive failures needed to consider a container as
unhealthy. 0 means inherit.
type: "integer"
StartPeriod:
description: |
Start period for the container to initialize before starting
health-retries countdown in nanoseconds. It should be 0 or at least
1000000 (1 ms). 0 means inherit.
type: "integer"
Health:
description: |
Health stores information about the container's healthcheck results.
type: "object"
x-nullable: true
properties:
Status:
description: |
Status is one of `none`, `starting`, `healthy` or `unhealthy`
- "none" Indicates there is no healthcheck
- "starting" Starting indicates that the container is not yet ready
- "healthy" Healthy indicates that the container is running correctly
- "unhealthy" Unhealthy indicates that the container has a problem
type: "string"
enum:
- "none"
- "starting"
- "healthy"
- "unhealthy"
example: "healthy"
FailingStreak:
description: "FailingStreak is the number of consecutive failures"
type: "integer"
example: 0
Log:
type: "array"
description: |
Log contains the last few results (oldest first)
items:
$ref: "#/definitions/HealthcheckResult"
HealthcheckResult:
description: |
HealthcheckResult stores information about a single run of a healthcheck probe
type: "object"
x-nullable: true
properties:
Start:
description: |
Date and time at which this check started in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "date-time"
example: "2020-01-04T10:44:24.496525531Z"
End:
description: |
Date and time at which this check ended in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2020-01-04T10:45:21.364524523Z"
ExitCode:
description: |
ExitCode meanings:
- `0` healthy
- `1` unhealthy
- `2` reserved (considered unhealthy)
- other values: error running probe
type: "integer"
example: 0
Output:
description: "Output from last check"
type: "string"
HostConfig:
description: "Container configuration that depends on the host we are running on"
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
# Applicable to all platforms
Binds:
type: "array"
description: |
A list of volume bindings for this container. Each volume binding
is a string in one of these forms:
- `host-src:container-dest[:options]` to bind-mount a host path
into the container. Both `host-src`, and `container-dest` must
be an _absolute_ path.
- `volume-name:container-dest[:options]` to bind-mount a volume
managed by a volume driver into the container. `container-dest`
must be an _absolute_ path.
`options` is an optional, comma-delimited list of:
- `nocopy` disables automatic copying of data from the container
path to the volume. The `nocopy` flag only applies to named volumes.
- `[ro|rw]` mounts a volume read-only or read-write, respectively.
If omitted or set to `rw`, volumes are mounted read-write.
- `[z|Z]` applies SELinux labels to allow or deny multiple containers
to read and write to the same volume.
- `z`: a _shared_ content label is applied to the content. This
label indicates that multiple containers can share the volume
content, for both reading and writing.
- `Z`: a _private unshared_ label is applied to the content.
This label indicates that only the current container can use
a private volume. Labeling systems such as SELinux require
proper labels to be placed on volume content that is mounted
into a container. Without a label, the security system can
prevent a container's processes from using the content. By
default, the labels set by the host operating system are not
modified.
- `[[r]shared|[r]slave|[r]private]` specifies mount
[propagation behavior](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt).
This only applies to bind-mounted volumes, not internal volumes
or named volumes. Mount propagation requires the source mount
point (the location where the source directory is mounted in the
host operating system) to have the correct propagation properties.
For shared volumes, the source mount point must be set to `shared`.
For slave volumes, the mount must be set to either `shared` or
`slave`.
items:
type: "string"
ContainerIDFile:
type: "string"
description: "Path to a file where the container ID is written"
LogConfig:
type: "object"
description: "The logging configuration for this container"
properties:
Type:
type: "string"
enum:
- "json-file"
- "syslog"
- "journald"
- "gelf"
- "fluentd"
- "awslogs"
- "splunk"
- "etwlogs"
- "none"
Config:
type: "object"
additionalProperties:
type: "string"
NetworkMode:
type: "string"
description: |
Network mode to use for this container. Supported standard values
are: `bridge`, `host`, `none`, and `container:<name|id>`. Any
other value is taken as a custom network's name to which this
container should connect to.
PortBindings:
$ref: "#/definitions/PortMap"
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
AutoRemove:
type: "boolean"
description: |
Automatically remove the container when the container's process
exits. This has no effect if `RestartPolicy` is set.
VolumeDriver:
type: "string"
description: "Driver that this container uses to mount volumes."
VolumesFrom:
type: "array"
description: |
A list of volumes to inherit from another container, specified in
the form `<container name>[:<ro|rw>]`.
items:
type: "string"
Mounts:
description: |
Specification for mounts to be added to the container.
type: "array"
items:
$ref: "#/definitions/Mount"
# Applicable to UNIX platforms
CapAdd:
type: "array"
description: |
A list of kernel capabilities to add to the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CapDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CgroupnsMode:
type: "string"
enum:
- "private"
- "host"
description: |
cgroup namespace mode for the container. Possible values are:
- `"private"`: the container runs in its own private cgroup namespace
- `"host"`: use the host system's cgroup namespace
If not specified, the daemon default is used, which can either be `"private"`
or `"host"`, depending on daemon version, kernel support and configuration.
Dns:
type: "array"
description: "A list of DNS servers for the container to use."
items:
type: "string"
DnsOptions:
type: "array"
description: "A list of DNS options."
items:
type: "string"
DnsSearch:
type: "array"
description: "A list of DNS search domains."
items:
type: "string"
ExtraHosts:
type: "array"
description: |
A list of hostnames/IP mappings to add to the container's `/etc/hosts`
file. Specified in the form `["hostname:IP"]`.
items:
type: "string"
GroupAdd:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
IpcMode:
type: "string"
description: |
IPC sharing mode for the container. Possible values are:
- `"none"`: own private IPC namespace, with /dev/shm not mounted
- `"private"`: own private IPC namespace
- `"shareable"`: own private IPC namespace, with a possibility to share it with other containers
- `"container:<name|id>"`: join another (shareable) container's IPC namespace
- `"host"`: use the host system's IPC namespace
If not specified, daemon default is used, which can either be `"private"`
or `"shareable"`, depending on daemon version and configuration.
Cgroup:
type: "string"
description: "Cgroup to use for the container."
Links:
type: "array"
description: |
A list of links for the container in the form `container_name:alias`.
items:
type: "string"
OomScoreAdj:
type: "integer"
description: |
An integer value containing the score given to the container in
order to tune OOM killer preferences.
example: 500
PidMode:
type: "string"
description: |
Set the PID (Process) Namespace mode for the container. It can be
either:
- `"container:<name|id>"`: joins another container's PID namespace
- `"host"`: use the host's PID namespace inside the container
Privileged:
type: "boolean"
description: "Gives the container full access to the host."
PublishAllPorts:
type: "boolean"
description: |
Allocates an ephemeral host port for all of a container's
exposed ports.
Ports are de-allocated when the container stops and allocated when
the container starts. The allocated port might be changed when
restarting the container.
The port is selected from the ephemeral port range that depends on
the kernel. For example, on Linux the range is defined by
`/proc/sys/net/ipv4/ip_local_port_range`.
ReadonlyRootfs:
type: "boolean"
description: "Mount the container's root filesystem as read only."
SecurityOpt:
type: "array"
description: |
A list of string values to customize labels for MLS systems, such
as SELinux.
items:
type: "string"
StorageOpt:
type: "object"
description: |
Storage driver options for this container, in the form `{"size": "120G"}`.
additionalProperties:
type: "string"
Tmpfs:
type: "object"
description: |
A map of container directories which should be replaced by tmpfs
mounts, and their corresponding mount options. For example:
```
{ "/run": "rw,noexec,nosuid,size=65536k" }
```
additionalProperties:
type: "string"
UTSMode:
type: "string"
description: "UTS namespace to use for the container."
UsernsMode:
type: "string"
description: |
Sets the usernamespace mode for the container when usernamespace
remapping option is enabled.
ShmSize:
type: "integer"
description: |
Size of `/dev/shm` in bytes. If omitted, the system uses 64MB.
minimum: 0
Sysctls:
type: "object"
description: |
A list of kernel parameters (sysctls) to set in the container.
For example:
```
{"net.ipv4.ip_forward": "1"}
```
additionalProperties:
type: "string"
Runtime:
type: "string"
description: "Runtime to use with this container."
# Applicable to Windows
ConsoleSize:
type: "array"
description: |
Initial console size, as an `[height, width]` array. (Windows only)
minItems: 2
maxItems: 2
items:
type: "integer"
minimum: 0
Isolation:
type: "string"
description: |
Isolation technology of the container. (Windows only)
enum:
- "default"
- "process"
- "hyperv"
MaskedPaths:
type: "array"
description: |
The list of paths to be masked inside the container (this overrides
the default set of paths).
items:
type: "string"
ReadonlyPaths:
type: "array"
description: |
The list of paths to be set as read-only inside the container
(this overrides the default set of paths).
items:
type: "string"
ContainerConfig:
description: |
Configuration for a container that is portable between hosts.
When used as `ContainerConfig` field in an image, `ContainerConfig` is an
optional field containing the configuration of the container that was last
committed when creating the image.
Previous versions of Docker builder used this field to store build cache,
and it is not in active use anymore.
type: "object"
properties:
Hostname:
description: |
The hostname to use for the container, as a valid RFC 1123 hostname.
type: "string"
example: "439f4e91bd1d"
Domainname:
description: |
The domain name to use for the container.
type: "string"
User:
description: "The user that commands are run as inside the container."
type: "string"
AttachStdin:
description: "Whether to attach to `stdin`."
type: "boolean"
default: false
AttachStdout:
description: "Whether to attach to `stdout`."
type: "boolean"
default: true
AttachStderr:
description: "Whether to attach to `stderr`."
type: "boolean"
default: true
ExposedPorts:
description: |
An object mapping ports to an empty object in the form:
`{"<port>/<tcp|udp|sctp>": {}}`
type: "object"
x-nullable: true
additionalProperties:
type: "object"
enum:
- {}
default: {}
example: {
"80/tcp": {},
"443/tcp": {}
}
Tty:
description: |
Attach standard streams to a TTY, including `stdin` if it is not closed.
type: "boolean"
default: false
OpenStdin:
description: "Open `stdin`"
type: "boolean"
default: false
StdinOnce:
description: "Close `stdin` after one attached client disconnects"
type: "boolean"
default: false
Env:
description: |
A list of environment variables to set inside the container in the
form `["VAR=value", ...]`. A variable without `=` is removed from the
environment, rather than to have an empty value.
type: "array"
items:
type: "string"
example:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Cmd:
description: |
Command to run specified as a string or an array of strings.
type: "array"
items:
type: "string"
example: ["/bin/sh"]
Healthcheck:
$ref: "#/definitions/HealthConfig"
ArgsEscaped:
description: "Command is already escaped (Windows only)"
type: "boolean"
default: false
example: false
x-nullable: true
Image:
description: |
The name (or reference) of the image to use when creating the container,
or which was used when the container was created.
type: "string"
example: "example-image:1.0"
Volumes:
description: |
An object mapping mount point paths inside the container to empty
objects.
type: "object"
additionalProperties:
type: "object"
enum:
- {}
default: {}
WorkingDir:
description: "The working directory for commands to run in."
type: "string"
example: "/public/"
Entrypoint:
description: |
The entry point for the container as a string or an array of strings.
If the array consists of exactly one empty string (`[""]`) then the
entry point is reset to system default (i.e., the entry point used by
docker when there is no `ENTRYPOINT` instruction in the `Dockerfile`).
type: "array"
items:
type: "string"
example: []
NetworkDisabled:
description: "Disable networking for the container."
type: "boolean"
x-nullable: true
MacAddress:
description: "MAC address of the container."
type: "string"
x-nullable: true
OnBuild:
description: |
`ONBUILD` metadata that were defined in the image's `Dockerfile`.
type: "array"
x-nullable: true
items:
type: "string"
example: []
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
StopSignal:
description: |
Signal to stop a container as a string or unsigned integer.
type: "string"
example: "SIGTERM"
x-nullable: true
StopTimeout:
description: "Timeout to stop a container in seconds."
type: "integer"
default: 10
x-nullable: true
Shell:
description: |
Shell for when `RUN`, `CMD`, and `ENTRYPOINT` uses a shell.
type: "array"
x-nullable: true
items:
type: "string"
example: ["/bin/sh", "-c"]
NetworkingConfig:
description: |
NetworkingConfig represents the container's networking configuration for
each of its interfaces.
It is used for the networking configs specified in the `docker create`
and `docker network connect` commands.
type: "object"
properties:
EndpointsConfig:
description: |
A mapping of network name to endpoint configuration for that network.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
example:
# putting an example here, instead of using the example values from
# /definitions/EndpointSettings, because containers/create currently
# does not support attaching to multiple networks, so the example request
# would be confusing if it showed that multiple networks can be contained
# in the EndpointsConfig.
# TODO remove once we support multiple networks on container create (see https://github.com/moby/moby/blob/07e6b843594e061f82baa5fa23c2ff7d536c2a05/daemon/create.go#L323)
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
NetworkSettings:
description: "NetworkSettings exposes the network settings in the API"
type: "object"
properties:
Bridge:
description: Name of the network's bridge (for example, `docker0`).
type: "string"
example: "docker0"
SandboxID:
description: SandboxID uniquely represents a container's network stack.
type: "string"
example: "9d12daf2c33f5959c8bf90aa513e4f65b561738661003029ec84830cd503a0c3"
HairpinMode:
description: |
Indicates if hairpin NAT should be enabled on the virtual interface.
type: "boolean"
example: false
LinkLocalIPv6Address:
description: IPv6 unicast address using the link-local prefix.
type: "string"
example: "fe80::42:acff:fe11:1"
LinkLocalIPv6PrefixLen:
description: Prefix length of the IPv6 unicast address.
type: "integer"
example: "64"
Ports:
$ref: "#/definitions/PortMap"
SandboxKey:
description: SandboxKey identifies the sandbox
type: "string"
example: "/var/run/docker/netns/8ab54b426c38"
# TODO is SecondaryIPAddresses actually used?
SecondaryIPAddresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO is SecondaryIPv6Addresses actually used?
SecondaryIPv6Addresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO properties below are part of DefaultNetworkSettings, which is
# marked as deprecated since Docker 1.9 and to be removed in Docker v17.12
EndpointID:
description: |
EndpointID uniquely represents a service endpoint in a Sandbox.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.1"
GlobalIPv6Address:
description: |
Global IPv6 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 64
IPAddress:
description: |
IPv4 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address for this network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8:2::100"
MacAddress:
description: |
MAC address for the container on the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "02:42:ac:11:00:04"
Networks:
description: |
Information about all networks that the container is connected to.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Address:
description: Address represents an IPv4 or IPv6 IP address.
type: "object"
properties:
Addr:
description: IP address.
type: "string"
PrefixLen:
description: Mask length of the IP address.
type: "integer"
PortMap:
description: |
PortMap describes the mapping of container ports to host ports, using the
container's port-number and protocol as key in the format `<port>/<protocol>`,
for example, `80/udp`.
If a container's port is mapped for multiple protocols, separate entries
are added to the mapping table.
type: "object"
additionalProperties:
type: "array"
x-nullable: true
items:
$ref: "#/definitions/PortBinding"
example:
"443/tcp":
- HostIp: "127.0.0.1"
HostPort: "4443"
"80/tcp":
- HostIp: "0.0.0.0"
HostPort: "80"
- HostIp: "0.0.0.0"
HostPort: "8080"
"80/udp":
- HostIp: "0.0.0.0"
HostPort: "80"
"53/udp":
- HostIp: "0.0.0.0"
HostPort: "53"
"2377/tcp": null
PortBinding:
description: |
PortBinding represents a binding between a host IP address and a host
port.
type: "object"
properties:
HostIp:
description: "Host IP address that the container's port is mapped to."
type: "string"
example: "127.0.0.1"
HostPort:
description: "Host port number that the container's port is mapped to."
type: "string"
example: "4443"
GraphDriverData:
description: |
Information about the storage driver used to store the container's and
image's filesystem.
type: "object"
required: [Name, Data]
properties:
Name:
description: "Name of the storage driver."
type: "string"
x-nullable: false
example: "overlay2"
Data:
description: |
Low-level storage metadata, provided as key/value pairs.
This information is driver-specific, and depends on the storage-driver
in use, and should be used for informational purposes only.
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example: {
"MergedDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/merged",
"UpperDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/diff",
"WorkDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/work"
}
ImageInspect:
description: |
Information about an image in the local image cache.
type: "object"
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Parent:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
Comment:
description: |
Optional message that was set when committing or importing the image.
type: "string"
x-nullable: false
example: ""
Created:
description: |
Date and time at which the image was created, formatted in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
x-nullable: false
example: "2022-02-04T21:20:12.497794809Z"
Container:
description: |
The ID of the container that was used to create the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "65974bc86f1770ae4bff79f651ebdbce166ae9aada632ee3fa9af3a264911735"
ContainerConfig:
$ref: "#/definitions/ContainerConfig"
DockerVersion:
description: |
The version of Docker that was used to build the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "20.10.7"
Author:
description: |
Name of the author that was specified when committing the image, or as
specified through MAINTAINER (deprecated) in the Dockerfile.
type: "string"
x-nullable: false
example: ""
Config:
$ref: "#/definitions/ContainerConfig"
Architecture:
description: |
Hardware CPU architecture that the image runs on.
type: "string"
x-nullable: false
example: "arm"
Variant:
description: |
CPU architecture variant (presently ARM-only).
type: "string"
x-nullable: true
example: "v7"
Os:
description: |
Operating System the image is built to run on.
type: "string"
x-nullable: false
example: "linux"
OsVersion:
description: |
Operating System version the image is built to run on (especially
for Windows).
type: "string"
example: ""
x-nullable: true
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
GraphDriver:
$ref: "#/definitions/GraphDriverData"
RootFS:
description: |
Information about the image's RootFS, including the layer IDs.
type: "object"
required: [Type]
properties:
Type:
type: "string"
x-nullable: false
example: "layers"
Layers:
type: "array"
items:
type: "string"
example:
- "sha256:1834950e52ce4d5a88a1bbd131c537f4d0e56d10ff0dd69e66be3b7dfa9df7e6"
- "sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef"
Metadata:
description: |
Additional metadata of the image in the local cache. This information
is local to the daemon, and not part of the image itself.
type: "object"
properties:
LastTagTime:
description: |
Date and time at which the image was last tagged in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
This information is only available if the image was tagged locally,
and omitted otherwise.
type: "string"
format: "dateTime"
example: "2022-02-28T14:40:02.623929178Z"
x-nullable: true
ImageSummary:
type: "object"
required:
- Id
- ParentId
- RepoTags
- RepoDigests
- Created
- Size
- SharedSize
- VirtualSize
- Labels
- Containers
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
ParentId:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Created:
description: |
Date and time at which the image was created as a Unix timestamp
(number of seconds sinds EPOCH).
type: "integer"
x-nullable: false
example: "1644009612"
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
SharedSize:
description: |
Total size of image layers that are shared between this image and other
images.
This size is not calculated by default. `-1` indicates that the value
has not been set / calculated.
type: "integer"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
Labels:
description: "User-defined key/value metadata."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Containers:
description: |
Number of containers using this image. Includes both stopped and running
containers.
This size is not calculated by default, and depends on which API endpoint
is used. `-1` indicates that the value has not been set / calculated.
x-nullable: false
type: "integer"
example: 2
AuthConfig:
type: "object"
properties:
username:
type: "string"
password:
type: "string"
email:
type: "string"
serveraddress:
type: "string"
example:
username: "hannibal"
password: "xxxx"
serveraddress: "https://index.docker.io/v1/"
ProcessConfig:
type: "object"
properties:
privileged:
type: "boolean"
user:
type: "string"
tty:
type: "boolean"
entrypoint:
type: "string"
arguments:
type: "array"
items:
type: "string"
Volume:
type: "object"
required: [Name, Driver, Mountpoint, Labels, Scope, Options]
properties:
Name:
type: "string"
description: "Name of the volume."
x-nullable: false
example: "tardis"
Driver:
type: "string"
description: "Name of the volume driver used by the volume."
x-nullable: false
example: "custom"
Mountpoint:
type: "string"
description: "Mount path of the volume on the host."
x-nullable: false
example: "/var/lib/docker/volumes/tardis"
CreatedAt:
type: "string"
format: "dateTime"
description: "Date/Time the volume was created."
example: "2016-06-07T20:31:11.853781916Z"
Status:
type: "object"
description: |
Low-level details about the volume, provided by the volume driver.
Details are returned as a map with key/value pairs:
`{"key":"value","key2":"value2"}`.
The `Status` field is optional, and is omitted if the volume driver
does not support this feature.
additionalProperties:
type: "object"
example:
hello: "world"
Labels:
type: "object"
description: "User-defined key/value metadata."
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Scope:
type: "string"
description: |
The level at which the volume exists. Either `global` for cluster-wide,
or `local` for machine level.
default: "local"
x-nullable: false
enum: ["local", "global"]
example: "local"
Options:
type: "object"
description: |
The driver specific options used when creating the volume.
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
UsageData:
type: "object"
x-nullable: true
x-go-name: "UsageData"
required: [Size, RefCount]
description: |
Usage details about the volume. This information is used by the
`GET /system/df` endpoint, and omitted in other endpoints.
properties:
Size:
type: "integer"
default: -1
description: |
Amount of disk space used by the volume (in bytes). This information
is only available for volumes created with the `"local"` volume
driver. For volumes created with other volume drivers, this field
is set to `-1` ("not available")
x-nullable: false
RefCount:
type: "integer"
default: -1
description: |
The number of containers referencing this volume. This field
is set to `-1` if the reference-count is not available.
x-nullable: false
VolumeCreateOptions:
description: "Volume configuration"
type: "object"
title: "VolumeConfig"
x-go-name: "CreateOptions"
properties:
Name:
description: |
The new volume's name. If not specified, Docker generates a name.
type: "string"
x-nullable: false
example: "tardis"
Driver:
description: "Name of the volume driver to use."
type: "string"
default: "local"
x-nullable: false
example: "custom"
DriverOpts:
description: |
A mapping of driver options and values. These options are
passed directly to the driver and are driver specific.
type: "object"
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
VolumeListResponse:
type: "object"
title: "VolumeListResponse"
x-go-name: "ListResponse"
description: "Volume list response"
properties:
Volumes:
type: "array"
description: "List of volumes"
items:
$ref: "#/definitions/Volume"
Warnings:
type: "array"
description: |
Warnings that occurred when fetching the list of volumes.
items:
type: "string"
example: []
Network:
type: "object"
properties:
Name:
type: "string"
Id:
type: "string"
Created:
type: "string"
format: "dateTime"
Scope:
type: "string"
Driver:
type: "string"
EnableIPv6:
type: "boolean"
IPAM:
$ref: "#/definitions/IPAM"
Internal:
type: "boolean"
Attachable:
type: "boolean"
Ingress:
type: "boolean"
Containers:
type: "object"
additionalProperties:
$ref: "#/definitions/NetworkContainer"
Options:
type: "object"
additionalProperties:
type: "string"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
Name: "net01"
Id: "7d86d31b1478e7cca9ebed7e73aa0fdeec46c5ca29497431d3007d2d9e15ed99"
Created: "2016-10-19T04:33:30.360899459Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
IPAM:
Driver: "default"
Config:
- Subnet: "172.19.0.0/16"
Gateway: "172.19.0.1"
Options:
foo: "bar"
Internal: false
Attachable: false
Ingress: false
Containers:
19a4d5d687db25203351ed79d478946f861258f018fe384f229f2efa4b23513c:
Name: "test"
EndpointID: "628cadb8bcb92de107b2a1e516cbffe463e321f548feb37697cce00ad694f21a"
MacAddress: "02:42:ac:13:00:02"
IPv4Address: "172.19.0.2/16"
IPv6Address: ""
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
IPAM:
type: "object"
properties:
Driver:
description: "Name of the IPAM driver to use."
type: "string"
default: "default"
Config:
description: |
List of IPAM configuration options, specified as a map:
```
{"Subnet": <CIDR>, "IPRange": <CIDR>, "Gateway": <IP address>, "AuxAddress": <device_name:IP address>}
```
type: "array"
items:
$ref: "#/definitions/IPAMConfig"
Options:
description: "Driver-specific options, specified as a map."
type: "object"
additionalProperties:
type: "string"
IPAMConfig:
type: "object"
properties:
Subnet:
type: "string"
IPRange:
type: "string"
Gateway:
type: "string"
AuxiliaryAddresses:
type: "object"
additionalProperties:
type: "string"
NetworkContainer:
type: "object"
properties:
Name:
type: "string"
EndpointID:
type: "string"
MacAddress:
type: "string"
IPv4Address:
type: "string"
IPv6Address:
type: "string"
BuildInfo:
type: "object"
properties:
id:
type: "string"
stream:
type: "string"
error:
type: "string"
errorDetail:
$ref: "#/definitions/ErrorDetail"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
aux:
$ref: "#/definitions/ImageID"
BuildCache:
type: "object"
properties:
ID:
type: "string"
Parent:
type: "string"
Type:
type: "string"
Description:
type: "string"
InUse:
type: "boolean"
Shared:
type: "boolean"
Size:
description: |
Amount of disk space used by the build cache (in bytes).
type: "integer"
CreatedAt:
description: |
Date and time at which the build cache was created in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
LastUsedAt:
description: |
Date and time at which the build cache was last used in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
x-nullable: true
example: "2017-08-09T07:09:37.632105588Z"
UsageCount:
type: "integer"
ImageID:
type: "object"
description: "Image ID or Digest"
properties:
ID:
type: "string"
example:
ID: "sha256:85f05633ddc1c50679be2b16a0479ab6f7637f8884e0cfe0f4d20e1ebb3d6e7c"
CreateImageInfo:
type: "object"
properties:
id:
type: "string"
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
PushImageInfo:
type: "object"
properties:
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
ErrorDetail:
type: "object"
properties:
code:
type: "integer"
message:
type: "string"
ProgressDetail:
type: "object"
properties:
current:
type: "integer"
total:
type: "integer"
ErrorResponse:
description: "Represents an error."
type: "object"
required: ["message"]
properties:
message:
description: "The error message."
type: "string"
x-nullable: false
example:
message: "Something went wrong."
IdResponse:
description: "Response to an API call that returns just an Id"
type: "object"
required: ["Id"]
properties:
Id:
description: "The id of the newly created object."
type: "string"
x-nullable: false
EndpointSettings:
description: "Configuration for a network endpoint."
type: "object"
properties:
# Configurations
IPAMConfig:
$ref: "#/definitions/EndpointIPAMConfig"
Links:
type: "array"
items:
type: "string"
example:
- "container_1"
- "container_2"
Aliases:
type: "array"
items:
type: "string"
example:
- "server_x"
- "server_y"
# Operational data
NetworkID:
description: |
Unique ID of the network.
type: "string"
example: "08754567f1f40222263eab4102e1c733ae697e8e354aa9cd6e18d7402835292a"
EndpointID:
description: |
Unique ID for the service endpoint in a Sandbox.
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for this network.
type: "string"
example: "172.17.0.1"
IPAddress:
description: |
IPv4 address.
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address.
type: "string"
example: "2001:db8:2::100"
GlobalIPv6Address:
description: |
Global IPv6 address.
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
type: "integer"
format: "int64"
example: 64
MacAddress:
description: |
MAC address for the endpoint on this network.
type: "string"
example: "02:42:ac:11:00:04"
DriverOpts:
description: |
DriverOpts is a mapping of driver options and values. These options
are passed directly to the driver and are driver specific.
type: "object"
x-nullable: true
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
EndpointIPAMConfig:
description: |
EndpointIPAMConfig represents an endpoint's IPAM configuration.
type: "object"
x-nullable: true
properties:
IPv4Address:
type: "string"
example: "172.20.30.33"
IPv6Address:
type: "string"
example: "2001:db8:abcd::3033"
LinkLocalIPs:
type: "array"
items:
type: "string"
example:
- "169.254.34.68"
- "fe80::3468"
PluginMount:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Source, Destination, Type, Options]
properties:
Name:
type: "string"
x-nullable: false
example: "some-mount"
Description:
type: "string"
x-nullable: false
example: "This is a mount that's used by the plugin."
Settable:
type: "array"
items:
type: "string"
Source:
type: "string"
example: "/var/lib/docker/plugins/"
Destination:
type: "string"
x-nullable: false
example: "/mnt/state"
Type:
type: "string"
x-nullable: false
example: "bind"
Options:
type: "array"
items:
type: "string"
example:
- "rbind"
- "rw"
PluginDevice:
type: "object"
required: [Name, Description, Settable, Path]
x-nullable: false
properties:
Name:
type: "string"
x-nullable: false
Description:
type: "string"
x-nullable: false
Settable:
type: "array"
items:
type: "string"
Path:
type: "string"
example: "/dev/fuse"
PluginEnv:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
Description:
x-nullable: false
type: "string"
Settable:
type: "array"
items:
type: "string"
Value:
type: "string"
PluginInterfaceType:
type: "object"
x-nullable: false
required: [Prefix, Capability, Version]
properties:
Prefix:
type: "string"
x-nullable: false
Capability:
type: "string"
x-nullable: false
Version:
type: "string"
x-nullable: false
PluginPrivilege:
description: |
Describes a permission the user has to accept upon installing
the plugin.
type: "object"
x-go-name: "PluginPrivilege"
properties:
Name:
type: "string"
example: "network"
Description:
type: "string"
Value:
type: "array"
items:
type: "string"
example:
- "host"
Plugin:
description: "A plugin for the Engine API"
type: "object"
required: [Settings, Enabled, Config, Name]
properties:
Id:
type: "string"
example: "5724e2c8652da337ab2eedd19fc6fc0ec908e4bd907c7421bf6a8dfc70c4c078"
Name:
type: "string"
x-nullable: false
example: "tiborvass/sample-volume-plugin"
Enabled:
description:
True if the plugin is running. False if the plugin is not running,
only installed.
type: "boolean"
x-nullable: false
example: true
Settings:
description: "Settings that can be modified by users."
type: "object"
x-nullable: false
required: [Args, Devices, Env, Mounts]
properties:
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
type: "string"
example:
- "DEBUG=0"
Args:
type: "array"
items:
type: "string"
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PluginReference:
description: "plugin remote reference used to push/pull the plugin"
type: "string"
x-nullable: false
example: "localhost:5000/tiborvass/sample-volume-plugin:latest"
Config:
description: "The config of a plugin."
type: "object"
x-nullable: false
required:
- Description
- Documentation
- Interface
- Entrypoint
- WorkDir
- Network
- Linux
- PidHost
- PropagatedMount
- IpcHost
- Mounts
- Env
- Args
properties:
DockerVersion:
description: "Docker Version used to create the plugin"
type: "string"
x-nullable: false
example: "17.06.0-ce"
Description:
type: "string"
x-nullable: false
example: "A sample volume plugin for Docker"
Documentation:
type: "string"
x-nullable: false
example: "https://docs.docker.com/engine/extend/plugins/"
Interface:
description: "The interface between Docker and the plugin"
x-nullable: false
type: "object"
required: [Types, Socket]
properties:
Types:
type: "array"
items:
$ref: "#/definitions/PluginInterfaceType"
example:
- "docker.volumedriver/1.0"
Socket:
type: "string"
x-nullable: false
example: "plugins.sock"
ProtocolScheme:
type: "string"
example: "some.protocol/v1.0"
description: "Protocol to use for clients connecting to the plugin."
enum:
- ""
- "moby.plugins.http/v1"
Entrypoint:
type: "array"
items:
type: "string"
example:
- "/usr/bin/sample-volume-plugin"
- "/data"
WorkDir:
type: "string"
x-nullable: false
example: "/bin/"
User:
type: "object"
x-nullable: false
properties:
UID:
type: "integer"
format: "uint32"
example: 1000
GID:
type: "integer"
format: "uint32"
example: 1000
Network:
type: "object"
x-nullable: false
required: [Type]
properties:
Type:
x-nullable: false
type: "string"
example: "host"
Linux:
type: "object"
x-nullable: false
required: [Capabilities, AllowAllDevices, Devices]
properties:
Capabilities:
type: "array"
items:
type: "string"
example:
- "CAP_SYS_ADMIN"
- "CAP_SYSLOG"
AllowAllDevices:
type: "boolean"
x-nullable: false
example: false
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PropagatedMount:
type: "string"
x-nullable: false
example: "/mnt/volumes"
IpcHost:
type: "boolean"
x-nullable: false
example: false
PidHost:
type: "boolean"
x-nullable: false
example: false
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
$ref: "#/definitions/PluginEnv"
example:
- Name: "DEBUG"
Description: "If set, prints debug messages"
Settable: null
Value: "0"
Args:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
example: "args"
Description:
x-nullable: false
type: "string"
example: "command line arguments"
Settable:
type: "array"
items:
type: "string"
Value:
type: "array"
items:
type: "string"
rootfs:
type: "object"
properties:
type:
type: "string"
example: "layers"
diff_ids:
type: "array"
items:
type: "string"
example:
- "sha256:675532206fbf3030b8458f88d6e26d4eb1577688a25efec97154c94e8b6b4887"
- "sha256:e216a057b1cb1efc11f8a268f37ef62083e70b1b38323ba252e25ac88904a7e8"
ObjectVersion:
description: |
The version number of the object such as node, service, etc. This is needed
to avoid conflicting writes. The client must send the version number along
with the modified specification when updating these objects.
This approach ensures safe concurrency and determinism in that the change
on the object may not be applied if the version number has changed from the
last read. In other words, if two update requests specify the same base
version, only one of the requests can succeed. As a result, two separate
update requests that happen at the same time will not unintentionally
overwrite each other.
type: "object"
properties:
Index:
type: "integer"
format: "uint64"
example: 373531
NodeSpec:
type: "object"
properties:
Name:
description: "Name for the node."
type: "string"
example: "my-node"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Role:
description: "Role of the node."
type: "string"
enum:
- "worker"
- "manager"
example: "manager"
Availability:
description: "Availability of the node."
type: "string"
enum:
- "active"
- "pause"
- "drain"
example: "active"
example:
Availability: "active"
Name: "node-name"
Role: "manager"
Labels:
foo: "bar"
Node:
type: "object"
properties:
ID:
type: "string"
example: "24ifsmvkjbyhk"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the node was added to the swarm in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the node was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/NodeSpec"
Description:
$ref: "#/definitions/NodeDescription"
Status:
$ref: "#/definitions/NodeStatus"
ManagerStatus:
$ref: "#/definitions/ManagerStatus"
NodeDescription:
description: |
NodeDescription encapsulates the properties of the Node as reported by the
agent.
type: "object"
properties:
Hostname:
type: "string"
example: "bf3067039e47"
Platform:
$ref: "#/definitions/Platform"
Resources:
$ref: "#/definitions/ResourceObject"
Engine:
$ref: "#/definitions/EngineDescription"
TLSInfo:
$ref: "#/definitions/TLSInfo"
Platform:
description: |
Platform represents the platform (Arch/OS).
type: "object"
properties:
Architecture:
description: |
Architecture represents the hardware architecture (for example,
`x86_64`).
type: "string"
example: "x86_64"
OS:
description: |
OS represents the Operating System (for example, `linux` or `windows`).
type: "string"
example: "linux"
EngineDescription:
description: "EngineDescription provides information about an engine."
type: "object"
properties:
EngineVersion:
type: "string"
example: "17.06.0"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
foo: "bar"
Plugins:
type: "array"
items:
type: "object"
properties:
Type:
type: "string"
Name:
type: "string"
example:
- Type: "Log"
Name: "awslogs"
- Type: "Log"
Name: "fluentd"
- Type: "Log"
Name: "gcplogs"
- Type: "Log"
Name: "gelf"
- Type: "Log"
Name: "journald"
- Type: "Log"
Name: "json-file"
- Type: "Log"
Name: "logentries"
- Type: "Log"
Name: "splunk"
- Type: "Log"
Name: "syslog"
- Type: "Network"
Name: "bridge"
- Type: "Network"
Name: "host"
- Type: "Network"
Name: "ipvlan"
- Type: "Network"
Name: "macvlan"
- Type: "Network"
Name: "null"
- Type: "Network"
Name: "overlay"
- Type: "Volume"
Name: "local"
- Type: "Volume"
Name: "localhost:5000/vieux/sshfs:latest"
- Type: "Volume"
Name: "vieux/sshfs:latest"
TLSInfo:
description: |
Information about the issuer of leaf TLS certificates and the trusted root
CA certificate.
type: "object"
properties:
TrustRoot:
description: |
The root CA certificate(s) that are used to validate leaf TLS
certificates.
type: "string"
CertIssuerSubject:
description:
The base64-url-safe-encoded raw subject bytes of the issuer.
type: "string"
CertIssuerPublicKey:
description: |
The base64-url-safe-encoded raw public key bytes of the issuer.
type: "string"
example:
TrustRoot: |
-----BEGIN CERTIFICATE-----
MIIBajCCARCgAwIBAgIUbYqrLSOSQHoxD8CwG6Bi2PJi9c8wCgYIKoZIzj0EAwIw
EzERMA8GA1UEAxMIc3dhcm0tY2EwHhcNMTcwNDI0MjE0MzAwWhcNMzcwNDE5MjE0
MzAwWjATMREwDwYDVQQDEwhzd2FybS1jYTBZMBMGByqGSM49AgEGCCqGSM49AwEH
A0IABJk/VyMPYdaqDXJb/VXh5n/1Yuv7iNrxV3Qb3l06XD46seovcDWs3IZNV1lf
3Skyr0ofcchipoiHkXBODojJydSjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMB
Af8EBTADAQH/MB0GA1UdDgQWBBRUXxuRcnFjDfR/RIAUQab8ZV/n4jAKBggqhkjO
PQQDAgNIADBFAiAy+JTe6Uc3KyLCMiqGl2GyWGQqQDEcO3/YG36x7om65AIhAJvz
pxv6zFeVEkAEEkqIYi0omA9+CjanB/6Bz4n1uw8H
-----END CERTIFICATE-----
CertIssuerSubject: "MBMxETAPBgNVBAMTCHN3YXJtLWNh"
CertIssuerPublicKey: "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEmT9XIw9h1qoNclv9VeHmf/Vi6/uI2vFXdBveXTpcPjqx6i9wNazchk1XWV/dKTKvSh9xyGKmiIeRcE4OiMnJ1A=="
NodeStatus:
description: |
NodeStatus represents the status of a node.
It provides the current status of the node, as seen by the manager.
type: "object"
properties:
State:
$ref: "#/definitions/NodeState"
Message:
type: "string"
example: ""
Addr:
description: "IP address of the node."
type: "string"
example: "172.17.0.2"
NodeState:
description: "NodeState represents the state of a node."
type: "string"
enum:
- "unknown"
- "down"
- "ready"
- "disconnected"
example: "ready"
ManagerStatus:
description: |
ManagerStatus represents the status of a manager.
It provides the current status of a node's manager component, if the node
is a manager.
x-nullable: true
type: "object"
properties:
Leader:
type: "boolean"
default: false
example: true
Reachability:
$ref: "#/definitions/Reachability"
Addr:
description: |
The IP address and port at which the manager is reachable.
type: "string"
example: "10.0.0.46:2377"
Reachability:
description: "Reachability represents the reachability of a node."
type: "string"
enum:
- "unknown"
- "unreachable"
- "reachable"
example: "reachable"
SwarmSpec:
description: "User modifiable swarm configuration."
type: "object"
properties:
Name:
description: "Name of the swarm."
type: "string"
example: "default"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.corp.type: "production"
com.example.corp.department: "engineering"
Orchestration:
description: "Orchestration configuration."
type: "object"
x-nullable: true
properties:
TaskHistoryRetentionLimit:
description: |
The number of historic tasks to keep per instance or node. If
negative, never remove completed or failed tasks.
type: "integer"
format: "int64"
example: 10
Raft:
description: "Raft configuration."
type: "object"
properties:
SnapshotInterval:
description: "The number of log entries between snapshots."
type: "integer"
format: "uint64"
example: 10000
KeepOldSnapshots:
description: |
The number of snapshots to keep beyond the current snapshot.
type: "integer"
format: "uint64"
LogEntriesForSlowFollowers:
description: |
The number of log entries to keep around to sync up slow followers
after a snapshot is created.
type: "integer"
format: "uint64"
example: 500
ElectionTick:
description: |
The number of ticks that a follower will wait for a message from
the leader before becoming a candidate and starting an election.
`ElectionTick` must be greater than `HeartbeatTick`.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 3
HeartbeatTick:
description: |
The number of ticks between heartbeats. Every HeartbeatTick ticks,
the leader will send a heartbeat to the followers.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 1
Dispatcher:
description: "Dispatcher configuration."
type: "object"
x-nullable: true
properties:
HeartbeatPeriod:
description: |
The delay for an agent to send a heartbeat to the dispatcher.
type: "integer"
format: "int64"
example: 5000000000
CAConfig:
description: "CA configuration."
type: "object"
x-nullable: true
properties:
NodeCertExpiry:
description: "The duration node certificates are issued for."
type: "integer"
format: "int64"
example: 7776000000000000
ExternalCAs:
description: |
Configuration for forwarding signing requests to an external
certificate authority.
type: "array"
items:
type: "object"
properties:
Protocol:
description: |
Protocol for communication with the external CA (currently
only `cfssl` is supported).
type: "string"
enum:
- "cfssl"
default: "cfssl"
URL:
description: |
URL where certificate signing requests should be sent.
type: "string"
Options:
description: |
An object with key/value pairs that are interpreted as
protocol-specific options for the external CA driver.
type: "object"
additionalProperties:
type: "string"
CACert:
description: |
The root CA certificate (in PEM format) this external CA uses
to issue TLS certificates (assumed to be to the current swarm
root CA certificate if not provided).
type: "string"
SigningCACert:
description: |
The desired signing CA certificate for all swarm node TLS leaf
certificates, in PEM format.
type: "string"
SigningCAKey:
description: |
The desired signing CA key for all swarm node TLS leaf certificates,
in PEM format.
type: "string"
ForceRotate:
description: |
An integer whose purpose is to force swarm to generate a new
signing CA certificate and key, if none have been specified in
`SigningCACert` and `SigningCAKey`
format: "uint64"
type: "integer"
EncryptionConfig:
description: "Parameters related to encryption-at-rest."
type: "object"
properties:
AutoLockManagers:
description: |
If set, generate a key and use it to lock data stored on the
managers.
type: "boolean"
example: false
TaskDefaults:
description: "Defaults for creating tasks in this cluster."
type: "object"
properties:
LogDriver:
description: |
The log driver to use for tasks created in the orchestrator if
unspecified by a service.
Updating this value only affects new tasks. Existing tasks continue
to use their previously configured log driver until recreated.
type: "object"
properties:
Name:
description: |
The log driver to use as a default for new tasks.
type: "string"
example: "json-file"
Options:
description: |
Driver-specific options for the selectd log driver, specified
as key/value pairs.
type: "object"
additionalProperties:
type: "string"
example:
"max-file": "10"
"max-size": "100m"
# The Swarm information for `GET /info`. It is the same as `GET /swarm`, but
# without `JoinTokens`.
ClusterInfo:
description: |
ClusterInfo represents information about the swarm as is returned by the
"/info" endpoint. Join-tokens are not included.
x-nullable: true
type: "object"
properties:
ID:
description: "The ID of the swarm."
type: "string"
example: "abajmipo7b4xz5ip2nrla6b11"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the swarm was initialised in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the swarm was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/SwarmSpec"
TLSInfo:
$ref: "#/definitions/TLSInfo"
RootRotationInProgress:
description: |
Whether there is currently a root CA rotation in progress for the swarm
type: "boolean"
example: false
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
If no port is set or is set to 0, the default port (4789) is used.
type: "integer"
format: "uint32"
default: 4789
example: 4789
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global scope
networks.
type: "array"
items:
type: "string"
format: "CIDR"
example: ["10.10.0.0/16", "20.20.0.0/16"]
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created from the
default subnet pool.
type: "integer"
format: "uint32"
maximum: 29
default: 24
example: 24
JoinTokens:
description: |
JoinTokens contains the tokens workers and managers need to join the swarm.
type: "object"
properties:
Worker:
description: |
The token workers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx"
Manager:
description: |
The token managers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
Swarm:
type: "object"
allOf:
- $ref: "#/definitions/ClusterInfo"
- type: "object"
properties:
JoinTokens:
$ref: "#/definitions/JoinTokens"
TaskSpec:
description: "User modifiable task configuration."
type: "object"
properties:
PluginSpec:
type: "object"
description: |
Plugin spec for the service. *(Experimental release only.)*
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Name:
description: "The name or 'alias' to use for the plugin."
type: "string"
Remote:
description: "The plugin image reference to use."
type: "string"
Disabled:
description: "Disable the plugin once scheduled."
type: "boolean"
PluginPrivilege:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
ContainerSpec:
type: "object"
description: |
Container spec for the service.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Image:
description: "The image name to use for the container"
type: "string"
Labels:
description: "User-defined key/value data."
type: "object"
additionalProperties:
type: "string"
Command:
description: "The command to be run in the image."
type: "array"
items:
type: "string"
Args:
description: "Arguments to the command."
type: "array"
items:
type: "string"
Hostname:
description: |
The hostname to use for the container, as a valid
[RFC 1123](https://tools.ietf.org/html/rfc1123) hostname.
type: "string"
Env:
description: |
A list of environment variables in the form `VAR=value`.
type: "array"
items:
type: "string"
Dir:
description: "The working directory for commands to run in."
type: "string"
User:
description: "The user inside the container."
type: "string"
Groups:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
Privileges:
type: "object"
description: "Security options for the container"
properties:
CredentialSpec:
type: "object"
description: "CredentialSpec for managed service account (Windows only)"
properties:
Config:
type: "string"
example: "0bt9dmxjvjiqermk6xrop3ekq"
description: |
Load credential spec from a Swarm Config with the given ID.
The specified config must also be present in the Configs
field with the Runtime property set.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
File:
type: "string"
example: "spec.json"
description: |
Load credential spec from this file. The file is read by
the daemon, and must be present in the `CredentialSpecs`
subdirectory in the docker data directory, which defaults
to `C:\ProgramData\Docker\` on Windows.
For example, specifying `spec.json` loads
`C:\ProgramData\Docker\CredentialSpecs\spec.json`.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
Registry:
type: "string"
description: |
Load credential spec from this value in the Windows
registry. The specified registry value must be located in:
`HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\Containers\CredentialSpecs`
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
SELinuxContext:
type: "object"
description: "SELinux labels of the container"
properties:
Disable:
type: "boolean"
description: "Disable SELinux"
User:
type: "string"
description: "SELinux user label"
Role:
type: "string"
description: "SELinux role label"
Type:
type: "string"
description: "SELinux type label"
Level:
type: "string"
description: "SELinux level label"
TTY:
description: "Whether a pseudo-TTY should be allocated."
type: "boolean"
OpenStdin:
description: "Open `stdin`"
type: "boolean"
ReadOnly:
description: "Mount the container's root filesystem as read only."
type: "boolean"
Mounts:
description: |
Specification for mounts to be added to containers created as part
of the service.
type: "array"
items:
$ref: "#/definitions/Mount"
StopSignal:
description: "Signal to stop the container."
type: "string"
StopGracePeriod:
description: |
Amount of time to wait for the container to terminate before
forcefully killing it.
type: "integer"
format: "int64"
HealthCheck:
$ref: "#/definitions/HealthConfig"
Hosts:
type: "array"
description: |
A list of hostname/IP mappings to add to the container's `hosts`
file. The format of extra hosts is specified in the
[hosts(5)](http://man7.org/linux/man-pages/man5/hosts.5.html)
man page:
IP_address canonical_hostname [aliases...]
items:
type: "string"
DNSConfig:
description: |
Specification for DNS related configurations in resolver configuration
file (`resolv.conf`).
type: "object"
properties:
Nameservers:
description: "The IP addresses of the name servers."
type: "array"
items:
type: "string"
Search:
description: "A search list for host-name lookup."
type: "array"
items:
type: "string"
Options:
description: |
A list of internal resolver variables to be modified (e.g.,
`debug`, `ndots:3`, etc.).
type: "array"
items:
type: "string"
Secrets:
description: |
Secrets contains references to zero or more secrets that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
SecretID:
description: |
SecretID represents the ID of the specific secret that we're
referencing.
type: "string"
SecretName:
description: |
SecretName is the name of the secret that this references,
but this is just provided for lookup/display purposes. The
secret in the reference will be identified by its ID.
type: "string"
Configs:
description: |
Configs contains references to zero or more configs that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually exclusive
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
Runtime:
description: |
Runtime represents a target that is not mounted into the
container but is used by the task
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually
> exclusive
type: "object"
ConfigID:
description: |
ConfigID represents the ID of the specific config that we're
referencing.
type: "string"
ConfigName:
description: |
ConfigName is the name of the config that this references,
but this is just provided for lookup/display purposes. The
config in the reference will be identified by its ID.
type: "string"
Isolation:
type: "string"
description: |
Isolation technology of the containers running the service.
(Windows only)
enum:
- "default"
- "process"
- "hyperv"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
Sysctls:
description: |
Set kernel namedspaced parameters (sysctls) in the container.
The Sysctls option on services accepts the same sysctls as the
are supported on containers. Note that while the same sysctls are
supported, no guarantees or checks are made about their
suitability for a clustered environment, and it's up to the user
to determine whether a given sysctl will work properly in a
Service.
type: "object"
additionalProperties:
type: "string"
# This option is not used by Windows containers
CapabilityAdd:
type: "array"
description: |
A list of kernel capabilities to add to the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
- "CAP_SYS_ADMIN"
- "CAP_SYS_CHROOT"
- "CAP_SYSLOG"
CapabilityDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
Ulimits:
description: |
A list of resource limits to set in the container. For example: `{"Name": "nofile", "Soft": 1024, "Hard": 2048}`"
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
NetworkAttachmentSpec:
description: |
Read-only spec type for non-swarm containers attached to swarm overlay
networks.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
type: "object"
properties:
ContainerID:
description: "ID of the container represented by this task"
type: "string"
Resources:
description: |
Resource requirements which apply to each individual container created
as part of the service.
type: "object"
properties:
Limits:
description: "Define resources limits."
$ref: "#/definitions/Limit"
Reservation:
description: "Define resources reservation."
$ref: "#/definitions/ResourceObject"
RestartPolicy:
description: |
Specification for the restart policy which applies to containers
created as part of this service.
type: "object"
properties:
Condition:
description: "Condition for restart."
type: "string"
enum:
- "none"
- "on-failure"
- "any"
Delay:
description: "Delay between restart attempts."
type: "integer"
format: "int64"
MaxAttempts:
description: |
Maximum attempts to restart a given container before giving up
(default value is 0, which is ignored).
type: "integer"
format: "int64"
default: 0
Window:
description: |
Windows is the time window used to evaluate the restart policy
(default value is 0, which is unbounded).
type: "integer"
format: "int64"
default: 0
Placement:
type: "object"
properties:
Constraints:
description: |
An array of constraint expressions to limit the set of nodes where
a task can be scheduled. Constraint expressions can either use a
_match_ (`==`) or _exclude_ (`!=`) rule. Multiple constraints find
nodes that satisfy every expression (AND match). Constraints can
match node or Docker Engine labels as follows:
node attribute | matches | example
---------------------|--------------------------------|-----------------------------------------------
`node.id` | Node ID | `node.id==2ivku8v2gvtg4`
`node.hostname` | Node hostname | `node.hostname!=node-2`
`node.role` | Node role (`manager`/`worker`) | `node.role==manager`
`node.platform.os` | Node operating system | `node.platform.os==windows`
`node.platform.arch` | Node architecture | `node.platform.arch==x86_64`
`node.labels` | User-defined node labels | `node.labels.security==high`
`engine.labels` | Docker Engine's labels | `engine.labels.operatingsystem==ubuntu-14.04`
`engine.labels` apply to Docker Engine labels like operating system,
drivers, etc. Swarm administrators add `node.labels` for operational
purposes by using the [`node update endpoint`](#operation/NodeUpdate).
type: "array"
items:
type: "string"
example:
- "node.hostname!=node3.corp.example.com"
- "node.role!=manager"
- "node.labels.type==production"
- "node.platform.os==linux"
- "node.platform.arch==x86_64"
Preferences:
description: |
Preferences provide a way to make the scheduler aware of factors
such as topology. They are provided in order from highest to
lowest precedence.
type: "array"
items:
type: "object"
properties:
Spread:
type: "object"
properties:
SpreadDescriptor:
description: |
label descriptor, such as `engine.labels.az`.
type: "string"
example:
- Spread:
SpreadDescriptor: "node.labels.datacenter"
- Spread:
SpreadDescriptor: "node.labels.rack"
MaxReplicas:
description: |
Maximum number of replicas for per node (default value is 0, which
is unlimited)
type: "integer"
format: "int64"
default: 0
Platforms:
description: |
Platforms stores all the platforms that the service's image can
run on. This field is used in the platform filter for scheduling.
If empty, then the platform filter is off, meaning there are no
scheduling restrictions.
type: "array"
items:
$ref: "#/definitions/Platform"
ForceUpdate:
description: |
A counter that triggers an update even if no relevant parameters have
been changed.
type: "integer"
Runtime:
description: |
Runtime is the type of runtime specified for the task executor.
type: "string"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
LogDriver:
description: |
Specifies the log driver to use for tasks created from this spec. If
not present, the default one for the swarm will be used, finally
falling back to the engine default if not specified.
type: "object"
properties:
Name:
type: "string"
Options:
type: "object"
additionalProperties:
type: "string"
TaskState:
type: "string"
enum:
- "new"
- "allocated"
- "pending"
- "assigned"
- "accepted"
- "preparing"
- "ready"
- "starting"
- "running"
- "complete"
- "shutdown"
- "failed"
- "rejected"
- "remove"
- "orphaned"
Task:
type: "object"
properties:
ID:
description: "The ID of the task."
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Name:
description: "Name of the task."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Spec:
$ref: "#/definitions/TaskSpec"
ServiceID:
description: "The ID of the service this task is part of."
type: "string"
Slot:
type: "integer"
NodeID:
description: "The ID of the node that this task is on."
type: "string"
AssignedGenericResources:
$ref: "#/definitions/GenericResources"
Status:
type: "object"
properties:
Timestamp:
type: "string"
format: "dateTime"
State:
$ref: "#/definitions/TaskState"
Message:
type: "string"
Err:
type: "string"
ContainerStatus:
type: "object"
properties:
ContainerID:
type: "string"
PID:
type: "integer"
ExitCode:
type: "integer"
DesiredState:
$ref: "#/definitions/TaskState"
JobIteration:
description: |
If the Service this Task belongs to is a job-mode service, contains
the JobIteration of the Service this Task was created for. Absent if
the Task was created for a Replicated or Global Service.
$ref: "#/definitions/ObjectVersion"
example:
ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
AssignedGenericResources:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
ServiceSpec:
description: "User modifiable configuration for a service."
type: object
properties:
Name:
description: "Name of the service."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
TaskTemplate:
$ref: "#/definitions/TaskSpec"
Mode:
description: "Scheduling mode for the service."
type: "object"
properties:
Replicated:
type: "object"
properties:
Replicas:
type: "integer"
format: "int64"
Global:
type: "object"
ReplicatedJob:
description: |
The mode used for services with a finite number of tasks that run
to a completed state.
type: "object"
properties:
MaxConcurrent:
description: |
The maximum number of replicas to run simultaneously.
type: "integer"
format: "int64"
default: 1
TotalCompletions:
description: |
The total number of replicas desired to reach the Completed
state. If unset, will default to the value of `MaxConcurrent`
type: "integer"
format: "int64"
GlobalJob:
description: |
The mode used for services which run a task to the completed state
on each valid node.
type: "object"
UpdateConfig:
description: "Specification for the update strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be updated in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: "Amount of time between updates, in nanoseconds."
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an updated task fails to run, or stops running
during the update.
type: "string"
enum:
- "continue"
- "pause"
- "rollback"
Monitor:
description: |
Amount of time to monitor each updated task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during an update before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling out an updated task. Either
the old task is shut down before the new task is started, or the
new task is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
RollbackConfig:
description: "Specification for the rollback strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be rolled back in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: |
Amount of time between rollback iterations, in nanoseconds.
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an rolled back task fails to run, or stops
running during the rollback.
type: "string"
enum:
- "continue"
- "pause"
Monitor:
description: |
Amount of time to monitor each rolled back task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during a rollback before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling back a task. Either the old
task is shut down before the new task is started, or the new task
is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
EndpointSpec:
$ref: "#/definitions/EndpointSpec"
EndpointPortConfig:
type: "object"
properties:
Name:
type: "string"
Protocol:
type: "string"
enum:
- "tcp"
- "udp"
- "sctp"
TargetPort:
description: "The port inside the container."
type: "integer"
PublishedPort:
description: "The port on the swarm hosts."
type: "integer"
PublishMode:
description: |
The mode in which port is published.
<p><br /></p>
- "ingress" makes the target port accessible on every node,
regardless of whether there is a task for the service running on
that node or not.
- "host" bypasses the routing mesh and publish the port directly on
the swarm node where that service is running.
type: "string"
enum:
- "ingress"
- "host"
default: "ingress"
example: "ingress"
EndpointSpec:
description: "Properties that can be configured to access and load balance a service."
type: "object"
properties:
Mode:
description: |
The mode of resolution to use for internal load balancing between tasks.
type: "string"
enum:
- "vip"
- "dnsrr"
default: "vip"
Ports:
description: |
List of exposed ports that this service is accessible on from the
outside. Ports can only be provided if `vip` resolution mode is used.
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
Service:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ServiceSpec"
Endpoint:
type: "object"
properties:
Spec:
$ref: "#/definitions/EndpointSpec"
Ports:
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
VirtualIPs:
type: "array"
items:
type: "object"
properties:
NetworkID:
type: "string"
Addr:
type: "string"
UpdateStatus:
description: "The status of a service update."
type: "object"
properties:
State:
type: "string"
enum:
- "updating"
- "paused"
- "completed"
StartedAt:
type: "string"
format: "dateTime"
CompletedAt:
type: "string"
format: "dateTime"
Message:
type: "string"
ServiceStatus:
description: |
The status of the service's tasks. Provided only when requested as
part of a ServiceList operation.
type: "object"
properties:
RunningTasks:
description: |
The number of tasks for the service currently in the Running state.
type: "integer"
format: "uint64"
example: 7
DesiredTasks:
description: |
The number of tasks for the service desired to be running.
For replicated services, this is the replica count from the
service spec. For global services, this is computed by taking
count of all tasks for the service with a Desired State other
than Shutdown.
type: "integer"
format: "uint64"
example: 10
CompletedTasks:
description: |
The number of tasks for a job that are in the Completed state.
This field must be cross-referenced with the service type, as the
value of 0 may mean the service is not in a job mode, or it may
mean the job-mode service has no tasks yet Completed.
type: "integer"
format: "uint64"
JobStatus:
description: |
The status of the service when it is in one of ReplicatedJob or
GlobalJob modes. Absent on Replicated and Global mode services. The
JobIteration is an ObjectVersion, but unlike the Service's version,
does not need to be sent with an update request.
type: "object"
properties:
JobIteration:
description: |
JobIteration is a value increased each time a Job is executed,
successfully or otherwise. "Executed", in this case, means the
job as a whole has been started, not that an individual Task has
been launched. A job is "Executed" when its ServiceSpec is
updated. JobIteration can be used to disambiguate Tasks belonging
to different executions of a job. Though JobIteration will
increase with each subsequent execution, it may not necessarily
increase by 1, and so JobIteration should not be used to
$ref: "#/definitions/ObjectVersion"
LastExecution:
description: |
The last time, as observed by the server, that this job was
started.
type: "string"
format: "dateTime"
example:
ID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Version:
Index: 19
CreatedAt: "2016-06-07T21:05:51.880065305Z"
UpdatedAt: "2016-06-07T21:07:29.962229872Z"
Spec:
Name: "hopeful_cori"
TaskTemplate:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Endpoint:
Spec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
VirtualIPs:
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.2/16"
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.3/16"
ImageDeleteResponseItem:
type: "object"
properties:
Untagged:
description: "The image ID of an image that was untagged"
type: "string"
Deleted:
description: "The image ID of an image that was deleted"
type: "string"
ServiceUpdateResponse:
type: "object"
properties:
Warnings:
description: "Optional warning messages"
type: "array"
items:
type: "string"
example:
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
ContainerSummary:
type: "object"
properties:
Id:
description: "The ID of this container"
type: "string"
x-go-name: "ID"
Names:
description: "The names that this container has been given"
type: "array"
items:
type: "string"
Image:
description: "The name of the image used when creating this container"
type: "string"
ImageID:
description: "The ID of the image that this container was created from"
type: "string"
Command:
description: "Command to run when starting the container"
type: "string"
Created:
description: "When the container was created"
type: "integer"
format: "int64"
Ports:
description: "The ports exposed by this container"
type: "array"
items:
$ref: "#/definitions/Port"
SizeRw:
description: "The size of files that have been created or changed by this container"
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container"
type: "integer"
format: "int64"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
State:
description: "The state of this container (e.g. `Exited`)"
type: "string"
Status:
description: "Additional human-readable status of this container (e.g. `Exit 0`)"
type: "string"
HostConfig:
type: "object"
properties:
NetworkMode:
type: "string"
NetworkSettings:
description: "A summary of the container's network settings"
type: "object"
properties:
Networks:
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Driver:
description: "Driver represents a driver (network, logging, secrets)."
type: "object"
required: [Name]
properties:
Name:
description: "Name of the driver."
type: "string"
x-nullable: false
example: "some-driver"
Options:
description: "Key/value map of driver-specific options."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
OptionA: "value for driver-specific option A"
OptionB: "value for driver-specific option B"
SecretSpec:
type: "object"
properties:
Name:
description: "User-defined name of the secret."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
data to store as secret.
This field is only used to _create_ a secret, and is not returned by
other endpoints.
type: "string"
example: ""
Driver:
description: |
Name of the secrets driver used to fetch the secret's value from an
external secret store.
$ref: "#/definitions/Driver"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Secret:
type: "object"
properties:
ID:
type: "string"
example: "blt1owaxmitz71s9v5zh81zun"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
UpdatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
Spec:
$ref: "#/definitions/SecretSpec"
ConfigSpec:
type: "object"
properties:
Name:
description: "User-defined name of the config."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
config data.
type: "string"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Config:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ConfigSpec"
ContainerState:
description: |
ContainerState stores container's running state. It's part of ContainerJSONBase
and will be returned by the "inspect" command.
type: "object"
x-nullable: true
properties:
Status:
description: |
String representation of the container state. Can be one of "created",
"running", "paused", "restarting", "removing", "exited", or "dead".
type: "string"
enum: ["created", "running", "paused", "restarting", "removing", "exited", "dead"]
example: "running"
Running:
description: |
Whether this container is running.
Note that a running container can be _paused_. The `Running` and `Paused`
booleans are not mutually exclusive:
When pausing a container (on Linux), the freezer cgroup is used to suspend
all processes in the container. Freezing the process requires the process to
be running. As a result, paused containers are both `Running` _and_ `Paused`.
Use the `Status` field instead to determine if a container's state is "running".
type: "boolean"
example: true
Paused:
description: "Whether this container is paused."
type: "boolean"
example: false
Restarting:
description: "Whether this container is restarting."
type: "boolean"
example: false
OOMKilled:
description: |
Whether this container has been killed because it ran out of memory.
type: "boolean"
example: false
Dead:
type: "boolean"
example: false
Pid:
description: "The process ID of this container"
type: "integer"
example: 1234
ExitCode:
description: "The last exit code of this container"
type: "integer"
example: 0
Error:
type: "string"
StartedAt:
description: "The time when this container was last started."
type: "string"
example: "2020-01-06T09:06:59.461876391Z"
FinishedAt:
description: "The time when this container last exited."
type: "string"
example: "2020-01-06T09:07:59.461876391Z"
Health:
$ref: "#/definitions/Health"
ContainerCreateResponse:
description: "OK response to ContainerCreate operation"
type: "object"
title: "ContainerCreateResponse"
x-go-name: "CreateResponse"
required: [Id, Warnings]
properties:
Id:
description: "The ID of the created container"
type: "string"
x-nullable: false
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Warnings:
description: "Warnings encountered when creating the container"
type: "array"
x-nullable: false
items:
type: "string"
example: []
ContainerWaitResponse:
description: "OK response to ContainerWait operation"
type: "object"
x-go-name: "WaitResponse"
title: "ContainerWaitResponse"
required: [StatusCode, Error]
properties:
StatusCode:
description: "Exit code of the container"
type: "integer"
x-nullable: false
Error:
$ref: "#/definitions/ContainerWaitExitError"
ContainerWaitExitError:
description: "container waiting error, if any"
type: "object"
x-go-name: "WaitExitError"
properties:
Message:
description: "Details of an error"
type: "string"
SystemVersion:
type: "object"
description: |
Response of Engine API: GET "/version"
properties:
Platform:
type: "object"
required: [Name]
properties:
Name:
type: "string"
Components:
type: "array"
description: |
Information about system components
items:
type: "object"
x-go-name: ComponentVersion
required: [Name, Version]
properties:
Name:
description: |
Name of the component
type: "string"
example: "Engine"
Version:
description: |
Version of the component
type: "string"
x-nullable: false
example: "19.03.12"
Details:
description: |
Key/value pairs of strings with additional information about the
component. These values are intended for informational purposes
only, and their content is not defined, and not part of the API
specification.
These messages can be printed by the client as information to the user.
type: "object"
x-nullable: true
Version:
description: "The version of the daemon"
type: "string"
example: "19.03.12"
ApiVersion:
description: |
The default (and highest) API version that is supported by the daemon
type: "string"
example: "1.40"
MinAPIVersion:
description: |
The minimum API version that is supported by the daemon
type: "string"
example: "1.12"
GitCommit:
description: |
The Git commit of the source code that was used to build the daemon
type: "string"
example: "48a66213fe"
GoVersion:
description: |
The version Go used to compile the daemon, and the version of the Go
runtime in use.
type: "string"
example: "go1.13.14"
Os:
description: |
The operating system that the daemon is running on ("linux" or "windows")
type: "string"
example: "linux"
Arch:
description: |
The architecture that the daemon is running on
type: "string"
example: "amd64"
KernelVersion:
description: |
The kernel version (`uname -r`) that the daemon is running on.
This field is omitted when empty.
type: "string"
example: "4.19.76-linuxkit"
Experimental:
description: |
Indicates if the daemon is started with experimental features enabled.
This field is omitted when empty / false.
type: "boolean"
example: true
BuildTime:
description: |
The date and time that the daemon was compiled.
type: "string"
example: "2020-06-22T15:49:27.000000000+00:00"
SystemInfo:
type: "object"
properties:
ID:
description: |
Unique identifier of the daemon.
<p><br /></p>
> **Note**: The format of the ID itself is not part of the API, and
> should not be considered stable.
type: "string"
example: "7TRN:IPZB:QYBB:VPBQ:UMPP:KARE:6ZNR:XE6T:7EWV:PKF4:ZOJD:TPYS"
Containers:
description: "Total number of containers on the host."
type: "integer"
example: 14
ContainersRunning:
description: |
Number of containers with status `"running"`.
type: "integer"
example: 3
ContainersPaused:
description: |
Number of containers with status `"paused"`.
type: "integer"
example: 1
ContainersStopped:
description: |
Number of containers with status `"stopped"`.
type: "integer"
example: 10
Images:
description: |
Total number of images on the host.
Both _tagged_ and _untagged_ (dangling) images are counted.
type: "integer"
example: 508
Driver:
description: "Name of the storage driver in use."
type: "string"
example: "overlay2"
DriverStatus:
description: |
Information specific to the storage driver, provided as
"label" / "value" pairs.
This information is provided by the storage driver, and formatted
in a way consistent with the output of `docker info` on the command
line.
<p><br /></p>
> **Note**: The information returned in this field, including the
> formatting of values and labels, should not be considered stable,
> and may change without notice.
type: "array"
items:
type: "array"
items:
type: "string"
example:
- ["Backing Filesystem", "extfs"]
- ["Supports d_type", "true"]
- ["Native Overlay Diff", "true"]
DockerRootDir:
description: |
Root directory of persistent Docker state.
Defaults to `/var/lib/docker` on Linux, and `C:\ProgramData\docker`
on Windows.
type: "string"
example: "/var/lib/docker"
Plugins:
$ref: "#/definitions/PluginsInfo"
MemoryLimit:
description: "Indicates if the host has memory limit support enabled."
type: "boolean"
example: true
SwapLimit:
description: "Indicates if the host has memory swap limit support enabled."
type: "boolean"
example: true
KernelMemoryTCP:
description: |
Indicates if the host has kernel memory TCP limit support enabled. This
field is omitted if not supported.
Kernel memory TCP limits are not supported when using cgroups v2, which
does not support the corresponding `memory.kmem.tcp.limit_in_bytes` cgroup.
type: "boolean"
example: true
CpuCfsPeriod:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) period is supported by
the host.
type: "boolean"
example: true
CpuCfsQuota:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) quota is supported by
the host.
type: "boolean"
example: true
CPUShares:
description: |
Indicates if CPU Shares limiting is supported by the host.
type: "boolean"
example: true
CPUSet:
description: |
Indicates if CPUsets (cpuset.cpus, cpuset.mems) are supported by the host.
See [cpuset(7)](https://www.kernel.org/doc/Documentation/cgroup-v1/cpusets.txt)
type: "boolean"
example: true
PidsLimit:
description: "Indicates if the host kernel has PID limit support enabled."
type: "boolean"
example: true
OomKillDisable:
description: "Indicates if OOM killer disable is supported on the host."
type: "boolean"
IPv4Forwarding:
description: "Indicates IPv4 forwarding is enabled."
type: "boolean"
example: true
BridgeNfIptables:
description: "Indicates if `bridge-nf-call-iptables` is available on the host."
type: "boolean"
example: true
BridgeNfIp6tables:
description: "Indicates if `bridge-nf-call-ip6tables` is available on the host."
type: "boolean"
example: true
Debug:
description: |
Indicates if the daemon is running in debug-mode / with debug-level
logging enabled.
type: "boolean"
example: true
NFd:
description: |
The total number of file Descriptors in use by the daemon process.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 64
NGoroutines:
description: |
The number of goroutines that currently exist.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 174
SystemTime:
description: |
Current system-time in [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt)
format with nano-seconds.
type: "string"
example: "2017-08-08T20:28:29.06202363Z"
LoggingDriver:
description: |
The logging driver to use as a default for new containers.
type: "string"
CgroupDriver:
description: |
The driver to use for managing cgroups.
type: "string"
enum: ["cgroupfs", "systemd", "none"]
default: "cgroupfs"
example: "cgroupfs"
CgroupVersion:
description: |
The version of the cgroup.
type: "string"
enum: ["1", "2"]
default: "1"
example: "1"
NEventsListener:
description: "Number of event listeners subscribed."
type: "integer"
example: 30
KernelVersion:
description: |
Kernel version of the host.
On Linux, this information obtained from `uname`. On Windows this
information is queried from the <kbd>HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\</kbd>
registry value, for example _"10.0 14393 (14393.1198.amd64fre.rs1_release_sec.170427-1353)"_.
type: "string"
example: "4.9.38-moby"
OperatingSystem:
description: |
Name of the host's operating system, for example: "Ubuntu 16.04.2 LTS"
or "Windows Server 2016 Datacenter"
type: "string"
example: "Alpine Linux v3.5"
OSVersion:
description: |
Version of the host's operating system
<p><br /></p>
> **Note**: The information returned in this field, including its
> very existence, and the formatting of values, should not be considered
> stable, and may change without notice.
type: "string"
example: "16.04"
OSType:
description: |
Generic type of the operating system of the host, as returned by the
Go runtime (`GOOS`).
Currently returned values are "linux" and "windows". A full list of
possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "linux"
Architecture:
description: |
Hardware architecture of the host, as returned by the Go runtime
(`GOARCH`).
A full list of possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "x86_64"
NCPU:
description: |
The number of logical CPUs usable by the daemon.
The number of available CPUs is checked by querying the operating
system when the daemon starts. Changes to operating system CPU
allocation after the daemon is started are not reflected.
type: "integer"
example: 4
MemTotal:
description: |
Total amount of physical memory available on the host, in bytes.
type: "integer"
format: "int64"
example: 2095882240
IndexServerAddress:
description: |
Address / URL of the index server that is used for image search,
and as a default for user authentication for Docker Hub and Docker Cloud.
default: "https://index.docker.io/v1/"
type: "string"
example: "https://index.docker.io/v1/"
RegistryConfig:
$ref: "#/definitions/RegistryServiceConfig"
GenericResources:
$ref: "#/definitions/GenericResources"
HttpProxy:
description: |
HTTP-proxy configured for the daemon. This value is obtained from the
[`HTTP_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "http://xxxxx:[email protected]:8080"
HttpsProxy:
description: |
HTTPS-proxy configured for the daemon. This value is obtained from the
[`HTTPS_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "https://xxxxx:[email protected]:4443"
NoProxy:
description: |
Comma-separated list of domain extensions for which no proxy should be
used. This value is obtained from the [`NO_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html)
environment variable.
Containers do not automatically inherit this configuration.
type: "string"
example: "*.local, 169.254/16"
Name:
description: "Hostname of the host."
type: "string"
example: "node5.corp.example.com"
Labels:
description: |
User-defined labels (key/value metadata) as set on the daemon.
<p><br /></p>
> **Note**: When part of a Swarm, nodes can both have _daemon_ labels,
> set through the daemon configuration, and _node_ labels, set from a
> manager node in the Swarm. Node labels are not included in this
> field. Node labels can be retrieved using the `/nodes/(id)` endpoint
> on a manager node in the Swarm.
type: "array"
items:
type: "string"
example: ["storage=ssd", "production"]
ExperimentalBuild:
description: |
Indicates if experimental features are enabled on the daemon.
type: "boolean"
example: true
ServerVersion:
description: |
Version string of the daemon.
> **Note**: the [standalone Swarm API](https://docs.docker.com/swarm/swarm-api/)
> returns the Swarm version instead of the daemon version, for example
> `swarm/1.2.8`.
type: "string"
example: "17.06.0-ce"
ClusterStore:
description: |
URL of the distributed storage backend.
The storage backend is used for multihost networking (to store
network and endpoint information) and by the node discovery mechanism.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "consul://consul.corp.example.com:8600/some/path"
ClusterAdvertise:
description: |
The network endpoint that the Engine advertises for the purpose of
node discovery. ClusterAdvertise is a `host:port` combination on which
the daemon is reachable by other hosts.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "node5.corp.example.com:8000"
Runtimes:
description: |
List of [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtimes configured on the daemon. Keys hold the "name" used to
reference the runtime.
The Docker daemon relies on an OCI compliant runtime (invoked via the
`containerd` daemon) as its interface to the Linux kernel namespaces,
cgroups, and SELinux.
The default runtime is `runc`, and automatically configured. Additional
runtimes can be configured by the user and will be listed here.
type: "object"
additionalProperties:
$ref: "#/definitions/Runtime"
default:
runc:
path: "runc"
example:
runc:
path: "runc"
runc-master:
path: "/go/bin/runc"
custom:
path: "/usr/local/bin/my-oci-runtime"
runtimeArgs: ["--debug", "--systemd-cgroup=false"]
DefaultRuntime:
description: |
Name of the default OCI runtime that is used when starting containers.
The default can be overridden per-container at create time.
type: "string"
default: "runc"
example: "runc"
Swarm:
$ref: "#/definitions/SwarmInfo"
LiveRestoreEnabled:
description: |
Indicates if live restore is enabled.
If enabled, containers are kept running when the daemon is shutdown
or upon daemon start if running containers are detected.
type: "boolean"
default: false
example: false
Isolation:
description: |
Represents the isolation technology to use as a default for containers.
The supported values are platform-specific.
If no isolation value is specified on daemon start, on Windows client,
the default is `hyperv`, and on Windows server, the default is `process`.
This option is currently not used on other platforms.
default: "default"
type: "string"
enum:
- "default"
- "hyperv"
- "process"
InitBinary:
description: |
Name and, optional, path of the `docker-init` binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "docker-init"
ContainerdCommit:
$ref: "#/definitions/Commit"
RuncCommit:
$ref: "#/definitions/Commit"
InitCommit:
$ref: "#/definitions/Commit"
SecurityOptions:
description: |
List of security features that are enabled on the daemon, such as
apparmor, seccomp, SELinux, user-namespaces (userns), and rootless.
Additional configuration options for each security feature may
be present, and are included as a comma-separated list of key/value
pairs.
type: "array"
items:
type: "string"
example:
- "name=apparmor"
- "name=seccomp,profile=default"
- "name=selinux"
- "name=userns"
- "name=rootless"
ProductLicense:
description: |
Reports a summary of the product license on the daemon.
If a commercial license has been applied to the daemon, information
such as number of nodes, and expiration are included.
type: "string"
example: "Community Engine"
DefaultAddressPools:
description: |
List of custom default address pools for local networks, which can be
specified in the daemon.json file or dockerd option.
Example: a Base "10.10.0.0/16" with Size 24 will define the set of 256
10.10.[0-255].0/24 address pools.
type: "array"
items:
type: "object"
properties:
Base:
description: "The network address in CIDR format"
type: "string"
example: "10.10.0.0/16"
Size:
description: "The network pool size"
type: "integer"
example: "24"
Warnings:
description: |
List of warnings / informational messages about missing features, or
issues related to the daemon configuration.
These messages can be printed by the client as information to the user.
type: "array"
items:
type: "string"
example:
- "WARNING: No memory limit support"
- "WARNING: bridge-nf-call-iptables is disabled"
- "WARNING: bridge-nf-call-ip6tables is disabled"
# PluginsInfo is a temp struct holding Plugins name
# registered with docker daemon. It is used by Info struct
PluginsInfo:
description: |
Available plugins per type.
<p><br /></p>
> **Note**: Only unmanaged (V1) plugins are included in this list.
> V1 plugins are "lazily" loaded, and are not returned in this list
> if there is no resource using the plugin.
type: "object"
properties:
Volume:
description: "Names of available volume-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["local"]
Network:
description: "Names of available network-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["bridge", "host", "ipvlan", "macvlan", "null", "overlay"]
Authorization:
description: "Names of available authorization plugins."
type: "array"
items:
type: "string"
example: ["img-authz-plugin", "hbm"]
Log:
description: "Names of available logging-drivers, and logging-driver plugins."
type: "array"
items:
type: "string"
example: ["awslogs", "fluentd", "gcplogs", "gelf", "journald", "json-file", "logentries", "splunk", "syslog"]
RegistryServiceConfig:
description: |
RegistryServiceConfig stores daemon registry services configuration.
type: "object"
x-nullable: true
properties:
AllowNondistributableArtifactsCIDRs:
description: |
List of IP ranges to which nondistributable artifacts can be pushed,
using the CIDR syntax [RFC 4632](https://tools.ietf.org/html/4632).
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior, and enables the daemon to
push nondistributable artifacts to all registries whose resolved IP
address is within the subnet described by the CIDR syntax.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
AllowNondistributableArtifactsHostnames:
description: |
List of registry hostnames to which nondistributable artifacts can be
pushed, using the format `<hostname>[:<port>]` or `<IP address>[:<port>]`.
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior for the specified
registries.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["registry.internal.corp.example.com:3000", "[2001:db8:a0b:12f0::1]:443"]
InsecureRegistryCIDRs:
description: |
List of IP ranges of insecure registries, using the CIDR syntax
([RFC 4632](https://tools.ietf.org/html/4632)). Insecure registries
accept un-encrypted (HTTP) and/or untrusted (HTTPS with certificates
from unknown CAs) communication.
By default, local registries (`127.0.0.0/8`) are configured as
insecure. All other registries are secure. Communicating with an
insecure registry is not possible if the daemon assumes that registry
is secure.
This configuration override this behavior, insecure communication with
registries whose resolved IP address is within the subnet described by
the CIDR syntax.
Registries can also be marked insecure by hostname. Those registries
are listed under `IndexConfigs` and have their `Secure` field set to
`false`.
> **Warning**: Using this option can be useful when running a local
> registry, but introduces security vulnerabilities. This option
> should therefore ONLY be used for testing purposes. For increased
> security, users should add their CA to their system's list of trusted
> CAs instead of enabling this option.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
IndexConfigs:
type: "object"
additionalProperties:
$ref: "#/definitions/IndexInfo"
example:
"127.0.0.1:5000":
"Name": "127.0.0.1:5000"
"Mirrors": []
"Secure": false
"Official": false
"[2001:db8:a0b:12f0::1]:80":
"Name": "[2001:db8:a0b:12f0::1]:80"
"Mirrors": []
"Secure": false
"Official": false
"docker.io":
Name: "docker.io"
Mirrors: ["https://hub-mirror.corp.example.com:5000/"]
Secure: true
Official: true
"registry.internal.corp.example.com:3000":
Name: "registry.internal.corp.example.com:3000"
Mirrors: []
Secure: false
Official: false
Mirrors:
description: |
List of registry URLs that act as a mirror for the official
(`docker.io`) registry.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://[2001:db8:a0b:12f0::1]/"
IndexInfo:
description:
IndexInfo contains information about a registry.
type: "object"
x-nullable: true
properties:
Name:
description: |
Name of the registry, such as "docker.io".
type: "string"
example: "docker.io"
Mirrors:
description: |
List of mirrors, expressed as URIs.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://registry-2.docker.io/"
- "https://registry-3.docker.io/"
Secure:
description: |
Indicates if the registry is part of the list of insecure
registries.
If `false`, the registry is insecure. Insecure registries accept
un-encrypted (HTTP) and/or untrusted (HTTPS with certificates from
unknown CAs) communication.
> **Warning**: Insecure registries can be useful when running a local
> registry. However, because its use creates security vulnerabilities
> it should ONLY be enabled for testing purposes. For increased
> security, users should add their CA to their system's list of
> trusted CAs instead of enabling this option.
type: "boolean"
example: true
Official:
description: |
Indicates whether this is an official registry (i.e., Docker Hub / docker.io)
type: "boolean"
example: true
Runtime:
description: |
Runtime describes an [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtime.
The runtime is invoked by the daemon via the `containerd` daemon. OCI
runtimes act as an interface to the Linux kernel namespaces, cgroups,
and SELinux.
type: "object"
properties:
path:
description: |
Name and, optional, path, of the OCI executable binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "/usr/local/bin/my-oci-runtime"
runtimeArgs:
description: |
List of command-line arguments to pass to the runtime when invoked.
type: "array"
x-nullable: true
items:
type: "string"
example: ["--debug", "--systemd-cgroup=false"]
Commit:
description: |
Commit holds the Git-commit (SHA1) that a binary was built from, as
reported in the version-string of external tools, such as `containerd`,
or `runC`.
type: "object"
properties:
ID:
description: "Actual commit ID of external tool."
type: "string"
example: "cfb82a876ecc11b5ca0977d1733adbe58599088a"
Expected:
description: |
Commit ID of external tool expected by dockerd as set at build time.
type: "string"
example: "2d41c047c83e09a6d61d464906feb2a2f3c52aa4"
SwarmInfo:
description: |
Represents generic information about swarm.
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
default: ""
example: "k67qz4598weg5unwwffg6z1m1"
NodeAddr:
description: |
IP address at which this node can be reached by other nodes in the
swarm.
type: "string"
default: ""
example: "10.0.0.46"
LocalNodeState:
$ref: "#/definitions/LocalNodeState"
ControlAvailable:
type: "boolean"
default: false
example: true
Error:
type: "string"
default: ""
RemoteManagers:
description: |
List of ID's and addresses of other managers in the swarm.
type: "array"
default: null
x-nullable: true
items:
$ref: "#/definitions/PeerNode"
example:
- NodeID: "71izy0goik036k48jg985xnds"
Addr: "10.0.0.158:2377"
- NodeID: "79y6h1o4gv8n120drcprv5nmc"
Addr: "10.0.0.159:2377"
- NodeID: "k67qz4598weg5unwwffg6z1m1"
Addr: "10.0.0.46:2377"
Nodes:
description: "Total number of nodes in the swarm."
type: "integer"
x-nullable: true
example: 4
Managers:
description: "Total number of managers in the swarm."
type: "integer"
x-nullable: true
example: 3
Cluster:
$ref: "#/definitions/ClusterInfo"
LocalNodeState:
description: "Current local status of this node."
type: "string"
default: ""
enum:
- ""
- "inactive"
- "pending"
- "active"
- "error"
- "locked"
example: "active"
PeerNode:
description: "Represents a peer-node in the swarm"
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
Addr:
description: |
IP address and ports at which this node can be reached.
type: "string"
NetworkAttachmentConfig:
description: |
Specifies how a service should be attached to a particular network.
type: "object"
properties:
Target:
description: |
The target network for attachment. Must be a network name or ID.
type: "string"
Aliases:
description: |
Discoverable alternate names for the service on this network.
type: "array"
items:
type: "string"
DriverOpts:
description: |
Driver attachment options for the network target.
type: "object"
additionalProperties:
type: "string"
EventActor:
description: |
Actor describes something that generates events, like a container, network,
or a volume.
type: "object"
properties:
ID:
description: "The ID of the object emitting the event"
type: "string"
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Attributes:
description: |
Various key/value attributes of the object, depending on its type.
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-label-value"
image: "alpine:latest"
name: "my-container"
EventMessage:
description: |
EventMessage represents the information an event contains.
type: "object"
title: "SystemEventsResponse"
properties:
Type:
description: "The type of object emitting the event"
type: "string"
enum: ["builder", "config", "container", "daemon", "image", "network", "node", "plugin", "secret", "service", "volume"]
example: "container"
Action:
description: "The type of event"
type: "string"
example: "create"
Actor:
$ref: "#/definitions/EventActor"
scope:
description: |
Scope of the event. Engine events are `local` scope. Cluster (Swarm)
events are `swarm` scope.
type: "string"
enum: ["local", "swarm"]
time:
description: "Timestamp of event"
type: "integer"
format: "int64"
example: 1629574695
timeNano:
description: "Timestamp of event, with nanosecond accuracy"
type: "integer"
format: "int64"
example: 1629574695515050031
OCIDescriptor:
type: "object"
x-go-name: Descriptor
description: |
A descriptor struct containing digest, media type, and size, as defined in
the [OCI Content Descriptors Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/descriptor.md).
properties:
mediaType:
description: |
The media type of the object this schema refers to.
type: "string"
example: "application/vnd.docker.distribution.manifest.v2+json"
digest:
description: |
The digest of the targeted content.
type: "string"
example: "sha256:c0537ff6a5218ef531ece93d4984efc99bbf3f7497c0a7726c88e2bb7584dc96"
size:
description: |
The size in bytes of the blob.
type: "integer"
format: "int64"
example: 3987495
# TODO Not yet including these fields for now, as they are nil / omitted in our response.
# urls:
# description: |
# List of URLs from which this object MAY be downloaded.
# type: "array"
# items:
# type: "string"
# format: "uri"
# annotations:
# description: |
# Arbitrary metadata relating to the targeted content.
# type: "object"
# additionalProperties:
# type: "string"
# platform:
# $ref: "#/definitions/OCIPlatform"
OCIPlatform:
type: "object"
x-go-name: Platform
description: |
Describes the platform which the image in the manifest runs on, as defined
in the [OCI Image Index Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/image-index.md).
properties:
architecture:
description: |
The CPU architecture, for example `amd64` or `ppc64`.
type: "string"
example: "arm"
os:
description: |
The operating system, for example `linux` or `windows`.
type: "string"
example: "windows"
os.version:
description: |
Optional field specifying the operating system version, for example on
Windows `10.0.19041.1165`.
type: "string"
example: "10.0.19041.1165"
os.features:
description: |
Optional field specifying an array of strings, each listing a required
OS feature (for example on Windows `win32k`).
type: "array"
items:
type: "string"
example:
- "win32k"
variant:
description: |
Optional field specifying a variant of the CPU, for example `v7` to
specify ARMv7 when architecture is `arm`.
type: "string"
example: "v7"
DistributionInspect:
type: "object"
x-go-name: DistributionInspect
title: "DistributionInspectResponse"
required: [Descriptor, Platforms]
description: |
Describes the result obtained from contacting the registry to retrieve
image metadata.
properties:
Descriptor:
$ref: "#/definitions/OCIDescriptor"
Platforms:
type: "array"
description: |
An array containing all platforms supported by the image.
items:
$ref: "#/definitions/OCIPlatform"
paths:
/containers/json:
get:
summary: "List containers"
description: |
Returns a list of containers. For details on the format, see the
[inspect endpoint](#operation/ContainerInspect).
Note that it uses a different, smaller representation of a container
than inspecting a single container. For example, the list of linked
containers is not propagated .
operationId: "ContainerList"
produces:
- "application/json"
parameters:
- name: "all"
in: "query"
description: |
Return all containers. By default, only running containers are shown.
type: "boolean"
default: false
- name: "limit"
in: "query"
description: |
Return this number of most recently created containers, including
non-running ones.
type: "integer"
- name: "size"
in: "query"
description: |
Return the size of container as fields `SizeRw` and `SizeRootFs`.
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
Filters to process on the container list, encoded as JSON (a
`map[string][]string`). For example, `{"status": ["paused"]}` will
only return paused containers.
Available filters:
- `ancestor`=(`<image-name>[:<tag>]`, `<image id>`, or `<image@digest>`)
- `before`=(`<container id>` or `<container name>`)
- `expose`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `exited=<int>` containers with exit code of `<int>`
- `health`=(`starting`|`healthy`|`unhealthy`|`none`)
- `id=<ID>` a container's ID
- `isolation=`(`default`|`process`|`hyperv`) (Windows daemon only)
- `is-task=`(`true`|`false`)
- `label=key` or `label="key=value"` of a container label
- `name=<name>` a container's name
- `network`=(`<network id>` or `<network name>`)
- `publish`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `since`=(`<container id>` or `<container name>`)
- `status=`(`created`|`restarting`|`running`|`removing`|`paused`|`exited`|`dead`)
- `volume`=(`<volume name>` or `<mount point destination>`)
type: "string"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
examples:
application/json:
- Id: "8dfafdbc3a40"
Names:
- "/boring_feynman"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 1"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports:
- PrivatePort: 2222
PublicPort: 3333
Type: "tcp"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "2cdc4edb1ded3631c81f57966563e5c8525b81121bb3706a9a9a3ae102711f3f"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:02"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
- Id: "9cd87474be90"
Names:
- "/coolName"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 222222"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "88eaed7b37b38c2a3f0c4bc796494fdf51b270c2d22656412a2ca5d559a64d7a"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.8"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:08"
Mounts: []
- Id: "3176a2479c92"
Names:
- "/sleepy_dog"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 3333333333333333"
Created: 1367854154
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "8b27c041c30326d59cd6e6f510d4f8d1d570a228466f956edf7815508f78e30d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.6"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:06"
Mounts: []
- Id: "4cb07b47f9fb"
Names:
- "/running_cat"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 444444444444444444444444444444444"
Created: 1367854152
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "d91c7b2f0644403d7ef3095985ea0e2370325cd2332ff3a3225c4247328e66e9"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.5"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:05"
Mounts: []
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/create:
post:
summary: "Create a container"
operationId: "ContainerCreate"
consumes:
- "application/json"
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "name"
in: "query"
description: |
Assign the specified name to the container. Must match
`/?[a-zA-Z0-9][a-zA-Z0-9_.-]+`.
type: "string"
pattern: "^/?[a-zA-Z0-9][a-zA-Z0-9_.-]+$"
- name: "body"
in: "body"
description: "Container to create"
schema:
allOf:
- $ref: "#/definitions/ContainerConfig"
- type: "object"
properties:
HostConfig:
$ref: "#/definitions/HostConfig"
NetworkingConfig:
$ref: "#/definitions/NetworkingConfig"
example:
Hostname: ""
Domainname: ""
User: ""
AttachStdin: false
AttachStdout: true
AttachStderr: true
Tty: false
OpenStdin: false
StdinOnce: false
Env:
- "FOO=bar"
- "BAZ=quux"
Cmd:
- "date"
Entrypoint: ""
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
Volumes:
/volumes/data: {}
WorkingDir: ""
NetworkDisabled: false
MacAddress: "12:34:56:78:9a:bc"
ExposedPorts:
22/tcp: {}
StopSignal: "SIGTERM"
StopTimeout: 10
HostConfig:
Binds:
- "/tmp:/tmp"
Links:
- "redis3:redis"
Memory: 0
MemorySwap: 0
MemoryReservation: 0
NanoCpus: 500000
CpuPercent: 80
CpuShares: 512
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpuQuota: 50000
CpusetCpus: "0,1"
CpusetMems: "0,1"
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 300
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceWriteIOps:
- {}
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
MemorySwappiness: 60
OomKillDisable: false
OomScoreAdj: 500
PidMode: ""
PidsLimit: 0
PortBindings:
22/tcp:
- HostPort: "11022"
PublishAllPorts: false
Privileged: false
ReadonlyRootfs: false
Dns:
- "8.8.8.8"
DnsOptions:
- ""
DnsSearch:
- ""
VolumesFrom:
- "parent"
- "other:ro"
CapAdd:
- "NET_ADMIN"
CapDrop:
- "MKNOD"
GroupAdd:
- "newgroup"
RestartPolicy:
Name: ""
MaximumRetryCount: 0
AutoRemove: true
NetworkMode: "bridge"
Devices: []
Ulimits:
- {}
LogConfig:
Type: "json-file"
Config: {}
SecurityOpt: []
StorageOpt: {}
CgroupParent: ""
VolumeDriver: ""
ShmSize: 67108864
NetworkingConfig:
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
required: true
responses:
201:
description: "Container created successfully"
schema:
$ref: "#/definitions/ContainerCreateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/{id}/json:
get:
summary: "Inspect a container"
description: "Return low-level information about a container."
operationId: "ContainerInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerInspectResponse"
properties:
Id:
description: "The ID of the container"
type: "string"
Created:
description: "The time the container was created"
type: "string"
Path:
description: "The path to the command being run"
type: "string"
Args:
description: "The arguments to the command being run"
type: "array"
items:
type: "string"
State:
$ref: "#/definitions/ContainerState"
Image:
description: "The container's image ID"
type: "string"
ResolvConfPath:
type: "string"
HostnamePath:
type: "string"
HostsPath:
type: "string"
LogPath:
type: "string"
Name:
type: "string"
RestartCount:
type: "integer"
Driver:
type: "string"
Platform:
type: "string"
MountLabel:
type: "string"
ProcessLabel:
type: "string"
AppArmorProfile:
type: "string"
ExecIDs:
description: "IDs of exec instances that are running in the container."
type: "array"
items:
type: "string"
x-nullable: true
HostConfig:
$ref: "#/definitions/HostConfig"
GraphDriver:
$ref: "#/definitions/GraphDriverData"
SizeRw:
description: |
The size of files that have been created or changed by this
container.
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container."
type: "integer"
format: "int64"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Config:
$ref: "#/definitions/ContainerConfig"
NetworkSettings:
$ref: "#/definitions/NetworkSettings"
examples:
application/json:
AppArmorProfile: ""
Args:
- "-c"
- "exit 9"
Config:
AttachStderr: true
AttachStdin: false
AttachStdout: true
Cmd:
- "/bin/sh"
- "-c"
- "exit 9"
Domainname: ""
Env:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Healthcheck:
Test: ["CMD-SHELL", "exit 0"]
Hostname: "ba033ac44011"
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
MacAddress: ""
NetworkDisabled: false
OpenStdin: false
StdinOnce: false
Tty: false
User: ""
Volumes:
/volumes/data: {}
WorkingDir: ""
StopSignal: "SIGTERM"
StopTimeout: 10
Created: "2015-01-06T15:47:31.485331387Z"
Driver: "devicemapper"
ExecIDs:
- "b35395de42bc8abd327f9dd65d913b9ba28c74d2f0734eeeae84fa1c616a0fca"
- "3fc1232e5cd20c8de182ed81178503dc6437f4e7ef12b52cc5e8de020652f1c4"
HostConfig:
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 0
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteIOps:
- {}
ContainerIDFile: ""
CpusetCpus: ""
CpusetMems: ""
CpuPercent: 80
CpuShares: 0
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
Devices: []
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
IpcMode: ""
Memory: 0
MemorySwap: 0
MemoryReservation: 0
OomKillDisable: false
OomScoreAdj: 500
NetworkMode: "bridge"
PidMode: ""
PortBindings: {}
Privileged: false
ReadonlyRootfs: false
PublishAllPorts: false
RestartPolicy:
MaximumRetryCount: 2
Name: "on-failure"
LogConfig:
Type: "json-file"
Sysctls:
net.ipv4.ip_forward: "1"
Ulimits:
- {}
VolumeDriver: ""
ShmSize: 67108864
HostnamePath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hostname"
HostsPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hosts"
LogPath: "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b-json.log"
Id: "ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39"
Image: "04c5d3b7b0656168630d3ba35d8889bd0e9caafcaeb3004d2bfbc47e7c5d35d2"
MountLabel: ""
Name: "/boring_euclid"
NetworkSettings:
Bridge: ""
SandboxID: ""
HairpinMode: false
LinkLocalIPv6Address: ""
LinkLocalIPv6PrefixLen: 0
SandboxKey: ""
EndpointID: ""
Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
IPAddress: ""
IPPrefixLen: 0
IPv6Gateway: ""
MacAddress: ""
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "7587b82f0dada3656fda26588aee72630c6fab1536d36e394b2bfbcf898c971d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Path: "/bin/sh"
ProcessLabel: ""
ResolvConfPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/resolv.conf"
RestartCount: 1
State:
Error: ""
ExitCode: 9
FinishedAt: "2015-01-06T15:47:32.080254511Z"
Health:
Status: "healthy"
FailingStreak: 0
Log:
- Start: "2019-12-22T10:59:05.6385933Z"
End: "2019-12-22T10:59:05.8078452Z"
ExitCode: 0
Output: ""
OOMKilled: false
Dead: false
Paused: false
Pid: 0
Restarting: false
Running: true
StartedAt: "2015-01-06T15:47:32.072697474Z"
Status: "running"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "size"
in: "query"
type: "boolean"
default: false
description: "Return the size of container as fields `SizeRw` and `SizeRootFs`"
tags: ["Container"]
/containers/{id}/top:
get:
summary: "List processes running inside a container"
description: |
On Unix systems, this is done by running the `ps` command. This endpoint
is not supported on Windows.
operationId: "ContainerTop"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerTopResponse"
description: "OK response to ContainerTop operation"
properties:
Titles:
description: "The ps column titles"
type: "array"
items:
type: "string"
Processes:
description: |
Each process running in the container, where each is process
is an array of values corresponding to the titles.
type: "array"
items:
type: "array"
items:
type: "string"
examples:
application/json:
Titles:
- "UID"
- "PID"
- "PPID"
- "C"
- "STIME"
- "TTY"
- "TIME"
- "CMD"
Processes:
-
- "root"
- "13642"
- "882"
- "0"
- "17:03"
- "pts/0"
- "00:00:00"
- "/bin/bash"
-
- "root"
- "13735"
- "13642"
- "0"
- "17:06"
- "pts/0"
- "00:00:00"
- "sleep 10"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "ps_args"
in: "query"
description: "The arguments to pass to `ps`. For example, `aux`"
type: "string"
default: "-ef"
tags: ["Container"]
/containers/{id}/logs:
get:
summary: "Get container logs"
description: |
Get `stdout` and `stderr` logs from a container.
Note: This endpoint works only for containers with the `json-file` or
`journald` logging driver.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ContainerLogs"
responses:
200:
description: |
logs returned as a stream in response body.
For the stream format, [see the documentation for the attach endpoint](#operation/ContainerAttach).
Note that unlike the attach endpoint, the logs endpoint does not
upgrade the connection and does not set Content-Type.
schema:
type: "string"
format: "binary"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "until"
in: "query"
description: "Only return logs before this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Container"]
/containers/{id}/changes:
get:
summary: "Get changes on a container’s filesystem"
description: |
Returns which files in a container's filesystem have been added, deleted,
or modified. The `Kind` of modification can be one of:
- `0`: Modified
- `1`: Added
- `2`: Deleted
operationId: "ContainerChanges"
produces: ["application/json"]
responses:
200:
description: "The list of changes"
schema:
type: "array"
items:
type: "object"
x-go-name: "ContainerChangeResponseItem"
title: "ContainerChangeResponseItem"
description: "change item in response to ContainerChanges operation"
required: [Path, Kind]
properties:
Path:
description: "Path to file that has changed"
type: "string"
x-nullable: false
Kind:
description: "Kind of change"
type: "integer"
format: "uint8"
enum: [0, 1, 2]
x-nullable: false
examples:
application/json:
- Path: "/dev"
Kind: 0
- Path: "/dev/kmsg"
Kind: 1
- Path: "/test"
Kind: 1
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/export:
get:
summary: "Export a container"
description: "Export the contents of a container as a tarball."
operationId: "ContainerExport"
produces:
- "application/octet-stream"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/stats:
get:
summary: "Get container stats based on resource usage"
description: |
This endpoint returns a live stream of a container’s resource usage
statistics.
The `precpu_stats` is the CPU statistic of the *previous* read, and is
used to calculate the CPU usage percentage. It is not an exact copy
of the `cpu_stats` field.
If either `precpu_stats.online_cpus` or `cpu_stats.online_cpus` is
nil then for compatibility with older daemons the length of the
corresponding `cpu_usage.percpu_usage` array should be used.
On a cgroup v2 host, the following fields are not set
* `blkio_stats`: all fields other than `io_service_bytes_recursive`
* `cpu_stats`: `cpu_usage.percpu_usage`
* `memory_stats`: `max_usage` and `failcnt`
Also, `memory_stats.stats` fields are incompatible with cgroup v1.
To calculate the values shown by the `stats` command of the docker cli tool
the following formulas can be used:
* used_memory = `memory_stats.usage - memory_stats.stats.cache`
* available_memory = `memory_stats.limit`
* Memory usage % = `(used_memory / available_memory) * 100.0`
* cpu_delta = `cpu_stats.cpu_usage.total_usage - precpu_stats.cpu_usage.total_usage`
* system_cpu_delta = `cpu_stats.system_cpu_usage - precpu_stats.system_cpu_usage`
* number_cpus = `lenght(cpu_stats.cpu_usage.percpu_usage)` or `cpu_stats.online_cpus`
* CPU usage % = `(cpu_delta / system_cpu_delta) * number_cpus * 100.0`
operationId: "ContainerStats"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
type: "object"
examples:
application/json:
read: "2015-01-08T22:57:31.547920715Z"
pids_stats:
current: 3
networks:
eth0:
rx_bytes: 5338
rx_dropped: 0
rx_errors: 0
rx_packets: 36
tx_bytes: 648
tx_dropped: 0
tx_errors: 0
tx_packets: 8
eth5:
rx_bytes: 4641
rx_dropped: 0
rx_errors: 0
rx_packets: 26
tx_bytes: 690
tx_dropped: 0
tx_errors: 0
tx_packets: 9
memory_stats:
stats:
total_pgmajfault: 0
cache: 0
mapped_file: 0
total_inactive_file: 0
pgpgout: 414
rss: 6537216
total_mapped_file: 0
writeback: 0
unevictable: 0
pgpgin: 477
total_unevictable: 0
pgmajfault: 0
total_rss: 6537216
total_rss_huge: 6291456
total_writeback: 0
total_inactive_anon: 0
rss_huge: 6291456
hierarchical_memory_limit: 67108864
total_pgfault: 964
total_active_file: 0
active_anon: 6537216
total_active_anon: 6537216
total_pgpgout: 414
total_cache: 0
inactive_anon: 0
active_file: 0
pgfault: 964
inactive_file: 0
total_pgpgin: 477
max_usage: 6651904
usage: 6537216
failcnt: 0
limit: 67108864
blkio_stats: {}
cpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24472255
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100215355
usage_in_kernelmode: 30000000
system_cpu_usage: 739306590000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
precpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24350896
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100093996
usage_in_kernelmode: 30000000
system_cpu_usage: 9492140000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "stream"
in: "query"
description: |
Stream the output. If false, the stats will be output once and then
it will disconnect.
type: "boolean"
default: true
- name: "one-shot"
in: "query"
description: |
Only get a single stat instead of waiting for 2 cycles. Must be used
with `stream=false`.
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/resize:
post:
summary: "Resize a container TTY"
description: "Resize the TTY for a container."
operationId: "ContainerResize"
consumes:
- "application/octet-stream"
produces:
- "text/plain"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "cannot resize container"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Container"]
/containers/{id}/start:
post:
summary: "Start a container"
operationId: "ContainerStart"
responses:
204:
description: "no error"
304:
description: "container already started"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container. Format is a
single character `[a-Z]` or `ctrl-<value>` where `<value>` is one
of: `a-z`, `@`, `^`, `[`, `,` or `_`.
type: "string"
tags: ["Container"]
/containers/{id}/stop:
post:
summary: "Stop a container"
operationId: "ContainerStop"
responses:
204:
description: "no error"
304:
description: "container already stopped"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/restart:
post:
summary: "Restart a container"
operationId: "ContainerRestart"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/kill:
post:
summary: "Kill a container"
description: |
Send a POSIX signal to a container, defaulting to killing to the
container.
operationId: "ContainerKill"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is not running"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "Container d37cde0fe4ad63c3a7252023b2f9800282894247d145cb5933ddf6e52cc03a28 is not running"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
default: "SIGKILL"
tags: ["Container"]
/containers/{id}/update:
post:
summary: "Update a container"
description: |
Change various configuration options of a container without having to
recreate it.
operationId: "ContainerUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "The container has been updated."
schema:
type: "object"
title: "ContainerUpdateResponse"
description: "OK response to ContainerUpdate operation"
properties:
Warnings:
type: "array"
items:
type: "string"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "update"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
example:
BlkioWeight: 300
CpuShares: 512
CpuPeriod: 100000
CpuQuota: 50000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpusetCpus: "0,1"
CpusetMems: "0"
Memory: 314572800
MemorySwap: 514288000
MemoryReservation: 209715200
RestartPolicy:
MaximumRetryCount: 4
Name: "on-failure"
tags: ["Container"]
/containers/{id}/rename:
post:
summary: "Rename a container"
operationId: "ContainerRename"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "name already in use"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "name"
in: "query"
required: true
description: "New name for the container"
type: "string"
tags: ["Container"]
/containers/{id}/pause:
post:
summary: "Pause a container"
description: |
Use the freezer cgroup to suspend all processes in a container.
Traditionally, when suspending a process the `SIGSTOP` signal is used,
which is observable by the process being suspended. With the freezer
cgroup the process is unaware, and unable to capture, that it is being
suspended, and subsequently resumed.
operationId: "ContainerPause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/unpause:
post:
summary: "Unpause a container"
description: "Resume a container which has been paused."
operationId: "ContainerUnpause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/attach:
post:
summary: "Attach to a container"
description: |
Attach to a container to read its output or send it input. You can attach
to the same container multiple times and you can reattach to containers
that have been detached.
Either the `stream` or `logs` parameter must be `true` for this endpoint
to do anything.
See the [documentation for the `docker attach` command](https://docs.docker.com/engine/reference/commandline/attach/)
for more details.
### Hijacking
This endpoint hijacks the HTTP connection to transport `stdin`, `stdout`,
and `stderr` on the same socket.
This is the response from the daemon for an attach request:
```
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
[STREAM]
```
After the headers and two new lines, the TCP connection can now be used
for raw, bidirectional communication between the client and server.
To hint potential proxies about connection hijacking, the Docker client
can also optionally send connection upgrade headers.
For example, the client sends this request to upgrade the connection:
```
POST /containers/16253994b7c4/attach?stream=1&stdout=1 HTTP/1.1
Upgrade: tcp
Connection: Upgrade
```
The Docker daemon will respond with a `101 UPGRADED` response, and will
similarly follow with the raw stream:
```
HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp
[STREAM]
```
### Stream format
When the TTY setting is disabled in [`POST /containers/create`](#operation/ContainerCreate),
the HTTP Content-Type header is set to application/vnd.docker.multiplexed-stream
and the stream over the hijacked connected is multiplexed to separate out
`stdout` and `stderr`. The stream consists of a series of frames, each
containing a header and a payload.
The header contains the information which the stream writes (`stdout` or
`stderr`). It also contains the size of the associated frame encoded in
the last four bytes (`uint32`).
It is encoded on the first eight bytes like this:
```go
header := [8]byte{STREAM_TYPE, 0, 0, 0, SIZE1, SIZE2, SIZE3, SIZE4}
```
`STREAM_TYPE` can be:
- 0: `stdin` (is written on `stdout`)
- 1: `stdout`
- 2: `stderr`
`SIZE1, SIZE2, SIZE3, SIZE4` are the four bytes of the `uint32` size
encoded as big endian.
Following the header is the payload, which is the specified number of
bytes of `STREAM_TYPE`.
The simplest way to implement this protocol is the following:
1. Read 8 bytes.
2. Choose `stdout` or `stderr` depending on the first byte.
3. Extract the frame size from the last four bytes.
4. Read the extracted size and output it on the correct output.
5. Goto 1.
### Stream format when using a TTY
When the TTY setting is enabled in [`POST /containers/create`](#operation/ContainerCreate),
the stream is not multiplexed. The data exchanged over the hijacked
connection is simply the raw data from the process PTY and client's
`stdin`.
operationId: "ContainerAttach"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,` or `_`.
type: "string"
- name: "logs"
in: "query"
description: |
Replay previous logs from the container.
This is useful for attaching to a container that has started and you
want to output everything since the container started.
If `stream` is also enabled, once all the previous output has been
returned, it will seamlessly transition into streaming current
output.
type: "boolean"
default: false
- name: "stream"
in: "query"
description: |
Stream attached streams from the time the request was made onwards.
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/attach/ws:
get:
summary: "Attach to a container via a websocket"
operationId: "ContainerAttachWebsocket"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,`, or `_`.
type: "string"
- name: "logs"
in: "query"
description: "Return logs"
type: "boolean"
default: false
- name: "stream"
in: "query"
description: "Return stream"
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/wait:
post:
summary: "Wait for a container"
description: "Block until a container stops, then returns the exit code."
operationId: "ContainerWait"
produces: ["application/json"]
responses:
200:
description: "The container has exit."
schema:
$ref: "#/definitions/ContainerWaitResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "condition"
in: "query"
description: |
Wait until a container state reaches the given condition.
Defaults to `not-running` if omitted or empty.
type: "string"
enum:
- "not-running"
- "next-exit"
- "removed"
default: "not-running"
tags: ["Container"]
/containers/{id}:
delete:
summary: "Remove a container"
operationId: "ContainerDelete"
responses:
204:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: |
You cannot remove a running container: c2ada9df5af8. Stop the
container before attempting removal or force remove
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "v"
in: "query"
description: "Remove anonymous volumes associated with the container."
type: "boolean"
default: false
- name: "force"
in: "query"
description: "If the container is running, kill it before removing it."
type: "boolean"
default: false
- name: "link"
in: "query"
description: "Remove the specified link associated with the container."
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/archive:
head:
summary: "Get information about files in a container"
description: |
A response header `X-Docker-Container-Path-Stat` is returned, containing
a base64 - encoded JSON object with some filesystem header information
about the path.
operationId: "ContainerArchiveInfo"
responses:
200:
description: "no error"
headers:
X-Docker-Container-Path-Stat:
type: "string"
description: |
A base64 - encoded JSON object with some filesystem header
information about the path
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
get:
summary: "Get an archive of a filesystem resource in a container"
description: "Get a tar archive of a resource in the filesystem of container id."
operationId: "ContainerArchive"
produces: ["application/x-tar"]
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
put:
summary: "Extract an archive of files or folders to a directory in a container"
description: |
Upload a tar archive to be extracted to a path in the filesystem of container id.
`path` parameter is asserted to be a directory. If it exists as a file, 400 error
will be returned with message "not a directory".
operationId: "PutContainerArchive"
consumes: ["application/x-tar", "application/octet-stream"]
responses:
200:
description: "The content was extracted successfully"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "not a directory"
403:
description: "Permission denied, the volume or container rootfs is marked as read-only."
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such container or path does not exist inside the container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Path to a directory in the container to extract the archive’s contents into. "
type: "string"
- name: "noOverwriteDirNonDir"
in: "query"
description: |
If `1`, `true`, or `True` then it will be an error if unpacking the
given content would cause an existing directory to be replaced with
a non-directory and vice versa.
type: "string"
- name: "copyUIDGID"
in: "query"
description: |
If `1`, `true`, then it will copy UID/GID maps to the dest file or
dir
type: "string"
- name: "inputStream"
in: "body"
required: true
description: |
The input stream must be a tar archive compressed with one of the
following algorithms: `identity` (no compression), `gzip`, `bzip2`,
or `xz`.
schema:
type: "string"
format: "binary"
tags: ["Container"]
/containers/prune:
post:
summary: "Delete stopped containers"
produces:
- "application/json"
operationId: "ContainerPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune containers created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune containers with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ContainerPruneResponse"
properties:
ContainersDeleted:
description: "Container IDs that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/images/json:
get:
summary: "List Images"
description: "Returns a list of images on the server. Note that it uses a different, smaller representation of an image than inspecting a single image."
operationId: "ImageList"
produces:
- "application/json"
responses:
200:
description: "Summary image data for the images matching the query"
schema:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "all"
in: "query"
description: "Show all images. Only images from a final layer (no children) are shown by default."
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the images list.
Available filters:
- `before`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
- `dangling=true`
- `label=key` or `label="key=value"` of an image label
- `reference`=(`<image-name>[:<tag>]`)
- `since`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
type: "string"
- name: "shared-size"
in: "query"
description: "Compute and show shared size as a `SharedSize` field on each image."
type: "boolean"
default: false
- name: "digests"
in: "query"
description: "Show digest information as a `RepoDigests` field on each image."
type: "boolean"
default: false
tags: ["Image"]
/build:
post:
summary: "Build an image"
description: |
Build an image from a tar archive with a `Dockerfile` in it.
The `Dockerfile` specifies how the image is built from the tar archive. It is typically in the archive's root, but can be at a different path or have a different name by specifying the `dockerfile` parameter. [See the `Dockerfile` reference for more information](https://docs.docker.com/engine/reference/builder/).
The Docker daemon performs a preliminary validation of the `Dockerfile` before starting the build, and returns an error if the syntax is incorrect. After that, each instruction is run one-by-one until the ID of the new image is output.
The build is canceled if the client drops the connection by quitting or being killed.
operationId: "ImageBuild"
consumes:
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "inputStream"
in: "body"
description: "A tar archive compressed with one of the following algorithms: identity (no compression), gzip, bzip2, xz."
schema:
type: "string"
format: "binary"
- name: "dockerfile"
in: "query"
description: "Path within the build context to the `Dockerfile`. This is ignored if `remote` is specified and points to an external `Dockerfile`."
type: "string"
default: "Dockerfile"
- name: "t"
in: "query"
description: "A name and optional tag to apply to the image in the `name:tag` format. If you omit the tag the default `latest` value is assumed. You can provide several `t` parameters."
type: "string"
- name: "extrahosts"
in: "query"
description: "Extra hosts to add to /etc/hosts"
type: "string"
- name: "remote"
in: "query"
description: "A Git repository URI or HTTP/HTTPS context URI. If the URI points to a single text file, the file’s contents are placed into a file called `Dockerfile` and the image is built from that file. If the URI points to a tarball, the file is downloaded by the daemon and the contents therein used as the context for the build. If the URI points to a tarball and the `dockerfile` parameter is also specified, there must be a file with the corresponding path inside the tarball."
type: "string"
- name: "q"
in: "query"
description: "Suppress verbose build output."
type: "boolean"
default: false
- name: "nocache"
in: "query"
description: "Do not use the cache when building the image."
type: "boolean"
default: false
- name: "cachefrom"
in: "query"
description: "JSON array of images used for build cache resolution."
type: "string"
- name: "pull"
in: "query"
description: "Attempt to pull the image even if an older image exists locally."
type: "string"
- name: "rm"
in: "query"
description: "Remove intermediate containers after a successful build."
type: "boolean"
default: true
- name: "forcerm"
in: "query"
description: "Always remove intermediate containers, even upon failure."
type: "boolean"
default: false
- name: "memory"
in: "query"
description: "Set memory limit for build."
type: "integer"
- name: "memswap"
in: "query"
description: "Total memory (memory + swap). Set as `-1` to disable swap."
type: "integer"
- name: "cpushares"
in: "query"
description: "CPU shares (relative weight)."
type: "integer"
- name: "cpusetcpus"
in: "query"
description: "CPUs in which to allow execution (e.g., `0-3`, `0,1`)."
type: "string"
- name: "cpuperiod"
in: "query"
description: "The length of a CPU period in microseconds."
type: "integer"
- name: "cpuquota"
in: "query"
description: "Microseconds of CPU time that the container can get in a CPU period."
type: "integer"
- name: "buildargs"
in: "query"
description: >
JSON map of string pairs for build-time variables. Users pass these values at build-time. Docker
uses the buildargs as the environment context for commands run via the `Dockerfile` RUN
instruction, or for variable expansion in other `Dockerfile` instructions. This is not meant for
passing secret values.
For example, the build arg `FOO=bar` would become `{"FOO":"bar"}` in JSON. This would result in the
query parameter `buildargs={"FOO":"bar"}`. Note that `{"FOO":"bar"}` should be URI component encoded.
[Read more about the buildargs instruction.](https://docs.docker.com/engine/reference/builder/#arg)
type: "string"
- name: "shmsize"
in: "query"
description: "Size of `/dev/shm` in bytes. The size must be greater than 0. If omitted the system uses 64MB."
type: "integer"
- name: "squash"
in: "query"
description: "Squash the resulting images layers into a single layer. *(Experimental release only.)*"
type: "boolean"
- name: "labels"
in: "query"
description: "Arbitrary key/value labels to set on the image, as a JSON map of string pairs."
type: "string"
- name: "networkmode"
in: "query"
description: |
Sets the networking mode for the run commands during build. Supported
standard values are: `bridge`, `host`, `none`, and `container:<name|id>`.
Any other value is taken as a custom network's name or ID to which this
container should connect to.
type: "string"
- name: "Content-type"
in: "header"
type: "string"
enum:
- "application/x-tar"
default: "application/x-tar"
- name: "X-Registry-Config"
in: "header"
description: |
This is a base64-encoded JSON object with auth configurations for multiple registries that a build may refer to.
The key is a registry URL, and the value is an auth configuration object, [as described in the authentication section](#section/Authentication). For example:
```
{
"docker.example.com": {
"username": "janedoe",
"password": "hunter2"
},
"https://index.docker.io/v1/": {
"username": "mobydock",
"password": "conta1n3rize14"
}
}
```
Only the registry domain name (and port if not the default 443) are required. However, for legacy reasons, the Docker Hub registry must be specified with both a `https://` prefix and a `/v1/` suffix even though Docker will prefer to use the v2 registry API.
type: "string"
- name: "platform"
in: "query"
description: "Platform in the format os[/arch[/variant]]"
type: "string"
default: ""
- name: "target"
in: "query"
description: "Target build stage"
type: "string"
default: ""
- name: "outputs"
in: "query"
description: "BuildKit output configuration"
type: "string"
default: ""
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/build/prune:
post:
summary: "Delete builder cache"
produces:
- "application/json"
operationId: "BuildPrune"
parameters:
- name: "keep-storage"
in: "query"
description: "Amount of disk space in bytes to keep for cache"
type: "integer"
format: "int64"
- name: "all"
in: "query"
type: "boolean"
description: "Remove all types of build cache"
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the list of build cache objects.
Available filters:
- `until=<duration>`: duration relative to daemon's time, during which build cache was not used, in Go's duration format (e.g., '24h')
- `id=<id>`
- `parent=<id>`
- `type=<string>`
- `description=<string>`
- `inuse`
- `shared`
- `private`
responses:
200:
description: "No error"
schema:
type: "object"
title: "BuildPruneResponse"
properties:
CachesDeleted:
type: "array"
items:
description: "ID of build cache object"
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/images/create:
post:
summary: "Create an image"
description: "Create an image by either pulling it from a registry or importing it."
operationId: "ImageCreate"
consumes:
- "text/plain"
- "application/octet-stream"
produces:
- "application/json"
responses:
200:
description: "no error"
404:
description: "repository does not exist or no read access"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "fromImage"
in: "query"
description: "Name of the image to pull. The name may include a tag or digest. This parameter may only be used when pulling an image. The pull is cancelled if the HTTP connection is closed."
type: "string"
- name: "fromSrc"
in: "query"
description: "Source to import. The value may be a URL from which the image can be retrieved or `-` to read the image from the request body. This parameter may only be used when importing an image."
type: "string"
- name: "repo"
in: "query"
description: "Repository name given to an image when it is imported. The repo may include a tag. This parameter may only be used when importing an image."
type: "string"
- name: "tag"
in: "query"
description: "Tag or digest. If empty when pulling an image, this causes all tags for the given image to be pulled."
type: "string"
- name: "message"
in: "query"
description: "Set commit message for imported image."
type: "string"
- name: "inputImage"
in: "body"
description: "Image content if the value `-` has been specified in fromSrc query parameter"
schema:
type: "string"
required: false
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "changes"
in: "query"
description: |
Apply `Dockerfile` instructions to the image that is created,
for example: `changes=ENV DEBUG=true`.
Note that `ENV DEBUG=true` should be URI component encoded.
Supported `Dockerfile` instructions:
`CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
type: "array"
items:
type: "string"
- name: "platform"
in: "query"
description: |
Platform in the format os[/arch[/variant]].
When used in combination with the `fromImage` option, the daemon checks
if the given image is present in the local image cache with the given
OS and Architecture, and otherwise attempts to pull the image. If the
option is not set, the host's native OS and Architecture are used.
If the given image does not exist in the local image cache, the daemon
attempts to pull the image with the host's native OS and Architecture.
If the given image does exists in the local image cache, but its OS or
architecture does not match, a warning is produced.
When used with the `fromSrc` option to import an image from an archive,
this option sets the platform information for the imported image. If
the option is not set, the host's native OS and Architecture are used
for the imported image.
type: "string"
default: ""
tags: ["Image"]
/images/{name}/json:
get:
summary: "Inspect an image"
description: "Return low-level information about an image."
operationId: "ImageInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/ImageInspect"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Image"]
/images/{name}/history:
get:
summary: "Get the history of an image"
description: "Return parent layers of an image."
operationId: "ImageHistory"
produces: ["application/json"]
responses:
200:
description: "List of image layers"
schema:
type: "array"
items:
type: "object"
x-go-name: HistoryResponseItem
title: "HistoryResponseItem"
description: "individual image layer information in response to ImageHistory operation"
required: [Id, Created, CreatedBy, Tags, Size, Comment]
properties:
Id:
type: "string"
x-nullable: false
Created:
type: "integer"
format: "int64"
x-nullable: false
CreatedBy:
type: "string"
x-nullable: false
Tags:
type: "array"
items:
type: "string"
Size:
type: "integer"
format: "int64"
x-nullable: false
Comment:
type: "string"
x-nullable: false
examples:
application/json:
- Id: "3db9c44f45209632d6050b35958829c3a2aa256d81b9a7be45b362ff85c54710"
Created: 1398108230
CreatedBy: "/bin/sh -c #(nop) ADD file:eb15dbd63394e063b805a3c32ca7bf0266ef64676d5a6fab4801f2e81e2a5148 in /"
Tags:
- "ubuntu:lucid"
- "ubuntu:10.04"
Size: 182964289
Comment: ""
- Id: "6cfa4d1f33fb861d4d114f43b25abd0ac737509268065cdfd69d544a59c85ab8"
Created: 1398108222
CreatedBy: "/bin/sh -c #(nop) MAINTAINER Tianon Gravi <[email protected]> - mkimage-debootstrap.sh -i iproute,iputils-ping,ubuntu-minimal -t lucid.tar.xz lucid http://archive.ubuntu.com/ubuntu/"
Tags: []
Size: 0
Comment: ""
- Id: "511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158"
Created: 1371157430
CreatedBy: ""
Tags:
- "scratch12:latest"
- "scratch:latest"
Size: 0
Comment: "Imported from -"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/{name}/push:
post:
summary: "Push an image"
description: |
Push an image to a registry.
If you wish to push an image on to a private registry, that image must
already have a tag which references the registry. For example,
`registry.example.com/myimage:latest`.
The push is cancelled if the HTTP connection is closed.
operationId: "ImagePush"
consumes:
- "application/octet-stream"
responses:
200:
description: "No error"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID."
type: "string"
required: true
- name: "tag"
in: "query"
description: "The tag to associate with the image on the registry."
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
required: true
tags: ["Image"]
/images/{name}/tag:
post:
summary: "Tag an image"
description: "Tag an image so that it becomes part of a repository."
operationId: "ImageTag"
responses:
201:
description: "No error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID to tag."
type: "string"
required: true
- name: "repo"
in: "query"
description: "The repository to tag in. For example, `someuser/someimage`."
type: "string"
- name: "tag"
in: "query"
description: "The name of the new tag."
type: "string"
tags: ["Image"]
/images/{name}:
delete:
summary: "Remove an image"
description: |
Remove an image, along with any untagged parent images that were
referenced by that image.
Images can't be removed if they have descendant images, are being
used by a running container or are being used by a build.
operationId: "ImageDelete"
produces: ["application/json"]
responses:
200:
description: "The image was deleted successfully"
schema:
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
examples:
application/json:
- Untagged: "3e2f21a89f"
- Deleted: "3e2f21a89f"
- Deleted: "53b4f83ac9"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
- name: "force"
in: "query"
description: "Remove the image even if it is being used by stopped containers or has other tags"
type: "boolean"
default: false
- name: "noprune"
in: "query"
description: "Do not delete untagged parent images"
type: "boolean"
default: false
tags: ["Image"]
/images/search:
get:
summary: "Search images"
description: "Search for an image on Docker Hub."
operationId: "ImageSearch"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
type: "object"
title: "ImageSearchResponseItem"
properties:
description:
type: "string"
is_official:
type: "boolean"
is_automated:
type: "boolean"
name:
type: "string"
star_count:
type: "integer"
examples:
application/json:
- description: ""
is_official: false
is_automated: false
name: "wma55/u1210sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "jdswinbank/sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "vgauthier/sshd"
star_count: 0
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "term"
in: "query"
description: "Term to search"
type: "string"
required: true
- name: "limit"
in: "query"
description: "Maximum number of results to return"
type: "integer"
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to process on the images list. Available filters:
- `is-automated=(true|false)`
- `is-official=(true|false)`
- `stars=<number>` Matches images that has at least 'number' stars.
type: "string"
tags: ["Image"]
/images/prune:
post:
summary: "Delete unused images"
produces:
- "application/json"
operationId: "ImagePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`). Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), prune only
unused *and* untagged images. When set to `false`
(or `0`), all unused images are pruned.
- `until=<string>` Prune images created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune images with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ImagePruneResponse"
properties:
ImagesDeleted:
description: "Images that were deleted"
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/auth:
post:
summary: "Check auth configuration"
description: |
Validate credentials for a registry and, if available, get an identity
token for accessing the registry without password.
operationId: "SystemAuth"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "An identity token was generated successfully."
schema:
type: "object"
title: "SystemAuthResponse"
required: [Status]
properties:
Status:
description: "The status of the authentication"
type: "string"
x-nullable: false
IdentityToken:
description: "An opaque token used to authenticate a user after a successful login"
type: "string"
x-nullable: false
examples:
application/json:
Status: "Login Succeeded"
IdentityToken: "9cbaf023786cd7..."
204:
description: "No error"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "authConfig"
in: "body"
description: "Authentication to check"
schema:
$ref: "#/definitions/AuthConfig"
tags: ["System"]
/info:
get:
summary: "Get system information"
operationId: "SystemInfo"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/SystemInfo"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/version:
get:
summary: "Get version"
description: "Returns the version of Docker that is running and various information about the system that Docker is running on."
operationId: "SystemVersion"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/SystemVersion"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/_ping:
get:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPing"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "OK"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
headers:
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
tags: ["System"]
head:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPingHead"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "(empty)"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/commit:
post:
summary: "Create a new image from a container"
operationId: "ImageCommit"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "containerConfig"
in: "body"
description: "The container configuration"
schema:
$ref: "#/definitions/ContainerConfig"
- name: "container"
in: "query"
description: "The ID or name of the container to commit"
type: "string"
- name: "repo"
in: "query"
description: "Repository name for the created image"
type: "string"
- name: "tag"
in: "query"
description: "Tag name for the create image"
type: "string"
- name: "comment"
in: "query"
description: "Commit message"
type: "string"
- name: "author"
in: "query"
description: "Author of the image (e.g., `John Hannibal Smith <[email protected]>`)"
type: "string"
- name: "pause"
in: "query"
description: "Whether to pause the container before committing"
type: "boolean"
default: true
- name: "changes"
in: "query"
description: "`Dockerfile` instructions to apply while committing"
type: "string"
tags: ["Image"]
/events:
get:
summary: "Monitor events"
description: |
Stream real-time events from the server.
Various objects within Docker report events when something happens to them.
Containers report these events: `attach`, `commit`, `copy`, `create`, `destroy`, `detach`, `die`, `exec_create`, `exec_detach`, `exec_start`, `exec_die`, `export`, `health_status`, `kill`, `oom`, `pause`, `rename`, `resize`, `restart`, `start`, `stop`, `top`, `unpause`, `update`, and `prune`
Images report these events: `delete`, `import`, `load`, `pull`, `push`, `save`, `tag`, `untag`, and `prune`
Volumes report these events: `create`, `mount`, `unmount`, `destroy`, and `prune`
Networks report these events: `create`, `connect`, `disconnect`, `destroy`, `update`, `remove`, and `prune`
The Docker daemon reports these events: `reload`
Services report these events: `create`, `update`, and `remove`
Nodes report these events: `create`, `update`, and `remove`
Secrets report these events: `create`, `update`, and `remove`
Configs report these events: `create`, `update`, and `remove`
The Builder reports `prune` events
operationId: "SystemEvents"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/EventMessage"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "since"
in: "query"
description: "Show events created since this timestamp then stream new events."
type: "string"
- name: "until"
in: "query"
description: "Show events created until this timestamp then stop streaming."
type: "string"
- name: "filters"
in: "query"
description: |
A JSON encoded value of filters (a `map[string][]string`) to process on the event list. Available filters:
- `config=<string>` config name or ID
- `container=<string>` container name or ID
- `daemon=<string>` daemon name or ID
- `event=<string>` event type
- `image=<string>` image name or ID
- `label=<string>` image or container label
- `network=<string>` network name or ID
- `node=<string>` node ID
- `plugin`=<string> plugin name or ID
- `scope`=<string> local or swarm
- `secret=<string>` secret name or ID
- `service=<string>` service name or ID
- `type=<string>` object to filter by, one of `container`, `image`, `volume`, `network`, `daemon`, `plugin`, `node`, `service`, `secret` or `config`
- `volume=<string>` volume name
type: "string"
tags: ["System"]
/system/df:
get:
summary: "Get data usage information"
operationId: "SystemDataUsage"
responses:
200:
description: "no error"
schema:
type: "object"
title: "SystemDataUsageResponse"
properties:
LayersSize:
type: "integer"
format: "int64"
Images:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
Containers:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
Volumes:
type: "array"
items:
$ref: "#/definitions/Volume"
BuildCache:
type: "array"
items:
$ref: "#/definitions/BuildCache"
example:
LayersSize: 1092588
Images:
-
Id: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
ParentId: ""
RepoTags:
- "busybox:latest"
RepoDigests:
- "busybox@sha256:a59906e33509d14c036c8678d687bd4eec81ed7c4b8ce907b888c607f6a1e0e6"
Created: 1466724217
Size: 1092588
SharedSize: 0
VirtualSize: 1092588
Labels: {}
Containers: 1
Containers:
-
Id: "e575172ed11dc01bfce087fb27bee502db149e1a0fad7c296ad300bbff178148"
Names:
- "/top"
Image: "busybox"
ImageID: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
Command: "top"
Created: 1472592424
Ports: []
SizeRootFs: 1092588
Labels: {}
State: "exited"
Status: "Exited (0) 56 minutes ago"
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
IPAMConfig: null
Links: null
Aliases: null
NetworkID: "d687bc59335f0e5c9ee8193e5612e8aee000c8c62ea170cfb99c098f95899d92"
EndpointID: "8ed5115aeaad9abb174f68dcf135b49f11daf597678315231a32ca28441dec6a"
Gateway: "172.18.0.1"
IPAddress: "172.18.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Mounts: []
Volumes:
-
Name: "my-volume"
Driver: "local"
Mountpoint: "/var/lib/docker/volumes/my-volume/_data"
Labels: null
Scope: "local"
Options: null
UsageData:
Size: 10920104
RefCount: 2
BuildCache:
-
ID: "hw53o5aio51xtltp5xjp8v7fx"
Parent: ""
Type: "regular"
Description: "pulled from docker.io/library/debian@sha256:234cb88d3020898631af0ccbbcca9a66ae7306ecd30c9720690858c1b007d2a0"
InUse: false
Shared: true
Size: 0
CreatedAt: "2021-06-28T13:31:01.474619385Z"
LastUsedAt: "2021-07-07T22:02:32.738075951Z"
UsageCount: 26
-
ID: "ndlpt0hhvkqcdfkputsk4cq9c"
Parent: "hw53o5aio51xtltp5xjp8v7fx"
Type: "regular"
Description: "mount / from exec /bin/sh -c echo 'Binary::apt::APT::Keep-Downloaded-Packages \"true\";' > /etc/apt/apt.conf.d/keep-cache"
InUse: false
Shared: true
Size: 51
CreatedAt: "2021-06-28T13:31:03.002625487Z"
LastUsedAt: "2021-07-07T22:02:32.773909517Z"
UsageCount: 26
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "type"
in: "query"
description: |
Object types, for which to compute and return data.
type: "array"
collectionFormat: multi
items:
type: "string"
enum: ["container", "image", "volume", "build-cache"]
tags: ["System"]
/images/{name}/get:
get:
summary: "Export an image"
description: |
Get a tarball containing all images and metadata for a repository.
If `name` is a specific name and tag (e.g. `ubuntu:latest`), then only that image (and its parents) are returned. If `name` is an image ID, similarly only that image (and its parents) are returned, but with the exclusion of the `repositories` file in the tarball, as there were no image names referenced.
### Image tarball format
An image tarball contains one directory per image layer (named using its long ID), each containing these files:
- `VERSION`: currently `1.0` - the file format version
- `json`: detailed layer information, similar to `docker inspect layer_id`
- `layer.tar`: A tarfile containing the filesystem changes in this layer
The `layer.tar` file contains `aufs` style `.wh..wh.aufs` files and directories for storing attribute changes and deletions.
If the tarball defines a repository, the tarball should also include a `repositories` file at the root that contains a list of repository and tag names mapped to layer IDs.
```json
{
"hello-world": {
"latest": "565a9d68a73f6706862bfe8409a7f659776d4d60a8d096eb4a3cbce6999cc2a1"
}
}
```
operationId: "ImageGet"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/get:
get:
summary: "Export several images"
description: |
Get a tarball containing all images and metadata for several image
repositories.
For each value of the `names` parameter: if it is a specific name and
tag (e.g. `ubuntu:latest`), then only that image (and its parents) are
returned; if it is an image ID, similarly only that image (and its parents)
are returned and there would be no names referenced in the 'repositories'
file for this image ID.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageGetAll"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "names"
in: "query"
description: "Image names to filter by"
type: "array"
items:
type: "string"
tags: ["Image"]
/images/load:
post:
summary: "Import images"
description: |
Load a set of images and tags into a repository.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageLoad"
consumes:
- "application/x-tar"
produces:
- "application/json"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "imagesTarball"
in: "body"
description: "Tar archive containing images"
schema:
type: "string"
format: "binary"
- name: "quiet"
in: "query"
description: "Suppress progress details during load."
type: "boolean"
default: false
tags: ["Image"]
/containers/{id}/exec:
post:
summary: "Create an exec instance"
description: "Run a command inside a running container."
operationId: "ContainerExec"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is paused"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execConfig"
in: "body"
description: "Exec configuration"
schema:
type: "object"
title: "ExecConfig"
properties:
AttachStdin:
type: "boolean"
description: "Attach to `stdin` of the exec command."
AttachStdout:
type: "boolean"
description: "Attach to `stdout` of the exec command."
AttachStderr:
type: "boolean"
description: "Attach to `stderr` of the exec command."
DetachKeys:
type: "string"
description: |
Override the key sequence for detaching a container. Format is
a single character `[a-Z]` or `ctrl-<value>` where `<value>`
is one of: `a-z`, `@`, `^`, `[`, `,` or `_`.
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
Env:
description: |
A list of environment variables in the form `["VAR=value", ...]`.
type: "array"
items:
type: "string"
Cmd:
type: "array"
description: "Command to run, as a string or array of strings."
items:
type: "string"
Privileged:
type: "boolean"
description: "Runs the exec process with extended privileges."
default: false
User:
type: "string"
description: |
The user, and optionally, group to run the exec process inside
the container. Format is one of: `user`, `user:group`, `uid`,
or `uid:gid`.
WorkingDir:
type: "string"
description: |
The working directory for the exec process inside the container.
example:
AttachStdin: false
AttachStdout: true
AttachStderr: true
DetachKeys: "ctrl-p,ctrl-q"
Tty: false
Cmd:
- "date"
Env:
- "FOO=bar"
- "BAZ=quux"
required: true
- name: "id"
in: "path"
description: "ID or name of container"
type: "string"
required: true
tags: ["Exec"]
/exec/{id}/start:
post:
summary: "Start an exec instance"
description: |
Starts a previously set up exec instance. If detach is true, this endpoint
returns immediately after starting the command. Otherwise, it sets up an
interactive session with the command.
operationId: "ExecStart"
consumes:
- "application/json"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "No error"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Container is stopped or paused"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execStartConfig"
in: "body"
schema:
type: "object"
title: "ExecStartConfig"
properties:
Detach:
type: "boolean"
description: "Detach from the command."
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
example:
Detach: false
Tty: false
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/exec/{id}/resize:
post:
summary: "Resize an exec instance"
description: |
Resize the TTY session used by an exec instance. This endpoint only works
if `tty` was specified as part of creating and starting the exec instance.
operationId: "ExecResize"
responses:
200:
description: "No error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Exec"]
/exec/{id}/json:
get:
summary: "Inspect an exec instance"
description: "Return low-level information about an exec instance."
operationId: "ExecInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ExecInspectResponse"
properties:
CanRemove:
type: "boolean"
DetachKeys:
type: "string"
ID:
type: "string"
Running:
type: "boolean"
ExitCode:
type: "integer"
ProcessConfig:
$ref: "#/definitions/ProcessConfig"
OpenStdin:
type: "boolean"
OpenStderr:
type: "boolean"
OpenStdout:
type: "boolean"
ContainerID:
type: "string"
Pid:
type: "integer"
description: "The system process ID for the exec process."
examples:
application/json:
CanRemove: false
ContainerID: "b53ee82b53a40c7dca428523e34f741f3abc51d9f297a14ff874bf761b995126"
DetachKeys: ""
ExitCode: 2
ID: "f33bbfb39f5b142420f4759b2348913bd4a8d1a6d7fd56499cb41a1bb91d7b3b"
OpenStderr: true
OpenStdin: true
OpenStdout: true
ProcessConfig:
arguments:
- "-c"
- "exit 2"
entrypoint: "sh"
privileged: false
tty: true
user: "1000"
Running: false
Pid: 42000
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/volumes:
get:
summary: "List volumes"
operationId: "VolumeList"
produces: ["application/json"]
responses:
200:
description: "Summary volume data that matches the query"
schema:
$ref: "#/definitions/VolumeListResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to
process on the volumes list. Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
volumes that are not in use by a container. When set to `false`
(or `0`), only volumes that are in use by one or more
containers are returned.
- `driver=<volume-driver-name>` Matches volumes based on their driver.
- `label=<key>` or `label=<key>:<value>` Matches volumes based on
the presence of a `label` alone or a `label` and a value.
- `name=<volume-name>` Matches all or part of a volume name.
type: "string"
format: "json"
tags: ["Volume"]
/volumes/create:
post:
summary: "Create a volume"
operationId: "VolumeCreate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
201:
description: "The volume was created successfully"
schema:
$ref: "#/definitions/Volume"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "volumeConfig"
in: "body"
required: true
description: "Volume configuration"
schema:
$ref: "#/definitions/VolumeCreateOptions"
tags: ["Volume"]
/volumes/{name}:
get:
summary: "Inspect a volume"
operationId: "VolumeInspect"
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Volume"
404:
description: "No such volume"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
tags: ["Volume"]
delete:
summary: "Remove a volume"
description: "Instruct the driver to remove the volume."
operationId: "VolumeDelete"
responses:
204:
description: "The volume was removed"
404:
description: "No such volume or volume driver"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Volume is in use and cannot be removed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
- name: "force"
in: "query"
description: "Force the removal of the volume"
type: "boolean"
default: false
tags: ["Volume"]
/volumes/prune:
post:
summary: "Delete unused volumes"
produces:
- "application/json"
operationId: "VolumePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune volumes with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "VolumePruneResponse"
properties:
VolumesDeleted:
description: "Volumes that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Volume"]
/networks:
get:
summary: "List networks"
description: |
Returns a list of networks. For details on the format, see the
[network inspect endpoint](#operation/NetworkInspect).
Note that it uses a different, smaller representation of a network than
inspecting a single network. For example, the list of containers attached
to the network is not propagated in API versions 1.28 and up.
operationId: "NetworkList"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Network"
examples:
application/json:
- Name: "bridge"
Id: "f2de39df4171b0dc801e8002d1d999b77256983dfc63041c0f34030aa3977566"
Created: "2016-10-19T06:21:00.416543526Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config:
-
Subnet: "172.17.0.0/16"
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
- Name: "none"
Id: "e086a3893b05ab69242d3c44e49483a3bbbd3a26b46baa8f61ab797c1088d794"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "null"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
- Name: "host"
Id: "13e871235c677f196c4e1ecebb9dc733b9b2d2ab589e30c539efeda84a24215e"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "host"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to process
on the networks list.
Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
networks that are not in use by a container. When set to `false`
(or `0`), only networks that are in use by one or more
containers are returned.
- `driver=<driver-name>` Matches a network's driver.
- `id=<network-id>` Matches all or part of a network ID.
- `label=<key>` or `label=<key>=<value>` of a network label.
- `name=<network-name>` Matches all or part of a network name.
- `scope=["swarm"|"global"|"local"]` Filters networks by scope (`swarm`, `global`, or `local`).
- `type=["custom"|"builtin"]` Filters networks by type. The `custom` keyword returns all user-defined networks.
type: "string"
tags: ["Network"]
/networks/{id}:
get:
summary: "Inspect a network"
operationId: "NetworkInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Network"
404:
description: "Network not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "verbose"
in: "query"
description: "Detailed inspect output for troubleshooting"
type: "boolean"
default: false
- name: "scope"
in: "query"
description: "Filter the network by scope (swarm, global, or local)"
type: "string"
tags: ["Network"]
delete:
summary: "Remove a network"
operationId: "NetworkDelete"
responses:
204:
description: "No error"
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such network"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
tags: ["Network"]
/networks/create:
post:
summary: "Create a network"
operationId: "NetworkCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "No error"
schema:
type: "object"
title: "NetworkCreateResponse"
properties:
Id:
description: "The ID of the created network."
type: "string"
Warning:
type: "string"
example:
Id: "22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30"
Warning: ""
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "plugin not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "networkConfig"
in: "body"
description: "Network configuration"
required: true
schema:
type: "object"
title: "NetworkCreateRequest"
required: ["Name"]
properties:
Name:
description: "The network's name."
type: "string"
CheckDuplicate:
description: |
Check for networks with duplicate names. Since Network is
primarily keyed based on a random ID and not on the name, and
network name is strictly a user-friendly alias to the network
which is uniquely identified using ID, there is no guaranteed
way to check for duplicates. CheckDuplicate is there to provide
a best effort checking of any networks which has the same name
but it is not guaranteed to catch all name collisions.
type: "boolean"
Driver:
description: "Name of the network driver plugin to use."
type: "string"
default: "bridge"
Internal:
description: "Restrict external access to the network."
type: "boolean"
Attachable:
description: |
Globally scoped network is manually attachable by regular
containers from workers in swarm mode.
type: "boolean"
Ingress:
description: |
Ingress network is the network which provides the routing-mesh
in swarm mode.
type: "boolean"
IPAM:
description: "Optional custom IP scheme for the network."
$ref: "#/definitions/IPAM"
EnableIPv6:
description: "Enable IPv6 on the network."
type: "boolean"
Options:
description: "Network specific options to be used by the drivers."
type: "object"
additionalProperties:
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
Name: "isolated_nw"
CheckDuplicate: false
Driver: "bridge"
EnableIPv6: true
IPAM:
Driver: "default"
Config:
- Subnet: "172.20.0.0/16"
IPRange: "172.20.10.0/24"
Gateway: "172.20.10.11"
- Subnet: "2001:db8:abcd::/64"
Gateway: "2001:db8:abcd::1011"
Options:
foo: "bar"
Internal: true
Attachable: false
Ingress: false
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
tags: ["Network"]
/networks/{id}/connect:
post:
summary: "Connect a container to a network"
operationId: "NetworkConnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkConnectRequest"
properties:
Container:
type: "string"
description: "The ID or name of the container to connect to the network."
EndpointConfig:
$ref: "#/definitions/EndpointSettings"
example:
Container: "3613f73ba0e4"
EndpointConfig:
IPAMConfig:
IPv4Address: "172.24.56.89"
IPv6Address: "2001:db8::5689"
tags: ["Network"]
/networks/{id}/disconnect:
post:
summary: "Disconnect a container from a network"
operationId: "NetworkDisconnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkDisconnectRequest"
properties:
Container:
type: "string"
description: |
The ID or name of the container to disconnect from the network.
Force:
type: "boolean"
description: |
Force the container to disconnect from the network.
tags: ["Network"]
/networks/prune:
post:
summary: "Delete unused networks"
produces:
- "application/json"
operationId: "NetworkPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune networks created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune networks with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "NetworkPruneResponse"
properties:
NetworksDeleted:
description: "Networks that were deleted"
type: "array"
items:
type: "string"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Network"]
/plugins:
get:
summary: "List plugins"
operationId: "PluginList"
description: "Returns information about installed plugins."
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Plugin"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the plugin list.
Available filters:
- `capability=<capability name>`
- `enable=<true>|<false>`
tags: ["Plugin"]
/plugins/privileges:
get:
summary: "Get plugin privileges"
operationId: "GetPluginPrivileges"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags:
- "Plugin"
/plugins/pull:
post:
summary: "Install a plugin"
operationId: "PluginPull"
description: |
Pulls and installs a plugin. After the plugin is installed, it can be
enabled using the [`POST /plugins/{name}/enable` endpoint](#operation/PostPluginsEnable).
produces:
- "application/json"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
Remote reference for plugin to install.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "name"
in: "query"
description: |
Local name for the pulled plugin.
The `:latest` tag is optional, and is used as the default if omitted.
required: false
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/{name}/json:
get:
summary: "Inspect a plugin"
operationId: "PluginInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}:
delete:
summary: "Remove a plugin"
operationId: "PluginDelete"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "force"
in: "query"
description: |
Disable the plugin before removing. This may result in issues if the
plugin is in use by a container.
type: "boolean"
default: false
tags: ["Plugin"]
/plugins/{name}/enable:
post:
summary: "Enable a plugin"
operationId: "PluginEnable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "timeout"
in: "query"
description: "Set the HTTP client timeout (in seconds)"
type: "integer"
default: 0
tags: ["Plugin"]
/plugins/{name}/disable:
post:
summary: "Disable a plugin"
operationId: "PluginDisable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}/upgrade:
post:
summary: "Upgrade a plugin"
operationId: "PluginUpgrade"
responses:
204:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "remote"
in: "query"
description: |
Remote reference to upgrade to.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/create:
post:
summary: "Create a plugin"
operationId: "PluginCreate"
consumes:
- "application/x-tar"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "tarContext"
in: "body"
description: "Path to tar containing plugin rootfs and manifest"
schema:
type: "string"
format: "binary"
tags: ["Plugin"]
/plugins/{name}/push:
post:
summary: "Push a plugin"
operationId: "PluginPush"
description: |
Push a plugin to the registry.
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
responses:
200:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/plugins/{name}/set:
post:
summary: "Configure a plugin"
operationId: "PluginSet"
consumes:
- "application/json"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
type: "string"
example: ["DEBUG=1"]
responses:
204:
description: "No error"
404:
description: "Plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/nodes:
get:
summary: "List nodes"
operationId: "NodeList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Node"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the nodes list, encoded as JSON (a `map[string][]string`).
Available filters:
- `id=<node id>`
- `label=<engine label>`
- `membership=`(`accepted`|`pending`)`
- `name=<node name>`
- `node.label=<node label>`
- `role=`(`manager`|`worker`)`
type: "string"
tags: ["Node"]
/nodes/{id}:
get:
summary: "Inspect a node"
operationId: "NodeInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Node"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
tags: ["Node"]
delete:
summary: "Delete a node"
operationId: "NodeDelete"
responses:
200:
description: "no error"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
- name: "force"
in: "query"
description: "Force remove a node from the swarm"
default: false
type: "boolean"
tags: ["Node"]
/nodes/{id}/update:
post:
summary: "Update a node"
operationId: "NodeUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID of the node"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/NodeSpec"
- name: "version"
in: "query"
description: |
The version number of the node object being updated. This is required
to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Node"]
/swarm:
get:
summary: "Inspect swarm"
operationId: "SwarmInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Swarm"
404:
description: "no such swarm"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/init:
post:
summary: "Initialize a new swarm"
operationId: "SwarmInit"
produces:
- "application/json"
- "text/plain"
responses:
200:
description: "no error"
schema:
description: "The node ID"
type: "string"
example: "7v2t30z9blmxuhnyo6s4cpenp"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmInitRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication, as well
as determining the networking interface used for the VXLAN
Tunnel Endpoint (VTEP). This can either be an address/port
combination in the form `192.168.1.1:4567`, or an interface
followed by a port number, like `eth0:4567`. If the port number
is omitted, the default swarm listening port is used.
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
if no port is set or is set to 0, default port 4789 will be used.
type: "integer"
format: "uint32"
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global
scope networks.
type: "array"
items:
type: "string"
example: ["10.10.0.0/16", "20.20.0.0/16"]
ForceNewCluster:
description: "Force creation of a new swarm."
type: "boolean"
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created
from the default subnet pool.
type: "integer"
format: "uint32"
Spec:
$ref: "#/definitions/SwarmSpec"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
DataPathPort: 4789
DefaultAddrPool: ["10.10.0.0/8", "20.20.0.0/8"]
SubnetSize: 24
ForceNewCluster: false
Spec:
Orchestration: {}
Raft: {}
Dispatcher: {}
CAConfig: {}
EncryptionConfig:
AutoLockManagers: false
tags: ["Swarm"]
/swarm/join:
post:
summary: "Join an existing swarm"
operationId: "SwarmJoin"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmJoinRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication if the node
gets promoted to manager, as well as determining the networking
interface used for the VXLAN Tunnel Endpoint (VTEP).
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
RemoteAddrs:
description: |
Addresses of manager nodes already participating in the swarm.
type: "array"
items:
type: "string"
JoinToken:
description: "Secret token for joining this swarm."
type: "string"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
RemoteAddrs:
- "node1:2377"
JoinToken: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
tags: ["Swarm"]
/swarm/leave:
post:
summary: "Leave a swarm"
operationId: "SwarmLeave"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "force"
description: |
Force leave swarm, even if this is the last manager or that it will
break the cluster.
in: "query"
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/update:
post:
summary: "Update a swarm"
operationId: "SwarmUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
$ref: "#/definitions/SwarmSpec"
- name: "version"
in: "query"
description: |
The version number of the swarm object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
- name: "rotateWorkerToken"
in: "query"
description: "Rotate the worker join token."
type: "boolean"
default: false
- name: "rotateManagerToken"
in: "query"
description: "Rotate the manager join token."
type: "boolean"
default: false
- name: "rotateManagerUnlockKey"
in: "query"
description: "Rotate the manager unlock key."
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/unlockkey:
get:
summary: "Get the unlock key"
operationId: "SwarmUnlockkey"
consumes:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "UnlockKeyResponse"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/unlock:
post:
summary: "Unlock a locked manager"
operationId: "SwarmUnlock"
consumes:
- "application/json"
produces:
- "application/json"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmUnlockRequest"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/services:
get:
summary: "List services"
operationId: "ServiceList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Service"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the services list.
Available filters:
- `id=<service id>`
- `label=<service label>`
- `mode=["replicated"|"global"]`
- `name=<service name>`
- name: "status"
in: "query"
type: "boolean"
description: |
Include service status, with count of running and desired tasks.
tags: ["Service"]
/services/create:
post:
summary: "Create a service"
operationId: "ServiceCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
type: "object"
title: "ServiceCreateResponse"
properties:
ID:
description: "The ID of the created service."
type: "string"
Warning:
description: "Optional warning message"
type: "string"
example:
ID: "ak7w3gjqoa3kuz8xcpnyy0pvl"
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
403:
description: "network is not eligible for services"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "name conflicts with an existing service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "web"
TaskTemplate:
ContainerSpec:
Image: "nginx:alpine"
Mounts:
-
ReadOnly: true
Source: "web-data"
Target: "/usr/share/nginx/html"
Type: "volume"
VolumeOptions:
DriverConfig: {}
Labels:
com.example.something: "something-value"
Hosts: ["10.10.10.10 host1", "ABCD:EF01:2345:6789:ABCD:EF01:2345:6789 host2"]
User: "33"
DNSConfig:
Nameservers: ["8.8.8.8"]
Search: ["example.org"]
Options: ["timeout:3"]
Secrets:
-
File:
Name: "www.example.org.key"
UID: "33"
GID: "33"
Mode: 384
SecretID: "fpjqlhnwb19zds35k8wn80lq9"
SecretName: "example_org_domain_key"
LogDriver:
Name: "json-file"
Options:
max-file: "3"
max-size: "10M"
Placement: {}
Resources:
Limits:
MemoryBytes: 104857600
Reservations: {}
RestartPolicy:
Condition: "on-failure"
Delay: 10000000000
MaxAttempts: 10
Mode:
Replicated:
Replicas: 4
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Ports:
-
Protocol: "tcp"
PublishedPort: 8080
TargetPort: 80
Labels:
foo: "bar"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}:
get:
summary: "Inspect a service"
operationId: "ServiceInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Service"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "insertDefaults"
in: "query"
description: "Fill empty fields with default values."
type: "boolean"
default: false
tags: ["Service"]
delete:
summary: "Delete a service"
operationId: "ServiceDelete"
responses:
200:
description: "no error"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
tags: ["Service"]
/services/{id}/update:
post:
summary: "Update a service"
operationId: "ServiceUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/ServiceUpdateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "top"
TaskTemplate:
ContainerSpec:
Image: "busybox"
Args:
- "top"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
- name: "version"
in: "query"
description: |
The version number of the service object being updated. This is
required to avoid conflicting writes.
This version number should be the value as currently set on the
service *before* the update. You can find the current version by
calling `GET /services/{id}`
required: true
type: "integer"
- name: "registryAuthFrom"
in: "query"
description: |
If the `X-Registry-Auth` header is not specified, this parameter
indicates where to find registry authorization credentials.
type: "string"
enum: ["spec", "previous-spec"]
default: "spec"
- name: "rollback"
in: "query"
description: |
Set to this parameter to `previous` to cause a server-side rollback
to the previous service spec. The supplied spec will be ignored in
this case.
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}/logs:
get:
summary: "Get service logs"
description: |
Get `stdout` and `stderr` logs from a service. See also
[`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ServiceLogs"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such service: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the service"
type: "string"
- name: "details"
in: "query"
description: "Show service context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Service"]
/tasks:
get:
summary: "List tasks"
operationId: "TaskList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Task"
example:
- ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
- ID: "1yljwbmlr8er2waf8orvqpwms"
Version:
Index: 30
CreatedAt: "2016-06-07T21:07:30.019104782Z"
UpdatedAt: "2016-06-07T21:07:30.231958098Z"
Name: "hopeful_cori"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:30.202183143Z"
State: "shutdown"
Message: "shutdown"
ContainerStatus:
ContainerID: "1cf8d63d18e79668b0004a4be4c6ee58cddfad2dae29506d8781581d0688a213"
DesiredState: "shutdown"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.5/16"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the tasks list.
Available filters:
- `desired-state=(running | shutdown | accepted)`
- `id=<task id>`
- `label=key` or `label="key=value"`
- `name=<task name>`
- `node=<node id or name>`
- `service=<service name>`
tags: ["Task"]
/tasks/{id}:
get:
summary: "Inspect a task"
operationId: "TaskInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Task"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID of the task"
required: true
type: "string"
tags: ["Task"]
/tasks/{id}/logs:
get:
summary: "Get task logs"
description: |
Get `stdout` and `stderr` logs from a task.
See also [`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
operationId: "TaskLogs"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such task: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID of the task"
type: "string"
- name: "details"
in: "query"
description: "Show task context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Task"]
/secrets:
get:
summary: "List secrets"
operationId: "SecretList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Secret"
example:
- ID: "blt1owaxmitz71s9v5zh81zun"
Version:
Index: 85
CreatedAt: "2017-07-20T13:55:28.678958722Z"
UpdatedAt: "2017-07-20T13:55:28.678958722Z"
Spec:
Name: "mysql-passwd"
Labels:
some.label: "some.value"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the secrets list.
Available filters:
- `id=<secret id>`
- `label=<key> or label=<key>=value`
- `name=<secret name>`
- `names=<secret name>`
tags: ["Secret"]
/secrets/create:
post:
summary: "Create a secret"
operationId: "SecretCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/SecretSpec"
- type: "object"
example:
Name: "app-key.crt"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
tags: ["Secret"]
/secrets/{id}:
get:
summary: "Inspect a secret"
operationId: "SecretInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Secret"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
delete:
summary: "Delete a secret"
operationId: "SecretDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
/secrets/{id}/update:
post:
summary: "Update a Secret"
operationId: "SecretUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such secret"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the secret"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/SecretSpec"
description: |
The spec of the secret to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[SecretInspect endpoint](#operation/SecretInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the secret object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Secret"]
/configs:
get:
summary: "List configs"
operationId: "ConfigList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Config"
example:
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "server.conf"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the configs list.
Available filters:
- `id=<config id>`
- `label=<key> or label=<key>=value`
- `name=<config name>`
- `names=<config name>`
tags: ["Config"]
/configs/create:
post:
summary: "Create a config"
operationId: "ConfigCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/ConfigSpec"
- type: "object"
example:
Name: "server.conf"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
tags: ["Config"]
/configs/{id}:
get:
summary: "Inspect a config"
operationId: "ConfigInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Config"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
delete:
summary: "Delete a config"
operationId: "ConfigDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
/configs/{id}/update:
post:
summary: "Update a Config"
operationId: "ConfigUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such config"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the config"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/ConfigSpec"
description: |
The spec of the config to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[ConfigInspect endpoint](#operation/ConfigInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the config object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Config"]
/distribution/{name}/json:
get:
summary: "Get image information from the registry"
description: |
Return image digest and platform information by contacting the registry.
operationId: "DistributionInspect"
produces:
- "application/json"
responses:
200:
description: "descriptor and platform information"
schema:
$ref: "#/definitions/DistributionInspect"
401:
description: "Failed authentication or no image found"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Distribution"]
/session:
post:
summary: "Initialize interactive session"
description: |
Start a new interactive session with a server. Session allows server to
call back to the client for advanced capabilities.
### Hijacking
This endpoint hijacks the HTTP connection to HTTP2 transport that allows
the client to expose gPRC services on that connection.
For example, the client sends this request to upgrade the connection:
```
POST /session HTTP/1.1
Upgrade: h2c
Connection: Upgrade
```
The Docker daemon responds with a `101 UPGRADED` response follow with
the raw stream:
```
HTTP/1.1 101 UPGRADED
Connection: Upgrade
Upgrade: h2c
```
operationId: "Session"
produces:
- "application/vnd.docker.raw-stream"
responses:
101:
description: "no error, hijacking successful"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Session"]
| # A Swagger 2.0 (a.k.a. OpenAPI) definition of the Engine API.
#
# This is used for generating API documentation and the types used by the
# client/server. See api/README.md for more information.
#
# Some style notes:
# - This file is used by ReDoc, which allows GitHub Flavored Markdown in
# descriptions.
# - There is no maximum line length, for ease of editing and pretty diffs.
# - operationIds are in the format "NounVerb", with a singular noun.
swagger: "2.0"
schemes:
- "http"
- "https"
produces:
- "application/json"
- "text/plain"
consumes:
- "application/json"
- "text/plain"
basePath: "/v1.42"
info:
title: "Docker Engine API"
version: "1.42"
x-logo:
url: "https://docs.docker.com/images/logo-docker-main.png"
description: |
The Engine API is an HTTP API served by Docker Engine. It is the API the
Docker client uses to communicate with the Engine, so everything the Docker
client can do can be done with the API.
Most of the client's commands map directly to API endpoints (e.g. `docker ps`
is `GET /containers/json`). The notable exception is running containers,
which consists of several API calls.
# Errors
The API uses standard HTTP status codes to indicate the success or failure
of the API call. The body of the response will be JSON in the following
format:
```
{
"message": "page not found"
}
```
# Versioning
The API is usually changed in each release, so API calls are versioned to
ensure that clients don't break. To lock to a specific version of the API,
you prefix the URL with its version, for example, call `/v1.30/info` to use
the v1.30 version of the `/info` endpoint. If the API version specified in
the URL is not supported by the daemon, a HTTP `400 Bad Request` error message
is returned.
If you omit the version-prefix, the current version of the API (v1.42) is used.
For example, calling `/info` is the same as calling `/v1.42/info`. Using the
API without a version-prefix is deprecated and will be removed in a future release.
Engine releases in the near future should support this version of the API,
so your client will continue to work even if it is talking to a newer Engine.
The API uses an open schema model, which means server may add extra properties
to responses. Likewise, the server will ignore any extra query parameters and
request body properties. When you write clients, you need to ignore additional
properties in responses to ensure they do not break when talking to newer
daemons.
# Authentication
Authentication for registries is handled client side. The client has to send
authentication details to various endpoints that need to communicate with
registries, such as `POST /images/(name)/push`. These are sent as
`X-Registry-Auth` header as a [base64url encoded](https://tools.ietf.org/html/rfc4648#section-5)
(JSON) string with the following structure:
```
{
"username": "string",
"password": "string",
"email": "string",
"serveraddress": "string"
}
```
The `serveraddress` is a domain/IP without a protocol. Throughout this
structure, double quotes are required.
If you have already got an identity token from the [`/auth` endpoint](#operation/SystemAuth),
you can just pass this instead of credentials:
```
{
"identitytoken": "9cbaf023786cd7..."
}
```
# The tags on paths define the menu sections in the ReDoc documentation, so
# the usage of tags must make sense for that:
# - They should be singular, not plural.
# - There should not be too many tags, or the menu becomes unwieldy. For
# example, it is preferable to add a path to the "System" tag instead of
# creating a tag with a single path in it.
# - The order of tags in this list defines the order in the menu.
tags:
# Primary objects
- name: "Container"
x-displayName: "Containers"
description: |
Create and manage containers.
- name: "Image"
x-displayName: "Images"
- name: "Network"
x-displayName: "Networks"
description: |
Networks are user-defined networks that containers can be attached to.
See the [networking documentation](https://docs.docker.com/network/)
for more information.
- name: "Volume"
x-displayName: "Volumes"
description: |
Create and manage persistent storage that can be attached to containers.
- name: "Exec"
x-displayName: "Exec"
description: |
Run new commands inside running containers. Refer to the
[command-line reference](https://docs.docker.com/engine/reference/commandline/exec/)
for more information.
To exec a command in a container, you first need to create an exec instance,
then start it. These two API endpoints are wrapped up in a single command-line
command, `docker exec`.
# Swarm things
- name: "Swarm"
x-displayName: "Swarm"
description: |
Engines can be clustered together in a swarm. Refer to the
[swarm mode documentation](https://docs.docker.com/engine/swarm/)
for more information.
- name: "Node"
x-displayName: "Nodes"
description: |
Nodes are instances of the Engine participating in a swarm. Swarm mode
must be enabled for these endpoints to work.
- name: "Service"
x-displayName: "Services"
description: |
Services are the definitions of tasks to run on a swarm. Swarm mode must
be enabled for these endpoints to work.
- name: "Task"
x-displayName: "Tasks"
description: |
A task is a container running on a swarm. It is the atomic scheduling unit
of swarm. Swarm mode must be enabled for these endpoints to work.
- name: "Secret"
x-displayName: "Secrets"
description: |
Secrets are sensitive data that can be used by services. Swarm mode must
be enabled for these endpoints to work.
- name: "Config"
x-displayName: "Configs"
description: |
Configs are application configurations that can be used by services. Swarm
mode must be enabled for these endpoints to work.
# System things
- name: "Plugin"
x-displayName: "Plugins"
- name: "System"
x-displayName: "System"
definitions:
Port:
type: "object"
description: "An open port on a container"
required: [PrivatePort, Type]
properties:
IP:
type: "string"
format: "ip-address"
description: "Host IP address that the container's port is mapped to"
PrivatePort:
type: "integer"
format: "uint16"
x-nullable: false
description: "Port on the container"
PublicPort:
type: "integer"
format: "uint16"
description: "Port exposed on the host"
Type:
type: "string"
x-nullable: false
enum: ["tcp", "udp", "sctp"]
example:
PrivatePort: 8080
PublicPort: 80
Type: "tcp"
MountPoint:
type: "object"
description: |
MountPoint represents a mount point configuration inside the container.
This is used for reporting the mountpoints in use by a container.
properties:
Type:
description: |
The mount type:
- `bind` a mount of a file or directory from the host into the container.
- `volume` a docker volume with the given `Name`.
- `tmpfs` a `tmpfs`.
- `npipe` a named pipe from the host into the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
example: "volume"
Name:
description: |
Name is the name reference to the underlying data defined by `Source`
e.g., the volume name.
type: "string"
example: "myvolume"
Source:
description: |
Source location of the mount.
For volumes, this contains the storage location of the volume (within
`/var/lib/docker/volumes/`). For bind-mounts, and `npipe`, this contains
the source (host) part of the bind-mount. For `tmpfs` mount points, this
field is empty.
type: "string"
example: "/var/lib/docker/volumes/myvolume/_data"
Destination:
description: |
Destination is the path relative to the container root (`/`) where
the `Source` is mounted inside the container.
type: "string"
example: "/usr/share/nginx/html/"
Driver:
description: |
Driver is the volume driver used to create the volume (if it is a volume).
type: "string"
example: "local"
Mode:
description: |
Mode is a comma separated list of options supplied by the user when
creating the bind/volume mount.
The default is platform-specific (`"z"` on Linux, empty on Windows).
type: "string"
example: "z"
RW:
description: |
Whether the mount is mounted writable (read-write).
type: "boolean"
example: true
Propagation:
description: |
Propagation describes how mounts are propagated from the host into the
mount point, and vice-versa. Refer to the [Linux kernel documentation](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt)
for details. This field is not used on Windows.
type: "string"
example: ""
DeviceMapping:
type: "object"
description: "A device mapping between the host and container"
properties:
PathOnHost:
type: "string"
PathInContainer:
type: "string"
CgroupPermissions:
type: "string"
example:
PathOnHost: "/dev/deviceName"
PathInContainer: "/dev/deviceName"
CgroupPermissions: "mrw"
DeviceRequest:
type: "object"
description: "A request for devices to be sent to device drivers"
properties:
Driver:
type: "string"
example: "nvidia"
Count:
type: "integer"
example: -1
DeviceIDs:
type: "array"
items:
type: "string"
example:
- "0"
- "1"
- "GPU-fef8089b-4820-abfc-e83e-94318197576e"
Capabilities:
description: |
A list of capabilities; an OR list of AND lists of capabilities.
type: "array"
items:
type: "array"
items:
type: "string"
example:
# gpu AND nvidia AND compute
- ["gpu", "nvidia", "compute"]
Options:
description: |
Driver-specific options, specified as a key/value pairs. These options
are passed directly to the driver.
type: "object"
additionalProperties:
type: "string"
ThrottleDevice:
type: "object"
properties:
Path:
description: "Device path"
type: "string"
Rate:
description: "Rate"
type: "integer"
format: "int64"
minimum: 0
Mount:
type: "object"
properties:
Target:
description: "Container path."
type: "string"
Source:
description: "Mount source (e.g. a volume name, a host path)."
type: "string"
Type:
description: |
The mount type. Available types:
- `bind` Mounts a file or directory from the host into the container. Must exist prior to creating the container.
- `volume` Creates a volume with the given name and options (or uses a pre-existing volume with the same name and options). These are **not** removed when the container is removed.
- `tmpfs` Create a tmpfs with the given options. The mount source cannot be specified for tmpfs.
- `npipe` Mounts a named pipe from the host into the container. Must exist prior to creating the container.
type: "string"
enum:
- "bind"
- "volume"
- "tmpfs"
- "npipe"
ReadOnly:
description: "Whether the mount should be read-only."
type: "boolean"
Consistency:
description: "The consistency requirement for the mount: `default`, `consistent`, `cached`, or `delegated`."
type: "string"
BindOptions:
description: "Optional configuration for the `bind` type."
type: "object"
properties:
Propagation:
description: "A propagation mode with the value `[r]private`, `[r]shared`, or `[r]slave`."
type: "string"
enum:
- "private"
- "rprivate"
- "shared"
- "rshared"
- "slave"
- "rslave"
NonRecursive:
description: "Disable recursive bind mount."
type: "boolean"
default: false
VolumeOptions:
description: "Optional configuration for the `volume` type."
type: "object"
properties:
NoCopy:
description: "Populate volume with data from the target."
type: "boolean"
default: false
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
DriverConfig:
description: "Map of driver specific options"
type: "object"
properties:
Name:
description: "Name of the driver to use to create the volume."
type: "string"
Options:
description: "key/value map of driver specific options."
type: "object"
additionalProperties:
type: "string"
TmpfsOptions:
description: "Optional configuration for the `tmpfs` type."
type: "object"
properties:
SizeBytes:
description: "The size for the tmpfs mount in bytes."
type: "integer"
format: "int64"
Mode:
description: "The permission mode for the tmpfs mount in an integer."
type: "integer"
RestartPolicy:
description: |
The behavior to apply when the container exits. The default is not to
restart.
An ever increasing delay (double the previous delay, starting at 100ms) is
added before each restart to prevent flooding the server.
type: "object"
properties:
Name:
type: "string"
description: |
- Empty string means not to restart
- `no` Do not automatically restart
- `always` Always restart
- `unless-stopped` Restart always except when the user has manually stopped the container
- `on-failure` Restart only when the container exit code is non-zero
enum:
- ""
- "no"
- "always"
- "unless-stopped"
- "on-failure"
MaximumRetryCount:
type: "integer"
description: |
If `on-failure` is used, the number of times to retry before giving up.
Resources:
description: "A container's resources (cgroups config, ulimits, etc)"
type: "object"
properties:
# Applicable to all platforms
CpuShares:
description: |
An integer value representing this container's relative CPU weight
versus other containers.
type: "integer"
Memory:
description: "Memory limit in bytes."
type: "integer"
format: "int64"
default: 0
# Applicable to UNIX platforms
CgroupParent:
description: |
Path to `cgroups` under which the container's `cgroup` is created. If
the path is not absolute, the path is considered to be relative to the
`cgroups` path of the init process. Cgroups are created if they do not
already exist.
type: "string"
BlkioWeight:
description: "Block IO weight (relative weight)."
type: "integer"
minimum: 0
maximum: 1000
BlkioWeightDevice:
description: |
Block IO weight (relative device weight) in the form:
```
[{"Path": "device_path", "Weight": weight}]
```
type: "array"
items:
type: "object"
properties:
Path:
type: "string"
Weight:
type: "integer"
minimum: 0
BlkioDeviceReadBps:
description: |
Limit read rate (bytes per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteBps:
description: |
Limit write rate (bytes per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceReadIOps:
description: |
Limit read rate (IO per second) from a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
BlkioDeviceWriteIOps:
description: |
Limit write rate (IO per second) to a device, in the form:
```
[{"Path": "device_path", "Rate": rate}]
```
type: "array"
items:
$ref: "#/definitions/ThrottleDevice"
CpuPeriod:
description: "The length of a CPU period in microseconds."
type: "integer"
format: "int64"
CpuQuota:
description: |
Microseconds of CPU time that the container can get in a CPU period.
type: "integer"
format: "int64"
CpuRealtimePeriod:
description: |
The length of a CPU real-time period in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpuRealtimeRuntime:
description: |
The length of a CPU real-time runtime in microseconds. Set to 0 to
allocate no time allocated to real-time tasks.
type: "integer"
format: "int64"
CpusetCpus:
description: |
CPUs in which to allow execution (e.g., `0-3`, `0,1`).
type: "string"
example: "0-3"
CpusetMems:
description: |
Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only
effective on NUMA systems.
type: "string"
Devices:
description: "A list of devices to add to the container."
type: "array"
items:
$ref: "#/definitions/DeviceMapping"
DeviceCgroupRules:
description: "a list of cgroup rules to apply to the container"
type: "array"
items:
type: "string"
example: "c 13:* rwm"
DeviceRequests:
description: |
A list of requests for devices to be sent to device drivers.
type: "array"
items:
$ref: "#/definitions/DeviceRequest"
KernelMemoryTCP:
description: |
Hard limit for kernel TCP buffer memory (in bytes). Depending on the
OCI runtime in use, this option may be ignored. It is no longer supported
by the default (runc) runtime.
This field is omitted when empty.
type: "integer"
format: "int64"
MemoryReservation:
description: "Memory soft limit in bytes."
type: "integer"
format: "int64"
MemorySwap:
description: |
Total memory limit (memory + swap). Set as `-1` to enable unlimited
swap.
type: "integer"
format: "int64"
MemorySwappiness:
description: |
Tune a container's memory swappiness behavior. Accepts an integer
between 0 and 100.
type: "integer"
format: "int64"
minimum: 0
maximum: 100
NanoCpus:
description: "CPU quota in units of 10<sup>-9</sup> CPUs."
type: "integer"
format: "int64"
OomKillDisable:
description: "Disable OOM Killer for the container."
type: "boolean"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
PidsLimit:
description: |
Tune a container's PIDs limit. Set `0` or `-1` for unlimited, or `null`
to not change.
type: "integer"
format: "int64"
x-nullable: true
Ulimits:
description: |
A list of resource limits to set in the container. For example:
```
{"Name": "nofile", "Soft": 1024, "Hard": 2048}
```
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
# Applicable to Windows
CpuCount:
description: |
The number of usable CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
CpuPercent:
description: |
The usable percentage of the available CPUs (Windows only).
On Windows Server containers, the processor resource controls are
mutually exclusive. The order of precedence is `CPUCount` first, then
`CPUShares`, and `CPUPercent` last.
type: "integer"
format: "int64"
IOMaximumIOps:
description: "Maximum IOps for the container system drive (Windows only)"
type: "integer"
format: "int64"
IOMaximumBandwidth:
description: |
Maximum IO in bytes per second for the container system drive
(Windows only).
type: "integer"
format: "int64"
Limit:
description: |
An object describing a limit on resources which can be requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
Pids:
description: |
Limits the maximum number of PIDs in the container. Set `0` for unlimited.
type: "integer"
format: "int64"
default: 0
example: 100
ResourceObject:
description: |
An object describing the resources which can be advertised by a node and
requested by a task.
type: "object"
properties:
NanoCPUs:
type: "integer"
format: "int64"
example: 4000000000
MemoryBytes:
type: "integer"
format: "int64"
example: 8272408576
GenericResources:
$ref: "#/definitions/GenericResources"
GenericResources:
description: |
User-defined resources can be either Integer resources (e.g, `SSD=3`) or
String resources (e.g, `GPU=UUID1`).
type: "array"
items:
type: "object"
properties:
NamedResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "string"
DiscreteResourceSpec:
type: "object"
properties:
Kind:
type: "string"
Value:
type: "integer"
format: "int64"
example:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
HealthConfig:
description: "A test to perform to check that the container is healthy."
type: "object"
properties:
Test:
description: |
The test to perform. Possible values are:
- `[]` inherit healthcheck from image or parent image
- `["NONE"]` disable healthcheck
- `["CMD", args...]` exec arguments directly
- `["CMD-SHELL", command]` run command with system's default shell
type: "array"
items:
type: "string"
Interval:
description: |
The time to wait between checks in nanoseconds. It should be 0 or at
least 1000000 (1 ms). 0 means inherit.
type: "integer"
Timeout:
description: |
The time to wait before considering the check to have hung. It should
be 0 or at least 1000000 (1 ms). 0 means inherit.
type: "integer"
Retries:
description: |
The number of consecutive failures needed to consider a container as
unhealthy. 0 means inherit.
type: "integer"
StartPeriod:
description: |
Start period for the container to initialize before starting
health-retries countdown in nanoseconds. It should be 0 or at least
1000000 (1 ms). 0 means inherit.
type: "integer"
Health:
description: |
Health stores information about the container's healthcheck results.
type: "object"
x-nullable: true
properties:
Status:
description: |
Status is one of `none`, `starting`, `healthy` or `unhealthy`
- "none" Indicates there is no healthcheck
- "starting" Starting indicates that the container is not yet ready
- "healthy" Healthy indicates that the container is running correctly
- "unhealthy" Unhealthy indicates that the container has a problem
type: "string"
enum:
- "none"
- "starting"
- "healthy"
- "unhealthy"
example: "healthy"
FailingStreak:
description: "FailingStreak is the number of consecutive failures"
type: "integer"
example: 0
Log:
type: "array"
description: |
Log contains the last few results (oldest first)
items:
$ref: "#/definitions/HealthcheckResult"
HealthcheckResult:
description: |
HealthcheckResult stores information about a single run of a healthcheck probe
type: "object"
x-nullable: true
properties:
Start:
description: |
Date and time at which this check started in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "date-time"
example: "2020-01-04T10:44:24.496525531Z"
End:
description: |
Date and time at which this check ended in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2020-01-04T10:45:21.364524523Z"
ExitCode:
description: |
ExitCode meanings:
- `0` healthy
- `1` unhealthy
- `2` reserved (considered unhealthy)
- other values: error running probe
type: "integer"
example: 0
Output:
description: "Output from last check"
type: "string"
HostConfig:
description: "Container configuration that depends on the host we are running on"
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
# Applicable to all platforms
Binds:
type: "array"
description: |
A list of volume bindings for this container. Each volume binding
is a string in one of these forms:
- `host-src:container-dest[:options]` to bind-mount a host path
into the container. Both `host-src`, and `container-dest` must
be an _absolute_ path.
- `volume-name:container-dest[:options]` to bind-mount a volume
managed by a volume driver into the container. `container-dest`
must be an _absolute_ path.
`options` is an optional, comma-delimited list of:
- `nocopy` disables automatic copying of data from the container
path to the volume. The `nocopy` flag only applies to named volumes.
- `[ro|rw]` mounts a volume read-only or read-write, respectively.
If omitted or set to `rw`, volumes are mounted read-write.
- `[z|Z]` applies SELinux labels to allow or deny multiple containers
to read and write to the same volume.
- `z`: a _shared_ content label is applied to the content. This
label indicates that multiple containers can share the volume
content, for both reading and writing.
- `Z`: a _private unshared_ label is applied to the content.
This label indicates that only the current container can use
a private volume. Labeling systems such as SELinux require
proper labels to be placed on volume content that is mounted
into a container. Without a label, the security system can
prevent a container's processes from using the content. By
default, the labels set by the host operating system are not
modified.
- `[[r]shared|[r]slave|[r]private]` specifies mount
[propagation behavior](https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt).
This only applies to bind-mounted volumes, not internal volumes
or named volumes. Mount propagation requires the source mount
point (the location where the source directory is mounted in the
host operating system) to have the correct propagation properties.
For shared volumes, the source mount point must be set to `shared`.
For slave volumes, the mount must be set to either `shared` or
`slave`.
items:
type: "string"
ContainerIDFile:
type: "string"
description: "Path to a file where the container ID is written"
LogConfig:
type: "object"
description: "The logging configuration for this container"
properties:
Type:
type: "string"
enum:
- "json-file"
- "syslog"
- "journald"
- "gelf"
- "fluentd"
- "awslogs"
- "splunk"
- "etwlogs"
- "none"
Config:
type: "object"
additionalProperties:
type: "string"
NetworkMode:
type: "string"
description: |
Network mode to use for this container. Supported standard values
are: `bridge`, `host`, `none`, and `container:<name|id>`. Any
other value is taken as a custom network's name to which this
container should connect to.
PortBindings:
$ref: "#/definitions/PortMap"
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
AutoRemove:
type: "boolean"
description: |
Automatically remove the container when the container's process
exits. This has no effect if `RestartPolicy` is set.
VolumeDriver:
type: "string"
description: "Driver that this container uses to mount volumes."
VolumesFrom:
type: "array"
description: |
A list of volumes to inherit from another container, specified in
the form `<container name>[:<ro|rw>]`.
items:
type: "string"
Mounts:
description: |
Specification for mounts to be added to the container.
type: "array"
items:
$ref: "#/definitions/Mount"
# Applicable to UNIX platforms
CapAdd:
type: "array"
description: |
A list of kernel capabilities to add to the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CapDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the container. Conflicts
with option 'Capabilities'.
items:
type: "string"
CgroupnsMode:
type: "string"
enum:
- "private"
- "host"
description: |
cgroup namespace mode for the container. Possible values are:
- `"private"`: the container runs in its own private cgroup namespace
- `"host"`: use the host system's cgroup namespace
If not specified, the daemon default is used, which can either be `"private"`
or `"host"`, depending on daemon version, kernel support and configuration.
Dns:
type: "array"
description: "A list of DNS servers for the container to use."
items:
type: "string"
DnsOptions:
type: "array"
description: "A list of DNS options."
items:
type: "string"
DnsSearch:
type: "array"
description: "A list of DNS search domains."
items:
type: "string"
ExtraHosts:
type: "array"
description: |
A list of hostnames/IP mappings to add to the container's `/etc/hosts`
file. Specified in the form `["hostname:IP"]`.
items:
type: "string"
GroupAdd:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
IpcMode:
type: "string"
description: |
IPC sharing mode for the container. Possible values are:
- `"none"`: own private IPC namespace, with /dev/shm not mounted
- `"private"`: own private IPC namespace
- `"shareable"`: own private IPC namespace, with a possibility to share it with other containers
- `"container:<name|id>"`: join another (shareable) container's IPC namespace
- `"host"`: use the host system's IPC namespace
If not specified, daemon default is used, which can either be `"private"`
or `"shareable"`, depending on daemon version and configuration.
Cgroup:
type: "string"
description: "Cgroup to use for the container."
Links:
type: "array"
description: |
A list of links for the container in the form `container_name:alias`.
items:
type: "string"
OomScoreAdj:
type: "integer"
description: |
An integer value containing the score given to the container in
order to tune OOM killer preferences.
example: 500
PidMode:
type: "string"
description: |
Set the PID (Process) Namespace mode for the container. It can be
either:
- `"container:<name|id>"`: joins another container's PID namespace
- `"host"`: use the host's PID namespace inside the container
Privileged:
type: "boolean"
description: "Gives the container full access to the host."
PublishAllPorts:
type: "boolean"
description: |
Allocates an ephemeral host port for all of a container's
exposed ports.
Ports are de-allocated when the container stops and allocated when
the container starts. The allocated port might be changed when
restarting the container.
The port is selected from the ephemeral port range that depends on
the kernel. For example, on Linux the range is defined by
`/proc/sys/net/ipv4/ip_local_port_range`.
ReadonlyRootfs:
type: "boolean"
description: "Mount the container's root filesystem as read only."
SecurityOpt:
type: "array"
description: |
A list of string values to customize labels for MLS systems, such
as SELinux.
items:
type: "string"
StorageOpt:
type: "object"
description: |
Storage driver options for this container, in the form `{"size": "120G"}`.
additionalProperties:
type: "string"
Tmpfs:
type: "object"
description: |
A map of container directories which should be replaced by tmpfs
mounts, and their corresponding mount options. For example:
```
{ "/run": "rw,noexec,nosuid,size=65536k" }
```
additionalProperties:
type: "string"
UTSMode:
type: "string"
description: "UTS namespace to use for the container."
UsernsMode:
type: "string"
description: |
Sets the usernamespace mode for the container when usernamespace
remapping option is enabled.
ShmSize:
type: "integer"
description: |
Size of `/dev/shm` in bytes. If omitted, the system uses 64MB.
minimum: 0
Sysctls:
type: "object"
description: |
A list of kernel parameters (sysctls) to set in the container.
For example:
```
{"net.ipv4.ip_forward": "1"}
```
additionalProperties:
type: "string"
Runtime:
type: "string"
description: "Runtime to use with this container."
# Applicable to Windows
ConsoleSize:
type: "array"
description: |
Initial console size, as an `[height, width]` array. (Windows only)
minItems: 2
maxItems: 2
items:
type: "integer"
minimum: 0
Isolation:
type: "string"
description: |
Isolation technology of the container. (Windows only)
enum:
- "default"
- "process"
- "hyperv"
MaskedPaths:
type: "array"
description: |
The list of paths to be masked inside the container (this overrides
the default set of paths).
items:
type: "string"
ReadonlyPaths:
type: "array"
description: |
The list of paths to be set as read-only inside the container
(this overrides the default set of paths).
items:
type: "string"
ContainerConfig:
description: |
Configuration for a container that is portable between hosts.
When used as `ContainerConfig` field in an image, `ContainerConfig` is an
optional field containing the configuration of the container that was last
committed when creating the image.
Previous versions of Docker builder used this field to store build cache,
and it is not in active use anymore.
type: "object"
properties:
Hostname:
description: |
The hostname to use for the container, as a valid RFC 1123 hostname.
type: "string"
example: "439f4e91bd1d"
Domainname:
description: |
The domain name to use for the container.
type: "string"
User:
description: "The user that commands are run as inside the container."
type: "string"
AttachStdin:
description: "Whether to attach to `stdin`."
type: "boolean"
default: false
AttachStdout:
description: "Whether to attach to `stdout`."
type: "boolean"
default: true
AttachStderr:
description: "Whether to attach to `stderr`."
type: "boolean"
default: true
ExposedPorts:
description: |
An object mapping ports to an empty object in the form:
`{"<port>/<tcp|udp|sctp>": {}}`
type: "object"
x-nullable: true
additionalProperties:
type: "object"
enum:
- {}
default: {}
example: {
"80/tcp": {},
"443/tcp": {}
}
Tty:
description: |
Attach standard streams to a TTY, including `stdin` if it is not closed.
type: "boolean"
default: false
OpenStdin:
description: "Open `stdin`"
type: "boolean"
default: false
StdinOnce:
description: "Close `stdin` after one attached client disconnects"
type: "boolean"
default: false
Env:
description: |
A list of environment variables to set inside the container in the
form `["VAR=value", ...]`. A variable without `=` is removed from the
environment, rather than to have an empty value.
type: "array"
items:
type: "string"
example:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Cmd:
description: |
Command to run specified as a string or an array of strings.
type: "array"
items:
type: "string"
example: ["/bin/sh"]
Healthcheck:
$ref: "#/definitions/HealthConfig"
ArgsEscaped:
description: "Command is already escaped (Windows only)"
type: "boolean"
default: false
example: false
x-nullable: true
Image:
description: |
The name (or reference) of the image to use when creating the container,
or which was used when the container was created.
type: "string"
example: "example-image:1.0"
Volumes:
description: |
An object mapping mount point paths inside the container to empty
objects.
type: "object"
additionalProperties:
type: "object"
enum:
- {}
default: {}
WorkingDir:
description: "The working directory for commands to run in."
type: "string"
example: "/public/"
Entrypoint:
description: |
The entry point for the container as a string or an array of strings.
If the array consists of exactly one empty string (`[""]`) then the
entry point is reset to system default (i.e., the entry point used by
docker when there is no `ENTRYPOINT` instruction in the `Dockerfile`).
type: "array"
items:
type: "string"
example: []
NetworkDisabled:
description: "Disable networking for the container."
type: "boolean"
x-nullable: true
MacAddress:
description: "MAC address of the container."
type: "string"
x-nullable: true
OnBuild:
description: |
`ONBUILD` metadata that were defined in the image's `Dockerfile`.
type: "array"
x-nullable: true
items:
type: "string"
example: []
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
StopSignal:
description: |
Signal to stop a container as a string or unsigned integer.
type: "string"
example: "SIGTERM"
x-nullable: true
StopTimeout:
description: "Timeout to stop a container in seconds."
type: "integer"
default: 10
x-nullable: true
Shell:
description: |
Shell for when `RUN`, `CMD`, and `ENTRYPOINT` uses a shell.
type: "array"
x-nullable: true
items:
type: "string"
example: ["/bin/sh", "-c"]
NetworkingConfig:
description: |
NetworkingConfig represents the container's networking configuration for
each of its interfaces.
It is used for the networking configs specified in the `docker create`
and `docker network connect` commands.
type: "object"
properties:
EndpointsConfig:
description: |
A mapping of network name to endpoint configuration for that network.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
example:
# putting an example here, instead of using the example values from
# /definitions/EndpointSettings, because containers/create currently
# does not support attaching to multiple networks, so the example request
# would be confusing if it showed that multiple networks can be contained
# in the EndpointsConfig.
# TODO remove once we support multiple networks on container create (see https://github.com/moby/moby/blob/07e6b843594e061f82baa5fa23c2ff7d536c2a05/daemon/create.go#L323)
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
NetworkSettings:
description: "NetworkSettings exposes the network settings in the API"
type: "object"
properties:
Bridge:
description: Name of the network's bridge (for example, `docker0`).
type: "string"
example: "docker0"
SandboxID:
description: SandboxID uniquely represents a container's network stack.
type: "string"
example: "9d12daf2c33f5959c8bf90aa513e4f65b561738661003029ec84830cd503a0c3"
HairpinMode:
description: |
Indicates if hairpin NAT should be enabled on the virtual interface.
type: "boolean"
example: false
LinkLocalIPv6Address:
description: IPv6 unicast address using the link-local prefix.
type: "string"
example: "fe80::42:acff:fe11:1"
LinkLocalIPv6PrefixLen:
description: Prefix length of the IPv6 unicast address.
type: "integer"
example: "64"
Ports:
$ref: "#/definitions/PortMap"
SandboxKey:
description: SandboxKey identifies the sandbox
type: "string"
example: "/var/run/docker/netns/8ab54b426c38"
# TODO is SecondaryIPAddresses actually used?
SecondaryIPAddresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO is SecondaryIPv6Addresses actually used?
SecondaryIPv6Addresses:
description: ""
type: "array"
items:
$ref: "#/definitions/Address"
x-nullable: true
# TODO properties below are part of DefaultNetworkSettings, which is
# marked as deprecated since Docker 1.9 and to be removed in Docker v17.12
EndpointID:
description: |
EndpointID uniquely represents a service endpoint in a Sandbox.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.1"
GlobalIPv6Address:
description: |
Global IPv6 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 64
IPAddress:
description: |
IPv4 address for the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address for this network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "2001:db8:2::100"
MacAddress:
description: |
MAC address for the container on the default "bridge" network.
<p><br /></p>
> **Deprecated**: This field is only propagated when attached to the
> default "bridge" network. Use the information from the "bridge"
> network inside the `Networks` map instead, which contains the same
> information. This field was deprecated in Docker 1.9 and is scheduled
> to be removed in Docker 17.12.0
type: "string"
example: "02:42:ac:11:00:04"
Networks:
description: |
Information about all networks that the container is connected to.
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Address:
description: Address represents an IPv4 or IPv6 IP address.
type: "object"
properties:
Addr:
description: IP address.
type: "string"
PrefixLen:
description: Mask length of the IP address.
type: "integer"
PortMap:
description: |
PortMap describes the mapping of container ports to host ports, using the
container's port-number and protocol as key in the format `<port>/<protocol>`,
for example, `80/udp`.
If a container's port is mapped for multiple protocols, separate entries
are added to the mapping table.
type: "object"
additionalProperties:
type: "array"
x-nullable: true
items:
$ref: "#/definitions/PortBinding"
example:
"443/tcp":
- HostIp: "127.0.0.1"
HostPort: "4443"
"80/tcp":
- HostIp: "0.0.0.0"
HostPort: "80"
- HostIp: "0.0.0.0"
HostPort: "8080"
"80/udp":
- HostIp: "0.0.0.0"
HostPort: "80"
"53/udp":
- HostIp: "0.0.0.0"
HostPort: "53"
"2377/tcp": null
PortBinding:
description: |
PortBinding represents a binding between a host IP address and a host
port.
type: "object"
properties:
HostIp:
description: "Host IP address that the container's port is mapped to."
type: "string"
example: "127.0.0.1"
HostPort:
description: "Host port number that the container's port is mapped to."
type: "string"
example: "4443"
GraphDriverData:
description: |
Information about the storage driver used to store the container's and
image's filesystem.
type: "object"
required: [Name, Data]
properties:
Name:
description: "Name of the storage driver."
type: "string"
x-nullable: false
example: "overlay2"
Data:
description: |
Low-level storage metadata, provided as key/value pairs.
This information is driver-specific, and depends on the storage-driver
in use, and should be used for informational purposes only.
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example: {
"MergedDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/merged",
"UpperDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/diff",
"WorkDir": "/var/lib/docker/overlay2/ef749362d13333e65fc95c572eb525abbe0052e16e086cb64bc3b98ae9aa6d74/work"
}
ImageInspect:
description: |
Information about an image in the local image cache.
type: "object"
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Parent:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
Comment:
description: |
Optional message that was set when committing or importing the image.
type: "string"
x-nullable: false
example: ""
Created:
description: |
Date and time at which the image was created, formatted in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
x-nullable: false
example: "2022-02-04T21:20:12.497794809Z"
Container:
description: |
The ID of the container that was used to create the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "65974bc86f1770ae4bff79f651ebdbce166ae9aada632ee3fa9af3a264911735"
ContainerConfig:
$ref: "#/definitions/ContainerConfig"
DockerVersion:
description: |
The version of Docker that was used to build the image.
Depending on how the image was created, this field may be empty.
type: "string"
x-nullable: false
example: "20.10.7"
Author:
description: |
Name of the author that was specified when committing the image, or as
specified through MAINTAINER (deprecated) in the Dockerfile.
type: "string"
x-nullable: false
example: ""
Config:
$ref: "#/definitions/ContainerConfig"
Architecture:
description: |
Hardware CPU architecture that the image runs on.
type: "string"
x-nullable: false
example: "arm"
Variant:
description: |
CPU architecture variant (presently ARM-only).
type: "string"
x-nullable: true
example: "v7"
Os:
description: |
Operating System the image is built to run on.
type: "string"
x-nullable: false
example: "linux"
OsVersion:
description: |
Operating System version the image is built to run on (especially
for Windows).
type: "string"
example: ""
x-nullable: true
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 1239828
GraphDriver:
$ref: "#/definitions/GraphDriverData"
RootFS:
description: |
Information about the image's RootFS, including the layer IDs.
type: "object"
required: [Type]
properties:
Type:
type: "string"
x-nullable: false
example: "layers"
Layers:
type: "array"
items:
type: "string"
example:
- "sha256:1834950e52ce4d5a88a1bbd131c537f4d0e56d10ff0dd69e66be3b7dfa9df7e6"
- "sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef"
Metadata:
description: |
Additional metadata of the image in the local cache. This information
is local to the daemon, and not part of the image itself.
type: "object"
properties:
LastTagTime:
description: |
Date and time at which the image was last tagged in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
This information is only available if the image was tagged locally,
and omitted otherwise.
type: "string"
format: "dateTime"
example: "2022-02-28T14:40:02.623929178Z"
x-nullable: true
ImageSummary:
type: "object"
required:
- Id
- ParentId
- RepoTags
- RepoDigests
- Created
- Size
- SharedSize
- VirtualSize
- Labels
- Containers
properties:
Id:
description: |
ID is the content-addressable ID of an image.
This identifier is a content-addressable digest calculated from the
image's configuration (which includes the digests of layers used by
the image).
Note that this digest differs from the `RepoDigests` below, which
holds digests of image manifests that reference the image.
type: "string"
x-nullable: false
example: "sha256:ec3f0931a6e6b6855d76b2d7b0be30e81860baccd891b2e243280bf1cd8ad710"
ParentId:
description: |
ID of the parent image.
Depending on how the image was created, this field may be empty and
is only set for images that were built/created locally. This field
is empty if the image was pulled from an image registry.
type: "string"
x-nullable: false
example: ""
RepoTags:
description: |
List of image names/tags in the local image cache that reference this
image.
Multiple image tags can refer to the same imagem and this list may be
empty if no tags reference the image, in which case the image is
"untagged", in which case it can still be referenced by its ID.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example:1.0"
- "example:latest"
- "example:stable"
- "internal.registry.example.com:5000/example:1.0"
RepoDigests:
description: |
List of content-addressable digests of locally available image manifests
that the image is referenced from. Multiple manifests can refer to the
same image.
These digests are usually only available if the image was either pulled
from a registry, or if the image was pushed to a registry, which is when
the manifest is generated and its digest calculated.
type: "array"
x-nullable: false
items:
type: "string"
example:
- "example@sha256:afcc7f1ac1b49db317a7196c902e61c6c3c4607d63599ee1a82d702d249a0ccb"
- "internal.registry.example.com:5000/example@sha256:b69959407d21e8a062e0416bf13405bb2b71ed7a84dde4158ebafacfa06f5578"
Created:
description: |
Date and time at which the image was created as a Unix timestamp
(number of seconds sinds EPOCH).
type: "integer"
x-nullable: false
example: "1644009612"
Size:
description: |
Total size of the image including all layers it is composed of.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
SharedSize:
description: |
Total size of image layers that are shared between this image and other
images.
This size is not calculated by default. `-1` indicates that the value
has not been set / calculated.
type: "integer"
x-nullable: false
example: 1239828
VirtualSize:
description: |
Total size of the image including all layers it is composed of.
In versions of Docker before v1.10, this field was calculated from
the image itself and all of its parent images. Docker v1.10 and up
store images self-contained, and no longer use a parent-chain, making
this field an equivalent of the Size field.
This field is kept for backward compatibility, but may be removed in
a future version of the API.
type: "integer"
format: "int64"
x-nullable: false
example: 172064416
Labels:
description: "User-defined key/value metadata."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Containers:
description: |
Number of containers using this image. Includes both stopped and running
containers.
This size is not calculated by default, and depends on which API endpoint
is used. `-1` indicates that the value has not been set / calculated.
x-nullable: false
type: "integer"
example: 2
AuthConfig:
type: "object"
properties:
username:
type: "string"
password:
type: "string"
email:
type: "string"
serveraddress:
type: "string"
example:
username: "hannibal"
password: "xxxx"
serveraddress: "https://index.docker.io/v1/"
ProcessConfig:
type: "object"
properties:
privileged:
type: "boolean"
user:
type: "string"
tty:
type: "boolean"
entrypoint:
type: "string"
arguments:
type: "array"
items:
type: "string"
Volume:
type: "object"
required: [Name, Driver, Mountpoint, Labels, Scope, Options]
properties:
Name:
type: "string"
description: "Name of the volume."
x-nullable: false
example: "tardis"
Driver:
type: "string"
description: "Name of the volume driver used by the volume."
x-nullable: false
example: "custom"
Mountpoint:
type: "string"
description: "Mount path of the volume on the host."
x-nullable: false
example: "/var/lib/docker/volumes/tardis"
CreatedAt:
type: "string"
format: "dateTime"
description: "Date/Time the volume was created."
example: "2016-06-07T20:31:11.853781916Z"
Status:
type: "object"
description: |
Low-level details about the volume, provided by the volume driver.
Details are returned as a map with key/value pairs:
`{"key":"value","key2":"value2"}`.
The `Status` field is optional, and is omitted if the volume driver
does not support this feature.
additionalProperties:
type: "object"
example:
hello: "world"
Labels:
type: "object"
description: "User-defined key/value metadata."
x-nullable: false
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Scope:
type: "string"
description: |
The level at which the volume exists. Either `global` for cluster-wide,
or `local` for machine level.
default: "local"
x-nullable: false
enum: ["local", "global"]
example: "local"
ClusterVolume:
$ref: "#/definitions/ClusterVolume"
Options:
type: "object"
description: |
The driver specific options used when creating the volume.
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
UsageData:
type: "object"
x-nullable: true
x-go-name: "UsageData"
required: [Size, RefCount]
description: |
Usage details about the volume. This information is used by the
`GET /system/df` endpoint, and omitted in other endpoints.
properties:
Size:
type: "integer"
default: -1
description: |
Amount of disk space used by the volume (in bytes). This information
is only available for volumes created with the `"local"` volume
driver. For volumes created with other volume drivers, this field
is set to `-1` ("not available")
x-nullable: false
RefCount:
type: "integer"
default: -1
description: |
The number of containers referencing this volume. This field
is set to `-1` if the reference-count is not available.
x-nullable: false
VolumeCreateOptions:
description: "Volume configuration"
type: "object"
title: "VolumeConfig"
x-go-name: "CreateOptions"
properties:
Name:
description: |
The new volume's name. If not specified, Docker generates a name.
type: "string"
x-nullable: false
example: "tardis"
Driver:
description: "Name of the volume driver to use."
type: "string"
default: "local"
x-nullable: false
example: "custom"
DriverOpts:
description: |
A mapping of driver options and values. These options are
passed directly to the driver and are driver specific.
type: "object"
additionalProperties:
type: "string"
example:
device: "tmpfs"
o: "size=100m,uid=1000"
type: "tmpfs"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
ClusterVolumeSpec:
$ref: "#/definitions/ClusterVolumeSpec"
VolumeListResponse:
type: "object"
title: "VolumeListResponse"
x-go-name: "ListResponse"
description: "Volume list response"
properties:
Volumes:
type: "array"
description: "List of volumes"
items:
$ref: "#/definitions/Volume"
Warnings:
type: "array"
description: |
Warnings that occurred when fetching the list of volumes.
items:
type: "string"
example: []
Network:
type: "object"
properties:
Name:
type: "string"
Id:
type: "string"
Created:
type: "string"
format: "dateTime"
Scope:
type: "string"
Driver:
type: "string"
EnableIPv6:
type: "boolean"
IPAM:
$ref: "#/definitions/IPAM"
Internal:
type: "boolean"
Attachable:
type: "boolean"
Ingress:
type: "boolean"
Containers:
type: "object"
additionalProperties:
$ref: "#/definitions/NetworkContainer"
Options:
type: "object"
additionalProperties:
type: "string"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
Name: "net01"
Id: "7d86d31b1478e7cca9ebed7e73aa0fdeec46c5ca29497431d3007d2d9e15ed99"
Created: "2016-10-19T04:33:30.360899459Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
IPAM:
Driver: "default"
Config:
- Subnet: "172.19.0.0/16"
Gateway: "172.19.0.1"
Options:
foo: "bar"
Internal: false
Attachable: false
Ingress: false
Containers:
19a4d5d687db25203351ed79d478946f861258f018fe384f229f2efa4b23513c:
Name: "test"
EndpointID: "628cadb8bcb92de107b2a1e516cbffe463e321f548feb37697cce00ad694f21a"
MacAddress: "02:42:ac:13:00:02"
IPv4Address: "172.19.0.2/16"
IPv6Address: ""
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
IPAM:
type: "object"
properties:
Driver:
description: "Name of the IPAM driver to use."
type: "string"
default: "default"
Config:
description: |
List of IPAM configuration options, specified as a map:
```
{"Subnet": <CIDR>, "IPRange": <CIDR>, "Gateway": <IP address>, "AuxAddress": <device_name:IP address>}
```
type: "array"
items:
$ref: "#/definitions/IPAMConfig"
Options:
description: "Driver-specific options, specified as a map."
type: "object"
additionalProperties:
type: "string"
IPAMConfig:
type: "object"
properties:
Subnet:
type: "string"
IPRange:
type: "string"
Gateway:
type: "string"
AuxiliaryAddresses:
type: "object"
additionalProperties:
type: "string"
NetworkContainer:
type: "object"
properties:
Name:
type: "string"
EndpointID:
type: "string"
MacAddress:
type: "string"
IPv4Address:
type: "string"
IPv6Address:
type: "string"
BuildInfo:
type: "object"
properties:
id:
type: "string"
stream:
type: "string"
error:
type: "string"
errorDetail:
$ref: "#/definitions/ErrorDetail"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
aux:
$ref: "#/definitions/ImageID"
BuildCache:
type: "object"
properties:
ID:
type: "string"
Parent:
type: "string"
Type:
type: "string"
Description:
type: "string"
InUse:
type: "boolean"
Shared:
type: "boolean"
Size:
description: |
Amount of disk space used by the build cache (in bytes).
type: "integer"
CreatedAt:
description: |
Date and time at which the build cache was created in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
LastUsedAt:
description: |
Date and time at which the build cache was last used in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
x-nullable: true
example: "2017-08-09T07:09:37.632105588Z"
UsageCount:
type: "integer"
ImageID:
type: "object"
description: "Image ID or Digest"
properties:
ID:
type: "string"
example:
ID: "sha256:85f05633ddc1c50679be2b16a0479ab6f7637f8884e0cfe0f4d20e1ebb3d6e7c"
CreateImageInfo:
type: "object"
properties:
id:
type: "string"
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
PushImageInfo:
type: "object"
properties:
error:
type: "string"
status:
type: "string"
progress:
type: "string"
progressDetail:
$ref: "#/definitions/ProgressDetail"
ErrorDetail:
type: "object"
properties:
code:
type: "integer"
message:
type: "string"
ProgressDetail:
type: "object"
properties:
current:
type: "integer"
total:
type: "integer"
ErrorResponse:
description: "Represents an error."
type: "object"
required: ["message"]
properties:
message:
description: "The error message."
type: "string"
x-nullable: false
example:
message: "Something went wrong."
IdResponse:
description: "Response to an API call that returns just an Id"
type: "object"
required: ["Id"]
properties:
Id:
description: "The id of the newly created object."
type: "string"
x-nullable: false
EndpointSettings:
description: "Configuration for a network endpoint."
type: "object"
properties:
# Configurations
IPAMConfig:
$ref: "#/definitions/EndpointIPAMConfig"
Links:
type: "array"
items:
type: "string"
example:
- "container_1"
- "container_2"
Aliases:
type: "array"
items:
type: "string"
example:
- "server_x"
- "server_y"
# Operational data
NetworkID:
description: |
Unique ID of the network.
type: "string"
example: "08754567f1f40222263eab4102e1c733ae697e8e354aa9cd6e18d7402835292a"
EndpointID:
description: |
Unique ID for the service endpoint in a Sandbox.
type: "string"
example: "b88f5b905aabf2893f3cbc4ee42d1ea7980bbc0a92e2c8922b1e1795298afb0b"
Gateway:
description: |
Gateway address for this network.
type: "string"
example: "172.17.0.1"
IPAddress:
description: |
IPv4 address.
type: "string"
example: "172.17.0.4"
IPPrefixLen:
description: |
Mask length of the IPv4 address.
type: "integer"
example: 16
IPv6Gateway:
description: |
IPv6 gateway address.
type: "string"
example: "2001:db8:2::100"
GlobalIPv6Address:
description: |
Global IPv6 address.
type: "string"
example: "2001:db8::5689"
GlobalIPv6PrefixLen:
description: |
Mask length of the global IPv6 address.
type: "integer"
format: "int64"
example: 64
MacAddress:
description: |
MAC address for the endpoint on this network.
type: "string"
example: "02:42:ac:11:00:04"
DriverOpts:
description: |
DriverOpts is a mapping of driver options and values. These options
are passed directly to the driver and are driver specific.
type: "object"
x-nullable: true
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
EndpointIPAMConfig:
description: |
EndpointIPAMConfig represents an endpoint's IPAM configuration.
type: "object"
x-nullable: true
properties:
IPv4Address:
type: "string"
example: "172.20.30.33"
IPv6Address:
type: "string"
example: "2001:db8:abcd::3033"
LinkLocalIPs:
type: "array"
items:
type: "string"
example:
- "169.254.34.68"
- "fe80::3468"
PluginMount:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Source, Destination, Type, Options]
properties:
Name:
type: "string"
x-nullable: false
example: "some-mount"
Description:
type: "string"
x-nullable: false
example: "This is a mount that's used by the plugin."
Settable:
type: "array"
items:
type: "string"
Source:
type: "string"
example: "/var/lib/docker/plugins/"
Destination:
type: "string"
x-nullable: false
example: "/mnt/state"
Type:
type: "string"
x-nullable: false
example: "bind"
Options:
type: "array"
items:
type: "string"
example:
- "rbind"
- "rw"
PluginDevice:
type: "object"
required: [Name, Description, Settable, Path]
x-nullable: false
properties:
Name:
type: "string"
x-nullable: false
Description:
type: "string"
x-nullable: false
Settable:
type: "array"
items:
type: "string"
Path:
type: "string"
example: "/dev/fuse"
PluginEnv:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
Description:
x-nullable: false
type: "string"
Settable:
type: "array"
items:
type: "string"
Value:
type: "string"
PluginInterfaceType:
type: "object"
x-nullable: false
required: [Prefix, Capability, Version]
properties:
Prefix:
type: "string"
x-nullable: false
Capability:
type: "string"
x-nullable: false
Version:
type: "string"
x-nullable: false
PluginPrivilege:
description: |
Describes a permission the user has to accept upon installing
the plugin.
type: "object"
x-go-name: "PluginPrivilege"
properties:
Name:
type: "string"
example: "network"
Description:
type: "string"
Value:
type: "array"
items:
type: "string"
example:
- "host"
Plugin:
description: "A plugin for the Engine API"
type: "object"
required: [Settings, Enabled, Config, Name]
properties:
Id:
type: "string"
example: "5724e2c8652da337ab2eedd19fc6fc0ec908e4bd907c7421bf6a8dfc70c4c078"
Name:
type: "string"
x-nullable: false
example: "tiborvass/sample-volume-plugin"
Enabled:
description:
True if the plugin is running. False if the plugin is not running,
only installed.
type: "boolean"
x-nullable: false
example: true
Settings:
description: "Settings that can be modified by users."
type: "object"
x-nullable: false
required: [Args, Devices, Env, Mounts]
properties:
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
type: "string"
example:
- "DEBUG=0"
Args:
type: "array"
items:
type: "string"
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PluginReference:
description: "plugin remote reference used to push/pull the plugin"
type: "string"
x-nullable: false
example: "localhost:5000/tiborvass/sample-volume-plugin:latest"
Config:
description: "The config of a plugin."
type: "object"
x-nullable: false
required:
- Description
- Documentation
- Interface
- Entrypoint
- WorkDir
- Network
- Linux
- PidHost
- PropagatedMount
- IpcHost
- Mounts
- Env
- Args
properties:
DockerVersion:
description: "Docker Version used to create the plugin"
type: "string"
x-nullable: false
example: "17.06.0-ce"
Description:
type: "string"
x-nullable: false
example: "A sample volume plugin for Docker"
Documentation:
type: "string"
x-nullable: false
example: "https://docs.docker.com/engine/extend/plugins/"
Interface:
description: "The interface between Docker and the plugin"
x-nullable: false
type: "object"
required: [Types, Socket]
properties:
Types:
type: "array"
items:
$ref: "#/definitions/PluginInterfaceType"
example:
- "docker.volumedriver/1.0"
Socket:
type: "string"
x-nullable: false
example: "plugins.sock"
ProtocolScheme:
type: "string"
example: "some.protocol/v1.0"
description: "Protocol to use for clients connecting to the plugin."
enum:
- ""
- "moby.plugins.http/v1"
Entrypoint:
type: "array"
items:
type: "string"
example:
- "/usr/bin/sample-volume-plugin"
- "/data"
WorkDir:
type: "string"
x-nullable: false
example: "/bin/"
User:
type: "object"
x-nullable: false
properties:
UID:
type: "integer"
format: "uint32"
example: 1000
GID:
type: "integer"
format: "uint32"
example: 1000
Network:
type: "object"
x-nullable: false
required: [Type]
properties:
Type:
x-nullable: false
type: "string"
example: "host"
Linux:
type: "object"
x-nullable: false
required: [Capabilities, AllowAllDevices, Devices]
properties:
Capabilities:
type: "array"
items:
type: "string"
example:
- "CAP_SYS_ADMIN"
- "CAP_SYSLOG"
AllowAllDevices:
type: "boolean"
x-nullable: false
example: false
Devices:
type: "array"
items:
$ref: "#/definitions/PluginDevice"
PropagatedMount:
type: "string"
x-nullable: false
example: "/mnt/volumes"
IpcHost:
type: "boolean"
x-nullable: false
example: false
PidHost:
type: "boolean"
x-nullable: false
example: false
Mounts:
type: "array"
items:
$ref: "#/definitions/PluginMount"
Env:
type: "array"
items:
$ref: "#/definitions/PluginEnv"
example:
- Name: "DEBUG"
Description: "If set, prints debug messages"
Settable: null
Value: "0"
Args:
type: "object"
x-nullable: false
required: [Name, Description, Settable, Value]
properties:
Name:
x-nullable: false
type: "string"
example: "args"
Description:
x-nullable: false
type: "string"
example: "command line arguments"
Settable:
type: "array"
items:
type: "string"
Value:
type: "array"
items:
type: "string"
rootfs:
type: "object"
properties:
type:
type: "string"
example: "layers"
diff_ids:
type: "array"
items:
type: "string"
example:
- "sha256:675532206fbf3030b8458f88d6e26d4eb1577688a25efec97154c94e8b6b4887"
- "sha256:e216a057b1cb1efc11f8a268f37ef62083e70b1b38323ba252e25ac88904a7e8"
ObjectVersion:
description: |
The version number of the object such as node, service, etc. This is needed
to avoid conflicting writes. The client must send the version number along
with the modified specification when updating these objects.
This approach ensures safe concurrency and determinism in that the change
on the object may not be applied if the version number has changed from the
last read. In other words, if two update requests specify the same base
version, only one of the requests can succeed. As a result, two separate
update requests that happen at the same time will not unintentionally
overwrite each other.
type: "object"
properties:
Index:
type: "integer"
format: "uint64"
example: 373531
NodeSpec:
type: "object"
properties:
Name:
description: "Name for the node."
type: "string"
example: "my-node"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Role:
description: "Role of the node."
type: "string"
enum:
- "worker"
- "manager"
example: "manager"
Availability:
description: "Availability of the node."
type: "string"
enum:
- "active"
- "pause"
- "drain"
example: "active"
example:
Availability: "active"
Name: "node-name"
Role: "manager"
Labels:
foo: "bar"
Node:
type: "object"
properties:
ID:
type: "string"
example: "24ifsmvkjbyhk"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the node was added to the swarm in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the node was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/NodeSpec"
Description:
$ref: "#/definitions/NodeDescription"
Status:
$ref: "#/definitions/NodeStatus"
ManagerStatus:
$ref: "#/definitions/ManagerStatus"
NodeDescription:
description: |
NodeDescription encapsulates the properties of the Node as reported by the
agent.
type: "object"
properties:
Hostname:
type: "string"
example: "bf3067039e47"
Platform:
$ref: "#/definitions/Platform"
Resources:
$ref: "#/definitions/ResourceObject"
Engine:
$ref: "#/definitions/EngineDescription"
TLSInfo:
$ref: "#/definitions/TLSInfo"
Platform:
description: |
Platform represents the platform (Arch/OS).
type: "object"
properties:
Architecture:
description: |
Architecture represents the hardware architecture (for example,
`x86_64`).
type: "string"
example: "x86_64"
OS:
description: |
OS represents the Operating System (for example, `linux` or `windows`).
type: "string"
example: "linux"
EngineDescription:
description: "EngineDescription provides information about an engine."
type: "object"
properties:
EngineVersion:
type: "string"
example: "17.06.0"
Labels:
type: "object"
additionalProperties:
type: "string"
example:
foo: "bar"
Plugins:
type: "array"
items:
type: "object"
properties:
Type:
type: "string"
Name:
type: "string"
example:
- Type: "Log"
Name: "awslogs"
- Type: "Log"
Name: "fluentd"
- Type: "Log"
Name: "gcplogs"
- Type: "Log"
Name: "gelf"
- Type: "Log"
Name: "journald"
- Type: "Log"
Name: "json-file"
- Type: "Log"
Name: "logentries"
- Type: "Log"
Name: "splunk"
- Type: "Log"
Name: "syslog"
- Type: "Network"
Name: "bridge"
- Type: "Network"
Name: "host"
- Type: "Network"
Name: "ipvlan"
- Type: "Network"
Name: "macvlan"
- Type: "Network"
Name: "null"
- Type: "Network"
Name: "overlay"
- Type: "Volume"
Name: "local"
- Type: "Volume"
Name: "localhost:5000/vieux/sshfs:latest"
- Type: "Volume"
Name: "vieux/sshfs:latest"
TLSInfo:
description: |
Information about the issuer of leaf TLS certificates and the trusted root
CA certificate.
type: "object"
properties:
TrustRoot:
description: |
The root CA certificate(s) that are used to validate leaf TLS
certificates.
type: "string"
CertIssuerSubject:
description:
The base64-url-safe-encoded raw subject bytes of the issuer.
type: "string"
CertIssuerPublicKey:
description: |
The base64-url-safe-encoded raw public key bytes of the issuer.
type: "string"
example:
TrustRoot: |
-----BEGIN CERTIFICATE-----
MIIBajCCARCgAwIBAgIUbYqrLSOSQHoxD8CwG6Bi2PJi9c8wCgYIKoZIzj0EAwIw
EzERMA8GA1UEAxMIc3dhcm0tY2EwHhcNMTcwNDI0MjE0MzAwWhcNMzcwNDE5MjE0
MzAwWjATMREwDwYDVQQDEwhzd2FybS1jYTBZMBMGByqGSM49AgEGCCqGSM49AwEH
A0IABJk/VyMPYdaqDXJb/VXh5n/1Yuv7iNrxV3Qb3l06XD46seovcDWs3IZNV1lf
3Skyr0ofcchipoiHkXBODojJydSjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMB
Af8EBTADAQH/MB0GA1UdDgQWBBRUXxuRcnFjDfR/RIAUQab8ZV/n4jAKBggqhkjO
PQQDAgNIADBFAiAy+JTe6Uc3KyLCMiqGl2GyWGQqQDEcO3/YG36x7om65AIhAJvz
pxv6zFeVEkAEEkqIYi0omA9+CjanB/6Bz4n1uw8H
-----END CERTIFICATE-----
CertIssuerSubject: "MBMxETAPBgNVBAMTCHN3YXJtLWNh"
CertIssuerPublicKey: "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEmT9XIw9h1qoNclv9VeHmf/Vi6/uI2vFXdBveXTpcPjqx6i9wNazchk1XWV/dKTKvSh9xyGKmiIeRcE4OiMnJ1A=="
NodeStatus:
description: |
NodeStatus represents the status of a node.
It provides the current status of the node, as seen by the manager.
type: "object"
properties:
State:
$ref: "#/definitions/NodeState"
Message:
type: "string"
example: ""
Addr:
description: "IP address of the node."
type: "string"
example: "172.17.0.2"
NodeState:
description: "NodeState represents the state of a node."
type: "string"
enum:
- "unknown"
- "down"
- "ready"
- "disconnected"
example: "ready"
ManagerStatus:
description: |
ManagerStatus represents the status of a manager.
It provides the current status of a node's manager component, if the node
is a manager.
x-nullable: true
type: "object"
properties:
Leader:
type: "boolean"
default: false
example: true
Reachability:
$ref: "#/definitions/Reachability"
Addr:
description: |
The IP address and port at which the manager is reachable.
type: "string"
example: "10.0.0.46:2377"
Reachability:
description: "Reachability represents the reachability of a node."
type: "string"
enum:
- "unknown"
- "unreachable"
- "reachable"
example: "reachable"
SwarmSpec:
description: "User modifiable swarm configuration."
type: "object"
properties:
Name:
description: "Name of the swarm."
type: "string"
example: "default"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.corp.type: "production"
com.example.corp.department: "engineering"
Orchestration:
description: "Orchestration configuration."
type: "object"
x-nullable: true
properties:
TaskHistoryRetentionLimit:
description: |
The number of historic tasks to keep per instance or node. If
negative, never remove completed or failed tasks.
type: "integer"
format: "int64"
example: 10
Raft:
description: "Raft configuration."
type: "object"
properties:
SnapshotInterval:
description: "The number of log entries between snapshots."
type: "integer"
format: "uint64"
example: 10000
KeepOldSnapshots:
description: |
The number of snapshots to keep beyond the current snapshot.
type: "integer"
format: "uint64"
LogEntriesForSlowFollowers:
description: |
The number of log entries to keep around to sync up slow followers
after a snapshot is created.
type: "integer"
format: "uint64"
example: 500
ElectionTick:
description: |
The number of ticks that a follower will wait for a message from
the leader before becoming a candidate and starting an election.
`ElectionTick` must be greater than `HeartbeatTick`.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 3
HeartbeatTick:
description: |
The number of ticks between heartbeats. Every HeartbeatTick ticks,
the leader will send a heartbeat to the followers.
A tick currently defaults to one second, so these translate
directly to seconds currently, but this is NOT guaranteed.
type: "integer"
example: 1
Dispatcher:
description: "Dispatcher configuration."
type: "object"
x-nullable: true
properties:
HeartbeatPeriod:
description: |
The delay for an agent to send a heartbeat to the dispatcher.
type: "integer"
format: "int64"
example: 5000000000
CAConfig:
description: "CA configuration."
type: "object"
x-nullable: true
properties:
NodeCertExpiry:
description: "The duration node certificates are issued for."
type: "integer"
format: "int64"
example: 7776000000000000
ExternalCAs:
description: |
Configuration for forwarding signing requests to an external
certificate authority.
type: "array"
items:
type: "object"
properties:
Protocol:
description: |
Protocol for communication with the external CA (currently
only `cfssl` is supported).
type: "string"
enum:
- "cfssl"
default: "cfssl"
URL:
description: |
URL where certificate signing requests should be sent.
type: "string"
Options:
description: |
An object with key/value pairs that are interpreted as
protocol-specific options for the external CA driver.
type: "object"
additionalProperties:
type: "string"
CACert:
description: |
The root CA certificate (in PEM format) this external CA uses
to issue TLS certificates (assumed to be to the current swarm
root CA certificate if not provided).
type: "string"
SigningCACert:
description: |
The desired signing CA certificate for all swarm node TLS leaf
certificates, in PEM format.
type: "string"
SigningCAKey:
description: |
The desired signing CA key for all swarm node TLS leaf certificates,
in PEM format.
type: "string"
ForceRotate:
description: |
An integer whose purpose is to force swarm to generate a new
signing CA certificate and key, if none have been specified in
`SigningCACert` and `SigningCAKey`
format: "uint64"
type: "integer"
EncryptionConfig:
description: "Parameters related to encryption-at-rest."
type: "object"
properties:
AutoLockManagers:
description: |
If set, generate a key and use it to lock data stored on the
managers.
type: "boolean"
example: false
TaskDefaults:
description: "Defaults for creating tasks in this cluster."
type: "object"
properties:
LogDriver:
description: |
The log driver to use for tasks created in the orchestrator if
unspecified by a service.
Updating this value only affects new tasks. Existing tasks continue
to use their previously configured log driver until recreated.
type: "object"
properties:
Name:
description: |
The log driver to use as a default for new tasks.
type: "string"
example: "json-file"
Options:
description: |
Driver-specific options for the selectd log driver, specified
as key/value pairs.
type: "object"
additionalProperties:
type: "string"
example:
"max-file": "10"
"max-size": "100m"
# The Swarm information for `GET /info`. It is the same as `GET /swarm`, but
# without `JoinTokens`.
ClusterInfo:
description: |
ClusterInfo represents information about the swarm as is returned by the
"/info" endpoint. Join-tokens are not included.
x-nullable: true
type: "object"
properties:
ID:
description: "The ID of the swarm."
type: "string"
example: "abajmipo7b4xz5ip2nrla6b11"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
description: |
Date and time at which the swarm was initialised in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2016-08-18T10:44:24.496525531Z"
UpdatedAt:
description: |
Date and time at which the swarm was last updated in
[RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format with nano-seconds.
type: "string"
format: "dateTime"
example: "2017-08-09T07:09:37.632105588Z"
Spec:
$ref: "#/definitions/SwarmSpec"
TLSInfo:
$ref: "#/definitions/TLSInfo"
RootRotationInProgress:
description: |
Whether there is currently a root CA rotation in progress for the swarm
type: "boolean"
example: false
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
If no port is set or is set to 0, the default port (4789) is used.
type: "integer"
format: "uint32"
default: 4789
example: 4789
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global scope
networks.
type: "array"
items:
type: "string"
format: "CIDR"
example: ["10.10.0.0/16", "20.20.0.0/16"]
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created from the
default subnet pool.
type: "integer"
format: "uint32"
maximum: 29
default: 24
example: 24
JoinTokens:
description: |
JoinTokens contains the tokens workers and managers need to join the swarm.
type: "object"
properties:
Worker:
description: |
The token workers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx"
Manager:
description: |
The token managers can use to join the swarm.
type: "string"
example: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
Swarm:
type: "object"
allOf:
- $ref: "#/definitions/ClusterInfo"
- type: "object"
properties:
JoinTokens:
$ref: "#/definitions/JoinTokens"
TaskSpec:
description: "User modifiable task configuration."
type: "object"
properties:
PluginSpec:
type: "object"
description: |
Plugin spec for the service. *(Experimental release only.)*
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Name:
description: "The name or 'alias' to use for the plugin."
type: "string"
Remote:
description: "The plugin image reference to use."
type: "string"
Disabled:
description: "Disable the plugin once scheduled."
type: "boolean"
PluginPrivilege:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
ContainerSpec:
type: "object"
description: |
Container spec for the service.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
properties:
Image:
description: "The image name to use for the container"
type: "string"
Labels:
description: "User-defined key/value data."
type: "object"
additionalProperties:
type: "string"
Command:
description: "The command to be run in the image."
type: "array"
items:
type: "string"
Args:
description: "Arguments to the command."
type: "array"
items:
type: "string"
Hostname:
description: |
The hostname to use for the container, as a valid
[RFC 1123](https://tools.ietf.org/html/rfc1123) hostname.
type: "string"
Env:
description: |
A list of environment variables in the form `VAR=value`.
type: "array"
items:
type: "string"
Dir:
description: "The working directory for commands to run in."
type: "string"
User:
description: "The user inside the container."
type: "string"
Groups:
type: "array"
description: |
A list of additional groups that the container process will run as.
items:
type: "string"
Privileges:
type: "object"
description: "Security options for the container"
properties:
CredentialSpec:
type: "object"
description: "CredentialSpec for managed service account (Windows only)"
properties:
Config:
type: "string"
example: "0bt9dmxjvjiqermk6xrop3ekq"
description: |
Load credential spec from a Swarm Config with the given ID.
The specified config must also be present in the Configs
field with the Runtime property set.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
File:
type: "string"
example: "spec.json"
description: |
Load credential spec from this file. The file is read by
the daemon, and must be present in the `CredentialSpecs`
subdirectory in the docker data directory, which defaults
to `C:\ProgramData\Docker\` on Windows.
For example, specifying `spec.json` loads
`C:\ProgramData\Docker\CredentialSpecs\spec.json`.
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
Registry:
type: "string"
description: |
Load credential spec from this value in the Windows
registry. The specified registry value must be located in:
`HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\Containers\CredentialSpecs`
<p><br /></p>
> **Note**: `CredentialSpec.File`, `CredentialSpec.Registry`,
> and `CredentialSpec.Config` are mutually exclusive.
SELinuxContext:
type: "object"
description: "SELinux labels of the container"
properties:
Disable:
type: "boolean"
description: "Disable SELinux"
User:
type: "string"
description: "SELinux user label"
Role:
type: "string"
description: "SELinux role label"
Type:
type: "string"
description: "SELinux type label"
Level:
type: "string"
description: "SELinux level label"
TTY:
description: "Whether a pseudo-TTY should be allocated."
type: "boolean"
OpenStdin:
description: "Open `stdin`"
type: "boolean"
ReadOnly:
description: "Mount the container's root filesystem as read only."
type: "boolean"
Mounts:
description: |
Specification for mounts to be added to containers created as part
of the service.
type: "array"
items:
$ref: "#/definitions/Mount"
StopSignal:
description: "Signal to stop the container."
type: "string"
StopGracePeriod:
description: |
Amount of time to wait for the container to terminate before
forcefully killing it.
type: "integer"
format: "int64"
HealthCheck:
$ref: "#/definitions/HealthConfig"
Hosts:
type: "array"
description: |
A list of hostname/IP mappings to add to the container's `hosts`
file. The format of extra hosts is specified in the
[hosts(5)](http://man7.org/linux/man-pages/man5/hosts.5.html)
man page:
IP_address canonical_hostname [aliases...]
items:
type: "string"
DNSConfig:
description: |
Specification for DNS related configurations in resolver configuration
file (`resolv.conf`).
type: "object"
properties:
Nameservers:
description: "The IP addresses of the name servers."
type: "array"
items:
type: "string"
Search:
description: "A search list for host-name lookup."
type: "array"
items:
type: "string"
Options:
description: |
A list of internal resolver variables to be modified (e.g.,
`debug`, `ndots:3`, etc.).
type: "array"
items:
type: "string"
Secrets:
description: |
Secrets contains references to zero or more secrets that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
SecretID:
description: |
SecretID represents the ID of the specific secret that we're
referencing.
type: "string"
SecretName:
description: |
SecretName is the name of the secret that this references,
but this is just provided for lookup/display purposes. The
secret in the reference will be identified by its ID.
type: "string"
Configs:
description: |
Configs contains references to zero or more configs that will be
exposed to the service.
type: "array"
items:
type: "object"
properties:
File:
description: |
File represents a specific target that is backed by a file.
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually exclusive
type: "object"
properties:
Name:
description: |
Name represents the final filename in the filesystem.
type: "string"
UID:
description: "UID represents the file UID."
type: "string"
GID:
description: "GID represents the file GID."
type: "string"
Mode:
description: "Mode represents the FileMode of the file."
type: "integer"
format: "uint32"
Runtime:
description: |
Runtime represents a target that is not mounted into the
container but is used by the task
<p><br /><p>
> **Note**: `Configs.File` and `Configs.Runtime` are mutually
> exclusive
type: "object"
ConfigID:
description: |
ConfigID represents the ID of the specific config that we're
referencing.
type: "string"
ConfigName:
description: |
ConfigName is the name of the config that this references,
but this is just provided for lookup/display purposes. The
config in the reference will be identified by its ID.
type: "string"
Isolation:
type: "string"
description: |
Isolation technology of the containers running the service.
(Windows only)
enum:
- "default"
- "process"
- "hyperv"
Init:
description: |
Run an init inside the container that forwards signals and reaps
processes. This field is omitted if empty, and the default (as
configured on the daemon) is used.
type: "boolean"
x-nullable: true
Sysctls:
description: |
Set kernel namedspaced parameters (sysctls) in the container.
The Sysctls option on services accepts the same sysctls as the
are supported on containers. Note that while the same sysctls are
supported, no guarantees or checks are made about their
suitability for a clustered environment, and it's up to the user
to determine whether a given sysctl will work properly in a
Service.
type: "object"
additionalProperties:
type: "string"
# This option is not used by Windows containers
CapabilityAdd:
type: "array"
description: |
A list of kernel capabilities to add to the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
- "CAP_SYS_ADMIN"
- "CAP_SYS_CHROOT"
- "CAP_SYSLOG"
CapabilityDrop:
type: "array"
description: |
A list of kernel capabilities to drop from the default set
for the container.
items:
type: "string"
example:
- "CAP_NET_RAW"
Ulimits:
description: |
A list of resource limits to set in the container. For example: `{"Name": "nofile", "Soft": 1024, "Hard": 2048}`"
type: "array"
items:
type: "object"
properties:
Name:
description: "Name of ulimit"
type: "string"
Soft:
description: "Soft limit"
type: "integer"
Hard:
description: "Hard limit"
type: "integer"
NetworkAttachmentSpec:
description: |
Read-only spec type for non-swarm containers attached to swarm overlay
networks.
<p><br /></p>
> **Note**: ContainerSpec, NetworkAttachmentSpec, and PluginSpec are
> mutually exclusive. PluginSpec is only used when the Runtime field
> is set to `plugin`. NetworkAttachmentSpec is used when the Runtime
> field is set to `attachment`.
type: "object"
properties:
ContainerID:
description: "ID of the container represented by this task"
type: "string"
Resources:
description: |
Resource requirements which apply to each individual container created
as part of the service.
type: "object"
properties:
Limits:
description: "Define resources limits."
$ref: "#/definitions/Limit"
Reservation:
description: "Define resources reservation."
$ref: "#/definitions/ResourceObject"
RestartPolicy:
description: |
Specification for the restart policy which applies to containers
created as part of this service.
type: "object"
properties:
Condition:
description: "Condition for restart."
type: "string"
enum:
- "none"
- "on-failure"
- "any"
Delay:
description: "Delay between restart attempts."
type: "integer"
format: "int64"
MaxAttempts:
description: |
Maximum attempts to restart a given container before giving up
(default value is 0, which is ignored).
type: "integer"
format: "int64"
default: 0
Window:
description: |
Windows is the time window used to evaluate the restart policy
(default value is 0, which is unbounded).
type: "integer"
format: "int64"
default: 0
Placement:
type: "object"
properties:
Constraints:
description: |
An array of constraint expressions to limit the set of nodes where
a task can be scheduled. Constraint expressions can either use a
_match_ (`==`) or _exclude_ (`!=`) rule. Multiple constraints find
nodes that satisfy every expression (AND match). Constraints can
match node or Docker Engine labels as follows:
node attribute | matches | example
---------------------|--------------------------------|-----------------------------------------------
`node.id` | Node ID | `node.id==2ivku8v2gvtg4`
`node.hostname` | Node hostname | `node.hostname!=node-2`
`node.role` | Node role (`manager`/`worker`) | `node.role==manager`
`node.platform.os` | Node operating system | `node.platform.os==windows`
`node.platform.arch` | Node architecture | `node.platform.arch==x86_64`
`node.labels` | User-defined node labels | `node.labels.security==high`
`engine.labels` | Docker Engine's labels | `engine.labels.operatingsystem==ubuntu-14.04`
`engine.labels` apply to Docker Engine labels like operating system,
drivers, etc. Swarm administrators add `node.labels` for operational
purposes by using the [`node update endpoint`](#operation/NodeUpdate).
type: "array"
items:
type: "string"
example:
- "node.hostname!=node3.corp.example.com"
- "node.role!=manager"
- "node.labels.type==production"
- "node.platform.os==linux"
- "node.platform.arch==x86_64"
Preferences:
description: |
Preferences provide a way to make the scheduler aware of factors
such as topology. They are provided in order from highest to
lowest precedence.
type: "array"
items:
type: "object"
properties:
Spread:
type: "object"
properties:
SpreadDescriptor:
description: |
label descriptor, such as `engine.labels.az`.
type: "string"
example:
- Spread:
SpreadDescriptor: "node.labels.datacenter"
- Spread:
SpreadDescriptor: "node.labels.rack"
MaxReplicas:
description: |
Maximum number of replicas for per node (default value is 0, which
is unlimited)
type: "integer"
format: "int64"
default: 0
Platforms:
description: |
Platforms stores all the platforms that the service's image can
run on. This field is used in the platform filter for scheduling.
If empty, then the platform filter is off, meaning there are no
scheduling restrictions.
type: "array"
items:
$ref: "#/definitions/Platform"
ForceUpdate:
description: |
A counter that triggers an update even if no relevant parameters have
been changed.
type: "integer"
Runtime:
description: |
Runtime is the type of runtime specified for the task executor.
type: "string"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
LogDriver:
description: |
Specifies the log driver to use for tasks created from this spec. If
not present, the default one for the swarm will be used, finally
falling back to the engine default if not specified.
type: "object"
properties:
Name:
type: "string"
Options:
type: "object"
additionalProperties:
type: "string"
TaskState:
type: "string"
enum:
- "new"
- "allocated"
- "pending"
- "assigned"
- "accepted"
- "preparing"
- "ready"
- "starting"
- "running"
- "complete"
- "shutdown"
- "failed"
- "rejected"
- "remove"
- "orphaned"
Task:
type: "object"
properties:
ID:
description: "The ID of the task."
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Name:
description: "Name of the task."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Spec:
$ref: "#/definitions/TaskSpec"
ServiceID:
description: "The ID of the service this task is part of."
type: "string"
Slot:
type: "integer"
NodeID:
description: "The ID of the node that this task is on."
type: "string"
AssignedGenericResources:
$ref: "#/definitions/GenericResources"
Status:
type: "object"
properties:
Timestamp:
type: "string"
format: "dateTime"
State:
$ref: "#/definitions/TaskState"
Message:
type: "string"
Err:
type: "string"
ContainerStatus:
type: "object"
properties:
ContainerID:
type: "string"
PID:
type: "integer"
ExitCode:
type: "integer"
DesiredState:
$ref: "#/definitions/TaskState"
JobIteration:
description: |
If the Service this Task belongs to is a job-mode service, contains
the JobIteration of the Service this Task was created for. Absent if
the Task was created for a Replicated or Global Service.
$ref: "#/definitions/ObjectVersion"
example:
ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
AssignedGenericResources:
- DiscreteResourceSpec:
Kind: "SSD"
Value: 3
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID1"
- NamedResourceSpec:
Kind: "GPU"
Value: "UUID2"
ServiceSpec:
description: "User modifiable configuration for a service."
type: object
properties:
Name:
description: "Name of the service."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
TaskTemplate:
$ref: "#/definitions/TaskSpec"
Mode:
description: "Scheduling mode for the service."
type: "object"
properties:
Replicated:
type: "object"
properties:
Replicas:
type: "integer"
format: "int64"
Global:
type: "object"
ReplicatedJob:
description: |
The mode used for services with a finite number of tasks that run
to a completed state.
type: "object"
properties:
MaxConcurrent:
description: |
The maximum number of replicas to run simultaneously.
type: "integer"
format: "int64"
default: 1
TotalCompletions:
description: |
The total number of replicas desired to reach the Completed
state. If unset, will default to the value of `MaxConcurrent`
type: "integer"
format: "int64"
GlobalJob:
description: |
The mode used for services which run a task to the completed state
on each valid node.
type: "object"
UpdateConfig:
description: "Specification for the update strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be updated in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: "Amount of time between updates, in nanoseconds."
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an updated task fails to run, or stops running
during the update.
type: "string"
enum:
- "continue"
- "pause"
- "rollback"
Monitor:
description: |
Amount of time to monitor each updated task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during an update before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling out an updated task. Either
the old task is shut down before the new task is started, or the
new task is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
RollbackConfig:
description: "Specification for the rollback strategy of the service."
type: "object"
properties:
Parallelism:
description: |
Maximum number of tasks to be rolled back in one iteration (0 means
unlimited parallelism).
type: "integer"
format: "int64"
Delay:
description: |
Amount of time between rollback iterations, in nanoseconds.
type: "integer"
format: "int64"
FailureAction:
description: |
Action to take if an rolled back task fails to run, or stops
running during the rollback.
type: "string"
enum:
- "continue"
- "pause"
Monitor:
description: |
Amount of time to monitor each rolled back task for failures, in
nanoseconds.
type: "integer"
format: "int64"
MaxFailureRatio:
description: |
The fraction of tasks that may fail during a rollback before the
failure action is invoked, specified as a floating point number
between 0 and 1.
type: "number"
default: 0
Order:
description: |
The order of operations when rolling back a task. Either the old
task is shut down before the new task is started, or the new task
is started before the old task is shut down.
type: "string"
enum:
- "stop-first"
- "start-first"
Networks:
description: "Specifies which networks the service should attach to."
type: "array"
items:
$ref: "#/definitions/NetworkAttachmentConfig"
EndpointSpec:
$ref: "#/definitions/EndpointSpec"
EndpointPortConfig:
type: "object"
properties:
Name:
type: "string"
Protocol:
type: "string"
enum:
- "tcp"
- "udp"
- "sctp"
TargetPort:
description: "The port inside the container."
type: "integer"
PublishedPort:
description: "The port on the swarm hosts."
type: "integer"
PublishMode:
description: |
The mode in which port is published.
<p><br /></p>
- "ingress" makes the target port accessible on every node,
regardless of whether there is a task for the service running on
that node or not.
- "host" bypasses the routing mesh and publish the port directly on
the swarm node where that service is running.
type: "string"
enum:
- "ingress"
- "host"
default: "ingress"
example: "ingress"
EndpointSpec:
description: "Properties that can be configured to access and load balance a service."
type: "object"
properties:
Mode:
description: |
The mode of resolution to use for internal load balancing between tasks.
type: "string"
enum:
- "vip"
- "dnsrr"
default: "vip"
Ports:
description: |
List of exposed ports that this service is accessible on from the
outside. Ports can only be provided if `vip` resolution mode is used.
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
Service:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ServiceSpec"
Endpoint:
type: "object"
properties:
Spec:
$ref: "#/definitions/EndpointSpec"
Ports:
type: "array"
items:
$ref: "#/definitions/EndpointPortConfig"
VirtualIPs:
type: "array"
items:
type: "object"
properties:
NetworkID:
type: "string"
Addr:
type: "string"
UpdateStatus:
description: "The status of a service update."
type: "object"
properties:
State:
type: "string"
enum:
- "updating"
- "paused"
- "completed"
StartedAt:
type: "string"
format: "dateTime"
CompletedAt:
type: "string"
format: "dateTime"
Message:
type: "string"
ServiceStatus:
description: |
The status of the service's tasks. Provided only when requested as
part of a ServiceList operation.
type: "object"
properties:
RunningTasks:
description: |
The number of tasks for the service currently in the Running state.
type: "integer"
format: "uint64"
example: 7
DesiredTasks:
description: |
The number of tasks for the service desired to be running.
For replicated services, this is the replica count from the
service spec. For global services, this is computed by taking
count of all tasks for the service with a Desired State other
than Shutdown.
type: "integer"
format: "uint64"
example: 10
CompletedTasks:
description: |
The number of tasks for a job that are in the Completed state.
This field must be cross-referenced with the service type, as the
value of 0 may mean the service is not in a job mode, or it may
mean the job-mode service has no tasks yet Completed.
type: "integer"
format: "uint64"
JobStatus:
description: |
The status of the service when it is in one of ReplicatedJob or
GlobalJob modes. Absent on Replicated and Global mode services. The
JobIteration is an ObjectVersion, but unlike the Service's version,
does not need to be sent with an update request.
type: "object"
properties:
JobIteration:
description: |
JobIteration is a value increased each time a Job is executed,
successfully or otherwise. "Executed", in this case, means the
job as a whole has been started, not that an individual Task has
been launched. A job is "Executed" when its ServiceSpec is
updated. JobIteration can be used to disambiguate Tasks belonging
to different executions of a job. Though JobIteration will
increase with each subsequent execution, it may not necessarily
increase by 1, and so JobIteration should not be used to
$ref: "#/definitions/ObjectVersion"
LastExecution:
description: |
The last time, as observed by the server, that this job was
started.
type: "string"
format: "dateTime"
example:
ID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Version:
Index: 19
CreatedAt: "2016-06-07T21:05:51.880065305Z"
UpdatedAt: "2016-06-07T21:07:29.962229872Z"
Spec:
Name: "hopeful_cori"
TaskTemplate:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Endpoint:
Spec:
Mode: "vip"
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
Ports:
-
Protocol: "tcp"
TargetPort: 6379
PublishedPort: 30001
VirtualIPs:
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.2/16"
-
NetworkID: "4qvuz4ko70xaltuqbt8956gd1"
Addr: "10.255.0.3/16"
ImageDeleteResponseItem:
type: "object"
properties:
Untagged:
description: "The image ID of an image that was untagged"
type: "string"
Deleted:
description: "The image ID of an image that was deleted"
type: "string"
ServiceUpdateResponse:
type: "object"
properties:
Warnings:
description: "Optional warning messages"
type: "array"
items:
type: "string"
example:
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
ContainerSummary:
type: "object"
properties:
Id:
description: "The ID of this container"
type: "string"
x-go-name: "ID"
Names:
description: "The names that this container has been given"
type: "array"
items:
type: "string"
Image:
description: "The name of the image used when creating this container"
type: "string"
ImageID:
description: "The ID of the image that this container was created from"
type: "string"
Command:
description: "Command to run when starting the container"
type: "string"
Created:
description: "When the container was created"
type: "integer"
format: "int64"
Ports:
description: "The ports exposed by this container"
type: "array"
items:
$ref: "#/definitions/Port"
SizeRw:
description: "The size of files that have been created or changed by this container"
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container"
type: "integer"
format: "int64"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
State:
description: "The state of this container (e.g. `Exited`)"
type: "string"
Status:
description: "Additional human-readable status of this container (e.g. `Exit 0`)"
type: "string"
HostConfig:
type: "object"
properties:
NetworkMode:
type: "string"
NetworkSettings:
description: "A summary of the container's network settings"
type: "object"
properties:
Networks:
type: "object"
additionalProperties:
$ref: "#/definitions/EndpointSettings"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Driver:
description: "Driver represents a driver (network, logging, secrets)."
type: "object"
required: [Name]
properties:
Name:
description: "Name of the driver."
type: "string"
x-nullable: false
example: "some-driver"
Options:
description: "Key/value map of driver-specific options."
type: "object"
x-nullable: false
additionalProperties:
type: "string"
example:
OptionA: "value for driver-specific option A"
OptionB: "value for driver-specific option B"
SecretSpec:
type: "object"
properties:
Name:
description: "User-defined name of the secret."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
data to store as secret.
This field is only used to _create_ a secret, and is not returned by
other endpoints.
type: "string"
example: ""
Driver:
description: |
Name of the secrets driver used to fetch the secret's value from an
external secret store.
$ref: "#/definitions/Driver"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Secret:
type: "object"
properties:
ID:
type: "string"
example: "blt1owaxmitz71s9v5zh81zun"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
UpdatedAt:
type: "string"
format: "dateTime"
example: "2017-07-20T13:55:28.678958722Z"
Spec:
$ref: "#/definitions/SecretSpec"
ConfigSpec:
type: "object"
properties:
Name:
description: "User-defined name of the config."
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
Data:
description: |
Base64-url-safe-encoded ([RFC 4648](https://tools.ietf.org/html/rfc4648#section-5))
config data.
type: "string"
Templating:
description: |
Templating driver, if applicable
Templating controls whether and how to evaluate the config payload as
a template. If no driver is set, no templating is used.
$ref: "#/definitions/Driver"
Config:
type: "object"
properties:
ID:
type: "string"
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ConfigSpec"
ContainerState:
description: |
ContainerState stores container's running state. It's part of ContainerJSONBase
and will be returned by the "inspect" command.
type: "object"
x-nullable: true
properties:
Status:
description: |
String representation of the container state. Can be one of "created",
"running", "paused", "restarting", "removing", "exited", or "dead".
type: "string"
enum: ["created", "running", "paused", "restarting", "removing", "exited", "dead"]
example: "running"
Running:
description: |
Whether this container is running.
Note that a running container can be _paused_. The `Running` and `Paused`
booleans are not mutually exclusive:
When pausing a container (on Linux), the freezer cgroup is used to suspend
all processes in the container. Freezing the process requires the process to
be running. As a result, paused containers are both `Running` _and_ `Paused`.
Use the `Status` field instead to determine if a container's state is "running".
type: "boolean"
example: true
Paused:
description: "Whether this container is paused."
type: "boolean"
example: false
Restarting:
description: "Whether this container is restarting."
type: "boolean"
example: false
OOMKilled:
description: |
Whether this container has been killed because it ran out of memory.
type: "boolean"
example: false
Dead:
type: "boolean"
example: false
Pid:
description: "The process ID of this container"
type: "integer"
example: 1234
ExitCode:
description: "The last exit code of this container"
type: "integer"
example: 0
Error:
type: "string"
StartedAt:
description: "The time when this container was last started."
type: "string"
example: "2020-01-06T09:06:59.461876391Z"
FinishedAt:
description: "The time when this container last exited."
type: "string"
example: "2020-01-06T09:07:59.461876391Z"
Health:
$ref: "#/definitions/Health"
ContainerCreateResponse:
description: "OK response to ContainerCreate operation"
type: "object"
title: "ContainerCreateResponse"
x-go-name: "CreateResponse"
required: [Id, Warnings]
properties:
Id:
description: "The ID of the created container"
type: "string"
x-nullable: false
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Warnings:
description: "Warnings encountered when creating the container"
type: "array"
x-nullable: false
items:
type: "string"
example: []
ContainerWaitResponse:
description: "OK response to ContainerWait operation"
type: "object"
x-go-name: "WaitResponse"
title: "ContainerWaitResponse"
required: [StatusCode, Error]
properties:
StatusCode:
description: "Exit code of the container"
type: "integer"
x-nullable: false
Error:
$ref: "#/definitions/ContainerWaitExitError"
ContainerWaitExitError:
description: "container waiting error, if any"
type: "object"
x-go-name: "WaitExitError"
properties:
Message:
description: "Details of an error"
type: "string"
SystemVersion:
type: "object"
description: |
Response of Engine API: GET "/version"
properties:
Platform:
type: "object"
required: [Name]
properties:
Name:
type: "string"
Components:
type: "array"
description: |
Information about system components
items:
type: "object"
x-go-name: ComponentVersion
required: [Name, Version]
properties:
Name:
description: |
Name of the component
type: "string"
example: "Engine"
Version:
description: |
Version of the component
type: "string"
x-nullable: false
example: "19.03.12"
Details:
description: |
Key/value pairs of strings with additional information about the
component. These values are intended for informational purposes
only, and their content is not defined, and not part of the API
specification.
These messages can be printed by the client as information to the user.
type: "object"
x-nullable: true
Version:
description: "The version of the daemon"
type: "string"
example: "19.03.12"
ApiVersion:
description: |
The default (and highest) API version that is supported by the daemon
type: "string"
example: "1.40"
MinAPIVersion:
description: |
The minimum API version that is supported by the daemon
type: "string"
example: "1.12"
GitCommit:
description: |
The Git commit of the source code that was used to build the daemon
type: "string"
example: "48a66213fe"
GoVersion:
description: |
The version Go used to compile the daemon, and the version of the Go
runtime in use.
type: "string"
example: "go1.13.14"
Os:
description: |
The operating system that the daemon is running on ("linux" or "windows")
type: "string"
example: "linux"
Arch:
description: |
The architecture that the daemon is running on
type: "string"
example: "amd64"
KernelVersion:
description: |
The kernel version (`uname -r`) that the daemon is running on.
This field is omitted when empty.
type: "string"
example: "4.19.76-linuxkit"
Experimental:
description: |
Indicates if the daemon is started with experimental features enabled.
This field is omitted when empty / false.
type: "boolean"
example: true
BuildTime:
description: |
The date and time that the daemon was compiled.
type: "string"
example: "2020-06-22T15:49:27.000000000+00:00"
SystemInfo:
type: "object"
properties:
ID:
description: |
Unique identifier of the daemon.
<p><br /></p>
> **Note**: The format of the ID itself is not part of the API, and
> should not be considered stable.
type: "string"
example: "7TRN:IPZB:QYBB:VPBQ:UMPP:KARE:6ZNR:XE6T:7EWV:PKF4:ZOJD:TPYS"
Containers:
description: "Total number of containers on the host."
type: "integer"
example: 14
ContainersRunning:
description: |
Number of containers with status `"running"`.
type: "integer"
example: 3
ContainersPaused:
description: |
Number of containers with status `"paused"`.
type: "integer"
example: 1
ContainersStopped:
description: |
Number of containers with status `"stopped"`.
type: "integer"
example: 10
Images:
description: |
Total number of images on the host.
Both _tagged_ and _untagged_ (dangling) images are counted.
type: "integer"
example: 508
Driver:
description: "Name of the storage driver in use."
type: "string"
example: "overlay2"
DriverStatus:
description: |
Information specific to the storage driver, provided as
"label" / "value" pairs.
This information is provided by the storage driver, and formatted
in a way consistent with the output of `docker info` on the command
line.
<p><br /></p>
> **Note**: The information returned in this field, including the
> formatting of values and labels, should not be considered stable,
> and may change without notice.
type: "array"
items:
type: "array"
items:
type: "string"
example:
- ["Backing Filesystem", "extfs"]
- ["Supports d_type", "true"]
- ["Native Overlay Diff", "true"]
DockerRootDir:
description: |
Root directory of persistent Docker state.
Defaults to `/var/lib/docker` on Linux, and `C:\ProgramData\docker`
on Windows.
type: "string"
example: "/var/lib/docker"
Plugins:
$ref: "#/definitions/PluginsInfo"
MemoryLimit:
description: "Indicates if the host has memory limit support enabled."
type: "boolean"
example: true
SwapLimit:
description: "Indicates if the host has memory swap limit support enabled."
type: "boolean"
example: true
KernelMemoryTCP:
description: |
Indicates if the host has kernel memory TCP limit support enabled. This
field is omitted if not supported.
Kernel memory TCP limits are not supported when using cgroups v2, which
does not support the corresponding `memory.kmem.tcp.limit_in_bytes` cgroup.
type: "boolean"
example: true
CpuCfsPeriod:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) period is supported by
the host.
type: "boolean"
example: true
CpuCfsQuota:
description: |
Indicates if CPU CFS(Completely Fair Scheduler) quota is supported by
the host.
type: "boolean"
example: true
CPUShares:
description: |
Indicates if CPU Shares limiting is supported by the host.
type: "boolean"
example: true
CPUSet:
description: |
Indicates if CPUsets (cpuset.cpus, cpuset.mems) are supported by the host.
See [cpuset(7)](https://www.kernel.org/doc/Documentation/cgroup-v1/cpusets.txt)
type: "boolean"
example: true
PidsLimit:
description: "Indicates if the host kernel has PID limit support enabled."
type: "boolean"
example: true
OomKillDisable:
description: "Indicates if OOM killer disable is supported on the host."
type: "boolean"
IPv4Forwarding:
description: "Indicates IPv4 forwarding is enabled."
type: "boolean"
example: true
BridgeNfIptables:
description: "Indicates if `bridge-nf-call-iptables` is available on the host."
type: "boolean"
example: true
BridgeNfIp6tables:
description: "Indicates if `bridge-nf-call-ip6tables` is available on the host."
type: "boolean"
example: true
Debug:
description: |
Indicates if the daemon is running in debug-mode / with debug-level
logging enabled.
type: "boolean"
example: true
NFd:
description: |
The total number of file Descriptors in use by the daemon process.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 64
NGoroutines:
description: |
The number of goroutines that currently exist.
This information is only returned if debug-mode is enabled.
type: "integer"
example: 174
SystemTime:
description: |
Current system-time in [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt)
format with nano-seconds.
type: "string"
example: "2017-08-08T20:28:29.06202363Z"
LoggingDriver:
description: |
The logging driver to use as a default for new containers.
type: "string"
CgroupDriver:
description: |
The driver to use for managing cgroups.
type: "string"
enum: ["cgroupfs", "systemd", "none"]
default: "cgroupfs"
example: "cgroupfs"
CgroupVersion:
description: |
The version of the cgroup.
type: "string"
enum: ["1", "2"]
default: "1"
example: "1"
NEventsListener:
description: "Number of event listeners subscribed."
type: "integer"
example: 30
KernelVersion:
description: |
Kernel version of the host.
On Linux, this information obtained from `uname`. On Windows this
information is queried from the <kbd>HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\</kbd>
registry value, for example _"10.0 14393 (14393.1198.amd64fre.rs1_release_sec.170427-1353)"_.
type: "string"
example: "4.9.38-moby"
OperatingSystem:
description: |
Name of the host's operating system, for example: "Ubuntu 16.04.2 LTS"
or "Windows Server 2016 Datacenter"
type: "string"
example: "Alpine Linux v3.5"
OSVersion:
description: |
Version of the host's operating system
<p><br /></p>
> **Note**: The information returned in this field, including its
> very existence, and the formatting of values, should not be considered
> stable, and may change without notice.
type: "string"
example: "16.04"
OSType:
description: |
Generic type of the operating system of the host, as returned by the
Go runtime (`GOOS`).
Currently returned values are "linux" and "windows". A full list of
possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "linux"
Architecture:
description: |
Hardware architecture of the host, as returned by the Go runtime
(`GOARCH`).
A full list of possible values can be found in the [Go documentation](https://golang.org/doc/install/source#environment).
type: "string"
example: "x86_64"
NCPU:
description: |
The number of logical CPUs usable by the daemon.
The number of available CPUs is checked by querying the operating
system when the daemon starts. Changes to operating system CPU
allocation after the daemon is started are not reflected.
type: "integer"
example: 4
MemTotal:
description: |
Total amount of physical memory available on the host, in bytes.
type: "integer"
format: "int64"
example: 2095882240
IndexServerAddress:
description: |
Address / URL of the index server that is used for image search,
and as a default for user authentication for Docker Hub and Docker Cloud.
default: "https://index.docker.io/v1/"
type: "string"
example: "https://index.docker.io/v1/"
RegistryConfig:
$ref: "#/definitions/RegistryServiceConfig"
GenericResources:
$ref: "#/definitions/GenericResources"
HttpProxy:
description: |
HTTP-proxy configured for the daemon. This value is obtained from the
[`HTTP_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "http://xxxxx:[email protected]:8080"
HttpsProxy:
description: |
HTTPS-proxy configured for the daemon. This value is obtained from the
[`HTTPS_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html) environment variable.
Credentials ([user info component](https://tools.ietf.org/html/rfc3986#section-3.2.1)) in the proxy URL
are masked in the API response.
Containers do not automatically inherit this configuration.
type: "string"
example: "https://xxxxx:[email protected]:4443"
NoProxy:
description: |
Comma-separated list of domain extensions for which no proxy should be
used. This value is obtained from the [`NO_PROXY`](https://www.gnu.org/software/wget/manual/html_node/Proxies.html)
environment variable.
Containers do not automatically inherit this configuration.
type: "string"
example: "*.local, 169.254/16"
Name:
description: "Hostname of the host."
type: "string"
example: "node5.corp.example.com"
Labels:
description: |
User-defined labels (key/value metadata) as set on the daemon.
<p><br /></p>
> **Note**: When part of a Swarm, nodes can both have _daemon_ labels,
> set through the daemon configuration, and _node_ labels, set from a
> manager node in the Swarm. Node labels are not included in this
> field. Node labels can be retrieved using the `/nodes/(id)` endpoint
> on a manager node in the Swarm.
type: "array"
items:
type: "string"
example: ["storage=ssd", "production"]
ExperimentalBuild:
description: |
Indicates if experimental features are enabled on the daemon.
type: "boolean"
example: true
ServerVersion:
description: |
Version string of the daemon.
> **Note**: the [standalone Swarm API](https://docs.docker.com/swarm/swarm-api/)
> returns the Swarm version instead of the daemon version, for example
> `swarm/1.2.8`.
type: "string"
example: "17.06.0-ce"
ClusterStore:
description: |
URL of the distributed storage backend.
The storage backend is used for multihost networking (to store
network and endpoint information) and by the node discovery mechanism.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "consul://consul.corp.example.com:8600/some/path"
ClusterAdvertise:
description: |
The network endpoint that the Engine advertises for the purpose of
node discovery. ClusterAdvertise is a `host:port` combination on which
the daemon is reachable by other hosts.
<p><br /></p>
> **Deprecated**: This field is only propagated when using standalone Swarm
> mode, and overlay networking using an external k/v store. Overlay
> networks with Swarm mode enabled use the built-in raft store, and
> this field will be empty.
type: "string"
example: "node5.corp.example.com:8000"
Runtimes:
description: |
List of [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtimes configured on the daemon. Keys hold the "name" used to
reference the runtime.
The Docker daemon relies on an OCI compliant runtime (invoked via the
`containerd` daemon) as its interface to the Linux kernel namespaces,
cgroups, and SELinux.
The default runtime is `runc`, and automatically configured. Additional
runtimes can be configured by the user and will be listed here.
type: "object"
additionalProperties:
$ref: "#/definitions/Runtime"
default:
runc:
path: "runc"
example:
runc:
path: "runc"
runc-master:
path: "/go/bin/runc"
custom:
path: "/usr/local/bin/my-oci-runtime"
runtimeArgs: ["--debug", "--systemd-cgroup=false"]
DefaultRuntime:
description: |
Name of the default OCI runtime that is used when starting containers.
The default can be overridden per-container at create time.
type: "string"
default: "runc"
example: "runc"
Swarm:
$ref: "#/definitions/SwarmInfo"
LiveRestoreEnabled:
description: |
Indicates if live restore is enabled.
If enabled, containers are kept running when the daemon is shutdown
or upon daemon start if running containers are detected.
type: "boolean"
default: false
example: false
Isolation:
description: |
Represents the isolation technology to use as a default for containers.
The supported values are platform-specific.
If no isolation value is specified on daemon start, on Windows client,
the default is `hyperv`, and on Windows server, the default is `process`.
This option is currently not used on other platforms.
default: "default"
type: "string"
enum:
- "default"
- "hyperv"
- "process"
InitBinary:
description: |
Name and, optional, path of the `docker-init` binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "docker-init"
ContainerdCommit:
$ref: "#/definitions/Commit"
RuncCommit:
$ref: "#/definitions/Commit"
InitCommit:
$ref: "#/definitions/Commit"
SecurityOptions:
description: |
List of security features that are enabled on the daemon, such as
apparmor, seccomp, SELinux, user-namespaces (userns), and rootless.
Additional configuration options for each security feature may
be present, and are included as a comma-separated list of key/value
pairs.
type: "array"
items:
type: "string"
example:
- "name=apparmor"
- "name=seccomp,profile=default"
- "name=selinux"
- "name=userns"
- "name=rootless"
ProductLicense:
description: |
Reports a summary of the product license on the daemon.
If a commercial license has been applied to the daemon, information
such as number of nodes, and expiration are included.
type: "string"
example: "Community Engine"
DefaultAddressPools:
description: |
List of custom default address pools for local networks, which can be
specified in the daemon.json file or dockerd option.
Example: a Base "10.10.0.0/16" with Size 24 will define the set of 256
10.10.[0-255].0/24 address pools.
type: "array"
items:
type: "object"
properties:
Base:
description: "The network address in CIDR format"
type: "string"
example: "10.10.0.0/16"
Size:
description: "The network pool size"
type: "integer"
example: "24"
Warnings:
description: |
List of warnings / informational messages about missing features, or
issues related to the daemon configuration.
These messages can be printed by the client as information to the user.
type: "array"
items:
type: "string"
example:
- "WARNING: No memory limit support"
- "WARNING: bridge-nf-call-iptables is disabled"
- "WARNING: bridge-nf-call-ip6tables is disabled"
# PluginsInfo is a temp struct holding Plugins name
# registered with docker daemon. It is used by Info struct
PluginsInfo:
description: |
Available plugins per type.
<p><br /></p>
> **Note**: Only unmanaged (V1) plugins are included in this list.
> V1 plugins are "lazily" loaded, and are not returned in this list
> if there is no resource using the plugin.
type: "object"
properties:
Volume:
description: "Names of available volume-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["local"]
Network:
description: "Names of available network-drivers, and network-driver plugins."
type: "array"
items:
type: "string"
example: ["bridge", "host", "ipvlan", "macvlan", "null", "overlay"]
Authorization:
description: "Names of available authorization plugins."
type: "array"
items:
type: "string"
example: ["img-authz-plugin", "hbm"]
Log:
description: "Names of available logging-drivers, and logging-driver plugins."
type: "array"
items:
type: "string"
example: ["awslogs", "fluentd", "gcplogs", "gelf", "journald", "json-file", "logentries", "splunk", "syslog"]
RegistryServiceConfig:
description: |
RegistryServiceConfig stores daemon registry services configuration.
type: "object"
x-nullable: true
properties:
AllowNondistributableArtifactsCIDRs:
description: |
List of IP ranges to which nondistributable artifacts can be pushed,
using the CIDR syntax [RFC 4632](https://tools.ietf.org/html/4632).
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior, and enables the daemon to
push nondistributable artifacts to all registries whose resolved IP
address is within the subnet described by the CIDR syntax.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
AllowNondistributableArtifactsHostnames:
description: |
List of registry hostnames to which nondistributable artifacts can be
pushed, using the format `<hostname>[:<port>]` or `<IP address>[:<port>]`.
Some images (for example, Windows base images) contain artifacts
whose distribution is restricted by license. When these images are
pushed to a registry, restricted artifacts are not included.
This configuration override this behavior for the specified
registries.
This option is useful when pushing images containing
nondistributable artifacts to a registry on an air-gapped network so
hosts on that network can pull the images without connecting to
another server.
> **Warning**: Nondistributable artifacts typically have restrictions
> on how and where they can be distributed and shared. Only use this
> feature to push artifacts to private registries and ensure that you
> are in compliance with any terms that cover redistributing
> nondistributable artifacts.
type: "array"
items:
type: "string"
example: ["registry.internal.corp.example.com:3000", "[2001:db8:a0b:12f0::1]:443"]
InsecureRegistryCIDRs:
description: |
List of IP ranges of insecure registries, using the CIDR syntax
([RFC 4632](https://tools.ietf.org/html/4632)). Insecure registries
accept un-encrypted (HTTP) and/or untrusted (HTTPS with certificates
from unknown CAs) communication.
By default, local registries (`127.0.0.0/8`) are configured as
insecure. All other registries are secure. Communicating with an
insecure registry is not possible if the daemon assumes that registry
is secure.
This configuration override this behavior, insecure communication with
registries whose resolved IP address is within the subnet described by
the CIDR syntax.
Registries can also be marked insecure by hostname. Those registries
are listed under `IndexConfigs` and have their `Secure` field set to
`false`.
> **Warning**: Using this option can be useful when running a local
> registry, but introduces security vulnerabilities. This option
> should therefore ONLY be used for testing purposes. For increased
> security, users should add their CA to their system's list of trusted
> CAs instead of enabling this option.
type: "array"
items:
type: "string"
example: ["::1/128", "127.0.0.0/8"]
IndexConfigs:
type: "object"
additionalProperties:
$ref: "#/definitions/IndexInfo"
example:
"127.0.0.1:5000":
"Name": "127.0.0.1:5000"
"Mirrors": []
"Secure": false
"Official": false
"[2001:db8:a0b:12f0::1]:80":
"Name": "[2001:db8:a0b:12f0::1]:80"
"Mirrors": []
"Secure": false
"Official": false
"docker.io":
Name: "docker.io"
Mirrors: ["https://hub-mirror.corp.example.com:5000/"]
Secure: true
Official: true
"registry.internal.corp.example.com:3000":
Name: "registry.internal.corp.example.com:3000"
Mirrors: []
Secure: false
Official: false
Mirrors:
description: |
List of registry URLs that act as a mirror for the official
(`docker.io`) registry.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://[2001:db8:a0b:12f0::1]/"
IndexInfo:
description:
IndexInfo contains information about a registry.
type: "object"
x-nullable: true
properties:
Name:
description: |
Name of the registry, such as "docker.io".
type: "string"
example: "docker.io"
Mirrors:
description: |
List of mirrors, expressed as URIs.
type: "array"
items:
type: "string"
example:
- "https://hub-mirror.corp.example.com:5000/"
- "https://registry-2.docker.io/"
- "https://registry-3.docker.io/"
Secure:
description: |
Indicates if the registry is part of the list of insecure
registries.
If `false`, the registry is insecure. Insecure registries accept
un-encrypted (HTTP) and/or untrusted (HTTPS with certificates from
unknown CAs) communication.
> **Warning**: Insecure registries can be useful when running a local
> registry. However, because its use creates security vulnerabilities
> it should ONLY be enabled for testing purposes. For increased
> security, users should add their CA to their system's list of
> trusted CAs instead of enabling this option.
type: "boolean"
example: true
Official:
description: |
Indicates whether this is an official registry (i.e., Docker Hub / docker.io)
type: "boolean"
example: true
Runtime:
description: |
Runtime describes an [OCI compliant](https://github.com/opencontainers/runtime-spec)
runtime.
The runtime is invoked by the daemon via the `containerd` daemon. OCI
runtimes act as an interface to the Linux kernel namespaces, cgroups,
and SELinux.
type: "object"
properties:
path:
description: |
Name and, optional, path, of the OCI executable binary.
If the path is omitted, the daemon searches the host's `$PATH` for the
binary and uses the first result.
type: "string"
example: "/usr/local/bin/my-oci-runtime"
runtimeArgs:
description: |
List of command-line arguments to pass to the runtime when invoked.
type: "array"
x-nullable: true
items:
type: "string"
example: ["--debug", "--systemd-cgroup=false"]
Commit:
description: |
Commit holds the Git-commit (SHA1) that a binary was built from, as
reported in the version-string of external tools, such as `containerd`,
or `runC`.
type: "object"
properties:
ID:
description: "Actual commit ID of external tool."
type: "string"
example: "cfb82a876ecc11b5ca0977d1733adbe58599088a"
Expected:
description: |
Commit ID of external tool expected by dockerd as set at build time.
type: "string"
example: "2d41c047c83e09a6d61d464906feb2a2f3c52aa4"
SwarmInfo:
description: |
Represents generic information about swarm.
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
default: ""
example: "k67qz4598weg5unwwffg6z1m1"
NodeAddr:
description: |
IP address at which this node can be reached by other nodes in the
swarm.
type: "string"
default: ""
example: "10.0.0.46"
LocalNodeState:
$ref: "#/definitions/LocalNodeState"
ControlAvailable:
type: "boolean"
default: false
example: true
Error:
type: "string"
default: ""
RemoteManagers:
description: |
List of ID's and addresses of other managers in the swarm.
type: "array"
default: null
x-nullable: true
items:
$ref: "#/definitions/PeerNode"
example:
- NodeID: "71izy0goik036k48jg985xnds"
Addr: "10.0.0.158:2377"
- NodeID: "79y6h1o4gv8n120drcprv5nmc"
Addr: "10.0.0.159:2377"
- NodeID: "k67qz4598weg5unwwffg6z1m1"
Addr: "10.0.0.46:2377"
Nodes:
description: "Total number of nodes in the swarm."
type: "integer"
x-nullable: true
example: 4
Managers:
description: "Total number of managers in the swarm."
type: "integer"
x-nullable: true
example: 3
Cluster:
$ref: "#/definitions/ClusterInfo"
LocalNodeState:
description: "Current local status of this node."
type: "string"
default: ""
enum:
- ""
- "inactive"
- "pending"
- "active"
- "error"
- "locked"
example: "active"
PeerNode:
description: "Represents a peer-node in the swarm"
type: "object"
properties:
NodeID:
description: "Unique identifier of for this node in the swarm."
type: "string"
Addr:
description: |
IP address and ports at which this node can be reached.
type: "string"
NetworkAttachmentConfig:
description: |
Specifies how a service should be attached to a particular network.
type: "object"
properties:
Target:
description: |
The target network for attachment. Must be a network name or ID.
type: "string"
Aliases:
description: |
Discoverable alternate names for the service on this network.
type: "array"
items:
type: "string"
DriverOpts:
description: |
Driver attachment options for the network target.
type: "object"
additionalProperties:
type: "string"
EventActor:
description: |
Actor describes something that generates events, like a container, network,
or a volume.
type: "object"
properties:
ID:
description: "The ID of the object emitting the event"
type: "string"
example: "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743"
Attributes:
description: |
Various key/value attributes of the object, depending on its type.
type: "object"
additionalProperties:
type: "string"
example:
com.example.some-label: "some-label-value"
image: "alpine:latest"
name: "my-container"
EventMessage:
description: |
EventMessage represents the information an event contains.
type: "object"
title: "SystemEventsResponse"
properties:
Type:
description: "The type of object emitting the event"
type: "string"
enum: ["builder", "config", "container", "daemon", "image", "network", "node", "plugin", "secret", "service", "volume"]
example: "container"
Action:
description: "The type of event"
type: "string"
example: "create"
Actor:
$ref: "#/definitions/EventActor"
scope:
description: |
Scope of the event. Engine events are `local` scope. Cluster (Swarm)
events are `swarm` scope.
type: "string"
enum: ["local", "swarm"]
time:
description: "Timestamp of event"
type: "integer"
format: "int64"
example: 1629574695
timeNano:
description: "Timestamp of event, with nanosecond accuracy"
type: "integer"
format: "int64"
example: 1629574695515050031
OCIDescriptor:
type: "object"
x-go-name: Descriptor
description: |
A descriptor struct containing digest, media type, and size, as defined in
the [OCI Content Descriptors Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/descriptor.md).
properties:
mediaType:
description: |
The media type of the object this schema refers to.
type: "string"
example: "application/vnd.docker.distribution.manifest.v2+json"
digest:
description: |
The digest of the targeted content.
type: "string"
example: "sha256:c0537ff6a5218ef531ece93d4984efc99bbf3f7497c0a7726c88e2bb7584dc96"
size:
description: |
The size in bytes of the blob.
type: "integer"
format: "int64"
example: 3987495
# TODO Not yet including these fields for now, as they are nil / omitted in our response.
# urls:
# description: |
# List of URLs from which this object MAY be downloaded.
# type: "array"
# items:
# type: "string"
# format: "uri"
# annotations:
# description: |
# Arbitrary metadata relating to the targeted content.
# type: "object"
# additionalProperties:
# type: "string"
# platform:
# $ref: "#/definitions/OCIPlatform"
OCIPlatform:
type: "object"
x-go-name: Platform
description: |
Describes the platform which the image in the manifest runs on, as defined
in the [OCI Image Index Specification](https://github.com/opencontainers/image-spec/blob/v1.0.1/image-index.md).
properties:
architecture:
description: |
The CPU architecture, for example `amd64` or `ppc64`.
type: "string"
example: "arm"
os:
description: |
The operating system, for example `linux` or `windows`.
type: "string"
example: "windows"
os.version:
description: |
Optional field specifying the operating system version, for example on
Windows `10.0.19041.1165`.
type: "string"
example: "10.0.19041.1165"
os.features:
description: |
Optional field specifying an array of strings, each listing a required
OS feature (for example on Windows `win32k`).
type: "array"
items:
type: "string"
example:
- "win32k"
variant:
description: |
Optional field specifying a variant of the CPU, for example `v7` to
specify ARMv7 when architecture is `arm`.
type: "string"
example: "v7"
DistributionInspect:
type: "object"
x-go-name: DistributionInspect
title: "DistributionInspectResponse"
required: [Descriptor, Platforms]
description: |
Describes the result obtained from contacting the registry to retrieve
image metadata.
properties:
Descriptor:
$ref: "#/definitions/OCIDescriptor"
Platforms:
type: "array"
description: |
An array containing all platforms supported by the image.
items:
$ref: "#/definitions/OCIPlatform"
ClusterVolume:
type: "object"
description: |
Options and information specific to, and only present on, Swarm CSI
cluster volumes.
properties:
ID:
type: "string"
description: |
The Swarm ID of this volume. Because cluster volumes are Swarm
objects, they have an ID, unlike non-cluster volumes. This ID can
be used to refer to the Volume instead of the name.
Version:
$ref: "#/definitions/ObjectVersion"
CreatedAt:
type: "string"
format: "dateTime"
UpdatedAt:
type: "string"
format: "dateTime"
Spec:
$ref: "#/definitions/ClusterVolumeSpec"
Info:
type: "object"
description: |
Information about the global status of the volume.
properties:
CapacityBytes:
type: "integer"
format: "int64"
description: |
The capacity of the volume in bytes. A value of 0 indicates that
the capacity is unknown.
VolumeContext:
type: "object"
description: |
A map of strings to strings returned from the storage plugin when
the volume is created.
additionalProperties:
type: "string"
VolumeID:
type: "string"
description: |
The ID of the volume as returned by the CSI storage plugin. This
is distinct from the volume's ID as provided by Docker. This ID
is never used by the user when communicating with Docker to refer
to this volume. If the ID is blank, then the Volume has not been
successfully created in the plugin yet.
AccessibleTopology:
type: "array"
description: |
The topology this volume is actually accessible from.
items:
$ref: "#/definitions/Topology"
PublishStatus:
type: "array"
description: |
The status of the volume as it pertains to its publishing and use on
specific nodes
items:
type: "object"
properties:
NodeID:
type: "string"
description: |
The ID of the Swarm node the volume is published on.
State:
type: "string"
description: |
The published state of the volume.
* `pending-publish` The volume should be published to this node, but the call to the controller plugin to do so has not yet been successfully completed.
* `published` The volume is published successfully to the node.
* `pending-node-unpublish` The volume should be unpublished from the node, and the manager is awaiting confirmation from the worker that it has done so.
* `pending-controller-unpublish` The volume is successfully unpublished from the node, but has not yet been successfully unpublished on the controller.
enum:
- "pending-publish"
- "published"
- "pending-node-unpublish"
- "pending-controller-unpublish"
PublishContext:
type: "object"
description: |
A map of strings to strings returned by the CSI controller
plugin when a volume is published.
additionalProperties:
type: "string"
ClusterVolumeSpec:
type: "object"
description: |
Cluster-specific options used to create the volume.
properties:
Group:
type: "string"
description: |
Group defines the volume group of this volume. Volumes belonging to
the same group can be referred to by group name when creating
Services. Referring to a volume by group instructs Swarm to treat
volumes in that group interchangeably for the purpose of scheduling.
Volumes with an empty string for a group technically all belong to
the same, emptystring group.
AccessMode:
type: "object"
description: |
Defines how the volume is used by tasks.
properties:
Scope:
type: "string"
description: |
The set of nodes this volume can be used on at one time.
- `single` The volume may only be scheduled to one node at a time.
- `multi` the volume may be scheduled to any supported number of nodes at a time.
default: "single"
enum: ["single", "multi"]
x-nullable: false
Sharing:
type: "string"
description: |
The number and way that different tasks can use this volume
at one time.
- `none` The volume may only be used by one task at a time.
- `readonly` The volume may be used by any number of tasks, but they all must mount the volume as readonly
- `onewriter` The volume may be used by any number of tasks, but only one may mount it as read/write.
- `all` The volume may have any number of readers and writers.
default: "none"
enum: ["none", "readonly", "onewriter", "all"]
x-nullable: false
MountVolume:
type: "object"
description: |
Options for using this volume as a Mount-type volume.
Either MountVolume or BlockVolume, but not both, must be
present.
properties:
FsType:
type: "string"
description: |
Specifies the filesystem type for the mount volume.
Optional.
MountFlags:
type: "array"
description: |
Flags to pass when mounting the volume. Optional.
items:
type: "string"
BlockVolume:
type: "object"
description: |
Options for using this volume as a Block-type volume.
Intentionally empty.
Secrets:
type: "array"
description: |
Swarm Secrets that are passed to the CSI storage plugin when
operating on this volume.
items:
type: "object"
description: |
One cluster volume secret entry. Defines a key-value pair that
is passed to the plugin.
properties:
Key:
type: "string"
description: |
Key is the name of the key of the key-value pair passed to
the plugin.
Secret:
type: "string"
description: |
Secret is the swarm Secret object from which to read data.
This can be a Secret name or ID. The Secret data is
retrieved by swarm and used as the value of the key-value
pair passed to the plugin.
AccessibilityRequirements:
type: "object"
description: |
Requirements for the accessible topology of the volume. These
fields are optional. For an in-depth description of what these
fields mean, see the CSI specification.
properties:
Requisite:
type: "array"
description: |
A list of required topologies, at least one of which the
volume must be accessible from.
items:
$ref: "#/definitions/Topology"
Preferred:
type: "array"
description: |
A list of topologies that the volume should attempt to be
provisioned in.
items:
$ref: "#/definitions/Topology"
CapacityRange:
type: "object"
description: |
The desired capacity that the volume should be created with. If
empty, the plugin will decide the capacity.
properties:
RequiredBytes:
type: "integer"
format: "int64"
description: |
The volume must be at least this big. The value of 0
indicates an unspecified minimum
LimitBytes:
type: "integer"
format: "int64"
description: |
The volume must not be bigger than this. The value of 0
indicates an unspecified maximum.
Availability:
type: "string"
description: |
The availability of the volume for use in tasks.
- `active` The volume is fully available for scheduling on the cluster
- `pause` No new workloads should use the volume, but existing workloads are not stopped.
- `drain` All workloads using this volume should be stopped and rescheduled, and no new ones should be started.
default: "active"
x-nullable: false
enum:
- "active"
- "pause"
- "drain"
Topology:
description: |
A map of topological domains to topological segments. For in depth
details, see documentation for the Topology object in the CSI
specification.
type: "object"
additionalProperties:
type: "string"
paths:
/containers/json:
get:
summary: "List containers"
description: |
Returns a list of containers. For details on the format, see the
[inspect endpoint](#operation/ContainerInspect).
Note that it uses a different, smaller representation of a container
than inspecting a single container. For example, the list of linked
containers is not propagated .
operationId: "ContainerList"
produces:
- "application/json"
parameters:
- name: "all"
in: "query"
description: |
Return all containers. By default, only running containers are shown.
type: "boolean"
default: false
- name: "limit"
in: "query"
description: |
Return this number of most recently created containers, including
non-running ones.
type: "integer"
- name: "size"
in: "query"
description: |
Return the size of container as fields `SizeRw` and `SizeRootFs`.
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
Filters to process on the container list, encoded as JSON (a
`map[string][]string`). For example, `{"status": ["paused"]}` will
only return paused containers.
Available filters:
- `ancestor`=(`<image-name>[:<tag>]`, `<image id>`, or `<image@digest>`)
- `before`=(`<container id>` or `<container name>`)
- `expose`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `exited=<int>` containers with exit code of `<int>`
- `health`=(`starting`|`healthy`|`unhealthy`|`none`)
- `id=<ID>` a container's ID
- `isolation=`(`default`|`process`|`hyperv`) (Windows daemon only)
- `is-task=`(`true`|`false`)
- `label=key` or `label="key=value"` of a container label
- `name=<name>` a container's name
- `network`=(`<network id>` or `<network name>`)
- `publish`=(`<port>[/<proto>]`|`<startport-endport>/[<proto>]`)
- `since`=(`<container id>` or `<container name>`)
- `status=`(`created`|`restarting`|`running`|`removing`|`paused`|`exited`|`dead`)
- `volume`=(`<volume name>` or `<mount point destination>`)
type: "string"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
examples:
application/json:
- Id: "8dfafdbc3a40"
Names:
- "/boring_feynman"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 1"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports:
- PrivatePort: 2222
PublicPort: 3333
Type: "tcp"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "2cdc4edb1ded3631c81f57966563e5c8525b81121bb3706a9a9a3ae102711f3f"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:02"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
- Id: "9cd87474be90"
Names:
- "/coolName"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 222222"
Created: 1367854155
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "88eaed7b37b38c2a3f0c4bc796494fdf51b270c2d22656412a2ca5d559a64d7a"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.8"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:08"
Mounts: []
- Id: "3176a2479c92"
Names:
- "/sleepy_dog"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 3333333333333333"
Created: 1367854154
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "8b27c041c30326d59cd6e6f510d4f8d1d570a228466f956edf7815508f78e30d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.6"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:06"
Mounts: []
- Id: "4cb07b47f9fb"
Names:
- "/running_cat"
Image: "ubuntu:latest"
ImageID: "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82"
Command: "echo 444444444444444444444444444444444"
Created: 1367854152
State: "Exited"
Status: "Exit 0"
Ports: []
Labels: {}
SizeRw: 12288
SizeRootFs: 0
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "d91c7b2f0644403d7ef3095985ea0e2370325cd2332ff3a3225c4247328e66e9"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.5"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:11:00:05"
Mounts: []
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/create:
post:
summary: "Create a container"
operationId: "ContainerCreate"
consumes:
- "application/json"
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "name"
in: "query"
description: |
Assign the specified name to the container. Must match
`/?[a-zA-Z0-9][a-zA-Z0-9_.-]+`.
type: "string"
pattern: "^/?[a-zA-Z0-9][a-zA-Z0-9_.-]+$"
- name: "body"
in: "body"
description: "Container to create"
schema:
allOf:
- $ref: "#/definitions/ContainerConfig"
- type: "object"
properties:
HostConfig:
$ref: "#/definitions/HostConfig"
NetworkingConfig:
$ref: "#/definitions/NetworkingConfig"
example:
Hostname: ""
Domainname: ""
User: ""
AttachStdin: false
AttachStdout: true
AttachStderr: true
Tty: false
OpenStdin: false
StdinOnce: false
Env:
- "FOO=bar"
- "BAZ=quux"
Cmd:
- "date"
Entrypoint: ""
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
Volumes:
/volumes/data: {}
WorkingDir: ""
NetworkDisabled: false
MacAddress: "12:34:56:78:9a:bc"
ExposedPorts:
22/tcp: {}
StopSignal: "SIGTERM"
StopTimeout: 10
HostConfig:
Binds:
- "/tmp:/tmp"
Links:
- "redis3:redis"
Memory: 0
MemorySwap: 0
MemoryReservation: 0
NanoCpus: 500000
CpuPercent: 80
CpuShares: 512
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpuQuota: 50000
CpusetCpus: "0,1"
CpusetMems: "0,1"
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 300
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceWriteIOps:
- {}
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
MemorySwappiness: 60
OomKillDisable: false
OomScoreAdj: 500
PidMode: ""
PidsLimit: 0
PortBindings:
22/tcp:
- HostPort: "11022"
PublishAllPorts: false
Privileged: false
ReadonlyRootfs: false
Dns:
- "8.8.8.8"
DnsOptions:
- ""
DnsSearch:
- ""
VolumesFrom:
- "parent"
- "other:ro"
CapAdd:
- "NET_ADMIN"
CapDrop:
- "MKNOD"
GroupAdd:
- "newgroup"
RestartPolicy:
Name: ""
MaximumRetryCount: 0
AutoRemove: true
NetworkMode: "bridge"
Devices: []
Ulimits:
- {}
LogConfig:
Type: "json-file"
Config: {}
SecurityOpt: []
StorageOpt: {}
CgroupParent: ""
VolumeDriver: ""
ShmSize: 67108864
NetworkingConfig:
EndpointsConfig:
isolated_nw:
IPAMConfig:
IPv4Address: "172.20.30.33"
IPv6Address: "2001:db8:abcd::3033"
LinkLocalIPs:
- "169.254.34.68"
- "fe80::3468"
Links:
- "container_1"
- "container_2"
Aliases:
- "server_x"
- "server_y"
required: true
responses:
201:
description: "Container created successfully"
schema:
$ref: "#/definitions/ContainerCreateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/containers/{id}/json:
get:
summary: "Inspect a container"
description: "Return low-level information about a container."
operationId: "ContainerInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerInspectResponse"
properties:
Id:
description: "The ID of the container"
type: "string"
Created:
description: "The time the container was created"
type: "string"
Path:
description: "The path to the command being run"
type: "string"
Args:
description: "The arguments to the command being run"
type: "array"
items:
type: "string"
State:
$ref: "#/definitions/ContainerState"
Image:
description: "The container's image ID"
type: "string"
ResolvConfPath:
type: "string"
HostnamePath:
type: "string"
HostsPath:
type: "string"
LogPath:
type: "string"
Name:
type: "string"
RestartCount:
type: "integer"
Driver:
type: "string"
Platform:
type: "string"
MountLabel:
type: "string"
ProcessLabel:
type: "string"
AppArmorProfile:
type: "string"
ExecIDs:
description: "IDs of exec instances that are running in the container."
type: "array"
items:
type: "string"
x-nullable: true
HostConfig:
$ref: "#/definitions/HostConfig"
GraphDriver:
$ref: "#/definitions/GraphDriverData"
SizeRw:
description: |
The size of files that have been created or changed by this
container.
type: "integer"
format: "int64"
SizeRootFs:
description: "The total size of all the files in this container."
type: "integer"
format: "int64"
Mounts:
type: "array"
items:
$ref: "#/definitions/MountPoint"
Config:
$ref: "#/definitions/ContainerConfig"
NetworkSettings:
$ref: "#/definitions/NetworkSettings"
examples:
application/json:
AppArmorProfile: ""
Args:
- "-c"
- "exit 9"
Config:
AttachStderr: true
AttachStdin: false
AttachStdout: true
Cmd:
- "/bin/sh"
- "-c"
- "exit 9"
Domainname: ""
Env:
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Healthcheck:
Test: ["CMD-SHELL", "exit 0"]
Hostname: "ba033ac44011"
Image: "ubuntu"
Labels:
com.example.vendor: "Acme"
com.example.license: "GPL"
com.example.version: "1.0"
MacAddress: ""
NetworkDisabled: false
OpenStdin: false
StdinOnce: false
Tty: false
User: ""
Volumes:
/volumes/data: {}
WorkingDir: ""
StopSignal: "SIGTERM"
StopTimeout: 10
Created: "2015-01-06T15:47:31.485331387Z"
Driver: "devicemapper"
ExecIDs:
- "b35395de42bc8abd327f9dd65d913b9ba28c74d2f0734eeeae84fa1c616a0fca"
- "3fc1232e5cd20c8de182ed81178503dc6437f4e7ef12b52cc5e8de020652f1c4"
HostConfig:
MaximumIOps: 0
MaximumIOBps: 0
BlkioWeight: 0
BlkioWeightDevice:
- {}
BlkioDeviceReadBps:
- {}
BlkioDeviceWriteBps:
- {}
BlkioDeviceReadIOps:
- {}
BlkioDeviceWriteIOps:
- {}
ContainerIDFile: ""
CpusetCpus: ""
CpusetMems: ""
CpuPercent: 80
CpuShares: 0
CpuPeriod: 100000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
Devices: []
DeviceRequests:
- Driver: "nvidia"
Count: -1
DeviceIDs": ["0", "1", "GPU-fef8089b-4820-abfc-e83e-94318197576e"]
Capabilities: [["gpu", "nvidia", "compute"]]
Options:
property1: "string"
property2: "string"
IpcMode: ""
Memory: 0
MemorySwap: 0
MemoryReservation: 0
OomKillDisable: false
OomScoreAdj: 500
NetworkMode: "bridge"
PidMode: ""
PortBindings: {}
Privileged: false
ReadonlyRootfs: false
PublishAllPorts: false
RestartPolicy:
MaximumRetryCount: 2
Name: "on-failure"
LogConfig:
Type: "json-file"
Sysctls:
net.ipv4.ip_forward: "1"
Ulimits:
- {}
VolumeDriver: ""
ShmSize: 67108864
HostnamePath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hostname"
HostsPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hosts"
LogPath: "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b-json.log"
Id: "ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39"
Image: "04c5d3b7b0656168630d3ba35d8889bd0e9caafcaeb3004d2bfbc47e7c5d35d2"
MountLabel: ""
Name: "/boring_euclid"
NetworkSettings:
Bridge: ""
SandboxID: ""
HairpinMode: false
LinkLocalIPv6Address: ""
LinkLocalIPv6PrefixLen: 0
SandboxKey: ""
EndpointID: ""
Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
IPAddress: ""
IPPrefixLen: 0
IPv6Gateway: ""
MacAddress: ""
Networks:
bridge:
NetworkID: "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812"
EndpointID: "7587b82f0dada3656fda26588aee72630c6fab1536d36e394b2bfbcf898c971d"
Gateway: "172.17.0.1"
IPAddress: "172.17.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Path: "/bin/sh"
ProcessLabel: ""
ResolvConfPath: "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/resolv.conf"
RestartCount: 1
State:
Error: ""
ExitCode: 9
FinishedAt: "2015-01-06T15:47:32.080254511Z"
Health:
Status: "healthy"
FailingStreak: 0
Log:
- Start: "2019-12-22T10:59:05.6385933Z"
End: "2019-12-22T10:59:05.8078452Z"
ExitCode: 0
Output: ""
OOMKilled: false
Dead: false
Paused: false
Pid: 0
Restarting: false
Running: true
StartedAt: "2015-01-06T15:47:32.072697474Z"
Status: "running"
Mounts:
- Name: "fac362...80535"
Source: "/data"
Destination: "/data"
Driver: "local"
Mode: "ro,Z"
RW: false
Propagation: ""
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "size"
in: "query"
type: "boolean"
default: false
description: "Return the size of container as fields `SizeRw` and `SizeRootFs`"
tags: ["Container"]
/containers/{id}/top:
get:
summary: "List processes running inside a container"
description: |
On Unix systems, this is done by running the `ps` command. This endpoint
is not supported on Windows.
operationId: "ContainerTop"
responses:
200:
description: "no error"
schema:
type: "object"
title: "ContainerTopResponse"
description: "OK response to ContainerTop operation"
properties:
Titles:
description: "The ps column titles"
type: "array"
items:
type: "string"
Processes:
description: |
Each process running in the container, where each is process
is an array of values corresponding to the titles.
type: "array"
items:
type: "array"
items:
type: "string"
examples:
application/json:
Titles:
- "UID"
- "PID"
- "PPID"
- "C"
- "STIME"
- "TTY"
- "TIME"
- "CMD"
Processes:
-
- "root"
- "13642"
- "882"
- "0"
- "17:03"
- "pts/0"
- "00:00:00"
- "/bin/bash"
-
- "root"
- "13735"
- "13642"
- "0"
- "17:06"
- "pts/0"
- "00:00:00"
- "sleep 10"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "ps_args"
in: "query"
description: "The arguments to pass to `ps`. For example, `aux`"
type: "string"
default: "-ef"
tags: ["Container"]
/containers/{id}/logs:
get:
summary: "Get container logs"
description: |
Get `stdout` and `stderr` logs from a container.
Note: This endpoint works only for containers with the `json-file` or
`journald` logging driver.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ContainerLogs"
responses:
200:
description: |
logs returned as a stream in response body.
For the stream format, [see the documentation for the attach endpoint](#operation/ContainerAttach).
Note that unlike the attach endpoint, the logs endpoint does not
upgrade the connection and does not set Content-Type.
schema:
type: "string"
format: "binary"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "until"
in: "query"
description: "Only return logs before this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Container"]
/containers/{id}/changes:
get:
summary: "Get changes on a container’s filesystem"
description: |
Returns which files in a container's filesystem have been added, deleted,
or modified. The `Kind` of modification can be one of:
- `0`: Modified
- `1`: Added
- `2`: Deleted
operationId: "ContainerChanges"
produces: ["application/json"]
responses:
200:
description: "The list of changes"
schema:
type: "array"
items:
type: "object"
x-go-name: "ContainerChangeResponseItem"
title: "ContainerChangeResponseItem"
description: "change item in response to ContainerChanges operation"
required: [Path, Kind]
properties:
Path:
description: "Path to file that has changed"
type: "string"
x-nullable: false
Kind:
description: "Kind of change"
type: "integer"
format: "uint8"
enum: [0, 1, 2]
x-nullable: false
examples:
application/json:
- Path: "/dev"
Kind: 0
- Path: "/dev/kmsg"
Kind: 1
- Path: "/test"
Kind: 1
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/export:
get:
summary: "Export a container"
description: "Export the contents of a container as a tarball."
operationId: "ContainerExport"
produces:
- "application/octet-stream"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/stats:
get:
summary: "Get container stats based on resource usage"
description: |
This endpoint returns a live stream of a container’s resource usage
statistics.
The `precpu_stats` is the CPU statistic of the *previous* read, and is
used to calculate the CPU usage percentage. It is not an exact copy
of the `cpu_stats` field.
If either `precpu_stats.online_cpus` or `cpu_stats.online_cpus` is
nil then for compatibility with older daemons the length of the
corresponding `cpu_usage.percpu_usage` array should be used.
On a cgroup v2 host, the following fields are not set
* `blkio_stats`: all fields other than `io_service_bytes_recursive`
* `cpu_stats`: `cpu_usage.percpu_usage`
* `memory_stats`: `max_usage` and `failcnt`
Also, `memory_stats.stats` fields are incompatible with cgroup v1.
To calculate the values shown by the `stats` command of the docker cli tool
the following formulas can be used:
* used_memory = `memory_stats.usage - memory_stats.stats.cache`
* available_memory = `memory_stats.limit`
* Memory usage % = `(used_memory / available_memory) * 100.0`
* cpu_delta = `cpu_stats.cpu_usage.total_usage - precpu_stats.cpu_usage.total_usage`
* system_cpu_delta = `cpu_stats.system_cpu_usage - precpu_stats.system_cpu_usage`
* number_cpus = `lenght(cpu_stats.cpu_usage.percpu_usage)` or `cpu_stats.online_cpus`
* CPU usage % = `(cpu_delta / system_cpu_delta) * number_cpus * 100.0`
operationId: "ContainerStats"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
type: "object"
examples:
application/json:
read: "2015-01-08T22:57:31.547920715Z"
pids_stats:
current: 3
networks:
eth0:
rx_bytes: 5338
rx_dropped: 0
rx_errors: 0
rx_packets: 36
tx_bytes: 648
tx_dropped: 0
tx_errors: 0
tx_packets: 8
eth5:
rx_bytes: 4641
rx_dropped: 0
rx_errors: 0
rx_packets: 26
tx_bytes: 690
tx_dropped: 0
tx_errors: 0
tx_packets: 9
memory_stats:
stats:
total_pgmajfault: 0
cache: 0
mapped_file: 0
total_inactive_file: 0
pgpgout: 414
rss: 6537216
total_mapped_file: 0
writeback: 0
unevictable: 0
pgpgin: 477
total_unevictable: 0
pgmajfault: 0
total_rss: 6537216
total_rss_huge: 6291456
total_writeback: 0
total_inactive_anon: 0
rss_huge: 6291456
hierarchical_memory_limit: 67108864
total_pgfault: 964
total_active_file: 0
active_anon: 6537216
total_active_anon: 6537216
total_pgpgout: 414
total_cache: 0
inactive_anon: 0
active_file: 0
pgfault: 964
inactive_file: 0
total_pgpgin: 477
max_usage: 6651904
usage: 6537216
failcnt: 0
limit: 67108864
blkio_stats: {}
cpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24472255
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100215355
usage_in_kernelmode: 30000000
system_cpu_usage: 739306590000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
precpu_stats:
cpu_usage:
percpu_usage:
- 8646879
- 24350896
- 36438778
- 30657443
usage_in_usermode: 50000000
total_usage: 100093996
usage_in_kernelmode: 30000000
system_cpu_usage: 9492140000000
online_cpus: 4
throttling_data:
periods: 0
throttled_periods: 0
throttled_time: 0
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "stream"
in: "query"
description: |
Stream the output. If false, the stats will be output once and then
it will disconnect.
type: "boolean"
default: true
- name: "one-shot"
in: "query"
description: |
Only get a single stat instead of waiting for 2 cycles. Must be used
with `stream=false`.
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/resize:
post:
summary: "Resize a container TTY"
description: "Resize the TTY for a container."
operationId: "ContainerResize"
consumes:
- "application/octet-stream"
produces:
- "text/plain"
responses:
200:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "cannot resize container"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Container"]
/containers/{id}/start:
post:
summary: "Start a container"
operationId: "ContainerStart"
responses:
204:
description: "no error"
304:
description: "container already started"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container. Format is a
single character `[a-Z]` or `ctrl-<value>` where `<value>` is one
of: `a-z`, `@`, `^`, `[`, `,` or `_`.
type: "string"
tags: ["Container"]
/containers/{id}/stop:
post:
summary: "Stop a container"
operationId: "ContainerStop"
responses:
204:
description: "no error"
304:
description: "container already stopped"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/restart:
post:
summary: "Restart a container"
operationId: "ContainerRestart"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
- name: "t"
in: "query"
description: "Number of seconds to wait before killing the container"
type: "integer"
tags: ["Container"]
/containers/{id}/kill:
post:
summary: "Kill a container"
description: |
Send a POSIX signal to a container, defaulting to killing to the
container.
operationId: "ContainerKill"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is not running"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "Container d37cde0fe4ad63c3a7252023b2f9800282894247d145cb5933ddf6e52cc03a28 is not running"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "signal"
in: "query"
description: |
Signal to send to the container as an integer or string (e.g. `SIGINT`).
type: "string"
default: "SIGKILL"
tags: ["Container"]
/containers/{id}/update:
post:
summary: "Update a container"
description: |
Change various configuration options of a container without having to
recreate it.
operationId: "ContainerUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "The container has been updated."
schema:
type: "object"
title: "ContainerUpdateResponse"
description: "OK response to ContainerUpdate operation"
properties:
Warnings:
type: "array"
items:
type: "string"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "update"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/Resources"
- type: "object"
properties:
RestartPolicy:
$ref: "#/definitions/RestartPolicy"
example:
BlkioWeight: 300
CpuShares: 512
CpuPeriod: 100000
CpuQuota: 50000
CpuRealtimePeriod: 1000000
CpuRealtimeRuntime: 10000
CpusetCpus: "0,1"
CpusetMems: "0"
Memory: 314572800
MemorySwap: 514288000
MemoryReservation: 209715200
RestartPolicy:
MaximumRetryCount: 4
Name: "on-failure"
tags: ["Container"]
/containers/{id}/rename:
post:
summary: "Rename a container"
operationId: "ContainerRename"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "name already in use"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "name"
in: "query"
required: true
description: "New name for the container"
type: "string"
tags: ["Container"]
/containers/{id}/pause:
post:
summary: "Pause a container"
description: |
Use the freezer cgroup to suspend all processes in a container.
Traditionally, when suspending a process the `SIGSTOP` signal is used,
which is observable by the process being suspended. With the freezer
cgroup the process is unaware, and unable to capture, that it is being
suspended, and subsequently resumed.
operationId: "ContainerPause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/unpause:
post:
summary: "Unpause a container"
description: "Resume a container which has been paused."
operationId: "ContainerUnpause"
responses:
204:
description: "no error"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
tags: ["Container"]
/containers/{id}/attach:
post:
summary: "Attach to a container"
description: |
Attach to a container to read its output or send it input. You can attach
to the same container multiple times and you can reattach to containers
that have been detached.
Either the `stream` or `logs` parameter must be `true` for this endpoint
to do anything.
See the [documentation for the `docker attach` command](https://docs.docker.com/engine/reference/commandline/attach/)
for more details.
### Hijacking
This endpoint hijacks the HTTP connection to transport `stdin`, `stdout`,
and `stderr` on the same socket.
This is the response from the daemon for an attach request:
```
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
[STREAM]
```
After the headers and two new lines, the TCP connection can now be used
for raw, bidirectional communication between the client and server.
To hint potential proxies about connection hijacking, the Docker client
can also optionally send connection upgrade headers.
For example, the client sends this request to upgrade the connection:
```
POST /containers/16253994b7c4/attach?stream=1&stdout=1 HTTP/1.1
Upgrade: tcp
Connection: Upgrade
```
The Docker daemon will respond with a `101 UPGRADED` response, and will
similarly follow with the raw stream:
```
HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp
[STREAM]
```
### Stream format
When the TTY setting is disabled in [`POST /containers/create`](#operation/ContainerCreate),
the HTTP Content-Type header is set to application/vnd.docker.multiplexed-stream
and the stream over the hijacked connected is multiplexed to separate out
`stdout` and `stderr`. The stream consists of a series of frames, each
containing a header and a payload.
The header contains the information which the stream writes (`stdout` or
`stderr`). It also contains the size of the associated frame encoded in
the last four bytes (`uint32`).
It is encoded on the first eight bytes like this:
```go
header := [8]byte{STREAM_TYPE, 0, 0, 0, SIZE1, SIZE2, SIZE3, SIZE4}
```
`STREAM_TYPE` can be:
- 0: `stdin` (is written on `stdout`)
- 1: `stdout`
- 2: `stderr`
`SIZE1, SIZE2, SIZE3, SIZE4` are the four bytes of the `uint32` size
encoded as big endian.
Following the header is the payload, which is the specified number of
bytes of `STREAM_TYPE`.
The simplest way to implement this protocol is the following:
1. Read 8 bytes.
2. Choose `stdout` or `stderr` depending on the first byte.
3. Extract the frame size from the last four bytes.
4. Read the extracted size and output it on the correct output.
5. Goto 1.
### Stream format when using a TTY
When the TTY setting is enabled in [`POST /containers/create`](#operation/ContainerCreate),
the stream is not multiplexed. The data exchanged over the hijacked
connection is simply the raw data from the process PTY and client's
`stdin`.
operationId: "ContainerAttach"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,` or `_`.
type: "string"
- name: "logs"
in: "query"
description: |
Replay previous logs from the container.
This is useful for attaching to a container that has started and you
want to output everything since the container started.
If `stream` is also enabled, once all the previous output has been
returned, it will seamlessly transition into streaming current
output.
type: "boolean"
default: false
- name: "stream"
in: "query"
description: |
Stream attached streams from the time the request was made onwards.
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/attach/ws:
get:
summary: "Attach to a container via a websocket"
operationId: "ContainerAttachWebsocket"
responses:
101:
description: "no error, hints proxy about hijacking"
200:
description: "no error, no upgrade header found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "detachKeys"
in: "query"
description: |
Override the key sequence for detaching a container.Format is a single
character `[a-Z]` or `ctrl-<value>` where `<value>` is one of: `a-z`,
`@`, `^`, `[`, `,`, or `_`.
type: "string"
- name: "logs"
in: "query"
description: "Return logs"
type: "boolean"
default: false
- name: "stream"
in: "query"
description: "Return stream"
type: "boolean"
default: false
- name: "stdin"
in: "query"
description: "Attach to `stdin`"
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Attach to `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Attach to `stderr`"
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/wait:
post:
summary: "Wait for a container"
description: "Block until a container stops, then returns the exit code."
operationId: "ContainerWait"
produces: ["application/json"]
responses:
200:
description: "The container has exit."
schema:
$ref: "#/definitions/ContainerWaitResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "condition"
in: "query"
description: |
Wait until a container state reaches the given condition.
Defaults to `not-running` if omitted or empty.
type: "string"
enum:
- "not-running"
- "next-exit"
- "removed"
default: "not-running"
tags: ["Container"]
/containers/{id}:
delete:
summary: "Remove a container"
operationId: "ContainerDelete"
responses:
204:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "conflict"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: |
You cannot remove a running container: c2ada9df5af8. Stop the
container before attempting removal or force remove
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "v"
in: "query"
description: "Remove anonymous volumes associated with the container."
type: "boolean"
default: false
- name: "force"
in: "query"
description: "If the container is running, kill it before removing it."
type: "boolean"
default: false
- name: "link"
in: "query"
description: "Remove the specified link associated with the container."
type: "boolean"
default: false
tags: ["Container"]
/containers/{id}/archive:
head:
summary: "Get information about files in a container"
description: |
A response header `X-Docker-Container-Path-Stat` is returned, containing
a base64 - encoded JSON object with some filesystem header information
about the path.
operationId: "ContainerArchiveInfo"
responses:
200:
description: "no error"
headers:
X-Docker-Container-Path-Stat:
type: "string"
description: |
A base64 - encoded JSON object with some filesystem header
information about the path
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
get:
summary: "Get an archive of a filesystem resource in a container"
description: "Get a tar archive of a resource in the filesystem of container id."
operationId: "ContainerArchive"
produces: ["application/x-tar"]
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Container or path does not exist"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Resource in the container’s filesystem to archive."
type: "string"
tags: ["Container"]
put:
summary: "Extract an archive of files or folders to a directory in a container"
description: |
Upload a tar archive to be extracted to a path in the filesystem of container id.
`path` parameter is asserted to be a directory. If it exists as a file, 400 error
will be returned with message "not a directory".
operationId: "PutContainerArchive"
consumes: ["application/x-tar", "application/octet-stream"]
responses:
200:
description: "The content was extracted successfully"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "not a directory"
403:
description: "Permission denied, the volume or container rootfs is marked as read-only."
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such container or path does not exist inside the container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the container"
type: "string"
- name: "path"
in: "query"
required: true
description: "Path to a directory in the container to extract the archive’s contents into. "
type: "string"
- name: "noOverwriteDirNonDir"
in: "query"
description: |
If `1`, `true`, or `True` then it will be an error if unpacking the
given content would cause an existing directory to be replaced with
a non-directory and vice versa.
type: "string"
- name: "copyUIDGID"
in: "query"
description: |
If `1`, `true`, then it will copy UID/GID maps to the dest file or
dir
type: "string"
- name: "inputStream"
in: "body"
required: true
description: |
The input stream must be a tar archive compressed with one of the
following algorithms: `identity` (no compression), `gzip`, `bzip2`,
or `xz`.
schema:
type: "string"
format: "binary"
tags: ["Container"]
/containers/prune:
post:
summary: "Delete stopped containers"
produces:
- "application/json"
operationId: "ContainerPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune containers created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune containers with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ContainerPruneResponse"
properties:
ContainersDeleted:
description: "Container IDs that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Container"]
/images/json:
get:
summary: "List Images"
description: "Returns a list of images on the server. Note that it uses a different, smaller representation of an image than inspecting a single image."
operationId: "ImageList"
produces:
- "application/json"
responses:
200:
description: "Summary image data for the images matching the query"
schema:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "all"
in: "query"
description: "Show all images. Only images from a final layer (no children) are shown by default."
type: "boolean"
default: false
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the images list.
Available filters:
- `before`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
- `dangling=true`
- `label=key` or `label="key=value"` of an image label
- `reference`=(`<image-name>[:<tag>]`)
- `since`=(`<image-name>[:<tag>]`, `<image id>` or `<image@digest>`)
type: "string"
- name: "shared-size"
in: "query"
description: "Compute and show shared size as a `SharedSize` field on each image."
type: "boolean"
default: false
- name: "digests"
in: "query"
description: "Show digest information as a `RepoDigests` field on each image."
type: "boolean"
default: false
tags: ["Image"]
/build:
post:
summary: "Build an image"
description: |
Build an image from a tar archive with a `Dockerfile` in it.
The `Dockerfile` specifies how the image is built from the tar archive. It is typically in the archive's root, but can be at a different path or have a different name by specifying the `dockerfile` parameter. [See the `Dockerfile` reference for more information](https://docs.docker.com/engine/reference/builder/).
The Docker daemon performs a preliminary validation of the `Dockerfile` before starting the build, and returns an error if the syntax is incorrect. After that, each instruction is run one-by-one until the ID of the new image is output.
The build is canceled if the client drops the connection by quitting or being killed.
operationId: "ImageBuild"
consumes:
- "application/octet-stream"
produces:
- "application/json"
parameters:
- name: "inputStream"
in: "body"
description: "A tar archive compressed with one of the following algorithms: identity (no compression), gzip, bzip2, xz."
schema:
type: "string"
format: "binary"
- name: "dockerfile"
in: "query"
description: "Path within the build context to the `Dockerfile`. This is ignored if `remote` is specified and points to an external `Dockerfile`."
type: "string"
default: "Dockerfile"
- name: "t"
in: "query"
description: "A name and optional tag to apply to the image in the `name:tag` format. If you omit the tag the default `latest` value is assumed. You can provide several `t` parameters."
type: "string"
- name: "extrahosts"
in: "query"
description: "Extra hosts to add to /etc/hosts"
type: "string"
- name: "remote"
in: "query"
description: "A Git repository URI or HTTP/HTTPS context URI. If the URI points to a single text file, the file’s contents are placed into a file called `Dockerfile` and the image is built from that file. If the URI points to a tarball, the file is downloaded by the daemon and the contents therein used as the context for the build. If the URI points to a tarball and the `dockerfile` parameter is also specified, there must be a file with the corresponding path inside the tarball."
type: "string"
- name: "q"
in: "query"
description: "Suppress verbose build output."
type: "boolean"
default: false
- name: "nocache"
in: "query"
description: "Do not use the cache when building the image."
type: "boolean"
default: false
- name: "cachefrom"
in: "query"
description: "JSON array of images used for build cache resolution."
type: "string"
- name: "pull"
in: "query"
description: "Attempt to pull the image even if an older image exists locally."
type: "string"
- name: "rm"
in: "query"
description: "Remove intermediate containers after a successful build."
type: "boolean"
default: true
- name: "forcerm"
in: "query"
description: "Always remove intermediate containers, even upon failure."
type: "boolean"
default: false
- name: "memory"
in: "query"
description: "Set memory limit for build."
type: "integer"
- name: "memswap"
in: "query"
description: "Total memory (memory + swap). Set as `-1` to disable swap."
type: "integer"
- name: "cpushares"
in: "query"
description: "CPU shares (relative weight)."
type: "integer"
- name: "cpusetcpus"
in: "query"
description: "CPUs in which to allow execution (e.g., `0-3`, `0,1`)."
type: "string"
- name: "cpuperiod"
in: "query"
description: "The length of a CPU period in microseconds."
type: "integer"
- name: "cpuquota"
in: "query"
description: "Microseconds of CPU time that the container can get in a CPU period."
type: "integer"
- name: "buildargs"
in: "query"
description: >
JSON map of string pairs for build-time variables. Users pass these values at build-time. Docker
uses the buildargs as the environment context for commands run via the `Dockerfile` RUN
instruction, or for variable expansion in other `Dockerfile` instructions. This is not meant for
passing secret values.
For example, the build arg `FOO=bar` would become `{"FOO":"bar"}` in JSON. This would result in the
query parameter `buildargs={"FOO":"bar"}`. Note that `{"FOO":"bar"}` should be URI component encoded.
[Read more about the buildargs instruction.](https://docs.docker.com/engine/reference/builder/#arg)
type: "string"
- name: "shmsize"
in: "query"
description: "Size of `/dev/shm` in bytes. The size must be greater than 0. If omitted the system uses 64MB."
type: "integer"
- name: "squash"
in: "query"
description: "Squash the resulting images layers into a single layer. *(Experimental release only.)*"
type: "boolean"
- name: "labels"
in: "query"
description: "Arbitrary key/value labels to set on the image, as a JSON map of string pairs."
type: "string"
- name: "networkmode"
in: "query"
description: |
Sets the networking mode for the run commands during build. Supported
standard values are: `bridge`, `host`, `none`, and `container:<name|id>`.
Any other value is taken as a custom network's name or ID to which this
container should connect to.
type: "string"
- name: "Content-type"
in: "header"
type: "string"
enum:
- "application/x-tar"
default: "application/x-tar"
- name: "X-Registry-Config"
in: "header"
description: |
This is a base64-encoded JSON object with auth configurations for multiple registries that a build may refer to.
The key is a registry URL, and the value is an auth configuration object, [as described in the authentication section](#section/Authentication). For example:
```
{
"docker.example.com": {
"username": "janedoe",
"password": "hunter2"
},
"https://index.docker.io/v1/": {
"username": "mobydock",
"password": "conta1n3rize14"
}
}
```
Only the registry domain name (and port if not the default 443) are required. However, for legacy reasons, the Docker Hub registry must be specified with both a `https://` prefix and a `/v1/` suffix even though Docker will prefer to use the v2 registry API.
type: "string"
- name: "platform"
in: "query"
description: "Platform in the format os[/arch[/variant]]"
type: "string"
default: ""
- name: "target"
in: "query"
description: "Target build stage"
type: "string"
default: ""
- name: "outputs"
in: "query"
description: "BuildKit output configuration"
type: "string"
default: ""
responses:
200:
description: "no error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/build/prune:
post:
summary: "Delete builder cache"
produces:
- "application/json"
operationId: "BuildPrune"
parameters:
- name: "keep-storage"
in: "query"
description: "Amount of disk space in bytes to keep for cache"
type: "integer"
format: "int64"
- name: "all"
in: "query"
type: "boolean"
description: "Remove all types of build cache"
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the list of build cache objects.
Available filters:
- `until=<duration>`: duration relative to daemon's time, during which build cache was not used, in Go's duration format (e.g., '24h')
- `id=<id>`
- `parent=<id>`
- `type=<string>`
- `description=<string>`
- `inuse`
- `shared`
- `private`
responses:
200:
description: "No error"
schema:
type: "object"
title: "BuildPruneResponse"
properties:
CachesDeleted:
type: "array"
items:
description: "ID of build cache object"
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/images/create:
post:
summary: "Create an image"
description: "Create an image by either pulling it from a registry or importing it."
operationId: "ImageCreate"
consumes:
- "text/plain"
- "application/octet-stream"
produces:
- "application/json"
responses:
200:
description: "no error"
404:
description: "repository does not exist or no read access"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "fromImage"
in: "query"
description: "Name of the image to pull. The name may include a tag or digest. This parameter may only be used when pulling an image. The pull is cancelled if the HTTP connection is closed."
type: "string"
- name: "fromSrc"
in: "query"
description: "Source to import. The value may be a URL from which the image can be retrieved or `-` to read the image from the request body. This parameter may only be used when importing an image."
type: "string"
- name: "repo"
in: "query"
description: "Repository name given to an image when it is imported. The repo may include a tag. This parameter may only be used when importing an image."
type: "string"
- name: "tag"
in: "query"
description: "Tag or digest. If empty when pulling an image, this causes all tags for the given image to be pulled."
type: "string"
- name: "message"
in: "query"
description: "Set commit message for imported image."
type: "string"
- name: "inputImage"
in: "body"
description: "Image content if the value `-` has been specified in fromSrc query parameter"
schema:
type: "string"
required: false
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "changes"
in: "query"
description: |
Apply `Dockerfile` instructions to the image that is created,
for example: `changes=ENV DEBUG=true`.
Note that `ENV DEBUG=true` should be URI component encoded.
Supported `Dockerfile` instructions:
`CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
type: "array"
items:
type: "string"
- name: "platform"
in: "query"
description: |
Platform in the format os[/arch[/variant]].
When used in combination with the `fromImage` option, the daemon checks
if the given image is present in the local image cache with the given
OS and Architecture, and otherwise attempts to pull the image. If the
option is not set, the host's native OS and Architecture are used.
If the given image does not exist in the local image cache, the daemon
attempts to pull the image with the host's native OS and Architecture.
If the given image does exists in the local image cache, but its OS or
architecture does not match, a warning is produced.
When used with the `fromSrc` option to import an image from an archive,
this option sets the platform information for the imported image. If
the option is not set, the host's native OS and Architecture are used
for the imported image.
type: "string"
default: ""
tags: ["Image"]
/images/{name}/json:
get:
summary: "Inspect an image"
description: "Return low-level information about an image."
operationId: "ImageInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/ImageInspect"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Image"]
/images/{name}/history:
get:
summary: "Get the history of an image"
description: "Return parent layers of an image."
operationId: "ImageHistory"
produces: ["application/json"]
responses:
200:
description: "List of image layers"
schema:
type: "array"
items:
type: "object"
x-go-name: HistoryResponseItem
title: "HistoryResponseItem"
description: "individual image layer information in response to ImageHistory operation"
required: [Id, Created, CreatedBy, Tags, Size, Comment]
properties:
Id:
type: "string"
x-nullable: false
Created:
type: "integer"
format: "int64"
x-nullable: false
CreatedBy:
type: "string"
x-nullable: false
Tags:
type: "array"
items:
type: "string"
Size:
type: "integer"
format: "int64"
x-nullable: false
Comment:
type: "string"
x-nullable: false
examples:
application/json:
- Id: "3db9c44f45209632d6050b35958829c3a2aa256d81b9a7be45b362ff85c54710"
Created: 1398108230
CreatedBy: "/bin/sh -c #(nop) ADD file:eb15dbd63394e063b805a3c32ca7bf0266ef64676d5a6fab4801f2e81e2a5148 in /"
Tags:
- "ubuntu:lucid"
- "ubuntu:10.04"
Size: 182964289
Comment: ""
- Id: "6cfa4d1f33fb861d4d114f43b25abd0ac737509268065cdfd69d544a59c85ab8"
Created: 1398108222
CreatedBy: "/bin/sh -c #(nop) MAINTAINER Tianon Gravi <[email protected]> - mkimage-debootstrap.sh -i iproute,iputils-ping,ubuntu-minimal -t lucid.tar.xz lucid http://archive.ubuntu.com/ubuntu/"
Tags: []
Size: 0
Comment: ""
- Id: "511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158"
Created: 1371157430
CreatedBy: ""
Tags:
- "scratch12:latest"
- "scratch:latest"
Size: 0
Comment: "Imported from -"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/{name}/push:
post:
summary: "Push an image"
description: |
Push an image to a registry.
If you wish to push an image on to a private registry, that image must
already have a tag which references the registry. For example,
`registry.example.com/myimage:latest`.
The push is cancelled if the HTTP connection is closed.
operationId: "ImagePush"
consumes:
- "application/octet-stream"
responses:
200:
description: "No error"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID."
type: "string"
required: true
- name: "tag"
in: "query"
description: "The tag to associate with the image on the registry."
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
required: true
tags: ["Image"]
/images/{name}/tag:
post:
summary: "Tag an image"
description: "Tag an image so that it becomes part of a repository."
operationId: "ImageTag"
responses:
201:
description: "No error"
400:
description: "Bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID to tag."
type: "string"
required: true
- name: "repo"
in: "query"
description: "The repository to tag in. For example, `someuser/someimage`."
type: "string"
- name: "tag"
in: "query"
description: "The name of the new tag."
type: "string"
tags: ["Image"]
/images/{name}:
delete:
summary: "Remove an image"
description: |
Remove an image, along with any untagged parent images that were
referenced by that image.
Images can't be removed if they have descendant images, are being
used by a running container or are being used by a build.
operationId: "ImageDelete"
produces: ["application/json"]
responses:
200:
description: "The image was deleted successfully"
schema:
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
examples:
application/json:
- Untagged: "3e2f21a89f"
- Deleted: "3e2f21a89f"
- Deleted: "53b4f83ac9"
404:
description: "No such image"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Conflict"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
- name: "force"
in: "query"
description: "Remove the image even if it is being used by stopped containers or has other tags"
type: "boolean"
default: false
- name: "noprune"
in: "query"
description: "Do not delete untagged parent images"
type: "boolean"
default: false
tags: ["Image"]
/images/search:
get:
summary: "Search images"
description: "Search for an image on Docker Hub."
operationId: "ImageSearch"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
type: "object"
title: "ImageSearchResponseItem"
properties:
description:
type: "string"
is_official:
type: "boolean"
is_automated:
type: "boolean"
name:
type: "string"
star_count:
type: "integer"
examples:
application/json:
- description: ""
is_official: false
is_automated: false
name: "wma55/u1210sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "jdswinbank/sshd"
star_count: 0
- description: ""
is_official: false
is_automated: false
name: "vgauthier/sshd"
star_count: 0
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "term"
in: "query"
description: "Term to search"
type: "string"
required: true
- name: "limit"
in: "query"
description: "Maximum number of results to return"
type: "integer"
- name: "filters"
in: "query"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to process on the images list. Available filters:
- `is-automated=(true|false)`
- `is-official=(true|false)`
- `stars=<number>` Matches images that has at least 'number' stars.
type: "string"
tags: ["Image"]
/images/prune:
post:
summary: "Delete unused images"
produces:
- "application/json"
operationId: "ImagePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`). Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), prune only
unused *and* untagged images. When set to `false`
(or `0`), all unused images are pruned.
- `until=<string>` Prune images created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune images with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ImagePruneResponse"
properties:
ImagesDeleted:
description: "Images that were deleted"
type: "array"
items:
$ref: "#/definitions/ImageDeleteResponseItem"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Image"]
/auth:
post:
summary: "Check auth configuration"
description: |
Validate credentials for a registry and, if available, get an identity
token for accessing the registry without password.
operationId: "SystemAuth"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "An identity token was generated successfully."
schema:
type: "object"
title: "SystemAuthResponse"
required: [Status]
properties:
Status:
description: "The status of the authentication"
type: "string"
x-nullable: false
IdentityToken:
description: "An opaque token used to authenticate a user after a successful login"
type: "string"
x-nullable: false
examples:
application/json:
Status: "Login Succeeded"
IdentityToken: "9cbaf023786cd7..."
204:
description: "No error"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "authConfig"
in: "body"
description: "Authentication to check"
schema:
$ref: "#/definitions/AuthConfig"
tags: ["System"]
/info:
get:
summary: "Get system information"
operationId: "SystemInfo"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/SystemInfo"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/version:
get:
summary: "Get version"
description: "Returns the version of Docker that is running and various information about the system that Docker is running on."
operationId: "SystemVersion"
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/SystemVersion"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/_ping:
get:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPing"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "OK"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
headers:
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
tags: ["System"]
head:
summary: "Ping"
description: "This is a dummy endpoint you can use to test if the server is accessible."
operationId: "SystemPingHead"
produces: ["text/plain"]
responses:
200:
description: "no error"
schema:
type: "string"
example: "(empty)"
headers:
API-Version:
type: "string"
description: "Max API Version the server supports"
Builder-Version:
type: "string"
description: "Default version of docker image builder"
Docker-Experimental:
type: "boolean"
description: "If the server is running with experimental mode enabled"
Swarm:
type: "string"
enum: ["inactive", "pending", "error", "locked", "active/worker", "active/manager"]
description: |
Contains information about Swarm status of the daemon,
and if the daemon is acting as a manager or worker node.
default: "inactive"
Cache-Control:
type: "string"
default: "no-cache, no-store, must-revalidate"
Pragma:
type: "string"
default: "no-cache"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["System"]
/commit:
post:
summary: "Create a new image from a container"
operationId: "ImageCommit"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "containerConfig"
in: "body"
description: "The container configuration"
schema:
$ref: "#/definitions/ContainerConfig"
- name: "container"
in: "query"
description: "The ID or name of the container to commit"
type: "string"
- name: "repo"
in: "query"
description: "Repository name for the created image"
type: "string"
- name: "tag"
in: "query"
description: "Tag name for the create image"
type: "string"
- name: "comment"
in: "query"
description: "Commit message"
type: "string"
- name: "author"
in: "query"
description: "Author of the image (e.g., `John Hannibal Smith <[email protected]>`)"
type: "string"
- name: "pause"
in: "query"
description: "Whether to pause the container before committing"
type: "boolean"
default: true
- name: "changes"
in: "query"
description: "`Dockerfile` instructions to apply while committing"
type: "string"
tags: ["Image"]
/events:
get:
summary: "Monitor events"
description: |
Stream real-time events from the server.
Various objects within Docker report events when something happens to them.
Containers report these events: `attach`, `commit`, `copy`, `create`, `destroy`, `detach`, `die`, `exec_create`, `exec_detach`, `exec_start`, `exec_die`, `export`, `health_status`, `kill`, `oom`, `pause`, `rename`, `resize`, `restart`, `start`, `stop`, `top`, `unpause`, `update`, and `prune`
Images report these events: `delete`, `import`, `load`, `pull`, `push`, `save`, `tag`, `untag`, and `prune`
Volumes report these events: `create`, `mount`, `unmount`, `destroy`, and `prune`
Networks report these events: `create`, `connect`, `disconnect`, `destroy`, `update`, `remove`, and `prune`
The Docker daemon reports these events: `reload`
Services report these events: `create`, `update`, and `remove`
Nodes report these events: `create`, `update`, and `remove`
Secrets report these events: `create`, `update`, and `remove`
Configs report these events: `create`, `update`, and `remove`
The Builder reports `prune` events
operationId: "SystemEvents"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/EventMessage"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "since"
in: "query"
description: "Show events created since this timestamp then stream new events."
type: "string"
- name: "until"
in: "query"
description: "Show events created until this timestamp then stop streaming."
type: "string"
- name: "filters"
in: "query"
description: |
A JSON encoded value of filters (a `map[string][]string`) to process on the event list. Available filters:
- `config=<string>` config name or ID
- `container=<string>` container name or ID
- `daemon=<string>` daemon name or ID
- `event=<string>` event type
- `image=<string>` image name or ID
- `label=<string>` image or container label
- `network=<string>` network name or ID
- `node=<string>` node ID
- `plugin`=<string> plugin name or ID
- `scope`=<string> local or swarm
- `secret=<string>` secret name or ID
- `service=<string>` service name or ID
- `type=<string>` object to filter by, one of `container`, `image`, `volume`, `network`, `daemon`, `plugin`, `node`, `service`, `secret` or `config`
- `volume=<string>` volume name
type: "string"
tags: ["System"]
/system/df:
get:
summary: "Get data usage information"
operationId: "SystemDataUsage"
responses:
200:
description: "no error"
schema:
type: "object"
title: "SystemDataUsageResponse"
properties:
LayersSize:
type: "integer"
format: "int64"
Images:
type: "array"
items:
$ref: "#/definitions/ImageSummary"
Containers:
type: "array"
items:
$ref: "#/definitions/ContainerSummary"
Volumes:
type: "array"
items:
$ref: "#/definitions/Volume"
BuildCache:
type: "array"
items:
$ref: "#/definitions/BuildCache"
example:
LayersSize: 1092588
Images:
-
Id: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
ParentId: ""
RepoTags:
- "busybox:latest"
RepoDigests:
- "busybox@sha256:a59906e33509d14c036c8678d687bd4eec81ed7c4b8ce907b888c607f6a1e0e6"
Created: 1466724217
Size: 1092588
SharedSize: 0
VirtualSize: 1092588
Labels: {}
Containers: 1
Containers:
-
Id: "e575172ed11dc01bfce087fb27bee502db149e1a0fad7c296ad300bbff178148"
Names:
- "/top"
Image: "busybox"
ImageID: "sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749"
Command: "top"
Created: 1472592424
Ports: []
SizeRootFs: 1092588
Labels: {}
State: "exited"
Status: "Exited (0) 56 minutes ago"
HostConfig:
NetworkMode: "default"
NetworkSettings:
Networks:
bridge:
IPAMConfig: null
Links: null
Aliases: null
NetworkID: "d687bc59335f0e5c9ee8193e5612e8aee000c8c62ea170cfb99c098f95899d92"
EndpointID: "8ed5115aeaad9abb174f68dcf135b49f11daf597678315231a32ca28441dec6a"
Gateway: "172.18.0.1"
IPAddress: "172.18.0.2"
IPPrefixLen: 16
IPv6Gateway: ""
GlobalIPv6Address: ""
GlobalIPv6PrefixLen: 0
MacAddress: "02:42:ac:12:00:02"
Mounts: []
Volumes:
-
Name: "my-volume"
Driver: "local"
Mountpoint: "/var/lib/docker/volumes/my-volume/_data"
Labels: null
Scope: "local"
Options: null
UsageData:
Size: 10920104
RefCount: 2
BuildCache:
-
ID: "hw53o5aio51xtltp5xjp8v7fx"
Parent: ""
Type: "regular"
Description: "pulled from docker.io/library/debian@sha256:234cb88d3020898631af0ccbbcca9a66ae7306ecd30c9720690858c1b007d2a0"
InUse: false
Shared: true
Size: 0
CreatedAt: "2021-06-28T13:31:01.474619385Z"
LastUsedAt: "2021-07-07T22:02:32.738075951Z"
UsageCount: 26
-
ID: "ndlpt0hhvkqcdfkputsk4cq9c"
Parent: "hw53o5aio51xtltp5xjp8v7fx"
Type: "regular"
Description: "mount / from exec /bin/sh -c echo 'Binary::apt::APT::Keep-Downloaded-Packages \"true\";' > /etc/apt/apt.conf.d/keep-cache"
InUse: false
Shared: true
Size: 51
CreatedAt: "2021-06-28T13:31:03.002625487Z"
LastUsedAt: "2021-07-07T22:02:32.773909517Z"
UsageCount: 26
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "type"
in: "query"
description: |
Object types, for which to compute and return data.
type: "array"
collectionFormat: multi
items:
type: "string"
enum: ["container", "image", "volume", "build-cache"]
tags: ["System"]
/images/{name}/get:
get:
summary: "Export an image"
description: |
Get a tarball containing all images and metadata for a repository.
If `name` is a specific name and tag (e.g. `ubuntu:latest`), then only that image (and its parents) are returned. If `name` is an image ID, similarly only that image (and its parents) are returned, but with the exclusion of the `repositories` file in the tarball, as there were no image names referenced.
### Image tarball format
An image tarball contains one directory per image layer (named using its long ID), each containing these files:
- `VERSION`: currently `1.0` - the file format version
- `json`: detailed layer information, similar to `docker inspect layer_id`
- `layer.tar`: A tarfile containing the filesystem changes in this layer
The `layer.tar` file contains `aufs` style `.wh..wh.aufs` files and directories for storing attribute changes and deletions.
If the tarball defines a repository, the tarball should also include a `repositories` file at the root that contains a list of repository and tag names mapped to layer IDs.
```json
{
"hello-world": {
"latest": "565a9d68a73f6706862bfe8409a7f659776d4d60a8d096eb4a3cbce6999cc2a1"
}
}
```
operationId: "ImageGet"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or ID"
type: "string"
required: true
tags: ["Image"]
/images/get:
get:
summary: "Export several images"
description: |
Get a tarball containing all images and metadata for several image
repositories.
For each value of the `names` parameter: if it is a specific name and
tag (e.g. `ubuntu:latest`), then only that image (and its parents) are
returned; if it is an image ID, similarly only that image (and its parents)
are returned and there would be no names referenced in the 'repositories'
file for this image ID.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageGetAll"
produces:
- "application/x-tar"
responses:
200:
description: "no error"
schema:
type: "string"
format: "binary"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "names"
in: "query"
description: "Image names to filter by"
type: "array"
items:
type: "string"
tags: ["Image"]
/images/load:
post:
summary: "Import images"
description: |
Load a set of images and tags into a repository.
For details on the format, see the [export image endpoint](#operation/ImageGet).
operationId: "ImageLoad"
consumes:
- "application/x-tar"
produces:
- "application/json"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "imagesTarball"
in: "body"
description: "Tar archive containing images"
schema:
type: "string"
format: "binary"
- name: "quiet"
in: "query"
description: "Suppress progress details during load."
type: "boolean"
default: false
tags: ["Image"]
/containers/{id}/exec:
post:
summary: "Create an exec instance"
description: "Run a command inside a running container."
operationId: "ContainerExec"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
404:
description: "no such container"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such container: c2ada9df5af8"
409:
description: "container is paused"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execConfig"
in: "body"
description: "Exec configuration"
schema:
type: "object"
title: "ExecConfig"
properties:
AttachStdin:
type: "boolean"
description: "Attach to `stdin` of the exec command."
AttachStdout:
type: "boolean"
description: "Attach to `stdout` of the exec command."
AttachStderr:
type: "boolean"
description: "Attach to `stderr` of the exec command."
DetachKeys:
type: "string"
description: |
Override the key sequence for detaching a container. Format is
a single character `[a-Z]` or `ctrl-<value>` where `<value>`
is one of: `a-z`, `@`, `^`, `[`, `,` or `_`.
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
Env:
description: |
A list of environment variables in the form `["VAR=value", ...]`.
type: "array"
items:
type: "string"
Cmd:
type: "array"
description: "Command to run, as a string or array of strings."
items:
type: "string"
Privileged:
type: "boolean"
description: "Runs the exec process with extended privileges."
default: false
User:
type: "string"
description: |
The user, and optionally, group to run the exec process inside
the container. Format is one of: `user`, `user:group`, `uid`,
or `uid:gid`.
WorkingDir:
type: "string"
description: |
The working directory for the exec process inside the container.
example:
AttachStdin: false
AttachStdout: true
AttachStderr: true
DetachKeys: "ctrl-p,ctrl-q"
Tty: false
Cmd:
- "date"
Env:
- "FOO=bar"
- "BAZ=quux"
required: true
- name: "id"
in: "path"
description: "ID or name of container"
type: "string"
required: true
tags: ["Exec"]
/exec/{id}/start:
post:
summary: "Start an exec instance"
description: |
Starts a previously set up exec instance. If detach is true, this endpoint
returns immediately after starting the command. Otherwise, it sets up an
interactive session with the command.
operationId: "ExecStart"
consumes:
- "application/json"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "No error"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Container is stopped or paused"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "execStartConfig"
in: "body"
schema:
type: "object"
title: "ExecStartConfig"
properties:
Detach:
type: "boolean"
description: "Detach from the command."
Tty:
type: "boolean"
description: "Allocate a pseudo-TTY."
example:
Detach: false
Tty: false
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/exec/{id}/resize:
post:
summary: "Resize an exec instance"
description: |
Resize the TTY session used by an exec instance. This endpoint only works
if `tty` was specified as part of creating and starting the exec instance.
operationId: "ExecResize"
responses:
200:
description: "No error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
- name: "h"
in: "query"
description: "Height of the TTY session in characters"
type: "integer"
- name: "w"
in: "query"
description: "Width of the TTY session in characters"
type: "integer"
tags: ["Exec"]
/exec/{id}/json:
get:
summary: "Inspect an exec instance"
description: "Return low-level information about an exec instance."
operationId: "ExecInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "object"
title: "ExecInspectResponse"
properties:
CanRemove:
type: "boolean"
DetachKeys:
type: "string"
ID:
type: "string"
Running:
type: "boolean"
ExitCode:
type: "integer"
ProcessConfig:
$ref: "#/definitions/ProcessConfig"
OpenStdin:
type: "boolean"
OpenStderr:
type: "boolean"
OpenStdout:
type: "boolean"
ContainerID:
type: "string"
Pid:
type: "integer"
description: "The system process ID for the exec process."
examples:
application/json:
CanRemove: false
ContainerID: "b53ee82b53a40c7dca428523e34f741f3abc51d9f297a14ff874bf761b995126"
DetachKeys: ""
ExitCode: 2
ID: "f33bbfb39f5b142420f4759b2348913bd4a8d1a6d7fd56499cb41a1bb91d7b3b"
OpenStderr: true
OpenStdin: true
OpenStdout: true
ProcessConfig:
arguments:
- "-c"
- "exit 2"
entrypoint: "sh"
privileged: false
tty: true
user: "1000"
Running: false
Pid: 42000
404:
description: "No such exec instance"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Exec instance ID"
required: true
type: "string"
tags: ["Exec"]
/volumes:
get:
summary: "List volumes"
operationId: "VolumeList"
produces: ["application/json"]
responses:
200:
description: "Summary volume data that matches the query"
schema:
$ref: "#/definitions/VolumeListResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to
process on the volumes list. Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
volumes that are not in use by a container. When set to `false`
(or `0`), only volumes that are in use by one or more
containers are returned.
- `driver=<volume-driver-name>` Matches volumes based on their driver.
- `label=<key>` or `label=<key>:<value>` Matches volumes based on
the presence of a `label` alone or a `label` and a value.
- `name=<volume-name>` Matches all or part of a volume name.
type: "string"
format: "json"
tags: ["Volume"]
/volumes/create:
post:
summary: "Create a volume"
operationId: "VolumeCreate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
201:
description: "The volume was created successfully"
schema:
$ref: "#/definitions/Volume"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "volumeConfig"
in: "body"
required: true
description: "Volume configuration"
schema:
$ref: "#/definitions/VolumeCreateOptions"
tags: ["Volume"]
/volumes/{name}:
get:
summary: "Inspect a volume"
operationId: "VolumeInspect"
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Volume"
404:
description: "No such volume"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
tags: ["Volume"]
put:
summary: |
"Update a volume. Valid only for Swarm cluster volumes"
operationId: "VolumeUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such volume"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "The name or ID of the volume"
type: "string"
required: true
- name: "body"
in: "body"
schema:
# though the schema for is an object that contains only a
# ClusterVolumeSpec, wrapping the ClusterVolumeSpec in this object
# means that if, later on, we support things like changing the
# labels, we can do so without duplicating that information to the
# ClusterVolumeSpec.
type: "object"
description: "Volume configuration"
properties:
Spec:
$ref: "#/definitions/ClusterVolumeSpec"
description: |
The spec of the volume to update. Currently, only Availability may
change. All other fields must remain unchanged.
- name: "version"
in: "query"
description: |
The version number of the volume being updated. This is required to
avoid conflicting writes. Found in the volume's `ClusterVolume`
field.
type: "integer"
format: "int64"
required: true
tags: ["Volume"]
delete:
summary: "Remove a volume"
description: "Instruct the driver to remove the volume."
operationId: "VolumeDelete"
responses:
204:
description: "The volume was removed"
404:
description: "No such volume or volume driver"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "Volume is in use and cannot be removed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
required: true
description: "Volume name or ID"
type: "string"
- name: "force"
in: "query"
description: "Force the removal of the volume"
type: "boolean"
default: false
tags: ["Volume"]
/volumes/prune:
post:
summary: "Delete unused volumes"
produces:
- "application/json"
operationId: "VolumePrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune volumes with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "VolumePruneResponse"
properties:
VolumesDeleted:
description: "Volumes that were deleted"
type: "array"
items:
type: "string"
SpaceReclaimed:
description: "Disk space reclaimed in bytes"
type: "integer"
format: "int64"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Volume"]
/networks:
get:
summary: "List networks"
description: |
Returns a list of networks. For details on the format, see the
[network inspect endpoint](#operation/NetworkInspect).
Note that it uses a different, smaller representation of a network than
inspecting a single network. For example, the list of containers attached
to the network is not propagated in API versions 1.28 and up.
operationId: "NetworkList"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Network"
examples:
application/json:
- Name: "bridge"
Id: "f2de39df4171b0dc801e8002d1d999b77256983dfc63041c0f34030aa3977566"
Created: "2016-10-19T06:21:00.416543526Z"
Scope: "local"
Driver: "bridge"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config:
-
Subnet: "172.17.0.0/16"
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
- Name: "none"
Id: "e086a3893b05ab69242d3c44e49483a3bbbd3a26b46baa8f61ab797c1088d794"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "null"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
- Name: "host"
Id: "13e871235c677f196c4e1ecebb9dc733b9b2d2ab589e30c539efeda84a24215e"
Created: "0001-01-01T00:00:00Z"
Scope: "local"
Driver: "host"
EnableIPv6: false
Internal: false
Attachable: false
Ingress: false
IPAM:
Driver: "default"
Config: []
Containers: {}
Options: {}
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
JSON encoded value of the filters (a `map[string][]string`) to process
on the networks list.
Available filters:
- `dangling=<boolean>` When set to `true` (or `1`), returns all
networks that are not in use by a container. When set to `false`
(or `0`), only networks that are in use by one or more
containers are returned.
- `driver=<driver-name>` Matches a network's driver.
- `id=<network-id>` Matches all or part of a network ID.
- `label=<key>` or `label=<key>=<value>` of a network label.
- `name=<network-name>` Matches all or part of a network name.
- `scope=["swarm"|"global"|"local"]` Filters networks by scope (`swarm`, `global`, or `local`).
- `type=["custom"|"builtin"]` Filters networks by type. The `custom` keyword returns all user-defined networks.
type: "string"
tags: ["Network"]
/networks/{id}:
get:
summary: "Inspect a network"
operationId: "NetworkInspect"
produces:
- "application/json"
responses:
200:
description: "No error"
schema:
$ref: "#/definitions/Network"
404:
description: "Network not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "verbose"
in: "query"
description: "Detailed inspect output for troubleshooting"
type: "boolean"
default: false
- name: "scope"
in: "query"
description: "Filter the network by scope (swarm, global, or local)"
type: "string"
tags: ["Network"]
delete:
summary: "Remove a network"
operationId: "NetworkDelete"
responses:
204:
description: "No error"
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such network"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
tags: ["Network"]
/networks/create:
post:
summary: "Create a network"
operationId: "NetworkCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "No error"
schema:
type: "object"
title: "NetworkCreateResponse"
properties:
Id:
description: "The ID of the created network."
type: "string"
Warning:
type: "string"
example:
Id: "22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30"
Warning: ""
403:
description: "operation not supported for pre-defined networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "plugin not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "networkConfig"
in: "body"
description: "Network configuration"
required: true
schema:
type: "object"
title: "NetworkCreateRequest"
required: ["Name"]
properties:
Name:
description: "The network's name."
type: "string"
CheckDuplicate:
description: |
Check for networks with duplicate names. Since Network is
primarily keyed based on a random ID and not on the name, and
network name is strictly a user-friendly alias to the network
which is uniquely identified using ID, there is no guaranteed
way to check for duplicates. CheckDuplicate is there to provide
a best effort checking of any networks which has the same name
but it is not guaranteed to catch all name collisions.
type: "boolean"
Driver:
description: "Name of the network driver plugin to use."
type: "string"
default: "bridge"
Internal:
description: "Restrict external access to the network."
type: "boolean"
Attachable:
description: |
Globally scoped network is manually attachable by regular
containers from workers in swarm mode.
type: "boolean"
Ingress:
description: |
Ingress network is the network which provides the routing-mesh
in swarm mode.
type: "boolean"
IPAM:
description: "Optional custom IP scheme for the network."
$ref: "#/definitions/IPAM"
EnableIPv6:
description: "Enable IPv6 on the network."
type: "boolean"
Options:
description: "Network specific options to be used by the drivers."
type: "object"
additionalProperties:
type: "string"
Labels:
description: "User-defined key/value metadata."
type: "object"
additionalProperties:
type: "string"
example:
Name: "isolated_nw"
CheckDuplicate: false
Driver: "bridge"
EnableIPv6: true
IPAM:
Driver: "default"
Config:
- Subnet: "172.20.0.0/16"
IPRange: "172.20.10.0/24"
Gateway: "172.20.10.11"
- Subnet: "2001:db8:abcd::/64"
Gateway: "2001:db8:abcd::1011"
Options:
foo: "bar"
Internal: true
Attachable: false
Ingress: false
Options:
com.docker.network.bridge.default_bridge: "true"
com.docker.network.bridge.enable_icc: "true"
com.docker.network.bridge.enable_ip_masquerade: "true"
com.docker.network.bridge.host_binding_ipv4: "0.0.0.0"
com.docker.network.bridge.name: "docker0"
com.docker.network.driver.mtu: "1500"
Labels:
com.example.some-label: "some-value"
com.example.some-other-label: "some-other-value"
tags: ["Network"]
/networks/{id}/connect:
post:
summary: "Connect a container to a network"
operationId: "NetworkConnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkConnectRequest"
properties:
Container:
type: "string"
description: "The ID or name of the container to connect to the network."
EndpointConfig:
$ref: "#/definitions/EndpointSettings"
example:
Container: "3613f73ba0e4"
EndpointConfig:
IPAMConfig:
IPv4Address: "172.24.56.89"
IPv6Address: "2001:db8::5689"
tags: ["Network"]
/networks/{id}/disconnect:
post:
summary: "Disconnect a container from a network"
operationId: "NetworkDisconnect"
consumes:
- "application/json"
responses:
200:
description: "No error"
403:
description: "Operation not supported for swarm scoped networks"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "Network or container not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "Network ID or name"
required: true
type: "string"
- name: "container"
in: "body"
required: true
schema:
type: "object"
title: "NetworkDisconnectRequest"
properties:
Container:
type: "string"
description: |
The ID or name of the container to disconnect from the network.
Force:
type: "boolean"
description: |
Force the container to disconnect from the network.
tags: ["Network"]
/networks/prune:
post:
summary: "Delete unused networks"
produces:
- "application/json"
operationId: "NetworkPrune"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the prune list, encoded as JSON (a `map[string][]string`).
Available filters:
- `until=<timestamp>` Prune networks created before this timestamp. The `<timestamp>` can be Unix timestamps, date formatted timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed relative to the daemon machine’s time.
- `label` (`label=<key>`, `label=<key>=<value>`, `label!=<key>`, or `label!=<key>=<value>`) Prune networks with (or without, in case `label!=...` is used) the specified labels.
type: "string"
responses:
200:
description: "No error"
schema:
type: "object"
title: "NetworkPruneResponse"
properties:
NetworksDeleted:
description: "Networks that were deleted"
type: "array"
items:
type: "string"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Network"]
/plugins:
get:
summary: "List plugins"
operationId: "PluginList"
description: "Returns information about installed plugins."
produces: ["application/json"]
responses:
200:
description: "No error"
schema:
type: "array"
items:
$ref: "#/definitions/Plugin"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the plugin list.
Available filters:
- `capability=<capability name>`
- `enable=<true>|<false>`
tags: ["Plugin"]
/plugins/privileges:
get:
summary: "Get plugin privileges"
operationId: "GetPluginPrivileges"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags:
- "Plugin"
/plugins/pull:
post:
summary: "Install a plugin"
operationId: "PluginPull"
description: |
Pulls and installs a plugin. After the plugin is installed, it can be
enabled using the [`POST /plugins/{name}/enable` endpoint](#operation/PostPluginsEnable).
produces:
- "application/json"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "remote"
in: "query"
description: |
Remote reference for plugin to install.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "name"
in: "query"
description: |
Local name for the pulled plugin.
The `:latest` tag is optional, and is used as the default if omitted.
required: false
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/{name}/json:
get:
summary: "Inspect a plugin"
operationId: "PluginInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}:
delete:
summary: "Remove a plugin"
operationId: "PluginDelete"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Plugin"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "force"
in: "query"
description: |
Disable the plugin before removing. This may result in issues if the
plugin is in use by a container.
type: "boolean"
default: false
tags: ["Plugin"]
/plugins/{name}/enable:
post:
summary: "Enable a plugin"
operationId: "PluginEnable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "timeout"
in: "query"
description: "Set the HTTP client timeout (in seconds)"
type: "integer"
default: 0
tags: ["Plugin"]
/plugins/{name}/disable:
post:
summary: "Disable a plugin"
operationId: "PluginDisable"
responses:
200:
description: "no error"
404:
description: "plugin is not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
tags: ["Plugin"]
/plugins/{name}/upgrade:
post:
summary: "Upgrade a plugin"
operationId: "PluginUpgrade"
responses:
204:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "remote"
in: "query"
description: |
Remote reference to upgrade to.
The `:latest` tag is optional, and is used as the default if omitted.
required: true
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration to use when pulling a plugin
from a registry.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
$ref: "#/definitions/PluginPrivilege"
example:
- Name: "network"
Description: ""
Value:
- "host"
- Name: "mount"
Description: ""
Value:
- "/data"
- Name: "device"
Description: ""
Value:
- "/dev/cpu_dma_latency"
tags: ["Plugin"]
/plugins/create:
post:
summary: "Create a plugin"
operationId: "PluginCreate"
consumes:
- "application/x-tar"
responses:
204:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "query"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "tarContext"
in: "body"
description: "Path to tar containing plugin rootfs and manifest"
schema:
type: "string"
format: "binary"
tags: ["Plugin"]
/plugins/{name}/push:
post:
summary: "Push a plugin"
operationId: "PluginPush"
description: |
Push a plugin to the registry.
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
responses:
200:
description: "no error"
404:
description: "plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/plugins/{name}/set:
post:
summary: "Configure a plugin"
operationId: "PluginSet"
consumes:
- "application/json"
parameters:
- name: "name"
in: "path"
description: |
The name of the plugin. The `:latest` tag is optional, and is the
default if omitted.
required: true
type: "string"
- name: "body"
in: "body"
schema:
type: "array"
items:
type: "string"
example: ["DEBUG=1"]
responses:
204:
description: "No error"
404:
description: "Plugin not installed"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Plugin"]
/nodes:
get:
summary: "List nodes"
operationId: "NodeList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Node"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
description: |
Filters to process on the nodes list, encoded as JSON (a `map[string][]string`).
Available filters:
- `id=<node id>`
- `label=<engine label>`
- `membership=`(`accepted`|`pending`)`
- `name=<node name>`
- `node.label=<node label>`
- `role=`(`manager`|`worker`)`
type: "string"
tags: ["Node"]
/nodes/{id}:
get:
summary: "Inspect a node"
operationId: "NodeInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Node"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
tags: ["Node"]
delete:
summary: "Delete a node"
operationId: "NodeDelete"
responses:
200:
description: "no error"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the node"
type: "string"
required: true
- name: "force"
in: "query"
description: "Force remove a node from the swarm"
default: false
type: "boolean"
tags: ["Node"]
/nodes/{id}/update:
post:
summary: "Update a node"
operationId: "NodeUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such node"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID of the node"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/NodeSpec"
- name: "version"
in: "query"
description: |
The version number of the node object being updated. This is required
to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Node"]
/swarm:
get:
summary: "Inspect swarm"
operationId: "SwarmInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Swarm"
404:
description: "no such swarm"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/init:
post:
summary: "Initialize a new swarm"
operationId: "SwarmInit"
produces:
- "application/json"
- "text/plain"
responses:
200:
description: "no error"
schema:
description: "The node ID"
type: "string"
example: "7v2t30z9blmxuhnyo6s4cpenp"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmInitRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication, as well
as determining the networking interface used for the VXLAN
Tunnel Endpoint (VTEP). This can either be an address/port
combination in the form `192.168.1.1:4567`, or an interface
followed by a port number, like `eth0:4567`. If the port number
is omitted, the default swarm listening port is used.
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
DataPathPort:
description: |
DataPathPort specifies the data path port number for data traffic.
Acceptable port range is 1024 to 49151.
if no port is set or is set to 0, default port 4789 will be used.
type: "integer"
format: "uint32"
DefaultAddrPool:
description: |
Default Address Pool specifies default subnet pools for global
scope networks.
type: "array"
items:
type: "string"
example: ["10.10.0.0/16", "20.20.0.0/16"]
ForceNewCluster:
description: "Force creation of a new swarm."
type: "boolean"
SubnetSize:
description: |
SubnetSize specifies the subnet size of the networks created
from the default subnet pool.
type: "integer"
format: "uint32"
Spec:
$ref: "#/definitions/SwarmSpec"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
DataPathPort: 4789
DefaultAddrPool: ["10.10.0.0/8", "20.20.0.0/8"]
SubnetSize: 24
ForceNewCluster: false
Spec:
Orchestration: {}
Raft: {}
Dispatcher: {}
CAConfig: {}
EncryptionConfig:
AutoLockManagers: false
tags: ["Swarm"]
/swarm/join:
post:
summary: "Join an existing swarm"
operationId: "SwarmJoin"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is already part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmJoinRequest"
properties:
ListenAddr:
description: |
Listen address used for inter-manager communication if the node
gets promoted to manager, as well as determining the networking
interface used for the VXLAN Tunnel Endpoint (VTEP).
type: "string"
AdvertiseAddr:
description: |
Externally reachable address advertised to other nodes. This
can either be an address/port combination in the form
`192.168.1.1:4567`, or an interface followed by a port number,
like `eth0:4567`. If the port number is omitted, the port
number from the listen address is used. If `AdvertiseAddr` is
not specified, it will be automatically detected when possible.
type: "string"
DataPathAddr:
description: |
Address or interface to use for data path traffic (format:
`<ip|interface>`), for example, `192.168.1.1`, or an interface,
like `eth0`. If `DataPathAddr` is unspecified, the same address
as `AdvertiseAddr` is used.
The `DataPathAddr` specifies the address that global scope
network drivers will publish towards other nodes in order to
reach the containers running on this node. Using this parameter
it is possible to separate the container data traffic from the
management traffic of the cluster.
type: "string"
RemoteAddrs:
description: |
Addresses of manager nodes already participating in the swarm.
type: "array"
items:
type: "string"
JoinToken:
description: "Secret token for joining this swarm."
type: "string"
example:
ListenAddr: "0.0.0.0:2377"
AdvertiseAddr: "192.168.1.1:2377"
RemoteAddrs:
- "node1:2377"
JoinToken: "SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-7p73s1dx5in4tatdymyhg9hu2"
tags: ["Swarm"]
/swarm/leave:
post:
summary: "Leave a swarm"
operationId: "SwarmLeave"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "force"
description: |
Force leave swarm, even if this is the last manager or that it will
break the cluster.
in: "query"
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/update:
post:
summary: "Update a swarm"
operationId: "SwarmUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
$ref: "#/definitions/SwarmSpec"
- name: "version"
in: "query"
description: |
The version number of the swarm object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
- name: "rotateWorkerToken"
in: "query"
description: "Rotate the worker join token."
type: "boolean"
default: false
- name: "rotateManagerToken"
in: "query"
description: "Rotate the manager join token."
type: "boolean"
default: false
- name: "rotateManagerUnlockKey"
in: "query"
description: "Rotate the manager unlock key."
type: "boolean"
default: false
tags: ["Swarm"]
/swarm/unlockkey:
get:
summary: "Get the unlock key"
operationId: "SwarmUnlockkey"
consumes:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "object"
title: "UnlockKeyResponse"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/swarm/unlock:
post:
summary: "Unlock a locked manager"
operationId: "SwarmUnlock"
consumes:
- "application/json"
produces:
- "application/json"
parameters:
- name: "body"
in: "body"
required: true
schema:
type: "object"
title: "SwarmUnlockRequest"
properties:
UnlockKey:
description: "The swarm's unlock key."
type: "string"
example:
UnlockKey: "SWMKEY-1-7c37Cc8654o6p38HnroywCi19pllOnGtbdZEgtKxZu8"
responses:
200:
description: "no error"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Swarm"]
/services:
get:
summary: "List services"
operationId: "ServiceList"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Service"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the services list.
Available filters:
- `id=<service id>`
- `label=<service label>`
- `mode=["replicated"|"global"]`
- `name=<service name>`
- name: "status"
in: "query"
type: "boolean"
description: |
Include service status, with count of running and desired tasks.
tags: ["Service"]
/services/create:
post:
summary: "Create a service"
operationId: "ServiceCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
type: "object"
title: "ServiceCreateResponse"
properties:
ID:
description: "The ID of the created service."
type: "string"
Warning:
description: "Optional warning message"
type: "string"
example:
ID: "ak7w3gjqoa3kuz8xcpnyy0pvl"
Warning: "unable to pin image doesnotexist:latest to digest: image library/doesnotexist:latest not found"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
403:
description: "network is not eligible for services"
schema:
$ref: "#/definitions/ErrorResponse"
409:
description: "name conflicts with an existing service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "web"
TaskTemplate:
ContainerSpec:
Image: "nginx:alpine"
Mounts:
-
ReadOnly: true
Source: "web-data"
Target: "/usr/share/nginx/html"
Type: "volume"
VolumeOptions:
DriverConfig: {}
Labels:
com.example.something: "something-value"
Hosts: ["10.10.10.10 host1", "ABCD:EF01:2345:6789:ABCD:EF01:2345:6789 host2"]
User: "33"
DNSConfig:
Nameservers: ["8.8.8.8"]
Search: ["example.org"]
Options: ["timeout:3"]
Secrets:
-
File:
Name: "www.example.org.key"
UID: "33"
GID: "33"
Mode: 384
SecretID: "fpjqlhnwb19zds35k8wn80lq9"
SecretName: "example_org_domain_key"
LogDriver:
Name: "json-file"
Options:
max-file: "3"
max-size: "10M"
Placement: {}
Resources:
Limits:
MemoryBytes: 104857600
Reservations: {}
RestartPolicy:
Condition: "on-failure"
Delay: 10000000000
MaxAttempts: 10
Mode:
Replicated:
Replicas: 4
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Ports:
-
Protocol: "tcp"
PublishedPort: 8080
TargetPort: 80
Labels:
foo: "bar"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}:
get:
summary: "Inspect a service"
operationId: "ServiceInspect"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Service"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "insertDefaults"
in: "query"
description: "Fill empty fields with default values."
type: "boolean"
default: false
tags: ["Service"]
delete:
summary: "Delete a service"
operationId: "ServiceDelete"
responses:
200:
description: "no error"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
tags: ["Service"]
/services/{id}/update:
post:
summary: "Update a service"
operationId: "ServiceUpdate"
consumes: ["application/json"]
produces: ["application/json"]
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/ServiceUpdateResponse"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID or name of service."
required: true
type: "string"
- name: "body"
in: "body"
required: true
schema:
allOf:
- $ref: "#/definitions/ServiceSpec"
- type: "object"
example:
Name: "top"
TaskTemplate:
ContainerSpec:
Image: "busybox"
Args:
- "top"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ForceUpdate: 0
Mode:
Replicated:
Replicas: 1
UpdateConfig:
Parallelism: 2
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
RollbackConfig:
Parallelism: 1
Delay: 1000000000
FailureAction: "pause"
Monitor: 15000000000
MaxFailureRatio: 0.15
EndpointSpec:
Mode: "vip"
- name: "version"
in: "query"
description: |
The version number of the service object being updated. This is
required to avoid conflicting writes.
This version number should be the value as currently set on the
service *before* the update. You can find the current version by
calling `GET /services/{id}`
required: true
type: "integer"
- name: "registryAuthFrom"
in: "query"
description: |
If the `X-Registry-Auth` header is not specified, this parameter
indicates where to find registry authorization credentials.
type: "string"
enum: ["spec", "previous-spec"]
default: "spec"
- name: "rollback"
in: "query"
description: |
Set to this parameter to `previous` to cause a server-side rollback
to the previous service spec. The supplied spec will be ignored in
this case.
type: "string"
- name: "X-Registry-Auth"
in: "header"
description: |
A base64url-encoded auth configuration for pulling from private
registries.
Refer to the [authentication section](#section/Authentication) for
details.
type: "string"
tags: ["Service"]
/services/{id}/logs:
get:
summary: "Get service logs"
description: |
Get `stdout` and `stderr` logs from a service. See also
[`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
operationId: "ServiceLogs"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such service"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such service: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID or name of the service"
type: "string"
- name: "details"
in: "query"
description: "Show service context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Service"]
/tasks:
get:
summary: "List tasks"
operationId: "TaskList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Task"
example:
- ID: "0kzzo1i0y4jz6027t0k7aezc7"
Version:
Index: 71
CreatedAt: "2016-06-07T21:07:31.171892745Z"
UpdatedAt: "2016-06-07T21:07:31.376370513Z"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:31.290032978Z"
State: "running"
Message: "started"
ContainerStatus:
ContainerID: "e5d62702a1b48d01c3e02ca1e0212a250801fa8d67caca0b6f35919ebc12f035"
PID: 677
DesiredState: "running"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.10/16"
- ID: "1yljwbmlr8er2waf8orvqpwms"
Version:
Index: 30
CreatedAt: "2016-06-07T21:07:30.019104782Z"
UpdatedAt: "2016-06-07T21:07:30.231958098Z"
Name: "hopeful_cori"
Spec:
ContainerSpec:
Image: "redis"
Resources:
Limits: {}
Reservations: {}
RestartPolicy:
Condition: "any"
MaxAttempts: 0
Placement: {}
ServiceID: "9mnpnzenvg8p8tdbtq4wvbkcz"
Slot: 1
NodeID: "60gvrl6tm78dmak4yl7srz94v"
Status:
Timestamp: "2016-06-07T21:07:30.202183143Z"
State: "shutdown"
Message: "shutdown"
ContainerStatus:
ContainerID: "1cf8d63d18e79668b0004a4be4c6ee58cddfad2dae29506d8781581d0688a213"
DesiredState: "shutdown"
NetworksAttachments:
- Network:
ID: "4qvuz4ko70xaltuqbt8956gd1"
Version:
Index: 18
CreatedAt: "2016-06-07T20:31:11.912919752Z"
UpdatedAt: "2016-06-07T21:07:29.955277358Z"
Spec:
Name: "ingress"
Labels:
com.docker.swarm.internal: "true"
DriverConfiguration: {}
IPAMOptions:
Driver: {}
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
DriverState:
Name: "overlay"
Options:
com.docker.network.driver.overlay.vxlanid_list: "256"
IPAMOptions:
Driver:
Name: "default"
Configs:
- Subnet: "10.255.0.0/16"
Gateway: "10.255.0.1"
Addresses:
- "10.255.0.5/16"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the tasks list.
Available filters:
- `desired-state=(running | shutdown | accepted)`
- `id=<task id>`
- `label=key` or `label="key=value"`
- `name=<task name>`
- `node=<node id or name>`
- `service=<service name>`
tags: ["Task"]
/tasks/{id}:
get:
summary: "Inspect a task"
operationId: "TaskInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Task"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "ID of the task"
required: true
type: "string"
tags: ["Task"]
/tasks/{id}/logs:
get:
summary: "Get task logs"
description: |
Get `stdout` and `stderr` logs from a task.
See also [`/containers/{id}/logs`](#operation/ContainerLogs).
**Note**: This endpoint works only for services with the `local`,
`json-file` or `journald` logging drivers.
operationId: "TaskLogs"
produces:
- "application/vnd.docker.raw-stream"
- "application/vnd.docker.multiplexed-stream"
responses:
200:
description: "logs returned as a stream in response body"
schema:
type: "string"
format: "binary"
404:
description: "no such task"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such task: c2ada9df5af8"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
description: "ID of the task"
type: "string"
- name: "details"
in: "query"
description: "Show task context and extra details provided to logs."
type: "boolean"
default: false
- name: "follow"
in: "query"
description: "Keep connection after returning logs."
type: "boolean"
default: false
- name: "stdout"
in: "query"
description: "Return logs from `stdout`"
type: "boolean"
default: false
- name: "stderr"
in: "query"
description: "Return logs from `stderr`"
type: "boolean"
default: false
- name: "since"
in: "query"
description: "Only return logs since this time, as a UNIX timestamp"
type: "integer"
default: 0
- name: "timestamps"
in: "query"
description: "Add timestamps to every log line"
type: "boolean"
default: false
- name: "tail"
in: "query"
description: |
Only return this number of log lines from the end of the logs.
Specify as an integer or `all` to output all log lines.
type: "string"
default: "all"
tags: ["Task"]
/secrets:
get:
summary: "List secrets"
operationId: "SecretList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Secret"
example:
- ID: "blt1owaxmitz71s9v5zh81zun"
Version:
Index: 85
CreatedAt: "2017-07-20T13:55:28.678958722Z"
UpdatedAt: "2017-07-20T13:55:28.678958722Z"
Spec:
Name: "mysql-passwd"
Labels:
some.label: "some.value"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the secrets list.
Available filters:
- `id=<secret id>`
- `label=<key> or label=<key>=value`
- `name=<secret name>`
- `names=<secret name>`
tags: ["Secret"]
/secrets/create:
post:
summary: "Create a secret"
operationId: "SecretCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/SecretSpec"
- type: "object"
example:
Name: "app-key.crt"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
tags: ["Secret"]
/secrets/{id}:
get:
summary: "Inspect a secret"
operationId: "SecretInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Secret"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
Labels:
foo: "bar"
Driver:
Name: "secret-bucket"
Options:
OptionA: "value for driver option A"
OptionB: "value for driver option B"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
delete:
summary: "Delete a secret"
operationId: "SecretDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "secret not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the secret"
tags: ["Secret"]
/secrets/{id}/update:
post:
summary: "Update a Secret"
operationId: "SecretUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such secret"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the secret"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/SecretSpec"
description: |
The spec of the secret to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[SecretInspect endpoint](#operation/SecretInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the secret object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Secret"]
/configs:
get:
summary: "List configs"
operationId: "ConfigList"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
type: "array"
items:
$ref: "#/definitions/Config"
example:
- ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "server.conf"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "filters"
in: "query"
type: "string"
description: |
A JSON encoded value of the filters (a `map[string][]string`) to
process on the configs list.
Available filters:
- `id=<config id>`
- `label=<key> or label=<key>=value`
- `name=<config name>`
- `names=<config name>`
tags: ["Config"]
/configs/create:
post:
summary: "Create a config"
operationId: "ConfigCreate"
consumes:
- "application/json"
produces:
- "application/json"
responses:
201:
description: "no error"
schema:
$ref: "#/definitions/IdResponse"
409:
description: "name conflicts with an existing object"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "body"
in: "body"
schema:
allOf:
- $ref: "#/definitions/ConfigSpec"
- type: "object"
example:
Name: "server.conf"
Labels:
foo: "bar"
Data: "VEhJUyBJUyBOT1QgQSBSRUFMIENFUlRJRklDQVRFCg=="
tags: ["Config"]
/configs/{id}:
get:
summary: "Inspect a config"
operationId: "ConfigInspect"
produces:
- "application/json"
responses:
200:
description: "no error"
schema:
$ref: "#/definitions/Config"
examples:
application/json:
ID: "ktnbjxoalbkvbvedmg1urrz8h"
Version:
Index: 11
CreatedAt: "2016-11-05T01:20:17.327670065Z"
UpdatedAt: "2016-11-05T01:20:17.327670065Z"
Spec:
Name: "app-dev.crt"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
delete:
summary: "Delete a config"
operationId: "ConfigDelete"
produces:
- "application/json"
responses:
204:
description: "no error"
404:
description: "config not found"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
required: true
type: "string"
description: "ID of the config"
tags: ["Config"]
/configs/{id}/update:
post:
summary: "Update a Config"
operationId: "ConfigUpdate"
responses:
200:
description: "no error"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
404:
description: "no such config"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
503:
description: "node is not part of a swarm"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "id"
in: "path"
description: "The ID or name of the config"
type: "string"
required: true
- name: "body"
in: "body"
schema:
$ref: "#/definitions/ConfigSpec"
description: |
The spec of the config to update. Currently, only the Labels field
can be updated. All other fields must remain unchanged from the
[ConfigInspect endpoint](#operation/ConfigInspect) response values.
- name: "version"
in: "query"
description: |
The version number of the config object being updated. This is
required to avoid conflicting writes.
type: "integer"
format: "int64"
required: true
tags: ["Config"]
/distribution/{name}/json:
get:
summary: "Get image information from the registry"
description: |
Return image digest and platform information by contacting the registry.
operationId: "DistributionInspect"
produces:
- "application/json"
responses:
200:
description: "descriptor and platform information"
schema:
$ref: "#/definitions/DistributionInspect"
401:
description: "Failed authentication or no image found"
schema:
$ref: "#/definitions/ErrorResponse"
examples:
application/json:
message: "No such image: someimage (tag: latest)"
500:
description: "Server error"
schema:
$ref: "#/definitions/ErrorResponse"
parameters:
- name: "name"
in: "path"
description: "Image name or id"
type: "string"
required: true
tags: ["Distribution"]
/session:
post:
summary: "Initialize interactive session"
description: |
Start a new interactive session with a server. Session allows server to
call back to the client for advanced capabilities.
### Hijacking
This endpoint hijacks the HTTP connection to HTTP2 transport that allows
the client to expose gPRC services on that connection.
For example, the client sends this request to upgrade the connection:
```
POST /session HTTP/1.1
Upgrade: h2c
Connection: Upgrade
```
The Docker daemon responds with a `101 UPGRADED` response follow with
the raw stream:
```
HTTP/1.1 101 UPGRADED
Connection: Upgrade
Upgrade: h2c
```
operationId: "Session"
produces:
- "application/vnd.docker.raw-stream"
responses:
101:
description: "no error, hijacking successful"
400:
description: "bad parameter"
schema:
$ref: "#/definitions/ErrorResponse"
500:
description: "server error"
schema:
$ref: "#/definitions/ErrorResponse"
tags: ["Session"]
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | Slightly on the fence if it would look more like "programmatically parseable values" if we'd use hyphens instead of spaces; _technically_ it makes no difference of course, but it somewhat feels more "ok"; WDYT? Or are these part of some spec?
```suggestion
- "pending-publish"
- "published"
- "pending-node-unpublish"
- "pending-controller-unpublish"
```
| thaJeztah | 5,005 |
moby/moby | 41,982 | Add Swarm Cluster Volume support | This is a preliminary, draft pull request for Swarm Cluster Volume Support. Though it is a long way off from being ready for merging, because of the size and scope of it, it is best to start review now.
This is more-or-less an implementation of the proposal in #39624.
Please give special attention to the API changes. I welcome any alternative suggestions for how to structure the API.
Closes #31923
Closes #39624 | null | 2021-02-04 18:06:01+00:00 | 2022-05-13 00:30:45+00:00 | daemon/cluster/convert/task.go | package convert // import "github.com/docker/docker/daemon/cluster/convert"
import (
"strings"
types "github.com/docker/docker/api/types/swarm"
gogotypes "github.com/gogo/protobuf/types"
swarmapi "github.com/moby/swarmkit/v2/api"
)
// TaskFromGRPC converts a grpc Task to a Task.
func TaskFromGRPC(t swarmapi.Task) (types.Task, error) {
containerStatus := t.Status.GetContainer()
taskSpec, err := taskSpecFromGRPC(t.Spec)
if err != nil {
return types.Task{}, err
}
task := types.Task{
ID: t.ID,
Annotations: annotationsFromGRPC(t.Annotations),
ServiceID: t.ServiceID,
Slot: int(t.Slot),
NodeID: t.NodeID,
Spec: taskSpec,
Status: types.TaskStatus{
State: types.TaskState(strings.ToLower(t.Status.State.String())),
Message: t.Status.Message,
Err: t.Status.Err,
},
DesiredState: types.TaskState(strings.ToLower(t.DesiredState.String())),
GenericResources: GenericResourcesFromGRPC(t.AssignedGenericResources),
}
// Meta
task.Version.Index = t.Meta.Version.Index
task.CreatedAt, _ = gogotypes.TimestampFromProto(t.Meta.CreatedAt)
task.UpdatedAt, _ = gogotypes.TimestampFromProto(t.Meta.UpdatedAt)
task.Status.Timestamp, _ = gogotypes.TimestampFromProto(t.Status.Timestamp)
if containerStatus != nil {
task.Status.ContainerStatus = &types.ContainerStatus{
ContainerID: containerStatus.ContainerID,
PID: int(containerStatus.PID),
ExitCode: int(containerStatus.ExitCode),
}
}
// NetworksAttachments
for _, na := range t.Networks {
task.NetworksAttachments = append(task.NetworksAttachments, networkAttachmentFromGRPC(na))
}
if t.JobIteration != nil {
task.JobIteration = &types.Version{
Index: t.JobIteration.Index,
}
}
if t.Status.PortStatus == nil {
return task, nil
}
for _, p := range t.Status.PortStatus.Ports {
task.Status.PortStatus.Ports = append(task.Status.PortStatus.Ports, types.PortConfig{
Name: p.Name,
Protocol: types.PortConfigProtocol(strings.ToLower(swarmapi.PortConfig_Protocol_name[int32(p.Protocol)])),
PublishMode: types.PortConfigPublishMode(strings.ToLower(swarmapi.PortConfig_PublishMode_name[int32(p.PublishMode)])),
TargetPort: p.TargetPort,
PublishedPort: p.PublishedPort,
})
}
return task, nil
}
| package convert // import "github.com/docker/docker/daemon/cluster/convert"
import (
"strings"
types "github.com/docker/docker/api/types/swarm"
gogotypes "github.com/gogo/protobuf/types"
swarmapi "github.com/moby/swarmkit/v2/api"
)
// TaskFromGRPC converts a grpc Task to a Task.
func TaskFromGRPC(t swarmapi.Task) (types.Task, error) {
containerStatus := t.Status.GetContainer()
taskSpec, err := taskSpecFromGRPC(t.Spec)
if err != nil {
return types.Task{}, err
}
task := types.Task{
ID: t.ID,
Annotations: annotationsFromGRPC(t.Annotations),
ServiceID: t.ServiceID,
Slot: int(t.Slot),
NodeID: t.NodeID,
Spec: taskSpec,
Status: types.TaskStatus{
State: types.TaskState(strings.ToLower(t.Status.State.String())),
Message: t.Status.Message,
Err: t.Status.Err,
},
DesiredState: types.TaskState(strings.ToLower(t.DesiredState.String())),
GenericResources: GenericResourcesFromGRPC(t.AssignedGenericResources),
}
// Meta
task.Version.Index = t.Meta.Version.Index
task.CreatedAt, _ = gogotypes.TimestampFromProto(t.Meta.CreatedAt)
task.UpdatedAt, _ = gogotypes.TimestampFromProto(t.Meta.UpdatedAt)
task.Status.Timestamp, _ = gogotypes.TimestampFromProto(t.Status.Timestamp)
if containerStatus != nil {
task.Status.ContainerStatus = &types.ContainerStatus{
ContainerID: containerStatus.ContainerID,
PID: int(containerStatus.PID),
ExitCode: int(containerStatus.ExitCode),
}
}
// NetworksAttachments
for _, na := range t.Networks {
task.NetworksAttachments = append(task.NetworksAttachments, networkAttachmentFromGRPC(na))
}
if t.JobIteration != nil {
task.JobIteration = &types.Version{
Index: t.JobIteration.Index,
}
}
// appending to a nil slice is valid. if there are no items in t.Volumes,
// then the task.Volumes will remain nil; otherwise, it will contain
// converted entries.
for _, v := range t.Volumes {
task.Volumes = append(task.Volumes, types.VolumeAttachment{
ID: v.ID,
Source: v.Source,
Target: v.Target,
})
}
if t.Status.PortStatus == nil {
return task, nil
}
for _, p := range t.Status.PortStatus.Ports {
task.Status.PortStatus.Ports = append(task.Status.PortStatus.Ports, types.PortConfig{
Name: p.Name,
Protocol: types.PortConfigProtocol(strings.ToLower(swarmapi.PortConfig_Protocol_name[int32(p.Protocol)])),
PublishMode: types.PortConfigPublishMode(strings.ToLower(swarmapi.PortConfig_PublishMode_name[int32(p.PublishMode)])),
TargetPort: p.TargetPort,
PublishedPort: p.PublishedPort,
})
}
return task, nil
}
| dperny | 3fb59282337a282d31aa11c9e273e3349c16a709 | d35731fa15ed8ea96d4f3b6f5358d9385b1b7a46 | As these types are basically equivalent, wondering if this could even be
```suggestion
task.Volumes = append(task.Volumes, types.VolumeAttachment(*v))
```
🤔 | thaJeztah | 5,006 |
moby/moby | 41,955 | Fallback to manifest list when no platform match | relates to / addresses https://github.com/docker/for-linux/issues/1170#issuecomment-750478242
In some cases, in fact many in the wild, an image may have the incorrect
platform on the image config.
This can lead to failures to run an image, particularly when a user
specifies a `--platform`.
Typically what we see in the wild is a manifest list with an an entry
for, as an example, linux/arm64 pointing to an image config that has
linux/amd64 on it.
This change falls back to looking up the manifest list for an image to
see if the manifest list shows the image as the correct one for that
platform.
In order to accomplish this we need to traverse the leases associated
with an image. Each image, if pulled with Docker 20.10, will have the
manifest list stored in the containerd content store with the resource
assigned to a lease keyed on the image ID.
So we look up the lease for the image, then look up the assocated
resources to find the manifest list, then check the manifest list for a
platform match, then ensure that manifest referes to our image config.
This is only used as a fallback when a user specified they want a
particular platform and the image config that we have does not match
that platform. | null | 2021-02-01 19:17:35+00:00 | 2021-02-18 19:59:52+00:00 | daemon/images/image.go | package images // import "github.com/docker/docker/daemon/images"
import (
"fmt"
"github.com/containerd/containerd/platforms"
"github.com/pkg/errors"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
specs "github.com/opencontainers/image-spec/specs-go/v1"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if !platforms.Only(p).Match(imgPlat) {
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
return
}
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"github.com/containerd/containerd/content"
c8derrdefs "github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
type manifestList struct {
Manifests []specs.Descriptor `json:"manifests"`
}
type manifest struct {
Config specs.Descriptor `json:"config"`
}
func (i *ImageService) manifestMatchesPlatform(img *image.Image, platform specs.Platform) bool {
ctx := context.TODO()
logger := logrus.WithField("image", img.ID).WithField("desiredPlatform", platforms.Format(platform))
ls, leaseErr := i.leases.ListResources(context.TODO(), leases.Lease{ID: imageKey(img.ID().Digest())})
if leaseErr != nil {
logger.WithError(leaseErr).Error("Error looking up image leases")
return false
}
// Note we are comparing against manifest lists here, which we expect to always have a CPU variant set (where applicable).
// So there is no need for the fallback matcher here.
comparer := platforms.Only(platform)
var (
ml manifestList
m manifest
)
makeRdr := func(ra content.ReaderAt) io.Reader {
return io.LimitReader(io.NewSectionReader(ra, 0, ra.Size()), 1e6)
}
for _, r := range ls {
logger := logger.WithField("resourceID", r.ID).WithField("resourceType", r.Type)
logger.Debug("Checking lease resource for platform match")
if r.Type != "content" {
continue
}
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: digest.Digest(r.ID)})
if err != nil {
if c8derrdefs.IsNotFound(err) {
continue
}
logger.WithError(err).Error("Error looking up referenced manifest list for image")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest list for image")
continue
}
ml.Manifests = nil
if err := json.Unmarshal(data, &ml); err != nil {
logger.WithError(err).Error("Error unmarshalling content")
continue
}
for _, md := range ml.Manifests {
switch md.MediaType {
case specs.MediaTypeImageManifest, images.MediaTypeDockerSchema2Manifest:
default:
continue
}
p := specs.Platform{
Architecture: md.Platform.Architecture,
OS: md.Platform.OS,
Variant: md.Platform.Variant,
}
if !comparer.Match(p) {
logger.WithField("otherPlatform", platforms.Format(p)).Debug("Manifest is not a match")
continue
}
// Here we have a platform match for the referenced manifest, let's make sure the manifest is actually for the image config we are using.
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: md.Digest})
if err != nil {
logger.WithField("otherDigest", md.Digest).WithError(err).Error("Could not get reader for manifest")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest for image")
continue
}
if err := json.Unmarshal(data, &m); err != nil {
logger.WithError(err).Error("Error desserializing manifest")
continue
}
if m.Config.Digest == img.ID().Digest() {
logger.WithField("manifestDigest", md.Digest).Debug("Found matching manifest for image")
return true
}
logger.WithField("otherDigest", md.Digest).Debug("Skipping non-matching manifest")
}
}
return false
}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if OnlyPlatformWithFallback(p).Match(imgPlat) {
return
}
// In some cases the image config can actually be wrong (e.g. classic `docker build` may not handle `--platform` correctly)
// So we'll look up the manifest list that coresponds to this imaage to check if at least the manifest list says it is the correct image.
if i.manifestMatchesPlatform(retImg, p) {
return
}
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
// OnlyPlatformWithFallback uses `platforms.Only` with a fallback to handle the case where the platform
// being matched does not have a CPU variant.
//
// The reason for this is that CPU variant is not even if the official image config spec as of this writing.
// See: https://github.com/opencontainers/image-spec/pull/809
// Since Docker tends to compare platforms from the image config, we need to handle this case.
func OnlyPlatformWithFallback(p specs.Platform) platforms.Matcher {
return &onlyFallbackMatcher{only: platforms.Only(p), p: platforms.Normalize(p)}
}
type onlyFallbackMatcher struct {
only platforms.Matcher
p specs.Platform
}
func (m *onlyFallbackMatcher) Match(other specs.Platform) bool {
if m.only.Match(other) {
// It matches, no reason to fallback
return true
}
if other.Variant != "" {
// If there is a variant then this fallback does not apply, and there is no match
return false
}
otherN := platforms.Normalize(other)
otherN.Variant = "" // normalization adds a default variant... which is the whole problem with `platforms.Only`
return m.p.OS == otherN.OS &&
m.p.Architecture == otherN.Architecture
}
| cpuguy83 | e88af3624b24827896968ea822450496d8a67fb5 | 56ffa614d66cda4cc154661598cd3c687e8020ab | ```suggestion
logger.WithError(err).Error("Error reading manifest list for image")
``` | tianon | 5,007 |
moby/moby | 41,955 | Fallback to manifest list when no platform match | relates to / addresses https://github.com/docker/for-linux/issues/1170#issuecomment-750478242
In some cases, in fact many in the wild, an image may have the incorrect
platform on the image config.
This can lead to failures to run an image, particularly when a user
specifies a `--platform`.
Typically what we see in the wild is a manifest list with an an entry
for, as an example, linux/arm64 pointing to an image config that has
linux/amd64 on it.
This change falls back to looking up the manifest list for an image to
see if the manifest list shows the image as the correct one for that
platform.
In order to accomplish this we need to traverse the leases associated
with an image. Each image, if pulled with Docker 20.10, will have the
manifest list stored in the containerd content store with the resource
assigned to a lease keyed on the image ID.
So we look up the lease for the image, then look up the assocated
resources to find the manifest list, then check the manifest list for a
platform match, then ensure that manifest referes to our image config.
This is only used as a fallback when a user specified they want a
particular platform and the image config that we have does not match
that platform. | null | 2021-02-01 19:17:35+00:00 | 2021-02-18 19:59:52+00:00 | daemon/images/image.go | package images // import "github.com/docker/docker/daemon/images"
import (
"fmt"
"github.com/containerd/containerd/platforms"
"github.com/pkg/errors"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
specs "github.com/opencontainers/image-spec/specs-go/v1"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if !platforms.Only(p).Match(imgPlat) {
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
return
}
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"github.com/containerd/containerd/content"
c8derrdefs "github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
type manifestList struct {
Manifests []specs.Descriptor `json:"manifests"`
}
type manifest struct {
Config specs.Descriptor `json:"config"`
}
func (i *ImageService) manifestMatchesPlatform(img *image.Image, platform specs.Platform) bool {
ctx := context.TODO()
logger := logrus.WithField("image", img.ID).WithField("desiredPlatform", platforms.Format(platform))
ls, leaseErr := i.leases.ListResources(context.TODO(), leases.Lease{ID: imageKey(img.ID().Digest())})
if leaseErr != nil {
logger.WithError(leaseErr).Error("Error looking up image leases")
return false
}
// Note we are comparing against manifest lists here, which we expect to always have a CPU variant set (where applicable).
// So there is no need for the fallback matcher here.
comparer := platforms.Only(platform)
var (
ml manifestList
m manifest
)
makeRdr := func(ra content.ReaderAt) io.Reader {
return io.LimitReader(io.NewSectionReader(ra, 0, ra.Size()), 1e6)
}
for _, r := range ls {
logger := logger.WithField("resourceID", r.ID).WithField("resourceType", r.Type)
logger.Debug("Checking lease resource for platform match")
if r.Type != "content" {
continue
}
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: digest.Digest(r.ID)})
if err != nil {
if c8derrdefs.IsNotFound(err) {
continue
}
logger.WithError(err).Error("Error looking up referenced manifest list for image")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest list for image")
continue
}
ml.Manifests = nil
if err := json.Unmarshal(data, &ml); err != nil {
logger.WithError(err).Error("Error unmarshalling content")
continue
}
for _, md := range ml.Manifests {
switch md.MediaType {
case specs.MediaTypeImageManifest, images.MediaTypeDockerSchema2Manifest:
default:
continue
}
p := specs.Platform{
Architecture: md.Platform.Architecture,
OS: md.Platform.OS,
Variant: md.Platform.Variant,
}
if !comparer.Match(p) {
logger.WithField("otherPlatform", platforms.Format(p)).Debug("Manifest is not a match")
continue
}
// Here we have a platform match for the referenced manifest, let's make sure the manifest is actually for the image config we are using.
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: md.Digest})
if err != nil {
logger.WithField("otherDigest", md.Digest).WithError(err).Error("Could not get reader for manifest")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest for image")
continue
}
if err := json.Unmarshal(data, &m); err != nil {
logger.WithError(err).Error("Error desserializing manifest")
continue
}
if m.Config.Digest == img.ID().Digest() {
logger.WithField("manifestDigest", md.Digest).Debug("Found matching manifest for image")
return true
}
logger.WithField("otherDigest", md.Digest).Debug("Skipping non-matching manifest")
}
}
return false
}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if OnlyPlatformWithFallback(p).Match(imgPlat) {
return
}
// In some cases the image config can actually be wrong (e.g. classic `docker build` may not handle `--platform` correctly)
// So we'll look up the manifest list that coresponds to this imaage to check if at least the manifest list says it is the correct image.
if i.manifestMatchesPlatform(retImg, p) {
return
}
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
// OnlyPlatformWithFallback uses `platforms.Only` with a fallback to handle the case where the platform
// being matched does not have a CPU variant.
//
// The reason for this is that CPU variant is not even if the official image config spec as of this writing.
// See: https://github.com/opencontainers/image-spec/pull/809
// Since Docker tends to compare platforms from the image config, we need to handle this case.
func OnlyPlatformWithFallback(p specs.Platform) platforms.Matcher {
return &onlyFallbackMatcher{only: platforms.Only(p), p: platforms.Normalize(p)}
}
type onlyFallbackMatcher struct {
only platforms.Matcher
p specs.Platform
}
func (m *onlyFallbackMatcher) Match(other specs.Platform) bool {
if m.only.Match(other) {
// It matches, no reason to fallback
return true
}
if other.Variant != "" {
// If there is a variant then this fallback does not apply, and there is no match
return false
}
otherN := platforms.Normalize(other)
otherN.Variant = "" // normalization adds a default variant... which is the whole problem with `platforms.Only`
return m.p.OS == otherN.OS &&
m.p.Architecture == otherN.Architecture
}
| cpuguy83 | e88af3624b24827896968ea822450496d8a67fb5 | 56ffa614d66cda4cc154661598cd3c687e8020ab | Just to note it somewhere - this is due to a quirk in containerd's platform matching where `platforms.Normalize` is invoked on both the argument to `platforms.Only` _and_ the things it's being compared against, so `linux/arm` gets normalized to `linux/arm/v7` in both cases (and thus fails if you specify `--platform linux/arm/v6` on a single-arch, no-manifest-list image that only has `os` and `architecture`).
Ideally, we'd fix `platforms.Only` in containerd to handle this case better, but it's complicated. :sweat_smile: | tianon | 5,008 |
moby/moby | 41,955 | Fallback to manifest list when no platform match | relates to / addresses https://github.com/docker/for-linux/issues/1170#issuecomment-750478242
In some cases, in fact many in the wild, an image may have the incorrect
platform on the image config.
This can lead to failures to run an image, particularly when a user
specifies a `--platform`.
Typically what we see in the wild is a manifest list with an an entry
for, as an example, linux/arm64 pointing to an image config that has
linux/amd64 on it.
This change falls back to looking up the manifest list for an image to
see if the manifest list shows the image as the correct one for that
platform.
In order to accomplish this we need to traverse the leases associated
with an image. Each image, if pulled with Docker 20.10, will have the
manifest list stored in the containerd content store with the resource
assigned to a lease keyed on the image ID.
So we look up the lease for the image, then look up the assocated
resources to find the manifest list, then check the manifest list for a
platform match, then ensure that manifest referes to our image config.
This is only used as a fallback when a user specified they want a
particular platform and the image config that we have does not match
that platform. | null | 2021-02-01 19:17:35+00:00 | 2021-02-18 19:59:52+00:00 | daemon/images/image.go | package images // import "github.com/docker/docker/daemon/images"
import (
"fmt"
"github.com/containerd/containerd/platforms"
"github.com/pkg/errors"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
specs "github.com/opencontainers/image-spec/specs-go/v1"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if !platforms.Only(p).Match(imgPlat) {
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
return
}
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"github.com/containerd/containerd/content"
c8derrdefs "github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
type manifestList struct {
Manifests []specs.Descriptor `json:"manifests"`
}
type manifest struct {
Config specs.Descriptor `json:"config"`
}
func (i *ImageService) manifestMatchesPlatform(img *image.Image, platform specs.Platform) bool {
ctx := context.TODO()
logger := logrus.WithField("image", img.ID).WithField("desiredPlatform", platforms.Format(platform))
ls, leaseErr := i.leases.ListResources(context.TODO(), leases.Lease{ID: imageKey(img.ID().Digest())})
if leaseErr != nil {
logger.WithError(leaseErr).Error("Error looking up image leases")
return false
}
// Note we are comparing against manifest lists here, which we expect to always have a CPU variant set (where applicable).
// So there is no need for the fallback matcher here.
comparer := platforms.Only(platform)
var (
ml manifestList
m manifest
)
makeRdr := func(ra content.ReaderAt) io.Reader {
return io.LimitReader(io.NewSectionReader(ra, 0, ra.Size()), 1e6)
}
for _, r := range ls {
logger := logger.WithField("resourceID", r.ID).WithField("resourceType", r.Type)
logger.Debug("Checking lease resource for platform match")
if r.Type != "content" {
continue
}
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: digest.Digest(r.ID)})
if err != nil {
if c8derrdefs.IsNotFound(err) {
continue
}
logger.WithError(err).Error("Error looking up referenced manifest list for image")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest list for image")
continue
}
ml.Manifests = nil
if err := json.Unmarshal(data, &ml); err != nil {
logger.WithError(err).Error("Error unmarshalling content")
continue
}
for _, md := range ml.Manifests {
switch md.MediaType {
case specs.MediaTypeImageManifest, images.MediaTypeDockerSchema2Manifest:
default:
continue
}
p := specs.Platform{
Architecture: md.Platform.Architecture,
OS: md.Platform.OS,
Variant: md.Platform.Variant,
}
if !comparer.Match(p) {
logger.WithField("otherPlatform", platforms.Format(p)).Debug("Manifest is not a match")
continue
}
// Here we have a platform match for the referenced manifest, let's make sure the manifest is actually for the image config we are using.
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: md.Digest})
if err != nil {
logger.WithField("otherDigest", md.Digest).WithError(err).Error("Could not get reader for manifest")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest for image")
continue
}
if err := json.Unmarshal(data, &m); err != nil {
logger.WithError(err).Error("Error desserializing manifest")
continue
}
if m.Config.Digest == img.ID().Digest() {
logger.WithField("manifestDigest", md.Digest).Debug("Found matching manifest for image")
return true
}
logger.WithField("otherDigest", md.Digest).Debug("Skipping non-matching manifest")
}
}
return false
}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if OnlyPlatformWithFallback(p).Match(imgPlat) {
return
}
// In some cases the image config can actually be wrong (e.g. classic `docker build` may not handle `--platform` correctly)
// So we'll look up the manifest list that coresponds to this imaage to check if at least the manifest list says it is the correct image.
if i.manifestMatchesPlatform(retImg, p) {
return
}
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
// OnlyPlatformWithFallback uses `platforms.Only` with a fallback to handle the case where the platform
// being matched does not have a CPU variant.
//
// The reason for this is that CPU variant is not even if the official image config spec as of this writing.
// See: https://github.com/opencontainers/image-spec/pull/809
// Since Docker tends to compare platforms from the image config, we need to handle this case.
func OnlyPlatformWithFallback(p specs.Platform) platforms.Matcher {
return &onlyFallbackMatcher{only: platforms.Only(p), p: platforms.Normalize(p)}
}
type onlyFallbackMatcher struct {
only platforms.Matcher
p specs.Platform
}
func (m *onlyFallbackMatcher) Match(other specs.Platform) bool {
if m.only.Match(other) {
// It matches, no reason to fallback
return true
}
if other.Variant != "" {
// If there is a variant then this fallback does not apply, and there is no match
return false
}
otherN := platforms.Normalize(other)
otherN.Variant = "" // normalization adds a default variant... which is the whole problem with `platforms.Only`
return m.p.OS == otherN.OS &&
m.p.Architecture == otherN.Architecture
}
| cpuguy83 | e88af3624b24827896968ea822450496d8a67fb5 | 56ffa614d66cda4cc154661598cd3c687e8020ab | ```suggestion
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
```
| thaJeztah | 5,009 |
moby/moby | 41,955 | Fallback to manifest list when no platform match | relates to / addresses https://github.com/docker/for-linux/issues/1170#issuecomment-750478242
In some cases, in fact many in the wild, an image may have the incorrect
platform on the image config.
This can lead to failures to run an image, particularly when a user
specifies a `--platform`.
Typically what we see in the wild is a manifest list with an an entry
for, as an example, linux/arm64 pointing to an image config that has
linux/amd64 on it.
This change falls back to looking up the manifest list for an image to
see if the manifest list shows the image as the correct one for that
platform.
In order to accomplish this we need to traverse the leases associated
with an image. Each image, if pulled with Docker 20.10, will have the
manifest list stored in the containerd content store with the resource
assigned to a lease keyed on the image ID.
So we look up the lease for the image, then look up the assocated
resources to find the manifest list, then check the manifest list for a
platform match, then ensure that manifest referes to our image config.
This is only used as a fallback when a user specified they want a
particular platform and the image config that we have does not match
that platform. | null | 2021-02-01 19:17:35+00:00 | 2021-02-18 19:59:52+00:00 | daemon/images/image.go | package images // import "github.com/docker/docker/daemon/images"
import (
"fmt"
"github.com/containerd/containerd/platforms"
"github.com/pkg/errors"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
specs "github.com/opencontainers/image-spec/specs-go/v1"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if !platforms.Only(p).Match(imgPlat) {
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
return
}
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"github.com/containerd/containerd/content"
c8derrdefs "github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
type manifestList struct {
Manifests []specs.Descriptor `json:"manifests"`
}
type manifest struct {
Config specs.Descriptor `json:"config"`
}
func (i *ImageService) manifestMatchesPlatform(img *image.Image, platform specs.Platform) bool {
ctx := context.TODO()
logger := logrus.WithField("image", img.ID).WithField("desiredPlatform", platforms.Format(platform))
ls, leaseErr := i.leases.ListResources(context.TODO(), leases.Lease{ID: imageKey(img.ID().Digest())})
if leaseErr != nil {
logger.WithError(leaseErr).Error("Error looking up image leases")
return false
}
// Note we are comparing against manifest lists here, which we expect to always have a CPU variant set (where applicable).
// So there is no need for the fallback matcher here.
comparer := platforms.Only(platform)
var (
ml manifestList
m manifest
)
makeRdr := func(ra content.ReaderAt) io.Reader {
return io.LimitReader(io.NewSectionReader(ra, 0, ra.Size()), 1e6)
}
for _, r := range ls {
logger := logger.WithField("resourceID", r.ID).WithField("resourceType", r.Type)
logger.Debug("Checking lease resource for platform match")
if r.Type != "content" {
continue
}
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: digest.Digest(r.ID)})
if err != nil {
if c8derrdefs.IsNotFound(err) {
continue
}
logger.WithError(err).Error("Error looking up referenced manifest list for image")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest list for image")
continue
}
ml.Manifests = nil
if err := json.Unmarshal(data, &ml); err != nil {
logger.WithError(err).Error("Error unmarshalling content")
continue
}
for _, md := range ml.Manifests {
switch md.MediaType {
case specs.MediaTypeImageManifest, images.MediaTypeDockerSchema2Manifest:
default:
continue
}
p := specs.Platform{
Architecture: md.Platform.Architecture,
OS: md.Platform.OS,
Variant: md.Platform.Variant,
}
if !comparer.Match(p) {
logger.WithField("otherPlatform", platforms.Format(p)).Debug("Manifest is not a match")
continue
}
// Here we have a platform match for the referenced manifest, let's make sure the manifest is actually for the image config we are using.
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: md.Digest})
if err != nil {
logger.WithField("otherDigest", md.Digest).WithError(err).Error("Could not get reader for manifest")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest for image")
continue
}
if err := json.Unmarshal(data, &m); err != nil {
logger.WithError(err).Error("Error desserializing manifest")
continue
}
if m.Config.Digest == img.ID().Digest() {
logger.WithField("manifestDigest", md.Digest).Debug("Found matching manifest for image")
return true
}
logger.WithField("otherDigest", md.Digest).Debug("Skipping non-matching manifest")
}
}
return false
}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if OnlyPlatformWithFallback(p).Match(imgPlat) {
return
}
// In some cases the image config can actually be wrong (e.g. classic `docker build` may not handle `--platform` correctly)
// So we'll look up the manifest list that coresponds to this imaage to check if at least the manifest list says it is the correct image.
if i.manifestMatchesPlatform(retImg, p) {
return
}
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
// OnlyPlatformWithFallback uses `platforms.Only` with a fallback to handle the case where the platform
// being matched does not have a CPU variant.
//
// The reason for this is that CPU variant is not even if the official image config spec as of this writing.
// See: https://github.com/opencontainers/image-spec/pull/809
// Since Docker tends to compare platforms from the image config, we need to handle this case.
func OnlyPlatformWithFallback(p specs.Platform) platforms.Matcher {
return &onlyFallbackMatcher{only: platforms.Only(p), p: platforms.Normalize(p)}
}
type onlyFallbackMatcher struct {
only platforms.Matcher
p specs.Platform
}
func (m *onlyFallbackMatcher) Match(other specs.Platform) bool {
if m.only.Match(other) {
// It matches, no reason to fallback
return true
}
if other.Variant != "" {
// If there is a variant then this fallback does not apply, and there is no match
return false
}
otherN := platforms.Normalize(other)
otherN.Variant = "" // normalization adds a default variant... which is the whole problem with `platforms.Only`
return m.p.OS == otherN.OS &&
m.p.Architecture == otherN.Architecture
}
| cpuguy83 | e88af3624b24827896968ea822450496d8a67fb5 | 56ffa614d66cda4cc154661598cd3c687e8020ab | (edited; noticed this was in the `defer`, so no error to return) | thaJeztah | 5,010 |
moby/moby | 41,955 | Fallback to manifest list when no platform match | relates to / addresses https://github.com/docker/for-linux/issues/1170#issuecomment-750478242
In some cases, in fact many in the wild, an image may have the incorrect
platform on the image config.
This can lead to failures to run an image, particularly when a user
specifies a `--platform`.
Typically what we see in the wild is a manifest list with an an entry
for, as an example, linux/arm64 pointing to an image config that has
linux/amd64 on it.
This change falls back to looking up the manifest list for an image to
see if the manifest list shows the image as the correct one for that
platform.
In order to accomplish this we need to traverse the leases associated
with an image. Each image, if pulled with Docker 20.10, will have the
manifest list stored in the containerd content store with the resource
assigned to a lease keyed on the image ID.
So we look up the lease for the image, then look up the assocated
resources to find the manifest list, then check the manifest list for a
platform match, then ensure that manifest referes to our image config.
This is only used as a fallback when a user specified they want a
particular platform and the image config that we have does not match
that platform. | null | 2021-02-01 19:17:35+00:00 | 2021-02-18 19:59:52+00:00 | daemon/images/image.go | package images // import "github.com/docker/docker/daemon/images"
import (
"fmt"
"github.com/containerd/containerd/platforms"
"github.com/pkg/errors"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
specs "github.com/opencontainers/image-spec/specs-go/v1"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if !platforms.Only(p).Match(imgPlat) {
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
return
}
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"github.com/containerd/containerd/content"
c8derrdefs "github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// ErrImageDoesNotExist is error returned when no image can be found for a reference.
type ErrImageDoesNotExist struct {
ref reference.Reference
}
func (e ErrImageDoesNotExist) Error() string {
ref := e.ref
if named, ok := ref.(reference.Named); ok {
ref = reference.TagNameOnly(named)
}
return fmt.Sprintf("No such image: %s", reference.FamiliarString(ref))
}
// NotFound implements the NotFound interface
func (e ErrImageDoesNotExist) NotFound() {}
type manifestList struct {
Manifests []specs.Descriptor `json:"manifests"`
}
type manifest struct {
Config specs.Descriptor `json:"config"`
}
func (i *ImageService) manifestMatchesPlatform(img *image.Image, platform specs.Platform) bool {
ctx := context.TODO()
logger := logrus.WithField("image", img.ID).WithField("desiredPlatform", platforms.Format(platform))
ls, leaseErr := i.leases.ListResources(context.TODO(), leases.Lease{ID: imageKey(img.ID().Digest())})
if leaseErr != nil {
logger.WithError(leaseErr).Error("Error looking up image leases")
return false
}
// Note we are comparing against manifest lists here, which we expect to always have a CPU variant set (where applicable).
// So there is no need for the fallback matcher here.
comparer := platforms.Only(platform)
var (
ml manifestList
m manifest
)
makeRdr := func(ra content.ReaderAt) io.Reader {
return io.LimitReader(io.NewSectionReader(ra, 0, ra.Size()), 1e6)
}
for _, r := range ls {
logger := logger.WithField("resourceID", r.ID).WithField("resourceType", r.Type)
logger.Debug("Checking lease resource for platform match")
if r.Type != "content" {
continue
}
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: digest.Digest(r.ID)})
if err != nil {
if c8derrdefs.IsNotFound(err) {
continue
}
logger.WithError(err).Error("Error looking up referenced manifest list for image")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest list for image")
continue
}
ml.Manifests = nil
if err := json.Unmarshal(data, &ml); err != nil {
logger.WithError(err).Error("Error unmarshalling content")
continue
}
for _, md := range ml.Manifests {
switch md.MediaType {
case specs.MediaTypeImageManifest, images.MediaTypeDockerSchema2Manifest:
default:
continue
}
p := specs.Platform{
Architecture: md.Platform.Architecture,
OS: md.Platform.OS,
Variant: md.Platform.Variant,
}
if !comparer.Match(p) {
logger.WithField("otherPlatform", platforms.Format(p)).Debug("Manifest is not a match")
continue
}
// Here we have a platform match for the referenced manifest, let's make sure the manifest is actually for the image config we are using.
ra, err := i.content.ReaderAt(ctx, specs.Descriptor{Digest: md.Digest})
if err != nil {
logger.WithField("otherDigest", md.Digest).WithError(err).Error("Could not get reader for manifest")
continue
}
data, err := ioutil.ReadAll(makeRdr(ra))
ra.Close()
if err != nil {
logger.WithError(err).Error("Error reading manifest for image")
continue
}
if err := json.Unmarshal(data, &m); err != nil {
logger.WithError(err).Error("Error desserializing manifest")
continue
}
if m.Config.Digest == img.ID().Digest() {
logger.WithField("manifestDigest", md.Digest).Debug("Found matching manifest for image")
return true
}
logger.WithField("otherDigest", md.Digest).Debug("Skipping non-matching manifest")
}
}
return false
}
// GetImage returns an image corresponding to the image referred to by refOrID.
func (i *ImageService) GetImage(refOrID string, platform *specs.Platform) (retImg *image.Image, retErr error) {
defer func() {
if retErr != nil || retImg == nil || platform == nil {
return
}
imgPlat := specs.Platform{
OS: retImg.OS,
Architecture: retImg.Architecture,
Variant: retImg.Variant,
}
p := *platform
// Note that `platforms.Only` will fuzzy match this for us
// For example: an armv6 image will run just fine an an armv7 CPU, without emulation or anything.
if OnlyPlatformWithFallback(p).Match(imgPlat) {
return
}
// In some cases the image config can actually be wrong (e.g. classic `docker build` may not handle `--platform` correctly)
// So we'll look up the manifest list that coresponds to this imaage to check if at least the manifest list says it is the correct image.
if i.manifestMatchesPlatform(retImg, p) {
return
}
// This allows us to tell clients that we don't have the image they asked for
// Where this gets hairy is the image store does not currently support multi-arch images, e.g.:
// An image `foo` may have a multi-arch manifest, but the image store only fetches the image for a specific platform
// The image store does not store the manifest list and image tags are assigned to architecture specific images.
// So we can have a `foo` image that is amd64 but the user requested armv7. If the user looks at the list of images.
// This may be confusing.
// The alternative to this is to return a errdefs.Conflict error with a helpful message, but clients will not be
// able to automatically tell what causes the conflict.
retErr = errdefs.NotFound(errors.Errorf("image with reference %s was found but does not match the specified platform: wanted %s, actual: %s", refOrID, platforms.Format(p), platforms.Format(imgPlat)))
}()
ref, err := reference.ParseAnyReference(refOrID)
if err != nil {
return nil, errdefs.InvalidParameter(err)
}
namedRef, ok := ref.(reference.Named)
if !ok {
digested, ok := ref.(reference.Digested)
if !ok {
return nil, ErrImageDoesNotExist{ref}
}
id := image.IDFromDigest(digested.Digest())
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
if digest, err := i.referenceStore.Get(namedRef); err == nil {
// Search the image stores to get the operating system, defaulting to host OS.
id := image.IDFromDigest(digest)
if img, err := i.imageStore.Get(id); err == nil {
return img, nil
}
}
// Search based on ID
if id, err := i.imageStore.Search(refOrID); err == nil {
img, err := i.imageStore.Get(id)
if err != nil {
return nil, ErrImageDoesNotExist{ref}
}
return img, nil
}
return nil, ErrImageDoesNotExist{ref}
}
// OnlyPlatformWithFallback uses `platforms.Only` with a fallback to handle the case where the platform
// being matched does not have a CPU variant.
//
// The reason for this is that CPU variant is not even if the official image config spec as of this writing.
// See: https://github.com/opencontainers/image-spec/pull/809
// Since Docker tends to compare platforms from the image config, we need to handle this case.
func OnlyPlatformWithFallback(p specs.Platform) platforms.Matcher {
return &onlyFallbackMatcher{only: platforms.Only(p), p: platforms.Normalize(p)}
}
type onlyFallbackMatcher struct {
only platforms.Matcher
p specs.Platform
}
func (m *onlyFallbackMatcher) Match(other specs.Platform) bool {
if m.only.Match(other) {
// It matches, no reason to fallback
return true
}
if other.Variant != "" {
// If there is a variant then this fallback does not apply, and there is no match
return false
}
otherN := platforms.Normalize(other)
otherN.Variant = "" // normalization adds a default variant... which is the whole problem with `platforms.Only`
return m.p.OS == otherN.OS &&
m.p.Architecture == otherN.Architecture
}
| cpuguy83 | e88af3624b24827896968ea822450496d8a67fb5 | 56ffa614d66cda4cc154661598cd3c687e8020ab | Fixed | cpuguy83 | 5,011 |
moby/moby | 41,949 | Makefile: install buildx from binary release, instead of building | This was originally added in 833444c0d605b0cf86bc9dbdb436601434fd3493 (https://github.com/moby/moby/pull/39340), at which time buildx did not yet have a release, so we had to build from source.
Now that buildx has binary releases on GitHub, we should be able to consume those binaries instead of building.
| null | 2021-01-28 11:14:16+00:00 | 2021-05-20 19:11:06+00:00 | Makefile | .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
# This intentionally is not using the `--output` flag from the docker CLI, which
# is a buildkit option. The idea here being that if buildx is being used, it's
# because buildkit is not supported natively
bundles/buildx: bundles ## build buildx CLI tool
docker build -f $${BUILDX_DOCKERFILE:-Dockerfile.buildx} -t "moby-buildx:$${BUILDX_COMMIT:-latest}" \
--build-arg BUILDX_COMMIT \
--build-arg BUILDX_REPO \
--build-arg GOOS=$$(if [ -n "$(GOOS)" ]; then echo $(GOOS); else go env GOHOSTOS || uname | awk '{print tolower($$0)}' || true; fi) \
--build-arg GOARCH=$$(if [ -n "$(GOARCH)" ]; then echo $(GOARCH); else go env GOHOSTARCH || true; fi) \
.
id=$$(docker create moby-buildx:$${BUILDX_COMMIT:-latest}); \
if [ -n "$${id}" ]; then \
docker cp $${id}:/usr/bin/buildx $@ \
&& touch $@; \
docker rm -f $${id}; \
fi
$@ version
| .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
BUILDX_VERSION ?= v0.5.1
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
bundles/buildx: bundles ## build buildx CLI tool
curl -fsSL https://raw.githubusercontent.com/moby/buildkit/70deac12b5857a1aa4da65e90b262368e2f71500/hack/install-buildx | VERSION="$(BUILDX_VERSION)" BINDIR="$(@D)" bash
$@ version
| thaJeztah | 328d23f62596a2f1aaf0ce4159560093fb61756c | cc68b216d0cb451e5be010eeeb68ff78393466a8 | Discussing with @tonistiigi @cpuguy83 and opting to not do the automatic detection, but to default to ppc64le (which is what we use it for), and a make variable to override. | thaJeztah | 5,012 |
moby/moby | 41,949 | Makefile: install buildx from binary release, instead of building | This was originally added in 833444c0d605b0cf86bc9dbdb436601434fd3493 (https://github.com/moby/moby/pull/39340), at which time buildx did not yet have a release, so we had to build from source.
Now that buildx has binary releases on GitHub, we should be able to consume those binaries instead of building.
| null | 2021-01-28 11:14:16+00:00 | 2021-05-20 19:11:06+00:00 | Makefile | .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
# This intentionally is not using the `--output` flag from the docker CLI, which
# is a buildkit option. The idea here being that if buildx is being used, it's
# because buildkit is not supported natively
bundles/buildx: bundles ## build buildx CLI tool
docker build -f $${BUILDX_DOCKERFILE:-Dockerfile.buildx} -t "moby-buildx:$${BUILDX_COMMIT:-latest}" \
--build-arg BUILDX_COMMIT \
--build-arg BUILDX_REPO \
--build-arg GOOS=$$(if [ -n "$(GOOS)" ]; then echo $(GOOS); else go env GOHOSTOS || uname | awk '{print tolower($$0)}' || true; fi) \
--build-arg GOARCH=$$(if [ -n "$(GOARCH)" ]; then echo $(GOARCH); else go env GOHOSTARCH || true; fi) \
.
id=$$(docker create moby-buildx:$${BUILDX_COMMIT:-latest}); \
if [ -n "$${id}" ]; then \
docker cp $${id}:/usr/bin/buildx $@ \
&& touch $@; \
docker rm -f $${id}; \
fi
$@ version
| .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
BUILDX_VERSION ?= v0.5.1
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
bundles/buildx: bundles ## build buildx CLI tool
curl -fsSL https://raw.githubusercontent.com/moby/buildkit/70deac12b5857a1aa4da65e90b262368e2f71500/hack/install-buildx | VERSION="$(BUILDX_VERSION)" BINDIR="$(@D)" bash
$@ version
| thaJeztah | 328d23f62596a2f1aaf0ce4159560093fb61756c | cc68b216d0cb451e5be010eeeb68ff78393466a8 | We can use the script from https://github.com/moby/buildkit/blob/master/hack/install-buildx (needs some minor changes to allow overriding the parameters) | thaJeztah | 5,013 |
moby/moby | 41,949 | Makefile: install buildx from binary release, instead of building | This was originally added in 833444c0d605b0cf86bc9dbdb436601434fd3493 (https://github.com/moby/moby/pull/39340), at which time buildx did not yet have a release, so we had to build from source.
Now that buildx has binary releases on GitHub, we should be able to consume those binaries instead of building.
| null | 2021-01-28 11:14:16+00:00 | 2021-05-20 19:11:06+00:00 | Makefile | .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
# This intentionally is not using the `--output` flag from the docker CLI, which
# is a buildkit option. The idea here being that if buildx is being used, it's
# because buildkit is not supported natively
bundles/buildx: bundles ## build buildx CLI tool
docker build -f $${BUILDX_DOCKERFILE:-Dockerfile.buildx} -t "moby-buildx:$${BUILDX_COMMIT:-latest}" \
--build-arg BUILDX_COMMIT \
--build-arg BUILDX_REPO \
--build-arg GOOS=$$(if [ -n "$(GOOS)" ]; then echo $(GOOS); else go env GOHOSTOS || uname | awk '{print tolower($$0)}' || true; fi) \
--build-arg GOARCH=$$(if [ -n "$(GOARCH)" ]; then echo $(GOARCH); else go env GOHOSTARCH || true; fi) \
.
id=$$(docker create moby-buildx:$${BUILDX_COMMIT:-latest}); \
if [ -n "$${id}" ]; then \
docker cp $${id}:/usr/bin/buildx $@ \
&& touch $@; \
docker rm -f $${id}; \
fi
$@ version
| .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
BUILDX_VERSION ?= v0.5.1
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
bundles/buildx: bundles ## build buildx CLI tool
curl -fsSL https://raw.githubusercontent.com/moby/buildkit/70deac12b5857a1aa4da65e90b262368e2f71500/hack/install-buildx | VERSION="$(BUILDX_VERSION)" BINDIR="$(@D)" bash
$@ version
| thaJeztah | 328d23f62596a2f1aaf0ce4159560093fb61756c | cc68b216d0cb451e5be010eeeb68ff78393466a8 | Temporarily using my branch from https://github.com/moby/buildkit/pull/2106 | thaJeztah | 5,014 |
moby/moby | 41,949 | Makefile: install buildx from binary release, instead of building | This was originally added in 833444c0d605b0cf86bc9dbdb436601434fd3493 (https://github.com/moby/moby/pull/39340), at which time buildx did not yet have a release, so we had to build from source.
Now that buildx has binary releases on GitHub, we should be able to consume those binaries instead of building.
| null | 2021-01-28 11:14:16+00:00 | 2021-05-20 19:11:06+00:00 | Makefile | .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
# This intentionally is not using the `--output` flag from the docker CLI, which
# is a buildkit option. The idea here being that if buildx is being used, it's
# because buildkit is not supported natively
bundles/buildx: bundles ## build buildx CLI tool
docker build -f $${BUILDX_DOCKERFILE:-Dockerfile.buildx} -t "moby-buildx:$${BUILDX_COMMIT:-latest}" \
--build-arg BUILDX_COMMIT \
--build-arg BUILDX_REPO \
--build-arg GOOS=$$(if [ -n "$(GOOS)" ]; then echo $(GOOS); else go env GOHOSTOS || uname | awk '{print tolower($$0)}' || true; fi) \
--build-arg GOARCH=$$(if [ -n "$(GOARCH)" ]; then echo $(GOARCH); else go env GOHOSTARCH || true; fi) \
.
id=$$(docker create moby-buildx:$${BUILDX_COMMIT:-latest}); \
if [ -n "$${id}" ]; then \
docker cp $${id}:/usr/bin/buildx $@ \
&& touch $@; \
docker rm -f $${id}; \
fi
$@ version
| .PHONY: all binary dynbinary build cross help install manpages run shell test test-docker-py test-integration test-unit validate win
BUILDX_VERSION ?= v0.5.1
ifdef USE_BUILDX
BUILDX ?= $(shell command -v buildx)
BUILDX ?= $(shell command -v docker-buildx)
DOCKER_BUILDX_CLI_PLUGIN_PATH ?= ~/.docker/cli-plugins/docker-buildx
BUILDX ?= $(shell if [ -x "$(DOCKER_BUILDX_CLI_PLUGIN_PATH)" ]; then echo $(DOCKER_BUILDX_CLI_PLUGIN_PATH); fi)
endif
ifndef USE_BUILDX
DOCKER_BUILDKIT := 1
export DOCKER_BUILDKIT
endif
BUILDX ?= bundles/buildx
DOCKER ?= docker
# set the graph driver as the current graphdriver if not set
DOCKER_GRAPHDRIVER := $(if $(DOCKER_GRAPHDRIVER),$(DOCKER_GRAPHDRIVER),$(shell docker info 2>&1 | grep "Storage Driver" | sed 's/.*: //'))
export DOCKER_GRAPHDRIVER
# get OS/Arch of docker engine
DOCKER_OSARCH := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKER_ENGINE_OSARCH}')
DOCKERFILE := $(shell bash -c 'source hack/make/.detect-daemon-osarch && echo $${DOCKERFILE}')
DOCKER_GITCOMMIT := $(shell git rev-parse --short HEAD || echo unsupported)
export DOCKER_GITCOMMIT
# allow overriding the repository and branch that validation scripts are running
# against these are used in hack/validate/.validate to check what changed in the PR.
export VALIDATE_REPO
export VALIDATE_BRANCH
export VALIDATE_ORIGIN_BRANCH
# env vars passed through directly to Docker's build scripts
# to allow things like `make KEEPBUNDLE=1 binary` easily
# `project/PACKAGERS.md` have some limited documentation of some of these
#
# DOCKER_LDFLAGS can be used to pass additional parameters to -ldflags
# option of "go build". For example, a built-in graphdriver priority list
# can be changed during build time like this:
#
# make DOCKER_LDFLAGS="-X github.com/docker/docker/daemon/graphdriver.priority=overlay2,devicemapper" dynbinary
#
DOCKER_ENVS := \
-e DOCKER_CROSSPLATFORMS \
-e BUILD_APT_MIRROR \
-e BUILDFLAGS \
-e KEEPBUNDLE \
-e DOCKER_BUILD_ARGS \
-e DOCKER_BUILD_GOGC \
-e DOCKER_BUILD_OPTS \
-e DOCKER_BUILD_PKGS \
-e DOCKER_BUILDKIT \
-e DOCKER_BASH_COMPLETION_PATH \
-e DOCKER_CLI_PATH \
-e DOCKER_DEBUG \
-e DOCKER_EXPERIMENTAL \
-e DOCKER_GITCOMMIT \
-e DOCKER_GRAPHDRIVER \
-e DOCKER_LDFLAGS \
-e DOCKER_PORT \
-e DOCKER_REMAP_ROOT \
-e DOCKER_ROOTLESS \
-e DOCKER_STORAGE_OPTS \
-e DOCKER_TEST_HOST \
-e DOCKER_USERLANDPROXY \
-e DOCKERD_ARGS \
-e TEST_FORCE_VALIDATE \
-e TEST_INTEGRATION_DIR \
-e TEST_SKIP_INTEGRATION \
-e TEST_SKIP_INTEGRATION_CLI \
-e TESTDEBUG \
-e TESTDIRS \
-e TESTFLAGS \
-e TESTFLAGS_INTEGRATION \
-e TESTFLAGS_INTEGRATION_CLI \
-e TEST_FILTER \
-e TIMEOUT \
-e VALIDATE_REPO \
-e VALIDATE_BRANCH \
-e VALIDATE_ORIGIN_BRANCH \
-e HTTP_PROXY \
-e HTTPS_PROXY \
-e NO_PROXY \
-e http_proxy \
-e https_proxy \
-e no_proxy \
-e VERSION \
-e PLATFORM \
-e DEFAULT_PRODUCT_LICENSE \
-e PRODUCT
# note: we _cannot_ add "-e DOCKER_BUILDTAGS" here because even if it's unset in the shell, that would shadow the "ENV DOCKER_BUILDTAGS" set in our Dockerfile, which is very important for our official builds
# to allow `make BIND_DIR=. shell` or `make BIND_DIR= test`
# (default to no bind mount if DOCKER_HOST is set)
# note: BINDDIR is supported for backwards-compatibility here
BIND_DIR := $(if $(BINDDIR),$(BINDDIR),$(if $(DOCKER_HOST),,bundles))
# DOCKER_MOUNT can be overriden, but use at your own risk!
ifndef DOCKER_MOUNT
DOCKER_MOUNT := $(if $(BIND_DIR),-v "$(CURDIR)/$(BIND_DIR):/go/src/github.com/docker/docker/$(BIND_DIR)")
DOCKER_MOUNT := $(if $(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT):$(DOCKER_BINDDIR_MOUNT_OPTS),$(DOCKER_MOUNT))
# This allows the test suite to be able to run without worrying about the underlying fs used by the container running the daemon (e.g. aufs-on-aufs), so long as the host running the container is running a supported fs.
# The volume will be cleaned up when the container is removed due to `--rm`.
# Note that `BIND_DIR` will already be set to `bundles` if `DOCKER_HOST` is not set (see above BIND_DIR line), in such case this will do nothing since `DOCKER_MOUNT` will already be set.
DOCKER_MOUNT := $(if $(DOCKER_MOUNT),$(DOCKER_MOUNT),-v /go/src/github.com/docker/docker/bundles) -v "$(CURDIR)/.git:/go/src/github.com/docker/docker/.git"
DOCKER_MOUNT_CACHE := -v docker-dev-cache:/root/.cache
DOCKER_MOUNT_CLI := $(if $(DOCKER_CLI_PATH),-v $(shell dirname $(DOCKER_CLI_PATH)):/usr/local/cli,)
DOCKER_MOUNT_BASH_COMPLETION := $(if $(DOCKER_BASH_COMPLETION_PATH),-v $(shell dirname $(DOCKER_BASH_COMPLETION_PATH)):/usr/local/completion/bash,)
DOCKER_MOUNT := $(DOCKER_MOUNT) $(DOCKER_MOUNT_CACHE) $(DOCKER_MOUNT_CLI) $(DOCKER_MOUNT_BASH_COMPLETION)
endif # ifndef DOCKER_MOUNT
# This allows to set the docker-dev container name
DOCKER_CONTAINER_NAME := $(if $(CONTAINER_NAME),--name $(CONTAINER_NAME),)
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
GIT_BRANCH_CLEAN := $(shell echo $(GIT_BRANCH) | sed -e "s/[^[:alnum:]]/-/g")
DOCKER_IMAGE := docker-dev$(if $(GIT_BRANCH_CLEAN),:$(GIT_BRANCH_CLEAN))
DOCKER_PORT_FORWARD := $(if $(DOCKER_PORT),-p "$(DOCKER_PORT)",)
DOCKER_FLAGS := $(DOCKER) run --rm -i --privileged $(DOCKER_CONTAINER_NAME) $(DOCKER_ENVS) $(DOCKER_MOUNT) $(DOCKER_PORT_FORWARD)
BUILD_APT_MIRROR := $(if $(DOCKER_BUILD_APT_MIRROR),--build-arg APT_MIRROR=$(DOCKER_BUILD_APT_MIRROR))
export BUILD_APT_MIRROR
SWAGGER_DOCS_PORT ?= 9000
define \n
endef
# if this session isn't interactive, then we don't want to allocate a
# TTY, which would fail, but if it is interactive, we do want to attach
# so that the user can send e.g. ^C through.
INTERACTIVE := $(shell [ -t 0 ] && echo 1 || echo 0)
ifeq ($(INTERACTIVE), 1)
DOCKER_FLAGS += -t
endif
DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
DOCKER_BUILD_ARGS += --build-arg=GO_VERSION
ifdef DOCKER_SYSTEMD
DOCKER_BUILD_ARGS += --build-arg=SYSTEMD=true
endif
BUILD_OPTS := ${BUILD_APT_MIRROR} ${DOCKER_BUILD_ARGS} ${DOCKER_BUILD_OPTS} -f "$(DOCKERFILE)"
ifdef USE_BUILDX
BUILD_OPTS += $(BUILDX_BUILD_EXTRA_OPTS)
BUILD_CMD := $(BUILDX) build
else
BUILD_CMD := $(DOCKER) build
endif
# This is used for the legacy "build" target and anything still depending on it
BUILD_CROSS =
ifdef DOCKER_CROSS
BUILD_CROSS = --build-arg CROSS=$(DOCKER_CROSS)
endif
ifdef DOCKER_CROSSPLATFORMS
BUILD_CROSS = --build-arg CROSS=true
endif
VERSION_AUTOGEN_ARGS = --build-arg VERSION --build-arg DOCKER_GITCOMMIT --build-arg PRODUCT --build-arg PLATFORM --build-arg DEFAULT_PRODUCT_LICENSE
default: binary
all: build ## validate all checks, build linux binaries, run all tests,\ncross build non-linux binaries, and generate archives
$(DOCKER_RUN_DOCKER) bash -c 'hack/validate/default && hack/make.sh'
# This is only used to work around read-only bind mounts of the source code into
# binary build targets. We end up mounting a tmpfs over autogen which allows us
# to write build-time generated assets even though the source is mounted read-only
# ...But in order to do so, this dir needs to already exist.
autogen:
mkdir -p autogen
binary: buildx autogen ## build statically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
dynbinary: buildx autogen ## build dynamically linked linux binaries
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
cross: BUILD_OPTS += --build-arg CROSS=true --build-arg DOCKER_CROSSPLATFORMS
cross: buildx autogen ## cross build the binaries for darwin, freebsd and\nwindows
$(BUILD_CMD) $(BUILD_OPTS) --output=bundles/ --target=$@ $(VERSION_AUTOGEN_ARGS) .
bundles:
mkdir bundles
.PHONY: clean
clean: clean-cache
.PHONY: clean-cache
clean-cache:
docker volume rm -f docker-dev-cache
help: ## this help
@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z0-9_-]+:.*?## / {gsub("\\\\n",sprintf("\n%22c",""), $$2);printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)
install: ## install the linux binaries
KEEPBUNDLE=1 hack/make.sh install-binary
run: build ## run the docker daemon in a container
$(DOCKER_RUN_DOCKER) sh -c "KEEPBUNDLE=1 hack/make.sh install-binary run"
.PHONY: build
ifeq ($(BIND_DIR), .)
build: shell_target := --target=dev
else
build: shell_target := --target=final
endif
ifdef USE_BUILDX
build: buildx_load := --load
endif
build: buildx
$(BUILD_CMD) $(BUILD_OPTS) $(shell_target) $(buildx_load) $(BUILD_CROSS) -t "$(DOCKER_IMAGE)" .
shell: build ## start a shell inside the build env
$(DOCKER_RUN_DOCKER) bash
test: build test-unit ## run the unit, integration and docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-integration test-docker-py
test-docker-py: build ## run the docker-py tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
test-integration-cli: test-integration ## (DEPRECATED) use test-integration
ifneq ($(and $(TEST_SKIP_INTEGRATION),$(TEST_SKIP_INTEGRATION_CLI)),)
test-integration:
@echo Both integrations suites skipped per environment variables
else
test-integration: build ## run the integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration
endif
test-integration-flaky: build ## run the stress test for all new integration tests
$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-flaky
test-unit: build ## run the unit tests
$(DOCKER_RUN_DOCKER) hack/test/unit
validate: build ## validate DCO, Seccomp profile generation, gofmt,\n./pkg/ isolation, golint, tests, tomls, go vet and vendor
$(DOCKER_RUN_DOCKER) hack/validate/all
win: build ## cross build the binary for windows
$(DOCKER_RUN_DOCKER) DOCKER_CROSSPLATFORMS=windows/amd64 hack/make.sh cross
.PHONY: swagger-gen
swagger-gen:
docker run --rm -v $(PWD):/go/src/github.com/docker/docker \
-w /go/src/github.com/docker/docker \
--entrypoint hack/generate-swagger-api.sh \
-e GOPATH=/go \
quay.io/goswagger/swagger:0.7.4
.PHONY: swagger-docs
swagger-docs: ## preview the API documentation
@echo "API docs preview will be running at http://localhost:$(SWAGGER_DOCS_PORT)"
@docker run --rm -v $(PWD)/api/swagger.yaml:/usr/share/nginx/html/swagger.yaml \
-e 'REDOC_OPTIONS=hide-hostname="true" lazy-rendering' \
-p $(SWAGGER_DOCS_PORT):80 \
bfirsh/redoc:1.6.2
.PHONY: buildx
ifdef USE_BUILDX
ifeq ($(BUILDX), bundles/buildx)
buildx: bundles/buildx ## build buildx cli tool
endif
endif
bundles/buildx: bundles ## build buildx CLI tool
curl -fsSL https://raw.githubusercontent.com/moby/buildkit/70deac12b5857a1aa4da65e90b262368e2f71500/hack/install-buildx | VERSION="$(BUILDX_VERSION)" BINDIR="$(@D)" bash
$@ version
| thaJeztah | 328d23f62596a2f1aaf0ce4159560093fb61756c | cc68b216d0cb451e5be010eeeb68ff78393466a8 | https://github.com/moby/buildkit/pull/2106 was merged 👍 | thaJeztah | 5,015 |
moby/moby | 41,947 | rootless: prevent the service hanging when stopping (set systemd KillMode to mixed) |
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Fix #41944 ("Docker rootless does not exit properly if containers are running")
Now `systemctl --user stop docker` completes just with in 1 or 2 seconds.
**- How I did it**
Changed the KillMode from "control-group" (default) to "mixed"
See systemd.kill(5) https://www.freedesktop.org/software/systemd/man/systemd.kill.html
> Specifies how processes of this unit shall be killed. One of control-group, mixed, process, none.
> If set to control-group, all remaining processes in the control group of this unit will be killed on unit stop (for services: after the stop command is executed, as configured with ExecStop=). If set to mixed, the SIGTERM signal (see below) is sent to the main process while the subsequent SIGKILL signal (see below) is sent to all remaining processes of the unit's control group. If set to process, only the main process itself is killed (not recommended!). If set to none, no process is killed (strongly recommended against!). In this case, only the stop command will be executed on unit stop, but no process will be killed otherwise. Processes remaining alive after stop are left in their control group and the control group continues to exist after stop unless empty.
> Note that it is not recommended to set KillMode= to process or even none, as this allows processes to escape the service manager's lifecycle and resource management, and to remain running even while their service is considered stopped and is assumed to not consume any resources.
> Processes will first be terminated via SIGTERM (unless the signal to send is changed via KillSignal= or RestartKillSignal=). Optionally, this is immediately followed by a SIGHUP (if enabled with SendSIGHUP=). If processes still remain after the main process of a unit has exited or the delay configured via the TimeoutStopSec= has passed, the termination request is repeated with the SIGKILL signal or the signal specified via FinalKillSignal= (unless this is disabled via the SendSIGKILL= option). See kill(2) for more information.
> Defaults to control-group.
"mixed" is available since systemd 209 (2014-02-20) https://github.com/systemd/systemd/blob/57353d2909e503e3e5c7e69251ba95a31e1a72ce/NEWS#L9318
**- How to verify it**
Run some containers with rootless, and make sure `systemctl --user stop docker.service` completes in a few seconds.
```bash
$ docker --context=rootless run --name nginx -d -p 8080:80 --restart=always nginx:alpine
$ time systemctl --user stop docker
real 0m1.266s
user 0m0.005s
sys 0m0.000s
```
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: prevent the service hanging when stopping (set systemd KillMode to mixed)
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-28 06:25:42+00:00 | 2021-01-28 21:00:34+00:00 | contrib/dockerd-rootless-setuptool.sh | #!/bin/sh
# dockerd-rootless-setuptool.sh: setup tool for dockerd-rootless.sh
# Needs to be executed as a non-root user.
#
# Typical usage: dockerd-rootless-setuptool.sh install --force
#
# Documentation: https://docs.docker.com/engine/security/rootless/
set -eu
# utility functions
INFO() {
/bin/echo -e "\e[104m\e[97m[INFO]\e[49m\e[39m $@"
}
WARNING() {
/bin/echo >&2 -e "\e[101m\e[97m[WARNING]\e[49m\e[39m $@"
}
ERROR() {
/bin/echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
}
# constants
DOCKERD_ROOTLESS_SH="dockerd-rootless.sh"
SYSTEMD_UNIT="docker.service"
# CLI opt: --force
OPT_FORCE=""
# CLI opt: --skip-iptables
OPT_SKIP_IPTABLES=""
# global vars
ARG0="$0"
DOCKERD_ROOTLESS_SH_FLAGS=""
BIN=""
SYSTEMD=""
CFG_DIR=""
XDG_RUNTIME_DIR_CREATED=""
# run checks and also initialize global vars
init() {
# OS verification: Linux only
case "$(uname)" in
Linux) ;;
*)
ERROR "Rootless Docker cannot be installed on $(uname)"
exit 1
;;
esac
# User verification: deny running as root
if [ "$(id -u)" = "0" ]; then
ERROR "Refusing to install rootless Docker as the root user"
exit 1
fi
# set BIN
if ! BIN="$(command -v "$DOCKERD_ROOTLESS_SH" 2> /dev/null)"; then
ERROR "$DOCKERD_ROOTLESS_SH needs to be present under \$PATH"
exit 1
fi
BIN=$(dirname "$BIN")
# set SYSTEMD
if systemctl --user show-environment > /dev/null 2>&1; then
SYSTEMD=1
fi
# HOME verification
if [ -z "${HOME:-}" ] || [ ! -d "$HOME" ]; then
ERROR "HOME needs to be set"
exit 1
fi
if [ ! -w "$HOME" ]; then
ERROR "HOME needs to be writable"
exit 1
fi
# set CFG_DIR
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
# Existing rootful docker verification
if [ -w /var/run/docker.sock ] && [ -z "$OPT_FORCE" ]; then
ERROR "Aborting because rootful Docker (/var/run/docker.sock) is running and accessible. Set --force to ignore."
exit 1
fi
# Validate XDG_RUNTIME_DIR and set XDG_RUNTIME_DIR_CREATED
if [ -z "${XDG_RUNTIME_DIR:-}" ] || [ ! -w "$XDG_RUNTIME_DIR" ]; then
if [ -n "$SYSTEMD" ]; then
ERROR "Aborting because systemd was detected but XDG_RUNTIME_DIR (\"$XDG_RUNTIME_DIR\") is not set, does not exist, or is not writable"
ERROR "Hint: this could happen if you changed users with 'su' or 'sudo'. To work around this:"
ERROR "- try again by first running with root privileges 'loginctl enable-linger <user>' where <user> is the unprivileged user and export XDG_RUNTIME_DIR to the value of RuntimePath as shown by 'loginctl show-user <user>'"
ERROR "- or simply log back in as the desired unprivileged user (ssh works for remote machines, machinectl shell works for local machines)"
exit 1
fi
export XDG_RUNTIME_DIR="$HOME/.docker/run"
mkdir -p -m 700 "$XDG_RUNTIME_DIR"
XDG_RUNTIME_DIR_CREATED=1
fi
instructions=""
# instruction: uidmap dependency check
if ! command -v newuidmap > /dev/null 2>&1; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
apt-get install -y uidmap
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
dnf install -y shadow-utils
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
yum install -y shadow-utils
EOI
)
else
ERROR "newuidmap binary not found. Please install with a package manager."
exit 1
fi
fi
# instruction: iptables dependency check
faced_iptables_error=""
if ! command -v iptables > /dev/null 2>&1 && [ ! -f /sbin/iptables ] && [ ! -f /usr/sbin/iptables ]; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
apt-get install -y iptables
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
dnf install -y iptables
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
yum install -y iptables
EOI
)
else
ERROR "iptables binary not found. Please install with a package manager."
exit 1
fi
fi
fi
# instruction: ip_tables module dependency check
if ! grep -q ip_tables /proc/modules 2> /dev/null && ! grep -q ip_tables /lib/modules/$(uname -r)/modules.builtin 2> /dev/null; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Load ip_tables module
modprobe ip_tables
EOI
)
fi
fi
# set DOCKERD_ROOTLESS_SH_FLAGS
if [ -n "$faced_iptables_error" ] && [ -n "$OPT_SKIP_IPTABLES" ]; then
DOCKERD_ROOTLESS_SH_FLAGS="${DOCKERD_ROOTLESS_SH_FLAGS} --iptables=false"
fi
# instruction: Debian and Arch require setting unprivileged_userns_clone
if [ -f /proc/sys/kernel/unprivileged_userns_clone ]; then
if [ "1" != "$(cat /proc/sys/kernel/unprivileged_userns_clone)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set kernel.unprivileged_userns_clone
cat <<EOT > /etc/sysctl.d/50-rootless.conf
kernel.unprivileged_userns_clone = 1
EOT
sysctl --system
EOI
)
fi
fi
# instruction: RHEL/CentOS 7 requires setting max_user_namespaces
if [ -f /proc/sys/user/max_user_namespaces ]; then
if [ "0" = "$(cat /proc/sys/user/max_user_namespaces)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set user.max_user_namespaces
cat <<EOT > /etc/sysctl.d/51-rootless.conf
user.max_user_namespaces = 28633
EOT
sysctl --system
EOI
)
fi
fi
# instructions: validate subuid/subgid files for current user
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subuid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subuid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subuid
EOI
)
fi
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subgid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subgid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subgid
EOI
)
fi
# fail with instructions if requirements are not satisfied.
if [ -n "$instructions" ]; then
ERROR "Missing system requirements. Run the following commands to"
ERROR "install the requirements and run this tool again."
if [ -n "$faced_iptables_error" ] && [ -z "$OPT_SKIP_IPTABLES" ]; then
ERROR "Alternatively iptables checks can be disabled with --skip-iptables ."
fi
echo
echo "########## BEGIN ##########"
echo "sudo sh -eux <<EOF"
echo "$instructions" | sed -e '/^$/d'
echo "EOF"
echo "########## END ##########"
echo
exit 1
fi
# TODO: support printing non-essential but recommended instructions:
# - sysctl: "net.ipv4.ping_group_range"
# - sysctl: "net.ipv4.ip_unprivileged_port_start"
# - external binary: slirp4netns
# - external binary: fuse-overlayfs
}
# CLI subcommand: "check"
cmd_entrypoint_check() {
# requirements are already checked in init()
INFO "Requirements are satisfied"
}
show_systemd_error() {
n="20"
ERROR "Failed to start ${SYSTEMD_UNIT}. Run \`journalctl -n ${n} --no-pager --user --unit ${SYSTEMD_UNIT}\` to show the error log."
ERROR "Before retrying installation, you might need to uninstall the current setup: \`$0 uninstall -f ; ${BIN}/rootlesskit rm -rf ${HOME}/.local/share/docker\`"
if journalctl -q -n ${n} --user --unit ${SYSTEMD_UNIT} | grep -qF "/run/xtables.lock: Permission denied"; then
ERROR "Failure likely related to https://github.com/moby/moby/issues/41230"
ERROR "This may work as a workaround: \`sudo dnf install -y policycoreutils-python-utils && sudo semanage permissive -a iptables_t\`"
fi
}
# install (systemd)
install_systemd() {
mkdir -p "${CFG_DIR}/systemd/user"
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
if [ -f "${unit_file}" ]; then
WARNING "File already exists, skipping: ${unit_file}"
else
INFO "Creating ${unit_file}"
cat <<- EOT > "${unit_file}"
[Unit]
Description=Docker Application Container Engine (Rootless)
Documentation=https://docs.docker.com/engine/security/rootless/
[Service]
Environment=PATH=$BIN:/sbin:/usr/sbin:$PATH
ExecStart=$BIN/dockerd-rootless.sh $DOCKERD_ROOTLESS_SH_FLAGS
ExecReload=/bin/kill -s HUP \$MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
Type=simple
[Install]
WantedBy=default.target
EOT
systemctl --user daemon-reload
fi
if ! systemctl --user --no-pager status "${SYSTEMD_UNIT}" > /dev/null 2>&1; then
INFO "starting systemd service ${SYSTEMD_UNIT}"
(
set -x
if ! systemctl --user start "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
sleep 3
)
fi
(
set -x
if ! systemctl --user --no-pager --full status "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
DOCKER_HOST="unix://$XDG_RUNTIME_DIR/docker.sock" $BIN/docker version
systemctl --user enable "${SYSTEMD_UNIT}"
)
INFO "Installed ${SYSTEMD_UNIT} successfully."
INFO "To control ${SYSTEMD_UNIT}, run: \`systemctl --user (start|stop|restart) ${SYSTEMD_UNIT}\`"
INFO "To run ${SYSTEMD_UNIT} on system startup, run: \`sudo loginctl enable-linger $(id -un)\`"
echo
}
# install (non-systemd)
install_nonsystemd() {
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be started manually:"
echo
echo "PATH=$BIN:/sbin:/usr/sbin:\$PATH ${DOCKERD_ROOTLESS_SH} ${DOCKERD_ROOTLESS_SH_FLAGS}"
echo
}
# CLI subcommand: "install"
cmd_entrypoint_install() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
install_nonsystemd
else
install_systemd
fi
INFO "Make sure the following environment variables are set (or add them to ~/.bashrc):"
echo
if [ -n "$XDG_RUNTIME_DIR_CREATED" ]; then
echo "# WARNING: systemd not found. You have to remove XDG_RUNTIME_DIR manually on every logout."
echo "export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR}"
fi
echo "export PATH=${BIN}:\$PATH"
echo "export DOCKER_HOST=unix://${XDG_RUNTIME_DIR}/docker.sock"
echo
}
# CLI subcommand: "uninstall"
cmd_entrypoint_uninstall() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be stopped manually:"
else
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
(
set -x
systemctl --user stop "${SYSTEMD_UNIT}"
) || :
(
set -x
systemctl --user disable "${SYSTEMD_UNIT}"
) || :
rm -f "${unit_file}"
INFO "Uninstalled ${SYSTEMD_UNIT}"
fi
INFO "This uninstallation tool does NOT remove Docker binaries and data."
INFO "To remove data, run: \`$BIN/rootlesskit rm -rf $HOME/.local/share/docker\`"
}
# text for --help
usage() {
echo "Usage: ${ARG0} [OPTIONS] COMMAND"
echo
echo "A setup tool for Rootless Docker (${DOCKERD_ROOTLESS_SH})."
echo
echo "Documentation: https://docs.docker.com/engine/security/rootless/"
echo
echo "Options:"
echo " -f, --force Ignore rootful Docker (/var/run/docker.sock)"
echo " --skip-iptables Ignore missing iptables"
echo
echo "Commands:"
echo " check Check prerequisites"
echo " install Install systemd unit (if systemd is available) and show how to manage the service"
echo " uninstall Uninstall systemd unit"
}
# parse CLI args
if ! args="$(getopt -o hf --long help,force,skip-iptables -n "$ARG0" -- "$@")"; then
usage
exit 1
fi
eval set -- "$args"
while [ "$#" -gt 0 ]; do
arg="$1"
shift
case "$arg" in
-h | --help)
usage
exit 0
;;
-f | --force)
OPT_FORCE=1
;;
--skip-iptables)
OPT_SKIP_IPTABLES=1
;;
--)
break
;;
*)
# XXX this means we missed something in our "getopt" arguments above!
ERROR "Scripting error, unknown argument '$arg' when parsing script arguments."
exit 1
;;
esac
done
command="${1:-}"
if [ -z "$command" ]; then
ERROR "No command was specified. Run with --help to see the usage. Maybe you want to run \`$ARG0 install\`?"
exit 1
fi
if ! command -v "cmd_entrypoint_${command}" > /dev/null 2>&1; then
ERROR "Unknown command: ${command}. Run with --help to see the usage."
exit 1
fi
# main
init
"cmd_entrypoint_${command}"
| #!/bin/sh
# dockerd-rootless-setuptool.sh: setup tool for dockerd-rootless.sh
# Needs to be executed as a non-root user.
#
# Typical usage: dockerd-rootless-setuptool.sh install --force
#
# Documentation: https://docs.docker.com/engine/security/rootless/
set -eu
# utility functions
INFO() {
/bin/echo -e "\e[104m\e[97m[INFO]\e[49m\e[39m $@"
}
WARNING() {
/bin/echo >&2 -e "\e[101m\e[97m[WARNING]\e[49m\e[39m $@"
}
ERROR() {
/bin/echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
}
# constants
DOCKERD_ROOTLESS_SH="dockerd-rootless.sh"
SYSTEMD_UNIT="docker.service"
# CLI opt: --force
OPT_FORCE=""
# CLI opt: --skip-iptables
OPT_SKIP_IPTABLES=""
# global vars
ARG0="$0"
DOCKERD_ROOTLESS_SH_FLAGS=""
BIN=""
SYSTEMD=""
CFG_DIR=""
XDG_RUNTIME_DIR_CREATED=""
# run checks and also initialize global vars
init() {
# OS verification: Linux only
case "$(uname)" in
Linux) ;;
*)
ERROR "Rootless Docker cannot be installed on $(uname)"
exit 1
;;
esac
# User verification: deny running as root
if [ "$(id -u)" = "0" ]; then
ERROR "Refusing to install rootless Docker as the root user"
exit 1
fi
# set BIN
if ! BIN="$(command -v "$DOCKERD_ROOTLESS_SH" 2> /dev/null)"; then
ERROR "$DOCKERD_ROOTLESS_SH needs to be present under \$PATH"
exit 1
fi
BIN=$(dirname "$BIN")
# set SYSTEMD
if systemctl --user show-environment > /dev/null 2>&1; then
SYSTEMD=1
fi
# HOME verification
if [ -z "${HOME:-}" ] || [ ! -d "$HOME" ]; then
ERROR "HOME needs to be set"
exit 1
fi
if [ ! -w "$HOME" ]; then
ERROR "HOME needs to be writable"
exit 1
fi
# set CFG_DIR
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
# Existing rootful docker verification
if [ -w /var/run/docker.sock ] && [ -z "$OPT_FORCE" ]; then
ERROR "Aborting because rootful Docker (/var/run/docker.sock) is running and accessible. Set --force to ignore."
exit 1
fi
# Validate XDG_RUNTIME_DIR and set XDG_RUNTIME_DIR_CREATED
if [ -z "${XDG_RUNTIME_DIR:-}" ] || [ ! -w "$XDG_RUNTIME_DIR" ]; then
if [ -n "$SYSTEMD" ]; then
ERROR "Aborting because systemd was detected but XDG_RUNTIME_DIR (\"$XDG_RUNTIME_DIR\") is not set, does not exist, or is not writable"
ERROR "Hint: this could happen if you changed users with 'su' or 'sudo'. To work around this:"
ERROR "- try again by first running with root privileges 'loginctl enable-linger <user>' where <user> is the unprivileged user and export XDG_RUNTIME_DIR to the value of RuntimePath as shown by 'loginctl show-user <user>'"
ERROR "- or simply log back in as the desired unprivileged user (ssh works for remote machines, machinectl shell works for local machines)"
exit 1
fi
export XDG_RUNTIME_DIR="$HOME/.docker/run"
mkdir -p -m 700 "$XDG_RUNTIME_DIR"
XDG_RUNTIME_DIR_CREATED=1
fi
instructions=""
# instruction: uidmap dependency check
if ! command -v newuidmap > /dev/null 2>&1; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
apt-get install -y uidmap
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
dnf install -y shadow-utils
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
yum install -y shadow-utils
EOI
)
else
ERROR "newuidmap binary not found. Please install with a package manager."
exit 1
fi
fi
# instruction: iptables dependency check
faced_iptables_error=""
if ! command -v iptables > /dev/null 2>&1 && [ ! -f /sbin/iptables ] && [ ! -f /usr/sbin/iptables ]; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
apt-get install -y iptables
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
dnf install -y iptables
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
yum install -y iptables
EOI
)
else
ERROR "iptables binary not found. Please install with a package manager."
exit 1
fi
fi
fi
# instruction: ip_tables module dependency check
if ! grep -q ip_tables /proc/modules 2> /dev/null && ! grep -q ip_tables /lib/modules/$(uname -r)/modules.builtin 2> /dev/null; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Load ip_tables module
modprobe ip_tables
EOI
)
fi
fi
# set DOCKERD_ROOTLESS_SH_FLAGS
if [ -n "$faced_iptables_error" ] && [ -n "$OPT_SKIP_IPTABLES" ]; then
DOCKERD_ROOTLESS_SH_FLAGS="${DOCKERD_ROOTLESS_SH_FLAGS} --iptables=false"
fi
# instruction: Debian and Arch require setting unprivileged_userns_clone
if [ -f /proc/sys/kernel/unprivileged_userns_clone ]; then
if [ "1" != "$(cat /proc/sys/kernel/unprivileged_userns_clone)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set kernel.unprivileged_userns_clone
cat <<EOT > /etc/sysctl.d/50-rootless.conf
kernel.unprivileged_userns_clone = 1
EOT
sysctl --system
EOI
)
fi
fi
# instruction: RHEL/CentOS 7 requires setting max_user_namespaces
if [ -f /proc/sys/user/max_user_namespaces ]; then
if [ "0" = "$(cat /proc/sys/user/max_user_namespaces)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set user.max_user_namespaces
cat <<EOT > /etc/sysctl.d/51-rootless.conf
user.max_user_namespaces = 28633
EOT
sysctl --system
EOI
)
fi
fi
# instructions: validate subuid/subgid files for current user
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subuid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subuid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subuid
EOI
)
fi
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subgid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subgid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subgid
EOI
)
fi
# fail with instructions if requirements are not satisfied.
if [ -n "$instructions" ]; then
ERROR "Missing system requirements. Run the following commands to"
ERROR "install the requirements and run this tool again."
if [ -n "$faced_iptables_error" ] && [ -z "$OPT_SKIP_IPTABLES" ]; then
ERROR "Alternatively iptables checks can be disabled with --skip-iptables ."
fi
echo
echo "########## BEGIN ##########"
echo "sudo sh -eux <<EOF"
echo "$instructions" | sed -e '/^$/d'
echo "EOF"
echo "########## END ##########"
echo
exit 1
fi
# TODO: support printing non-essential but recommended instructions:
# - sysctl: "net.ipv4.ping_group_range"
# - sysctl: "net.ipv4.ip_unprivileged_port_start"
# - external binary: slirp4netns
# - external binary: fuse-overlayfs
}
# CLI subcommand: "check"
cmd_entrypoint_check() {
# requirements are already checked in init()
INFO "Requirements are satisfied"
}
show_systemd_error() {
n="20"
ERROR "Failed to start ${SYSTEMD_UNIT}. Run \`journalctl -n ${n} --no-pager --user --unit ${SYSTEMD_UNIT}\` to show the error log."
ERROR "Before retrying installation, you might need to uninstall the current setup: \`$0 uninstall -f ; ${BIN}/rootlesskit rm -rf ${HOME}/.local/share/docker\`"
if journalctl -q -n ${n} --user --unit ${SYSTEMD_UNIT} | grep -qF "/run/xtables.lock: Permission denied"; then
ERROR "Failure likely related to https://github.com/moby/moby/issues/41230"
ERROR "This may work as a workaround: \`sudo dnf install -y policycoreutils-python-utils && sudo semanage permissive -a iptables_t\`"
fi
}
# install (systemd)
install_systemd() {
mkdir -p "${CFG_DIR}/systemd/user"
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
if [ -f "${unit_file}" ]; then
WARNING "File already exists, skipping: ${unit_file}"
else
INFO "Creating ${unit_file}"
cat <<- EOT > "${unit_file}"
[Unit]
Description=Docker Application Container Engine (Rootless)
Documentation=https://docs.docker.com/engine/security/rootless/
[Service]
Environment=PATH=$BIN:/sbin:/usr/sbin:$PATH
ExecStart=$BIN/dockerd-rootless.sh $DOCKERD_ROOTLESS_SH_FLAGS
ExecReload=/bin/kill -s HUP \$MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
Type=simple
KillMode=mixed
[Install]
WantedBy=default.target
EOT
systemctl --user daemon-reload
fi
if ! systemctl --user --no-pager status "${SYSTEMD_UNIT}" > /dev/null 2>&1; then
INFO "starting systemd service ${SYSTEMD_UNIT}"
(
set -x
if ! systemctl --user start "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
sleep 3
)
fi
(
set -x
if ! systemctl --user --no-pager --full status "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
DOCKER_HOST="unix://$XDG_RUNTIME_DIR/docker.sock" $BIN/docker version
systemctl --user enable "${SYSTEMD_UNIT}"
)
INFO "Installed ${SYSTEMD_UNIT} successfully."
INFO "To control ${SYSTEMD_UNIT}, run: \`systemctl --user (start|stop|restart) ${SYSTEMD_UNIT}\`"
INFO "To run ${SYSTEMD_UNIT} on system startup, run: \`sudo loginctl enable-linger $(id -un)\`"
echo
}
# install (non-systemd)
install_nonsystemd() {
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be started manually:"
echo
echo "PATH=$BIN:/sbin:/usr/sbin:\$PATH ${DOCKERD_ROOTLESS_SH} ${DOCKERD_ROOTLESS_SH_FLAGS}"
echo
}
# CLI subcommand: "install"
cmd_entrypoint_install() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
install_nonsystemd
else
install_systemd
fi
INFO "Make sure the following environment variables are set (or add them to ~/.bashrc):"
echo
if [ -n "$XDG_RUNTIME_DIR_CREATED" ]; then
echo "# WARNING: systemd not found. You have to remove XDG_RUNTIME_DIR manually on every logout."
echo "export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR}"
fi
echo "export PATH=${BIN}:\$PATH"
echo "export DOCKER_HOST=unix://${XDG_RUNTIME_DIR}/docker.sock"
echo
}
# CLI subcommand: "uninstall"
cmd_entrypoint_uninstall() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be stopped manually:"
else
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
(
set -x
systemctl --user stop "${SYSTEMD_UNIT}"
) || :
(
set -x
systemctl --user disable "${SYSTEMD_UNIT}"
) || :
rm -f "${unit_file}"
INFO "Uninstalled ${SYSTEMD_UNIT}"
fi
INFO "This uninstallation tool does NOT remove Docker binaries and data."
INFO "To remove data, run: \`$BIN/rootlesskit rm -rf $HOME/.local/share/docker\`"
}
# text for --help
usage() {
echo "Usage: ${ARG0} [OPTIONS] COMMAND"
echo
echo "A setup tool for Rootless Docker (${DOCKERD_ROOTLESS_SH})."
echo
echo "Documentation: https://docs.docker.com/engine/security/rootless/"
echo
echo "Options:"
echo " -f, --force Ignore rootful Docker (/var/run/docker.sock)"
echo " --skip-iptables Ignore missing iptables"
echo
echo "Commands:"
echo " check Check prerequisites"
echo " install Install systemd unit (if systemd is available) and show how to manage the service"
echo " uninstall Uninstall systemd unit"
}
# parse CLI args
if ! args="$(getopt -o hf --long help,force,skip-iptables -n "$ARG0" -- "$@")"; then
usage
exit 1
fi
eval set -- "$args"
while [ "$#" -gt 0 ]; do
arg="$1"
shift
case "$arg" in
-h | --help)
usage
exit 0
;;
-f | --force)
OPT_FORCE=1
;;
--skip-iptables)
OPT_SKIP_IPTABLES=1
;;
--)
break
;;
*)
# XXX this means we missed something in our "getopt" arguments above!
ERROR "Scripting error, unknown argument '$arg' when parsing script arguments."
exit 1
;;
esac
done
command="${1:-}"
if [ -z "$command" ]; then
ERROR "No command was specified. Run with --help to see the usage. Maybe you want to run \`$ARG0 install\`?"
exit 1
fi
if ! command -v "cmd_entrypoint_${command}" > /dev/null 2>&1; then
ERROR "Unknown command: ${command}. Run with --help to see the usage."
exit 1
fi
# main
init
"cmd_entrypoint_${command}"
| AkihiroSuda | 35c2d1cd3cddb8ec070a05e341f7e1bd847b0aa3 | 3c3a2ff2d421491d0e1462a18d8ac740801c7257 | Does/should rootless mode support "live-restore"? ISTR we use "process" in the regular systemd unit because of that; https://github.com/docker/docker-ce-packaging/blob/master/systemd/docker.service#L43 | thaJeztah | 5,016 |
moby/moby | 41,947 | rootless: prevent the service hanging when stopping (set systemd KillMode to mixed) |
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Fix #41944 ("Docker rootless does not exit properly if containers are running")
Now `systemctl --user stop docker` completes just with in 1 or 2 seconds.
**- How I did it**
Changed the KillMode from "control-group" (default) to "mixed"
See systemd.kill(5) https://www.freedesktop.org/software/systemd/man/systemd.kill.html
> Specifies how processes of this unit shall be killed. One of control-group, mixed, process, none.
> If set to control-group, all remaining processes in the control group of this unit will be killed on unit stop (for services: after the stop command is executed, as configured with ExecStop=). If set to mixed, the SIGTERM signal (see below) is sent to the main process while the subsequent SIGKILL signal (see below) is sent to all remaining processes of the unit's control group. If set to process, only the main process itself is killed (not recommended!). If set to none, no process is killed (strongly recommended against!). In this case, only the stop command will be executed on unit stop, but no process will be killed otherwise. Processes remaining alive after stop are left in their control group and the control group continues to exist after stop unless empty.
> Note that it is not recommended to set KillMode= to process or even none, as this allows processes to escape the service manager's lifecycle and resource management, and to remain running even while their service is considered stopped and is assumed to not consume any resources.
> Processes will first be terminated via SIGTERM (unless the signal to send is changed via KillSignal= or RestartKillSignal=). Optionally, this is immediately followed by a SIGHUP (if enabled with SendSIGHUP=). If processes still remain after the main process of a unit has exited or the delay configured via the TimeoutStopSec= has passed, the termination request is repeated with the SIGKILL signal or the signal specified via FinalKillSignal= (unless this is disabled via the SendSIGKILL= option). See kill(2) for more information.
> Defaults to control-group.
"mixed" is available since systemd 209 (2014-02-20) https://github.com/systemd/systemd/blob/57353d2909e503e3e5c7e69251ba95a31e1a72ce/NEWS#L9318
**- How to verify it**
Run some containers with rootless, and make sure `systemctl --user stop docker.service` completes in a few seconds.
```bash
$ docker --context=rootless run --name nginx -d -p 8080:80 --restart=always nginx:alpine
$ time systemctl --user stop docker
real 0m1.266s
user 0m0.005s
sys 0m0.000s
```
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: prevent the service hanging when stopping (set systemd KillMode to mixed)
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-28 06:25:42+00:00 | 2021-01-28 21:00:34+00:00 | contrib/dockerd-rootless-setuptool.sh | #!/bin/sh
# dockerd-rootless-setuptool.sh: setup tool for dockerd-rootless.sh
# Needs to be executed as a non-root user.
#
# Typical usage: dockerd-rootless-setuptool.sh install --force
#
# Documentation: https://docs.docker.com/engine/security/rootless/
set -eu
# utility functions
INFO() {
/bin/echo -e "\e[104m\e[97m[INFO]\e[49m\e[39m $@"
}
WARNING() {
/bin/echo >&2 -e "\e[101m\e[97m[WARNING]\e[49m\e[39m $@"
}
ERROR() {
/bin/echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
}
# constants
DOCKERD_ROOTLESS_SH="dockerd-rootless.sh"
SYSTEMD_UNIT="docker.service"
# CLI opt: --force
OPT_FORCE=""
# CLI opt: --skip-iptables
OPT_SKIP_IPTABLES=""
# global vars
ARG0="$0"
DOCKERD_ROOTLESS_SH_FLAGS=""
BIN=""
SYSTEMD=""
CFG_DIR=""
XDG_RUNTIME_DIR_CREATED=""
# run checks and also initialize global vars
init() {
# OS verification: Linux only
case "$(uname)" in
Linux) ;;
*)
ERROR "Rootless Docker cannot be installed on $(uname)"
exit 1
;;
esac
# User verification: deny running as root
if [ "$(id -u)" = "0" ]; then
ERROR "Refusing to install rootless Docker as the root user"
exit 1
fi
# set BIN
if ! BIN="$(command -v "$DOCKERD_ROOTLESS_SH" 2> /dev/null)"; then
ERROR "$DOCKERD_ROOTLESS_SH needs to be present under \$PATH"
exit 1
fi
BIN=$(dirname "$BIN")
# set SYSTEMD
if systemctl --user show-environment > /dev/null 2>&1; then
SYSTEMD=1
fi
# HOME verification
if [ -z "${HOME:-}" ] || [ ! -d "$HOME" ]; then
ERROR "HOME needs to be set"
exit 1
fi
if [ ! -w "$HOME" ]; then
ERROR "HOME needs to be writable"
exit 1
fi
# set CFG_DIR
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
# Existing rootful docker verification
if [ -w /var/run/docker.sock ] && [ -z "$OPT_FORCE" ]; then
ERROR "Aborting because rootful Docker (/var/run/docker.sock) is running and accessible. Set --force to ignore."
exit 1
fi
# Validate XDG_RUNTIME_DIR and set XDG_RUNTIME_DIR_CREATED
if [ -z "${XDG_RUNTIME_DIR:-}" ] || [ ! -w "$XDG_RUNTIME_DIR" ]; then
if [ -n "$SYSTEMD" ]; then
ERROR "Aborting because systemd was detected but XDG_RUNTIME_DIR (\"$XDG_RUNTIME_DIR\") is not set, does not exist, or is not writable"
ERROR "Hint: this could happen if you changed users with 'su' or 'sudo'. To work around this:"
ERROR "- try again by first running with root privileges 'loginctl enable-linger <user>' where <user> is the unprivileged user and export XDG_RUNTIME_DIR to the value of RuntimePath as shown by 'loginctl show-user <user>'"
ERROR "- or simply log back in as the desired unprivileged user (ssh works for remote machines, machinectl shell works for local machines)"
exit 1
fi
export XDG_RUNTIME_DIR="$HOME/.docker/run"
mkdir -p -m 700 "$XDG_RUNTIME_DIR"
XDG_RUNTIME_DIR_CREATED=1
fi
instructions=""
# instruction: uidmap dependency check
if ! command -v newuidmap > /dev/null 2>&1; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
apt-get install -y uidmap
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
dnf install -y shadow-utils
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
yum install -y shadow-utils
EOI
)
else
ERROR "newuidmap binary not found. Please install with a package manager."
exit 1
fi
fi
# instruction: iptables dependency check
faced_iptables_error=""
if ! command -v iptables > /dev/null 2>&1 && [ ! -f /sbin/iptables ] && [ ! -f /usr/sbin/iptables ]; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
apt-get install -y iptables
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
dnf install -y iptables
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
yum install -y iptables
EOI
)
else
ERROR "iptables binary not found. Please install with a package manager."
exit 1
fi
fi
fi
# instruction: ip_tables module dependency check
if ! grep -q ip_tables /proc/modules 2> /dev/null && ! grep -q ip_tables /lib/modules/$(uname -r)/modules.builtin 2> /dev/null; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Load ip_tables module
modprobe ip_tables
EOI
)
fi
fi
# set DOCKERD_ROOTLESS_SH_FLAGS
if [ -n "$faced_iptables_error" ] && [ -n "$OPT_SKIP_IPTABLES" ]; then
DOCKERD_ROOTLESS_SH_FLAGS="${DOCKERD_ROOTLESS_SH_FLAGS} --iptables=false"
fi
# instruction: Debian and Arch require setting unprivileged_userns_clone
if [ -f /proc/sys/kernel/unprivileged_userns_clone ]; then
if [ "1" != "$(cat /proc/sys/kernel/unprivileged_userns_clone)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set kernel.unprivileged_userns_clone
cat <<EOT > /etc/sysctl.d/50-rootless.conf
kernel.unprivileged_userns_clone = 1
EOT
sysctl --system
EOI
)
fi
fi
# instruction: RHEL/CentOS 7 requires setting max_user_namespaces
if [ -f /proc/sys/user/max_user_namespaces ]; then
if [ "0" = "$(cat /proc/sys/user/max_user_namespaces)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set user.max_user_namespaces
cat <<EOT > /etc/sysctl.d/51-rootless.conf
user.max_user_namespaces = 28633
EOT
sysctl --system
EOI
)
fi
fi
# instructions: validate subuid/subgid files for current user
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subuid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subuid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subuid
EOI
)
fi
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subgid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subgid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subgid
EOI
)
fi
# fail with instructions if requirements are not satisfied.
if [ -n "$instructions" ]; then
ERROR "Missing system requirements. Run the following commands to"
ERROR "install the requirements and run this tool again."
if [ -n "$faced_iptables_error" ] && [ -z "$OPT_SKIP_IPTABLES" ]; then
ERROR "Alternatively iptables checks can be disabled with --skip-iptables ."
fi
echo
echo "########## BEGIN ##########"
echo "sudo sh -eux <<EOF"
echo "$instructions" | sed -e '/^$/d'
echo "EOF"
echo "########## END ##########"
echo
exit 1
fi
# TODO: support printing non-essential but recommended instructions:
# - sysctl: "net.ipv4.ping_group_range"
# - sysctl: "net.ipv4.ip_unprivileged_port_start"
# - external binary: slirp4netns
# - external binary: fuse-overlayfs
}
# CLI subcommand: "check"
cmd_entrypoint_check() {
# requirements are already checked in init()
INFO "Requirements are satisfied"
}
show_systemd_error() {
n="20"
ERROR "Failed to start ${SYSTEMD_UNIT}. Run \`journalctl -n ${n} --no-pager --user --unit ${SYSTEMD_UNIT}\` to show the error log."
ERROR "Before retrying installation, you might need to uninstall the current setup: \`$0 uninstall -f ; ${BIN}/rootlesskit rm -rf ${HOME}/.local/share/docker\`"
if journalctl -q -n ${n} --user --unit ${SYSTEMD_UNIT} | grep -qF "/run/xtables.lock: Permission denied"; then
ERROR "Failure likely related to https://github.com/moby/moby/issues/41230"
ERROR "This may work as a workaround: \`sudo dnf install -y policycoreutils-python-utils && sudo semanage permissive -a iptables_t\`"
fi
}
# install (systemd)
install_systemd() {
mkdir -p "${CFG_DIR}/systemd/user"
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
if [ -f "${unit_file}" ]; then
WARNING "File already exists, skipping: ${unit_file}"
else
INFO "Creating ${unit_file}"
cat <<- EOT > "${unit_file}"
[Unit]
Description=Docker Application Container Engine (Rootless)
Documentation=https://docs.docker.com/engine/security/rootless/
[Service]
Environment=PATH=$BIN:/sbin:/usr/sbin:$PATH
ExecStart=$BIN/dockerd-rootless.sh $DOCKERD_ROOTLESS_SH_FLAGS
ExecReload=/bin/kill -s HUP \$MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
Type=simple
[Install]
WantedBy=default.target
EOT
systemctl --user daemon-reload
fi
if ! systemctl --user --no-pager status "${SYSTEMD_UNIT}" > /dev/null 2>&1; then
INFO "starting systemd service ${SYSTEMD_UNIT}"
(
set -x
if ! systemctl --user start "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
sleep 3
)
fi
(
set -x
if ! systemctl --user --no-pager --full status "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
DOCKER_HOST="unix://$XDG_RUNTIME_DIR/docker.sock" $BIN/docker version
systemctl --user enable "${SYSTEMD_UNIT}"
)
INFO "Installed ${SYSTEMD_UNIT} successfully."
INFO "To control ${SYSTEMD_UNIT}, run: \`systemctl --user (start|stop|restart) ${SYSTEMD_UNIT}\`"
INFO "To run ${SYSTEMD_UNIT} on system startup, run: \`sudo loginctl enable-linger $(id -un)\`"
echo
}
# install (non-systemd)
install_nonsystemd() {
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be started manually:"
echo
echo "PATH=$BIN:/sbin:/usr/sbin:\$PATH ${DOCKERD_ROOTLESS_SH} ${DOCKERD_ROOTLESS_SH_FLAGS}"
echo
}
# CLI subcommand: "install"
cmd_entrypoint_install() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
install_nonsystemd
else
install_systemd
fi
INFO "Make sure the following environment variables are set (or add them to ~/.bashrc):"
echo
if [ -n "$XDG_RUNTIME_DIR_CREATED" ]; then
echo "# WARNING: systemd not found. You have to remove XDG_RUNTIME_DIR manually on every logout."
echo "export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR}"
fi
echo "export PATH=${BIN}:\$PATH"
echo "export DOCKER_HOST=unix://${XDG_RUNTIME_DIR}/docker.sock"
echo
}
# CLI subcommand: "uninstall"
cmd_entrypoint_uninstall() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be stopped manually:"
else
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
(
set -x
systemctl --user stop "${SYSTEMD_UNIT}"
) || :
(
set -x
systemctl --user disable "${SYSTEMD_UNIT}"
) || :
rm -f "${unit_file}"
INFO "Uninstalled ${SYSTEMD_UNIT}"
fi
INFO "This uninstallation tool does NOT remove Docker binaries and data."
INFO "To remove data, run: \`$BIN/rootlesskit rm -rf $HOME/.local/share/docker\`"
}
# text for --help
usage() {
echo "Usage: ${ARG0} [OPTIONS] COMMAND"
echo
echo "A setup tool for Rootless Docker (${DOCKERD_ROOTLESS_SH})."
echo
echo "Documentation: https://docs.docker.com/engine/security/rootless/"
echo
echo "Options:"
echo " -f, --force Ignore rootful Docker (/var/run/docker.sock)"
echo " --skip-iptables Ignore missing iptables"
echo
echo "Commands:"
echo " check Check prerequisites"
echo " install Install systemd unit (if systemd is available) and show how to manage the service"
echo " uninstall Uninstall systemd unit"
}
# parse CLI args
if ! args="$(getopt -o hf --long help,force,skip-iptables -n "$ARG0" -- "$@")"; then
usage
exit 1
fi
eval set -- "$args"
while [ "$#" -gt 0 ]; do
arg="$1"
shift
case "$arg" in
-h | --help)
usage
exit 0
;;
-f | --force)
OPT_FORCE=1
;;
--skip-iptables)
OPT_SKIP_IPTABLES=1
;;
--)
break
;;
*)
# XXX this means we missed something in our "getopt" arguments above!
ERROR "Scripting error, unknown argument '$arg' when parsing script arguments."
exit 1
;;
esac
done
command="${1:-}"
if [ -z "$command" ]; then
ERROR "No command was specified. Run with --help to see the usage. Maybe you want to run \`$ARG0 install\`?"
exit 1
fi
if ! command -v "cmd_entrypoint_${command}" > /dev/null 2>&1; then
ERROR "Unknown command: ${command}. Run with --help to see the usage."
exit 1
fi
# main
init
"cmd_entrypoint_${command}"
| #!/bin/sh
# dockerd-rootless-setuptool.sh: setup tool for dockerd-rootless.sh
# Needs to be executed as a non-root user.
#
# Typical usage: dockerd-rootless-setuptool.sh install --force
#
# Documentation: https://docs.docker.com/engine/security/rootless/
set -eu
# utility functions
INFO() {
/bin/echo -e "\e[104m\e[97m[INFO]\e[49m\e[39m $@"
}
WARNING() {
/bin/echo >&2 -e "\e[101m\e[97m[WARNING]\e[49m\e[39m $@"
}
ERROR() {
/bin/echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
}
# constants
DOCKERD_ROOTLESS_SH="dockerd-rootless.sh"
SYSTEMD_UNIT="docker.service"
# CLI opt: --force
OPT_FORCE=""
# CLI opt: --skip-iptables
OPT_SKIP_IPTABLES=""
# global vars
ARG0="$0"
DOCKERD_ROOTLESS_SH_FLAGS=""
BIN=""
SYSTEMD=""
CFG_DIR=""
XDG_RUNTIME_DIR_CREATED=""
# run checks and also initialize global vars
init() {
# OS verification: Linux only
case "$(uname)" in
Linux) ;;
*)
ERROR "Rootless Docker cannot be installed on $(uname)"
exit 1
;;
esac
# User verification: deny running as root
if [ "$(id -u)" = "0" ]; then
ERROR "Refusing to install rootless Docker as the root user"
exit 1
fi
# set BIN
if ! BIN="$(command -v "$DOCKERD_ROOTLESS_SH" 2> /dev/null)"; then
ERROR "$DOCKERD_ROOTLESS_SH needs to be present under \$PATH"
exit 1
fi
BIN=$(dirname "$BIN")
# set SYSTEMD
if systemctl --user show-environment > /dev/null 2>&1; then
SYSTEMD=1
fi
# HOME verification
if [ -z "${HOME:-}" ] || [ ! -d "$HOME" ]; then
ERROR "HOME needs to be set"
exit 1
fi
if [ ! -w "$HOME" ]; then
ERROR "HOME needs to be writable"
exit 1
fi
# set CFG_DIR
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
# Existing rootful docker verification
if [ -w /var/run/docker.sock ] && [ -z "$OPT_FORCE" ]; then
ERROR "Aborting because rootful Docker (/var/run/docker.sock) is running and accessible. Set --force to ignore."
exit 1
fi
# Validate XDG_RUNTIME_DIR and set XDG_RUNTIME_DIR_CREATED
if [ -z "${XDG_RUNTIME_DIR:-}" ] || [ ! -w "$XDG_RUNTIME_DIR" ]; then
if [ -n "$SYSTEMD" ]; then
ERROR "Aborting because systemd was detected but XDG_RUNTIME_DIR (\"$XDG_RUNTIME_DIR\") is not set, does not exist, or is not writable"
ERROR "Hint: this could happen if you changed users with 'su' or 'sudo'. To work around this:"
ERROR "- try again by first running with root privileges 'loginctl enable-linger <user>' where <user> is the unprivileged user and export XDG_RUNTIME_DIR to the value of RuntimePath as shown by 'loginctl show-user <user>'"
ERROR "- or simply log back in as the desired unprivileged user (ssh works for remote machines, machinectl shell works for local machines)"
exit 1
fi
export XDG_RUNTIME_DIR="$HOME/.docker/run"
mkdir -p -m 700 "$XDG_RUNTIME_DIR"
XDG_RUNTIME_DIR_CREATED=1
fi
instructions=""
# instruction: uidmap dependency check
if ! command -v newuidmap > /dev/null 2>&1; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
apt-get install -y uidmap
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
dnf install -y shadow-utils
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
yum install -y shadow-utils
EOI
)
else
ERROR "newuidmap binary not found. Please install with a package manager."
exit 1
fi
fi
# instruction: iptables dependency check
faced_iptables_error=""
if ! command -v iptables > /dev/null 2>&1 && [ ! -f /sbin/iptables ] && [ ! -f /usr/sbin/iptables ]; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
apt-get install -y iptables
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
dnf install -y iptables
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
yum install -y iptables
EOI
)
else
ERROR "iptables binary not found. Please install with a package manager."
exit 1
fi
fi
fi
# instruction: ip_tables module dependency check
if ! grep -q ip_tables /proc/modules 2> /dev/null && ! grep -q ip_tables /lib/modules/$(uname -r)/modules.builtin 2> /dev/null; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Load ip_tables module
modprobe ip_tables
EOI
)
fi
fi
# set DOCKERD_ROOTLESS_SH_FLAGS
if [ -n "$faced_iptables_error" ] && [ -n "$OPT_SKIP_IPTABLES" ]; then
DOCKERD_ROOTLESS_SH_FLAGS="${DOCKERD_ROOTLESS_SH_FLAGS} --iptables=false"
fi
# instruction: Debian and Arch require setting unprivileged_userns_clone
if [ -f /proc/sys/kernel/unprivileged_userns_clone ]; then
if [ "1" != "$(cat /proc/sys/kernel/unprivileged_userns_clone)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set kernel.unprivileged_userns_clone
cat <<EOT > /etc/sysctl.d/50-rootless.conf
kernel.unprivileged_userns_clone = 1
EOT
sysctl --system
EOI
)
fi
fi
# instruction: RHEL/CentOS 7 requires setting max_user_namespaces
if [ -f /proc/sys/user/max_user_namespaces ]; then
if [ "0" = "$(cat /proc/sys/user/max_user_namespaces)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set user.max_user_namespaces
cat <<EOT > /etc/sysctl.d/51-rootless.conf
user.max_user_namespaces = 28633
EOT
sysctl --system
EOI
)
fi
fi
# instructions: validate subuid/subgid files for current user
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subuid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subuid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subuid
EOI
)
fi
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subgid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subgid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subgid
EOI
)
fi
# fail with instructions if requirements are not satisfied.
if [ -n "$instructions" ]; then
ERROR "Missing system requirements. Run the following commands to"
ERROR "install the requirements and run this tool again."
if [ -n "$faced_iptables_error" ] && [ -z "$OPT_SKIP_IPTABLES" ]; then
ERROR "Alternatively iptables checks can be disabled with --skip-iptables ."
fi
echo
echo "########## BEGIN ##########"
echo "sudo sh -eux <<EOF"
echo "$instructions" | sed -e '/^$/d'
echo "EOF"
echo "########## END ##########"
echo
exit 1
fi
# TODO: support printing non-essential but recommended instructions:
# - sysctl: "net.ipv4.ping_group_range"
# - sysctl: "net.ipv4.ip_unprivileged_port_start"
# - external binary: slirp4netns
# - external binary: fuse-overlayfs
}
# CLI subcommand: "check"
cmd_entrypoint_check() {
# requirements are already checked in init()
INFO "Requirements are satisfied"
}
show_systemd_error() {
n="20"
ERROR "Failed to start ${SYSTEMD_UNIT}. Run \`journalctl -n ${n} --no-pager --user --unit ${SYSTEMD_UNIT}\` to show the error log."
ERROR "Before retrying installation, you might need to uninstall the current setup: \`$0 uninstall -f ; ${BIN}/rootlesskit rm -rf ${HOME}/.local/share/docker\`"
if journalctl -q -n ${n} --user --unit ${SYSTEMD_UNIT} | grep -qF "/run/xtables.lock: Permission denied"; then
ERROR "Failure likely related to https://github.com/moby/moby/issues/41230"
ERROR "This may work as a workaround: \`sudo dnf install -y policycoreutils-python-utils && sudo semanage permissive -a iptables_t\`"
fi
}
# install (systemd)
install_systemd() {
mkdir -p "${CFG_DIR}/systemd/user"
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
if [ -f "${unit_file}" ]; then
WARNING "File already exists, skipping: ${unit_file}"
else
INFO "Creating ${unit_file}"
cat <<- EOT > "${unit_file}"
[Unit]
Description=Docker Application Container Engine (Rootless)
Documentation=https://docs.docker.com/engine/security/rootless/
[Service]
Environment=PATH=$BIN:/sbin:/usr/sbin:$PATH
ExecStart=$BIN/dockerd-rootless.sh $DOCKERD_ROOTLESS_SH_FLAGS
ExecReload=/bin/kill -s HUP \$MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
Type=simple
KillMode=mixed
[Install]
WantedBy=default.target
EOT
systemctl --user daemon-reload
fi
if ! systemctl --user --no-pager status "${SYSTEMD_UNIT}" > /dev/null 2>&1; then
INFO "starting systemd service ${SYSTEMD_UNIT}"
(
set -x
if ! systemctl --user start "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
sleep 3
)
fi
(
set -x
if ! systemctl --user --no-pager --full status "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
DOCKER_HOST="unix://$XDG_RUNTIME_DIR/docker.sock" $BIN/docker version
systemctl --user enable "${SYSTEMD_UNIT}"
)
INFO "Installed ${SYSTEMD_UNIT} successfully."
INFO "To control ${SYSTEMD_UNIT}, run: \`systemctl --user (start|stop|restart) ${SYSTEMD_UNIT}\`"
INFO "To run ${SYSTEMD_UNIT} on system startup, run: \`sudo loginctl enable-linger $(id -un)\`"
echo
}
# install (non-systemd)
install_nonsystemd() {
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be started manually:"
echo
echo "PATH=$BIN:/sbin:/usr/sbin:\$PATH ${DOCKERD_ROOTLESS_SH} ${DOCKERD_ROOTLESS_SH_FLAGS}"
echo
}
# CLI subcommand: "install"
cmd_entrypoint_install() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
install_nonsystemd
else
install_systemd
fi
INFO "Make sure the following environment variables are set (or add them to ~/.bashrc):"
echo
if [ -n "$XDG_RUNTIME_DIR_CREATED" ]; then
echo "# WARNING: systemd not found. You have to remove XDG_RUNTIME_DIR manually on every logout."
echo "export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR}"
fi
echo "export PATH=${BIN}:\$PATH"
echo "export DOCKER_HOST=unix://${XDG_RUNTIME_DIR}/docker.sock"
echo
}
# CLI subcommand: "uninstall"
cmd_entrypoint_uninstall() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be stopped manually:"
else
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
(
set -x
systemctl --user stop "${SYSTEMD_UNIT}"
) || :
(
set -x
systemctl --user disable "${SYSTEMD_UNIT}"
) || :
rm -f "${unit_file}"
INFO "Uninstalled ${SYSTEMD_UNIT}"
fi
INFO "This uninstallation tool does NOT remove Docker binaries and data."
INFO "To remove data, run: \`$BIN/rootlesskit rm -rf $HOME/.local/share/docker\`"
}
# text for --help
usage() {
echo "Usage: ${ARG0} [OPTIONS] COMMAND"
echo
echo "A setup tool for Rootless Docker (${DOCKERD_ROOTLESS_SH})."
echo
echo "Documentation: https://docs.docker.com/engine/security/rootless/"
echo
echo "Options:"
echo " -f, --force Ignore rootful Docker (/var/run/docker.sock)"
echo " --skip-iptables Ignore missing iptables"
echo
echo "Commands:"
echo " check Check prerequisites"
echo " install Install systemd unit (if systemd is available) and show how to manage the service"
echo " uninstall Uninstall systemd unit"
}
# parse CLI args
if ! args="$(getopt -o hf --long help,force,skip-iptables -n "$ARG0" -- "$@")"; then
usage
exit 1
fi
eval set -- "$args"
while [ "$#" -gt 0 ]; do
arg="$1"
shift
case "$arg" in
-h | --help)
usage
exit 0
;;
-f | --force)
OPT_FORCE=1
;;
--skip-iptables)
OPT_SKIP_IPTABLES=1
;;
--)
break
;;
*)
# XXX this means we missed something in our "getopt" arguments above!
ERROR "Scripting error, unknown argument '$arg' when parsing script arguments."
exit 1
;;
esac
done
command="${1:-}"
if [ -z "$command" ]; then
ERROR "No command was specified. Run with --help to see the usage. Maybe you want to run \`$ARG0 install\`?"
exit 1
fi
if ! command -v "cmd_entrypoint_${command}" > /dev/null 2>&1; then
ERROR "Unknown command: ${command}. Run with --help to see the usage."
exit 1
fi
# main
init
"cmd_entrypoint_${command}"
| AkihiroSuda | 35c2d1cd3cddb8ec070a05e341f7e1bd847b0aa3 | 3c3a2ff2d421491d0e1462a18d8ac740801c7257 | No, at least for now
| AkihiroSuda | 5,017 |
moby/moby | 41,947 | rootless: prevent the service hanging when stopping (set systemd KillMode to mixed) |
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Fix #41944 ("Docker rootless does not exit properly if containers are running")
Now `systemctl --user stop docker` completes just with in 1 or 2 seconds.
**- How I did it**
Changed the KillMode from "control-group" (default) to "mixed"
See systemd.kill(5) https://www.freedesktop.org/software/systemd/man/systemd.kill.html
> Specifies how processes of this unit shall be killed. One of control-group, mixed, process, none.
> If set to control-group, all remaining processes in the control group of this unit will be killed on unit stop (for services: after the stop command is executed, as configured with ExecStop=). If set to mixed, the SIGTERM signal (see below) is sent to the main process while the subsequent SIGKILL signal (see below) is sent to all remaining processes of the unit's control group. If set to process, only the main process itself is killed (not recommended!). If set to none, no process is killed (strongly recommended against!). In this case, only the stop command will be executed on unit stop, but no process will be killed otherwise. Processes remaining alive after stop are left in their control group and the control group continues to exist after stop unless empty.
> Note that it is not recommended to set KillMode= to process or even none, as this allows processes to escape the service manager's lifecycle and resource management, and to remain running even while their service is considered stopped and is assumed to not consume any resources.
> Processes will first be terminated via SIGTERM (unless the signal to send is changed via KillSignal= or RestartKillSignal=). Optionally, this is immediately followed by a SIGHUP (if enabled with SendSIGHUP=). If processes still remain after the main process of a unit has exited or the delay configured via the TimeoutStopSec= has passed, the termination request is repeated with the SIGKILL signal or the signal specified via FinalKillSignal= (unless this is disabled via the SendSIGKILL= option). See kill(2) for more information.
> Defaults to control-group.
"mixed" is available since systemd 209 (2014-02-20) https://github.com/systemd/systemd/blob/57353d2909e503e3e5c7e69251ba95a31e1a72ce/NEWS#L9318
**- How to verify it**
Run some containers with rootless, and make sure `systemctl --user stop docker.service` completes in a few seconds.
```bash
$ docker --context=rootless run --name nginx -d -p 8080:80 --restart=always nginx:alpine
$ time systemctl --user stop docker
real 0m1.266s
user 0m0.005s
sys 0m0.000s
```
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: prevent the service hanging when stopping (set systemd KillMode to mixed)
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-28 06:25:42+00:00 | 2021-01-28 21:00:34+00:00 | contrib/dockerd-rootless-setuptool.sh | #!/bin/sh
# dockerd-rootless-setuptool.sh: setup tool for dockerd-rootless.sh
# Needs to be executed as a non-root user.
#
# Typical usage: dockerd-rootless-setuptool.sh install --force
#
# Documentation: https://docs.docker.com/engine/security/rootless/
set -eu
# utility functions
INFO() {
/bin/echo -e "\e[104m\e[97m[INFO]\e[49m\e[39m $@"
}
WARNING() {
/bin/echo >&2 -e "\e[101m\e[97m[WARNING]\e[49m\e[39m $@"
}
ERROR() {
/bin/echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
}
# constants
DOCKERD_ROOTLESS_SH="dockerd-rootless.sh"
SYSTEMD_UNIT="docker.service"
# CLI opt: --force
OPT_FORCE=""
# CLI opt: --skip-iptables
OPT_SKIP_IPTABLES=""
# global vars
ARG0="$0"
DOCKERD_ROOTLESS_SH_FLAGS=""
BIN=""
SYSTEMD=""
CFG_DIR=""
XDG_RUNTIME_DIR_CREATED=""
# run checks and also initialize global vars
init() {
# OS verification: Linux only
case "$(uname)" in
Linux) ;;
*)
ERROR "Rootless Docker cannot be installed on $(uname)"
exit 1
;;
esac
# User verification: deny running as root
if [ "$(id -u)" = "0" ]; then
ERROR "Refusing to install rootless Docker as the root user"
exit 1
fi
# set BIN
if ! BIN="$(command -v "$DOCKERD_ROOTLESS_SH" 2> /dev/null)"; then
ERROR "$DOCKERD_ROOTLESS_SH needs to be present under \$PATH"
exit 1
fi
BIN=$(dirname "$BIN")
# set SYSTEMD
if systemctl --user show-environment > /dev/null 2>&1; then
SYSTEMD=1
fi
# HOME verification
if [ -z "${HOME:-}" ] || [ ! -d "$HOME" ]; then
ERROR "HOME needs to be set"
exit 1
fi
if [ ! -w "$HOME" ]; then
ERROR "HOME needs to be writable"
exit 1
fi
# set CFG_DIR
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
# Existing rootful docker verification
if [ -w /var/run/docker.sock ] && [ -z "$OPT_FORCE" ]; then
ERROR "Aborting because rootful Docker (/var/run/docker.sock) is running and accessible. Set --force to ignore."
exit 1
fi
# Validate XDG_RUNTIME_DIR and set XDG_RUNTIME_DIR_CREATED
if [ -z "${XDG_RUNTIME_DIR:-}" ] || [ ! -w "$XDG_RUNTIME_DIR" ]; then
if [ -n "$SYSTEMD" ]; then
ERROR "Aborting because systemd was detected but XDG_RUNTIME_DIR (\"$XDG_RUNTIME_DIR\") is not set, does not exist, or is not writable"
ERROR "Hint: this could happen if you changed users with 'su' or 'sudo'. To work around this:"
ERROR "- try again by first running with root privileges 'loginctl enable-linger <user>' where <user> is the unprivileged user and export XDG_RUNTIME_DIR to the value of RuntimePath as shown by 'loginctl show-user <user>'"
ERROR "- or simply log back in as the desired unprivileged user (ssh works for remote machines, machinectl shell works for local machines)"
exit 1
fi
export XDG_RUNTIME_DIR="$HOME/.docker/run"
mkdir -p -m 700 "$XDG_RUNTIME_DIR"
XDG_RUNTIME_DIR_CREATED=1
fi
instructions=""
# instruction: uidmap dependency check
if ! command -v newuidmap > /dev/null 2>&1; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
apt-get install -y uidmap
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
dnf install -y shadow-utils
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
yum install -y shadow-utils
EOI
)
else
ERROR "newuidmap binary not found. Please install with a package manager."
exit 1
fi
fi
# instruction: iptables dependency check
faced_iptables_error=""
if ! command -v iptables > /dev/null 2>&1 && [ ! -f /sbin/iptables ] && [ ! -f /usr/sbin/iptables ]; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
apt-get install -y iptables
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
dnf install -y iptables
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
yum install -y iptables
EOI
)
else
ERROR "iptables binary not found. Please install with a package manager."
exit 1
fi
fi
fi
# instruction: ip_tables module dependency check
if ! grep -q ip_tables /proc/modules 2> /dev/null && ! grep -q ip_tables /lib/modules/$(uname -r)/modules.builtin 2> /dev/null; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Load ip_tables module
modprobe ip_tables
EOI
)
fi
fi
# set DOCKERD_ROOTLESS_SH_FLAGS
if [ -n "$faced_iptables_error" ] && [ -n "$OPT_SKIP_IPTABLES" ]; then
DOCKERD_ROOTLESS_SH_FLAGS="${DOCKERD_ROOTLESS_SH_FLAGS} --iptables=false"
fi
# instruction: Debian and Arch require setting unprivileged_userns_clone
if [ -f /proc/sys/kernel/unprivileged_userns_clone ]; then
if [ "1" != "$(cat /proc/sys/kernel/unprivileged_userns_clone)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set kernel.unprivileged_userns_clone
cat <<EOT > /etc/sysctl.d/50-rootless.conf
kernel.unprivileged_userns_clone = 1
EOT
sysctl --system
EOI
)
fi
fi
# instruction: RHEL/CentOS 7 requires setting max_user_namespaces
if [ -f /proc/sys/user/max_user_namespaces ]; then
if [ "0" = "$(cat /proc/sys/user/max_user_namespaces)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set user.max_user_namespaces
cat <<EOT > /etc/sysctl.d/51-rootless.conf
user.max_user_namespaces = 28633
EOT
sysctl --system
EOI
)
fi
fi
# instructions: validate subuid/subgid files for current user
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subuid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subuid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subuid
EOI
)
fi
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subgid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subgid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subgid
EOI
)
fi
# fail with instructions if requirements are not satisfied.
if [ -n "$instructions" ]; then
ERROR "Missing system requirements. Run the following commands to"
ERROR "install the requirements and run this tool again."
if [ -n "$faced_iptables_error" ] && [ -z "$OPT_SKIP_IPTABLES" ]; then
ERROR "Alternatively iptables checks can be disabled with --skip-iptables ."
fi
echo
echo "########## BEGIN ##########"
echo "sudo sh -eux <<EOF"
echo "$instructions" | sed -e '/^$/d'
echo "EOF"
echo "########## END ##########"
echo
exit 1
fi
# TODO: support printing non-essential but recommended instructions:
# - sysctl: "net.ipv4.ping_group_range"
# - sysctl: "net.ipv4.ip_unprivileged_port_start"
# - external binary: slirp4netns
# - external binary: fuse-overlayfs
}
# CLI subcommand: "check"
cmd_entrypoint_check() {
# requirements are already checked in init()
INFO "Requirements are satisfied"
}
show_systemd_error() {
n="20"
ERROR "Failed to start ${SYSTEMD_UNIT}. Run \`journalctl -n ${n} --no-pager --user --unit ${SYSTEMD_UNIT}\` to show the error log."
ERROR "Before retrying installation, you might need to uninstall the current setup: \`$0 uninstall -f ; ${BIN}/rootlesskit rm -rf ${HOME}/.local/share/docker\`"
if journalctl -q -n ${n} --user --unit ${SYSTEMD_UNIT} | grep -qF "/run/xtables.lock: Permission denied"; then
ERROR "Failure likely related to https://github.com/moby/moby/issues/41230"
ERROR "This may work as a workaround: \`sudo dnf install -y policycoreutils-python-utils && sudo semanage permissive -a iptables_t\`"
fi
}
# install (systemd)
install_systemd() {
mkdir -p "${CFG_DIR}/systemd/user"
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
if [ -f "${unit_file}" ]; then
WARNING "File already exists, skipping: ${unit_file}"
else
INFO "Creating ${unit_file}"
cat <<- EOT > "${unit_file}"
[Unit]
Description=Docker Application Container Engine (Rootless)
Documentation=https://docs.docker.com/engine/security/rootless/
[Service]
Environment=PATH=$BIN:/sbin:/usr/sbin:$PATH
ExecStart=$BIN/dockerd-rootless.sh $DOCKERD_ROOTLESS_SH_FLAGS
ExecReload=/bin/kill -s HUP \$MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
Type=simple
[Install]
WantedBy=default.target
EOT
systemctl --user daemon-reload
fi
if ! systemctl --user --no-pager status "${SYSTEMD_UNIT}" > /dev/null 2>&1; then
INFO "starting systemd service ${SYSTEMD_UNIT}"
(
set -x
if ! systemctl --user start "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
sleep 3
)
fi
(
set -x
if ! systemctl --user --no-pager --full status "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
DOCKER_HOST="unix://$XDG_RUNTIME_DIR/docker.sock" $BIN/docker version
systemctl --user enable "${SYSTEMD_UNIT}"
)
INFO "Installed ${SYSTEMD_UNIT} successfully."
INFO "To control ${SYSTEMD_UNIT}, run: \`systemctl --user (start|stop|restart) ${SYSTEMD_UNIT}\`"
INFO "To run ${SYSTEMD_UNIT} on system startup, run: \`sudo loginctl enable-linger $(id -un)\`"
echo
}
# install (non-systemd)
install_nonsystemd() {
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be started manually:"
echo
echo "PATH=$BIN:/sbin:/usr/sbin:\$PATH ${DOCKERD_ROOTLESS_SH} ${DOCKERD_ROOTLESS_SH_FLAGS}"
echo
}
# CLI subcommand: "install"
cmd_entrypoint_install() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
install_nonsystemd
else
install_systemd
fi
INFO "Make sure the following environment variables are set (or add them to ~/.bashrc):"
echo
if [ -n "$XDG_RUNTIME_DIR_CREATED" ]; then
echo "# WARNING: systemd not found. You have to remove XDG_RUNTIME_DIR manually on every logout."
echo "export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR}"
fi
echo "export PATH=${BIN}:\$PATH"
echo "export DOCKER_HOST=unix://${XDG_RUNTIME_DIR}/docker.sock"
echo
}
# CLI subcommand: "uninstall"
cmd_entrypoint_uninstall() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be stopped manually:"
else
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
(
set -x
systemctl --user stop "${SYSTEMD_UNIT}"
) || :
(
set -x
systemctl --user disable "${SYSTEMD_UNIT}"
) || :
rm -f "${unit_file}"
INFO "Uninstalled ${SYSTEMD_UNIT}"
fi
INFO "This uninstallation tool does NOT remove Docker binaries and data."
INFO "To remove data, run: \`$BIN/rootlesskit rm -rf $HOME/.local/share/docker\`"
}
# text for --help
usage() {
echo "Usage: ${ARG0} [OPTIONS] COMMAND"
echo
echo "A setup tool for Rootless Docker (${DOCKERD_ROOTLESS_SH})."
echo
echo "Documentation: https://docs.docker.com/engine/security/rootless/"
echo
echo "Options:"
echo " -f, --force Ignore rootful Docker (/var/run/docker.sock)"
echo " --skip-iptables Ignore missing iptables"
echo
echo "Commands:"
echo " check Check prerequisites"
echo " install Install systemd unit (if systemd is available) and show how to manage the service"
echo " uninstall Uninstall systemd unit"
}
# parse CLI args
if ! args="$(getopt -o hf --long help,force,skip-iptables -n "$ARG0" -- "$@")"; then
usage
exit 1
fi
eval set -- "$args"
while [ "$#" -gt 0 ]; do
arg="$1"
shift
case "$arg" in
-h | --help)
usage
exit 0
;;
-f | --force)
OPT_FORCE=1
;;
--skip-iptables)
OPT_SKIP_IPTABLES=1
;;
--)
break
;;
*)
# XXX this means we missed something in our "getopt" arguments above!
ERROR "Scripting error, unknown argument '$arg' when parsing script arguments."
exit 1
;;
esac
done
command="${1:-}"
if [ -z "$command" ]; then
ERROR "No command was specified. Run with --help to see the usage. Maybe you want to run \`$ARG0 install\`?"
exit 1
fi
if ! command -v "cmd_entrypoint_${command}" > /dev/null 2>&1; then
ERROR "Unknown command: ${command}. Run with --help to see the usage."
exit 1
fi
# main
init
"cmd_entrypoint_${command}"
| #!/bin/sh
# dockerd-rootless-setuptool.sh: setup tool for dockerd-rootless.sh
# Needs to be executed as a non-root user.
#
# Typical usage: dockerd-rootless-setuptool.sh install --force
#
# Documentation: https://docs.docker.com/engine/security/rootless/
set -eu
# utility functions
INFO() {
/bin/echo -e "\e[104m\e[97m[INFO]\e[49m\e[39m $@"
}
WARNING() {
/bin/echo >&2 -e "\e[101m\e[97m[WARNING]\e[49m\e[39m $@"
}
ERROR() {
/bin/echo >&2 -e "\e[101m\e[97m[ERROR]\e[49m\e[39m $@"
}
# constants
DOCKERD_ROOTLESS_SH="dockerd-rootless.sh"
SYSTEMD_UNIT="docker.service"
# CLI opt: --force
OPT_FORCE=""
# CLI opt: --skip-iptables
OPT_SKIP_IPTABLES=""
# global vars
ARG0="$0"
DOCKERD_ROOTLESS_SH_FLAGS=""
BIN=""
SYSTEMD=""
CFG_DIR=""
XDG_RUNTIME_DIR_CREATED=""
# run checks and also initialize global vars
init() {
# OS verification: Linux only
case "$(uname)" in
Linux) ;;
*)
ERROR "Rootless Docker cannot be installed on $(uname)"
exit 1
;;
esac
# User verification: deny running as root
if [ "$(id -u)" = "0" ]; then
ERROR "Refusing to install rootless Docker as the root user"
exit 1
fi
# set BIN
if ! BIN="$(command -v "$DOCKERD_ROOTLESS_SH" 2> /dev/null)"; then
ERROR "$DOCKERD_ROOTLESS_SH needs to be present under \$PATH"
exit 1
fi
BIN=$(dirname "$BIN")
# set SYSTEMD
if systemctl --user show-environment > /dev/null 2>&1; then
SYSTEMD=1
fi
# HOME verification
if [ -z "${HOME:-}" ] || [ ! -d "$HOME" ]; then
ERROR "HOME needs to be set"
exit 1
fi
if [ ! -w "$HOME" ]; then
ERROR "HOME needs to be writable"
exit 1
fi
# set CFG_DIR
CFG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}"
# Existing rootful docker verification
if [ -w /var/run/docker.sock ] && [ -z "$OPT_FORCE" ]; then
ERROR "Aborting because rootful Docker (/var/run/docker.sock) is running and accessible. Set --force to ignore."
exit 1
fi
# Validate XDG_RUNTIME_DIR and set XDG_RUNTIME_DIR_CREATED
if [ -z "${XDG_RUNTIME_DIR:-}" ] || [ ! -w "$XDG_RUNTIME_DIR" ]; then
if [ -n "$SYSTEMD" ]; then
ERROR "Aborting because systemd was detected but XDG_RUNTIME_DIR (\"$XDG_RUNTIME_DIR\") is not set, does not exist, or is not writable"
ERROR "Hint: this could happen if you changed users with 'su' or 'sudo'. To work around this:"
ERROR "- try again by first running with root privileges 'loginctl enable-linger <user>' where <user> is the unprivileged user and export XDG_RUNTIME_DIR to the value of RuntimePath as shown by 'loginctl show-user <user>'"
ERROR "- or simply log back in as the desired unprivileged user (ssh works for remote machines, machinectl shell works for local machines)"
exit 1
fi
export XDG_RUNTIME_DIR="$HOME/.docker/run"
mkdir -p -m 700 "$XDG_RUNTIME_DIR"
XDG_RUNTIME_DIR_CREATED=1
fi
instructions=""
# instruction: uidmap dependency check
if ! command -v newuidmap > /dev/null 2>&1; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
apt-get install -y uidmap
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
dnf install -y shadow-utils
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install newuidmap & newgidmap binaries
yum install -y shadow-utils
EOI
)
else
ERROR "newuidmap binary not found. Please install with a package manager."
exit 1
fi
fi
# instruction: iptables dependency check
faced_iptables_error=""
if ! command -v iptables > /dev/null 2>&1 && [ ! -f /sbin/iptables ] && [ ! -f /usr/sbin/iptables ]; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
if command -v apt-get > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
apt-get install -y iptables
EOI
)
elif command -v dnf > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
dnf install -y iptables
EOI
)
elif command -v yum > /dev/null 2>&1; then
instructions=$(
cat <<- EOI
${instructions}
# Install iptables
yum install -y iptables
EOI
)
else
ERROR "iptables binary not found. Please install with a package manager."
exit 1
fi
fi
fi
# instruction: ip_tables module dependency check
if ! grep -q ip_tables /proc/modules 2> /dev/null && ! grep -q ip_tables /lib/modules/$(uname -r)/modules.builtin 2> /dev/null; then
faced_iptables_error=1
if [ -z "$OPT_SKIP_IPTABLES" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Load ip_tables module
modprobe ip_tables
EOI
)
fi
fi
# set DOCKERD_ROOTLESS_SH_FLAGS
if [ -n "$faced_iptables_error" ] && [ -n "$OPT_SKIP_IPTABLES" ]; then
DOCKERD_ROOTLESS_SH_FLAGS="${DOCKERD_ROOTLESS_SH_FLAGS} --iptables=false"
fi
# instruction: Debian and Arch require setting unprivileged_userns_clone
if [ -f /proc/sys/kernel/unprivileged_userns_clone ]; then
if [ "1" != "$(cat /proc/sys/kernel/unprivileged_userns_clone)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set kernel.unprivileged_userns_clone
cat <<EOT > /etc/sysctl.d/50-rootless.conf
kernel.unprivileged_userns_clone = 1
EOT
sysctl --system
EOI
)
fi
fi
# instruction: RHEL/CentOS 7 requires setting max_user_namespaces
if [ -f /proc/sys/user/max_user_namespaces ]; then
if [ "0" = "$(cat /proc/sys/user/max_user_namespaces)" ]; then
instructions=$(
cat <<- EOI
${instructions}
# Set user.max_user_namespaces
cat <<EOT > /etc/sysctl.d/51-rootless.conf
user.max_user_namespaces = 28633
EOT
sysctl --system
EOI
)
fi
fi
# instructions: validate subuid/subgid files for current user
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subuid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subuid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subuid
EOI
)
fi
if ! grep -q "^$(id -un):\|^$(id -u):" /etc/subgid 2> /dev/null; then
instructions=$(
cat <<- EOI
${instructions}
# Add subgid entry for $(id -un)
echo "$(id -un):100000:65536" >> /etc/subgid
EOI
)
fi
# fail with instructions if requirements are not satisfied.
if [ -n "$instructions" ]; then
ERROR "Missing system requirements. Run the following commands to"
ERROR "install the requirements and run this tool again."
if [ -n "$faced_iptables_error" ] && [ -z "$OPT_SKIP_IPTABLES" ]; then
ERROR "Alternatively iptables checks can be disabled with --skip-iptables ."
fi
echo
echo "########## BEGIN ##########"
echo "sudo sh -eux <<EOF"
echo "$instructions" | sed -e '/^$/d'
echo "EOF"
echo "########## END ##########"
echo
exit 1
fi
# TODO: support printing non-essential but recommended instructions:
# - sysctl: "net.ipv4.ping_group_range"
# - sysctl: "net.ipv4.ip_unprivileged_port_start"
# - external binary: slirp4netns
# - external binary: fuse-overlayfs
}
# CLI subcommand: "check"
cmd_entrypoint_check() {
# requirements are already checked in init()
INFO "Requirements are satisfied"
}
show_systemd_error() {
n="20"
ERROR "Failed to start ${SYSTEMD_UNIT}. Run \`journalctl -n ${n} --no-pager --user --unit ${SYSTEMD_UNIT}\` to show the error log."
ERROR "Before retrying installation, you might need to uninstall the current setup: \`$0 uninstall -f ; ${BIN}/rootlesskit rm -rf ${HOME}/.local/share/docker\`"
if journalctl -q -n ${n} --user --unit ${SYSTEMD_UNIT} | grep -qF "/run/xtables.lock: Permission denied"; then
ERROR "Failure likely related to https://github.com/moby/moby/issues/41230"
ERROR "This may work as a workaround: \`sudo dnf install -y policycoreutils-python-utils && sudo semanage permissive -a iptables_t\`"
fi
}
# install (systemd)
install_systemd() {
mkdir -p "${CFG_DIR}/systemd/user"
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
if [ -f "${unit_file}" ]; then
WARNING "File already exists, skipping: ${unit_file}"
else
INFO "Creating ${unit_file}"
cat <<- EOT > "${unit_file}"
[Unit]
Description=Docker Application Container Engine (Rootless)
Documentation=https://docs.docker.com/engine/security/rootless/
[Service]
Environment=PATH=$BIN:/sbin:/usr/sbin:$PATH
ExecStart=$BIN/dockerd-rootless.sh $DOCKERD_ROOTLESS_SH_FLAGS
ExecReload=/bin/kill -s HUP \$MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
Type=simple
KillMode=mixed
[Install]
WantedBy=default.target
EOT
systemctl --user daemon-reload
fi
if ! systemctl --user --no-pager status "${SYSTEMD_UNIT}" > /dev/null 2>&1; then
INFO "starting systemd service ${SYSTEMD_UNIT}"
(
set -x
if ! systemctl --user start "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
sleep 3
)
fi
(
set -x
if ! systemctl --user --no-pager --full status "${SYSTEMD_UNIT}"; then
set +x
show_systemd_error
exit 1
fi
DOCKER_HOST="unix://$XDG_RUNTIME_DIR/docker.sock" $BIN/docker version
systemctl --user enable "${SYSTEMD_UNIT}"
)
INFO "Installed ${SYSTEMD_UNIT} successfully."
INFO "To control ${SYSTEMD_UNIT}, run: \`systemctl --user (start|stop|restart) ${SYSTEMD_UNIT}\`"
INFO "To run ${SYSTEMD_UNIT} on system startup, run: \`sudo loginctl enable-linger $(id -un)\`"
echo
}
# install (non-systemd)
install_nonsystemd() {
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be started manually:"
echo
echo "PATH=$BIN:/sbin:/usr/sbin:\$PATH ${DOCKERD_ROOTLESS_SH} ${DOCKERD_ROOTLESS_SH_FLAGS}"
echo
}
# CLI subcommand: "install"
cmd_entrypoint_install() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
install_nonsystemd
else
install_systemd
fi
INFO "Make sure the following environment variables are set (or add them to ~/.bashrc):"
echo
if [ -n "$XDG_RUNTIME_DIR_CREATED" ]; then
echo "# WARNING: systemd not found. You have to remove XDG_RUNTIME_DIR manually on every logout."
echo "export XDG_RUNTIME_DIR=${XDG_RUNTIME_DIR}"
fi
echo "export PATH=${BIN}:\$PATH"
echo "export DOCKER_HOST=unix://${XDG_RUNTIME_DIR}/docker.sock"
echo
}
# CLI subcommand: "uninstall"
cmd_entrypoint_uninstall() {
# requirements are already checked in init()
if [ -z "$SYSTEMD" ]; then
INFO "systemd not detected, ${DOCKERD_ROOTLESS_SH} needs to be stopped manually:"
else
unit_file="${CFG_DIR}/systemd/user/${SYSTEMD_UNIT}"
(
set -x
systemctl --user stop "${SYSTEMD_UNIT}"
) || :
(
set -x
systemctl --user disable "${SYSTEMD_UNIT}"
) || :
rm -f "${unit_file}"
INFO "Uninstalled ${SYSTEMD_UNIT}"
fi
INFO "This uninstallation tool does NOT remove Docker binaries and data."
INFO "To remove data, run: \`$BIN/rootlesskit rm -rf $HOME/.local/share/docker\`"
}
# text for --help
usage() {
echo "Usage: ${ARG0} [OPTIONS] COMMAND"
echo
echo "A setup tool for Rootless Docker (${DOCKERD_ROOTLESS_SH})."
echo
echo "Documentation: https://docs.docker.com/engine/security/rootless/"
echo
echo "Options:"
echo " -f, --force Ignore rootful Docker (/var/run/docker.sock)"
echo " --skip-iptables Ignore missing iptables"
echo
echo "Commands:"
echo " check Check prerequisites"
echo " install Install systemd unit (if systemd is available) and show how to manage the service"
echo " uninstall Uninstall systemd unit"
}
# parse CLI args
if ! args="$(getopt -o hf --long help,force,skip-iptables -n "$ARG0" -- "$@")"; then
usage
exit 1
fi
eval set -- "$args"
while [ "$#" -gt 0 ]; do
arg="$1"
shift
case "$arg" in
-h | --help)
usage
exit 0
;;
-f | --force)
OPT_FORCE=1
;;
--skip-iptables)
OPT_SKIP_IPTABLES=1
;;
--)
break
;;
*)
# XXX this means we missed something in our "getopt" arguments above!
ERROR "Scripting error, unknown argument '$arg' when parsing script arguments."
exit 1
;;
esac
done
command="${1:-}"
if [ -z "$command" ]; then
ERROR "No command was specified. Run with --help to see the usage. Maybe you want to run \`$ARG0 install\`?"
exit 1
fi
if ! command -v "cmd_entrypoint_${command}" > /dev/null 2>&1; then
ERROR "Unknown command: ${command}. Run with --help to see the usage."
exit 1
fi
# main
init
"cmd_entrypoint_${command}"
| AkihiroSuda | 35c2d1cd3cddb8ec070a05e341f7e1bd847b0aa3 | 3c3a2ff2d421491d0e1462a18d8ac740801c7257 | "process" does seem more correct eventually, but mixed sounds good for now :+1: | tianon | 5,018 |
moby/moby | 41,936 | [testing] fix TestBuildUserNamespaceValidateCapabilitiesAreV2 failures | relates to https://github.com/moby/moby/pull/41925#issuecomment-767522877
relates to https://github.com/moby/moby/pull/41927#issuecomment-767370162
<!--
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"closes #xxxx"
Please provide the following information:
-->
**- What I did**
**- How I did it**
**- How to verify it**
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-26 14:30:32+00:00 | 2021-02-16 17:39:19+00:00 | integration/build/build_userns_linux_test.go | package build // import "github.com/docker/docker/integration/build"
import (
"bufio"
"bytes"
"context"
"io"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/testutil/daemon"
"github.com/docker/docker/testutil/fakecontext"
"github.com/docker/docker/testutil/fixtures/load"
"gotest.tools/v3/assert"
"gotest.tools/v3/skip"
)
// Implements a test for https://github.com/moby/moby/issues/41723
// Images built in a user-namespaced daemon should have capabilities serialised in
// VFS_CAP_REVISION_2 (no user-namespace root uid) format rather than V3 (that includes
// the root uid).
func TestBuildUserNamespaceValidateCapabilitiesAreV2(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !testEnv.IsUserNamespaceInKernel())
skip.If(t, testEnv.IsRootless())
const imageTag = "capabilities:1.0"
tmp, err := ioutil.TempDir("", "integration-")
assert.NilError(t, err)
defer os.RemoveAll(tmp)
dUserRemap := daemon.New(t)
dUserRemap.Start(t, "--userns-remap", "default")
ctx := context.Background()
clientUserRemap := dUserRemap.NewClientT(t)
err = load.FrozenImagesLinux(clientUserRemap, "buildpack-deps:buster")
assert.NilError(t, err)
dUserRemapRunning := true
defer func() {
if dUserRemapRunning {
dUserRemap.Stop(t)
}
}()
dockerfile := `
FROM debian:bullseye
RUN setcap CAP_NET_BIND_SERVICE=+eip /bin/sleep
`
source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
defer source.Close()
resp, err := clientUserRemap.ImageBuild(ctx,
source.AsTarReader(t),
types.ImageBuildOptions{
Tags: []string{imageTag},
})
assert.NilError(t, err)
defer resp.Body.Close()
buf := make([]byte, 1024)
for {
n, err := resp.Body.Read(buf)
if err != nil && err != io.EOF {
t.Fatalf("Error reading ImageBuild response: %v", err)
break
}
if n == 0 {
break
}
}
reader, err := clientUserRemap.ImageSave(ctx, []string{imageTag})
assert.NilError(t, err, "failed to download capabilities image")
defer reader.Close()
tar, err := os.Create(tmp + "/image.tar")
assert.NilError(t, err, "failed to create image tar file")
defer tar.Close()
_, err = io.Copy(tar, reader)
assert.NilError(t, err, "failed to write image tar file")
dUserRemap.Stop(t)
dUserRemap.Cleanup(t)
dUserRemapRunning = false
dNoUserRemap := daemon.New(t)
dNoUserRemap.Start(t)
defer dNoUserRemap.Stop(t)
clientNoUserRemap := dNoUserRemap.NewClientT(t)
tarFile, err := os.Open(tmp + "/image.tar")
assert.NilError(t, err, "failed to open image tar file")
tarReader := bufio.NewReader(tarFile)
loadResp, err := clientNoUserRemap.ImageLoad(ctx, tarReader, false)
assert.NilError(t, err, "failed to load image tar file")
defer loadResp.Body.Close()
for {
n, err := loadResp.Body.Read(buf)
if err != nil && err != io.EOF {
t.Fatalf("Error reading ImageLoad response: %v", err)
break
}
if n == 0 {
break
}
}
cid := container.Run(ctx, t, clientNoUserRemap,
container.WithImage(imageTag),
container.WithCmd("/sbin/getcap", "-n", "/bin/sleep"),
)
logReader, err := clientNoUserRemap.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
ShowStdout: true,
})
assert.NilError(t, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, logReader)
assert.NilError(t, err)
if strings.TrimSpace(actualStdout.String()) != "/bin/sleep cap_net_bind_service=eip" {
t.Fatalf("run produced invalid output: %q, expected %q", actualStdout.String(), "/bin/sleep cap_net_bind_service=eip")
}
}
| package build // import "github.com/docker/docker/integration/build"
import (
"bufio"
"bytes"
"context"
"io"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/testutil/daemon"
"github.com/docker/docker/testutil/fakecontext"
"github.com/docker/docker/testutil/fixtures/load"
"gotest.tools/v3/assert"
"gotest.tools/v3/skip"
)
// Implements a test for https://github.com/moby/moby/issues/41723
// Images built in a user-namespaced daemon should have capabilities serialised in
// VFS_CAP_REVISION_2 (no user-namespace root uid) format rather than V3 (that includes
// the root uid).
func TestBuildUserNamespaceValidateCapabilitiesAreV2(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !testEnv.IsUserNamespaceInKernel())
skip.If(t, testEnv.IsRootless())
const imageTag = "capabilities:1.0"
tmp, err := ioutil.TempDir("", "integration-")
assert.NilError(t, err)
defer os.RemoveAll(tmp)
dUserRemap := daemon.New(t)
dUserRemap.Start(t, "--userns-remap", "default")
ctx := context.Background()
clientUserRemap := dUserRemap.NewClientT(t)
err = load.FrozenImagesLinux(clientUserRemap, "debian:bullseye")
assert.NilError(t, err)
dUserRemapRunning := true
defer func() {
if dUserRemapRunning {
dUserRemap.Stop(t)
}
}()
dockerfile := `
FROM debian:bullseye
RUN setcap CAP_NET_BIND_SERVICE=+eip /bin/sleep
`
source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
defer source.Close()
resp, err := clientUserRemap.ImageBuild(ctx,
source.AsTarReader(t),
types.ImageBuildOptions{
Tags: []string{imageTag},
})
assert.NilError(t, err)
defer resp.Body.Close()
buf := bytes.NewBuffer(nil)
err = jsonmessage.DisplayJSONMessagesStream(resp.Body, buf, 0, false, nil)
assert.NilError(t, err)
reader, err := clientUserRemap.ImageSave(ctx, []string{imageTag})
assert.NilError(t, err, "failed to download capabilities image")
defer reader.Close()
tar, err := os.Create(tmp + "/image.tar")
assert.NilError(t, err, "failed to create image tar file")
defer tar.Close()
_, err = io.Copy(tar, reader)
assert.NilError(t, err, "failed to write image tar file")
dUserRemap.Stop(t)
dUserRemap.Cleanup(t)
dUserRemapRunning = false
dNoUserRemap := daemon.New(t)
dNoUserRemap.Start(t)
defer dNoUserRemap.Stop(t)
clientNoUserRemap := dNoUserRemap.NewClientT(t)
tarFile, err := os.Open(tmp + "/image.tar")
assert.NilError(t, err, "failed to open image tar file")
tarReader := bufio.NewReader(tarFile)
loadResp, err := clientNoUserRemap.ImageLoad(ctx, tarReader, false)
assert.NilError(t, err, "failed to load image tar file")
defer loadResp.Body.Close()
buf = bytes.NewBuffer(nil)
err = jsonmessage.DisplayJSONMessagesStream(loadResp.Body, buf, 0, false, nil)
assert.NilError(t, err)
cid := container.Run(ctx, t, clientNoUserRemap,
container.WithImage(imageTag),
container.WithCmd("/sbin/getcap", "-n", "/bin/sleep"),
)
logReader, err := clientNoUserRemap.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
ShowStdout: true,
})
assert.NilError(t, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, logReader)
assert.NilError(t, err)
if strings.TrimSpace(actualStdout.String()) != "/bin/sleep cap_net_bind_service=eip" {
t.Fatalf("run produced invalid output: %q, expected %q", actualStdout.String(), "/bin/sleep cap_net_bind_service=eip")
}
}
| thaJeztah | 2834afe4268fd85f4a12e997855e2acac6e9ab45 | 3d966826874e3ecb00f2b49422faff050c61e8f8 | After discussing with @tonistiigi @tiborvass - updated this to use jsonmessage to detect errors (instead of checking for "Successfully built"
Possibly there's other tests that have this same issue (so something to look into in a follow-up) | thaJeztah | 5,019 |
moby/moby | 41,936 | [testing] fix TestBuildUserNamespaceValidateCapabilitiesAreV2 failures | relates to https://github.com/moby/moby/pull/41925#issuecomment-767522877
relates to https://github.com/moby/moby/pull/41927#issuecomment-767370162
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
**- How I did it**
**- How to verify it**
**- Description for the changelog**
<!--
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pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-26 14:30:32+00:00 | 2021-02-16 17:39:19+00:00 | integration/build/build_userns_linux_test.go | package build // import "github.com/docker/docker/integration/build"
import (
"bufio"
"bytes"
"context"
"io"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/testutil/daemon"
"github.com/docker/docker/testutil/fakecontext"
"github.com/docker/docker/testutil/fixtures/load"
"gotest.tools/v3/assert"
"gotest.tools/v3/skip"
)
// Implements a test for https://github.com/moby/moby/issues/41723
// Images built in a user-namespaced daemon should have capabilities serialised in
// VFS_CAP_REVISION_2 (no user-namespace root uid) format rather than V3 (that includes
// the root uid).
func TestBuildUserNamespaceValidateCapabilitiesAreV2(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !testEnv.IsUserNamespaceInKernel())
skip.If(t, testEnv.IsRootless())
const imageTag = "capabilities:1.0"
tmp, err := ioutil.TempDir("", "integration-")
assert.NilError(t, err)
defer os.RemoveAll(tmp)
dUserRemap := daemon.New(t)
dUserRemap.Start(t, "--userns-remap", "default")
ctx := context.Background()
clientUserRemap := dUserRemap.NewClientT(t)
err = load.FrozenImagesLinux(clientUserRemap, "buildpack-deps:buster")
assert.NilError(t, err)
dUserRemapRunning := true
defer func() {
if dUserRemapRunning {
dUserRemap.Stop(t)
}
}()
dockerfile := `
FROM debian:bullseye
RUN setcap CAP_NET_BIND_SERVICE=+eip /bin/sleep
`
source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
defer source.Close()
resp, err := clientUserRemap.ImageBuild(ctx,
source.AsTarReader(t),
types.ImageBuildOptions{
Tags: []string{imageTag},
})
assert.NilError(t, err)
defer resp.Body.Close()
buf := make([]byte, 1024)
for {
n, err := resp.Body.Read(buf)
if err != nil && err != io.EOF {
t.Fatalf("Error reading ImageBuild response: %v", err)
break
}
if n == 0 {
break
}
}
reader, err := clientUserRemap.ImageSave(ctx, []string{imageTag})
assert.NilError(t, err, "failed to download capabilities image")
defer reader.Close()
tar, err := os.Create(tmp + "/image.tar")
assert.NilError(t, err, "failed to create image tar file")
defer tar.Close()
_, err = io.Copy(tar, reader)
assert.NilError(t, err, "failed to write image tar file")
dUserRemap.Stop(t)
dUserRemap.Cleanup(t)
dUserRemapRunning = false
dNoUserRemap := daemon.New(t)
dNoUserRemap.Start(t)
defer dNoUserRemap.Stop(t)
clientNoUserRemap := dNoUserRemap.NewClientT(t)
tarFile, err := os.Open(tmp + "/image.tar")
assert.NilError(t, err, "failed to open image tar file")
tarReader := bufio.NewReader(tarFile)
loadResp, err := clientNoUserRemap.ImageLoad(ctx, tarReader, false)
assert.NilError(t, err, "failed to load image tar file")
defer loadResp.Body.Close()
for {
n, err := loadResp.Body.Read(buf)
if err != nil && err != io.EOF {
t.Fatalf("Error reading ImageLoad response: %v", err)
break
}
if n == 0 {
break
}
}
cid := container.Run(ctx, t, clientNoUserRemap,
container.WithImage(imageTag),
container.WithCmd("/sbin/getcap", "-n", "/bin/sleep"),
)
logReader, err := clientNoUserRemap.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
ShowStdout: true,
})
assert.NilError(t, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, logReader)
assert.NilError(t, err)
if strings.TrimSpace(actualStdout.String()) != "/bin/sleep cap_net_bind_service=eip" {
t.Fatalf("run produced invalid output: %q, expected %q", actualStdout.String(), "/bin/sleep cap_net_bind_service=eip")
}
}
| package build // import "github.com/docker/docker/integration/build"
import (
"bufio"
"bytes"
"context"
"io"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/testutil/daemon"
"github.com/docker/docker/testutil/fakecontext"
"github.com/docker/docker/testutil/fixtures/load"
"gotest.tools/v3/assert"
"gotest.tools/v3/skip"
)
// Implements a test for https://github.com/moby/moby/issues/41723
// Images built in a user-namespaced daemon should have capabilities serialised in
// VFS_CAP_REVISION_2 (no user-namespace root uid) format rather than V3 (that includes
// the root uid).
func TestBuildUserNamespaceValidateCapabilitiesAreV2(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !testEnv.IsUserNamespaceInKernel())
skip.If(t, testEnv.IsRootless())
const imageTag = "capabilities:1.0"
tmp, err := ioutil.TempDir("", "integration-")
assert.NilError(t, err)
defer os.RemoveAll(tmp)
dUserRemap := daemon.New(t)
dUserRemap.Start(t, "--userns-remap", "default")
ctx := context.Background()
clientUserRemap := dUserRemap.NewClientT(t)
err = load.FrozenImagesLinux(clientUserRemap, "debian:bullseye")
assert.NilError(t, err)
dUserRemapRunning := true
defer func() {
if dUserRemapRunning {
dUserRemap.Stop(t)
}
}()
dockerfile := `
FROM debian:bullseye
RUN setcap CAP_NET_BIND_SERVICE=+eip /bin/sleep
`
source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
defer source.Close()
resp, err := clientUserRemap.ImageBuild(ctx,
source.AsTarReader(t),
types.ImageBuildOptions{
Tags: []string{imageTag},
})
assert.NilError(t, err)
defer resp.Body.Close()
buf := bytes.NewBuffer(nil)
err = jsonmessage.DisplayJSONMessagesStream(resp.Body, buf, 0, false, nil)
assert.NilError(t, err)
reader, err := clientUserRemap.ImageSave(ctx, []string{imageTag})
assert.NilError(t, err, "failed to download capabilities image")
defer reader.Close()
tar, err := os.Create(tmp + "/image.tar")
assert.NilError(t, err, "failed to create image tar file")
defer tar.Close()
_, err = io.Copy(tar, reader)
assert.NilError(t, err, "failed to write image tar file")
dUserRemap.Stop(t)
dUserRemap.Cleanup(t)
dUserRemapRunning = false
dNoUserRemap := daemon.New(t)
dNoUserRemap.Start(t)
defer dNoUserRemap.Stop(t)
clientNoUserRemap := dNoUserRemap.NewClientT(t)
tarFile, err := os.Open(tmp + "/image.tar")
assert.NilError(t, err, "failed to open image tar file")
tarReader := bufio.NewReader(tarFile)
loadResp, err := clientNoUserRemap.ImageLoad(ctx, tarReader, false)
assert.NilError(t, err, "failed to load image tar file")
defer loadResp.Body.Close()
buf = bytes.NewBuffer(nil)
err = jsonmessage.DisplayJSONMessagesStream(loadResp.Body, buf, 0, false, nil)
assert.NilError(t, err)
cid := container.Run(ctx, t, clientNoUserRemap,
container.WithImage(imageTag),
container.WithCmd("/sbin/getcap", "-n", "/bin/sleep"),
)
logReader, err := clientNoUserRemap.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
ShowStdout: true,
})
assert.NilError(t, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, logReader)
assert.NilError(t, err)
if strings.TrimSpace(actualStdout.String()) != "/bin/sleep cap_net_bind_service=eip" {
t.Fatalf("run produced invalid output: %q, expected %q", actualStdout.String(), "/bin/sleep cap_net_bind_service=eip")
}
}
| thaJeztah | 2834afe4268fd85f4a12e997855e2acac6e9ab45 | 3d966826874e3ecb00f2b49422faff050c61e8f8 | Oh! needed to update this as well as it also uses JSONmessage 🤦 | thaJeztah | 5,020 |
moby/moby | 41,936 | [testing] fix TestBuildUserNamespaceValidateCapabilitiesAreV2 failures | relates to https://github.com/moby/moby/pull/41925#issuecomment-767522877
relates to https://github.com/moby/moby/pull/41927#issuecomment-767370162
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
**- How I did it**
**- How to verify it**
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-26 14:30:32+00:00 | 2021-02-16 17:39:19+00:00 | integration/build/build_userns_linux_test.go | package build // import "github.com/docker/docker/integration/build"
import (
"bufio"
"bytes"
"context"
"io"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/testutil/daemon"
"github.com/docker/docker/testutil/fakecontext"
"github.com/docker/docker/testutil/fixtures/load"
"gotest.tools/v3/assert"
"gotest.tools/v3/skip"
)
// Implements a test for https://github.com/moby/moby/issues/41723
// Images built in a user-namespaced daemon should have capabilities serialised in
// VFS_CAP_REVISION_2 (no user-namespace root uid) format rather than V3 (that includes
// the root uid).
func TestBuildUserNamespaceValidateCapabilitiesAreV2(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !testEnv.IsUserNamespaceInKernel())
skip.If(t, testEnv.IsRootless())
const imageTag = "capabilities:1.0"
tmp, err := ioutil.TempDir("", "integration-")
assert.NilError(t, err)
defer os.RemoveAll(tmp)
dUserRemap := daemon.New(t)
dUserRemap.Start(t, "--userns-remap", "default")
ctx := context.Background()
clientUserRemap := dUserRemap.NewClientT(t)
err = load.FrozenImagesLinux(clientUserRemap, "buildpack-deps:buster")
assert.NilError(t, err)
dUserRemapRunning := true
defer func() {
if dUserRemapRunning {
dUserRemap.Stop(t)
}
}()
dockerfile := `
FROM debian:bullseye
RUN setcap CAP_NET_BIND_SERVICE=+eip /bin/sleep
`
source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
defer source.Close()
resp, err := clientUserRemap.ImageBuild(ctx,
source.AsTarReader(t),
types.ImageBuildOptions{
Tags: []string{imageTag},
})
assert.NilError(t, err)
defer resp.Body.Close()
buf := make([]byte, 1024)
for {
n, err := resp.Body.Read(buf)
if err != nil && err != io.EOF {
t.Fatalf("Error reading ImageBuild response: %v", err)
break
}
if n == 0 {
break
}
}
reader, err := clientUserRemap.ImageSave(ctx, []string{imageTag})
assert.NilError(t, err, "failed to download capabilities image")
defer reader.Close()
tar, err := os.Create(tmp + "/image.tar")
assert.NilError(t, err, "failed to create image tar file")
defer tar.Close()
_, err = io.Copy(tar, reader)
assert.NilError(t, err, "failed to write image tar file")
dUserRemap.Stop(t)
dUserRemap.Cleanup(t)
dUserRemapRunning = false
dNoUserRemap := daemon.New(t)
dNoUserRemap.Start(t)
defer dNoUserRemap.Stop(t)
clientNoUserRemap := dNoUserRemap.NewClientT(t)
tarFile, err := os.Open(tmp + "/image.tar")
assert.NilError(t, err, "failed to open image tar file")
tarReader := bufio.NewReader(tarFile)
loadResp, err := clientNoUserRemap.ImageLoad(ctx, tarReader, false)
assert.NilError(t, err, "failed to load image tar file")
defer loadResp.Body.Close()
for {
n, err := loadResp.Body.Read(buf)
if err != nil && err != io.EOF {
t.Fatalf("Error reading ImageLoad response: %v", err)
break
}
if n == 0 {
break
}
}
cid := container.Run(ctx, t, clientNoUserRemap,
container.WithImage(imageTag),
container.WithCmd("/sbin/getcap", "-n", "/bin/sleep"),
)
logReader, err := clientNoUserRemap.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
ShowStdout: true,
})
assert.NilError(t, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, logReader)
assert.NilError(t, err)
if strings.TrimSpace(actualStdout.String()) != "/bin/sleep cap_net_bind_service=eip" {
t.Fatalf("run produced invalid output: %q, expected %q", actualStdout.String(), "/bin/sleep cap_net_bind_service=eip")
}
}
| package build // import "github.com/docker/docker/integration/build"
import (
"bufio"
"bytes"
"context"
"io"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/stdcopy"
"github.com/docker/docker/testutil/daemon"
"github.com/docker/docker/testutil/fakecontext"
"github.com/docker/docker/testutil/fixtures/load"
"gotest.tools/v3/assert"
"gotest.tools/v3/skip"
)
// Implements a test for https://github.com/moby/moby/issues/41723
// Images built in a user-namespaced daemon should have capabilities serialised in
// VFS_CAP_REVISION_2 (no user-namespace root uid) format rather than V3 (that includes
// the root uid).
func TestBuildUserNamespaceValidateCapabilitiesAreV2(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !testEnv.IsUserNamespaceInKernel())
skip.If(t, testEnv.IsRootless())
const imageTag = "capabilities:1.0"
tmp, err := ioutil.TempDir("", "integration-")
assert.NilError(t, err)
defer os.RemoveAll(tmp)
dUserRemap := daemon.New(t)
dUserRemap.Start(t, "--userns-remap", "default")
ctx := context.Background()
clientUserRemap := dUserRemap.NewClientT(t)
err = load.FrozenImagesLinux(clientUserRemap, "debian:bullseye")
assert.NilError(t, err)
dUserRemapRunning := true
defer func() {
if dUserRemapRunning {
dUserRemap.Stop(t)
}
}()
dockerfile := `
FROM debian:bullseye
RUN setcap CAP_NET_BIND_SERVICE=+eip /bin/sleep
`
source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
defer source.Close()
resp, err := clientUserRemap.ImageBuild(ctx,
source.AsTarReader(t),
types.ImageBuildOptions{
Tags: []string{imageTag},
})
assert.NilError(t, err)
defer resp.Body.Close()
buf := bytes.NewBuffer(nil)
err = jsonmessage.DisplayJSONMessagesStream(resp.Body, buf, 0, false, nil)
assert.NilError(t, err)
reader, err := clientUserRemap.ImageSave(ctx, []string{imageTag})
assert.NilError(t, err, "failed to download capabilities image")
defer reader.Close()
tar, err := os.Create(tmp + "/image.tar")
assert.NilError(t, err, "failed to create image tar file")
defer tar.Close()
_, err = io.Copy(tar, reader)
assert.NilError(t, err, "failed to write image tar file")
dUserRemap.Stop(t)
dUserRemap.Cleanup(t)
dUserRemapRunning = false
dNoUserRemap := daemon.New(t)
dNoUserRemap.Start(t)
defer dNoUserRemap.Stop(t)
clientNoUserRemap := dNoUserRemap.NewClientT(t)
tarFile, err := os.Open(tmp + "/image.tar")
assert.NilError(t, err, "failed to open image tar file")
tarReader := bufio.NewReader(tarFile)
loadResp, err := clientNoUserRemap.ImageLoad(ctx, tarReader, false)
assert.NilError(t, err, "failed to load image tar file")
defer loadResp.Body.Close()
buf = bytes.NewBuffer(nil)
err = jsonmessage.DisplayJSONMessagesStream(loadResp.Body, buf, 0, false, nil)
assert.NilError(t, err)
cid := container.Run(ctx, t, clientNoUserRemap,
container.WithImage(imageTag),
container.WithCmd("/sbin/getcap", "-n", "/bin/sleep"),
)
logReader, err := clientNoUserRemap.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
ShowStdout: true,
})
assert.NilError(t, err)
actualStdout := new(bytes.Buffer)
actualStderr := ioutil.Discard
_, err = stdcopy.StdCopy(actualStdout, actualStderr, logReader)
assert.NilError(t, err)
if strings.TrimSpace(actualStdout.String()) != "/bin/sleep cap_net_bind_service=eip" {
t.Fatalf("run produced invalid output: %q, expected %q", actualStdout.String(), "/bin/sleep cap_net_bind_service=eip")
}
}
| thaJeztah | 2834afe4268fd85f4a12e997855e2acac6e9ab45 | 3d966826874e3ecb00f2b49422faff050c61e8f8 | Updated 👍 | thaJeztah | 5,021 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | This can use the `log` that's initialised above; https://github.com/moby/moby/blob/d5612a0ef8aa5c43f8345302e8d20b5fd25517b3/daemon/daemon.go#L324
```suggestion
log.Info("restored health monitor")
``` | thaJeztah | 5,022 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Indeed there is no reason to initialize a new instance of logrus, it is fixed. Thank you. | m-k8s | 5,023 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
<!--
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"closes #xxxx"
Please provide the following information:
-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | We should clean up this if clause.
Similar check got us into trouble one if-block up already. | cpuguy83 | 5,024 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
<!--
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"closes #xxxx"
Please provide the following information:
-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Probably a `switch` statement will be more resilient to future changes. | cpuguy83 | 5,025 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
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**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Done | m-k8s | 5,026 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
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**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
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Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Given this very next thing is essentially the `else` block to the new `switch` statement, what do you think about making this something like this? (Honest question -- I think this conceptually makes more sense reading it, but it's all opinion :sweat_smile:)
```go
if alive {
if c.IsPaused() {
// ...
} else {
// ...
}
} else {
// ...
}
```
Alternatively, I'd suggest we push it up inside the `switch` statement as well, but I do wonder whether `c.IsPaused` is "heavy" enough to try to make sure we only invoke it once? | tianon | 5,027 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
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**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Yes, perhaps it's good to move the `alive` check to a separate `if/else`
Looking at the above, I notice that for the `c.IsPaused()` branch we acquire a lock for the container, whereas for the `!c.IsPaused()`, we don't. Does `daemon.updateHealthMonitor(c)` need a lock? | thaJeztah | 5,028 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
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**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
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Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
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Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | >
>
> Given this very next thing is essentially the `else` block to the new `switch` statement, what do you think about making this something like this? (Honest question -- I think this conceptually makes more sense reading it, but it's all opinion 😅)
>
> ```go
> if alive {
> if c.IsPaused() {
> // ...
> } else {
> // ...
> }
> } else {
> // ...
> }
> ```
>
> Alternatively, I'd suggest we push it up inside the `switch` statement as well, but I do wonder whether `c.IsPaused` is "heavy" enough to try to make sure we only invoke it once?
Yes you are right, I am correcting that. | m-k8s | 5,029 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
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**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | >
>
> Yes, perhaps it's good to move the `alive` check to a separate `if/else`
>
> Looking at the above, I notice that for the `c.IsPaused()` branch we acquire a lock for the container, whereas for the `!c.IsPaused()`, we don't. Does `daemon.updateHealthMonitor(c)` need a lock?
Yes you're right, when I look at the rest of the code including other files we always do a lock before calling updateHealthMonitor.
I am correcting this now.
Thank you | m-k8s | 5,030 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
<!--
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guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Thanks! I'll have another look after you updated (give me a "ping" when you've done so) | thaJeztah | 5,031 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
<!--
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guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | done | m-k8s | 5,032 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
<!--
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"closes #xxxx"
Please provide the following information:
-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Oh! hmm.. wondering now if we need the two separate if blocks after all. The linter now marks this one, which may be a valid issue. Looks like we're updating the `alive` status based on the container status, which means that we'll have to run the `"setting stopped state"` code further down (which is now in an "else")
```
[2021-09-22T19:57:59.011Z] daemon/daemon.go:379:9: ineffectual assignment to `alive` (ineffassign)
[2021-09-22T19:57:59.011Z] alive = false
[2021-09-22T19:57:59.011Z] ^
```
Sorry for that (and for suggesting to change it to a single `if/else`
We really need to review the code logic in this part, as it's too complicated (and error-prone, which the above shows) | thaJeztah | 5,033 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
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-->
**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
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Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Yes indeed I did not realize it but it will not work as expected :(
As you say, the "setting stopped state" part is never executed when we enter the "containerd.Stopped" case.
So I think the best compromise would be to go back to the switch statement? It sounds more maintainable to me than multiple if / else statements. | m-k8s | 5,034 |
moby/moby | 41,935 | Resume healthcheck when daemon restarts | Call updateHealthMonitor for alive non-paused containers when daemon restarts.
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**What I did**
Fix issue #41871 feat. @ealessandria-orange
**- How I did it**
While dockerd restores, call updateHealthMonitor for non paused alive containers.
**- How to verify it**
At dockerd restart, containers' healthcheck is still running.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix issue #41871
| null | 2021-01-26 14:04:11+00:00 | 2021-10-15 10:46:43+00:00 | daemon/daemon.go | // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
if c.IsPaused() && alive {
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| // Package daemon exposes the functions that occur on the host server
// that the Docker daemon is running.
//
// In implementing the various functions of the daemon, there is often
// a method-specific struct for configuring the runtime behavior.
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"net"
"net/url"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/defaults"
"github.com/containerd/containerd/pkg/dialer"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/remotes/docker"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/builder"
"github.com/docker/docker/container"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/daemon/discovery"
"github.com/docker/docker/daemon/events"
"github.com/docker/docker/daemon/exec"
_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
"github.com/docker/docker/daemon/images"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/network"
"github.com/docker/docker/daemon/stats"
dmetadata "github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/libnetwork"
"github.com/docker/docker/libnetwork/cluster"
nwconfig "github.com/docker/docker/libnetwork/config"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/pkg/truncindex"
"github.com/docker/docker/plugin"
pluginexec "github.com/docker/docker/plugin/executor/containerd"
refstore "github.com/docker/docker/reference"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
volumesservice "github.com/docker/docker/volume/service"
"github.com/moby/buildkit/util/resolver"
"github.com/moby/locker"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"go.etcd.io/bbolt"
"golang.org/x/sync/semaphore"
"golang.org/x/sync/singleflight"
"google.golang.org/grpc"
"google.golang.org/grpc/backoff"
)
// ContainersNamespace is the name of the namespace used for users containers
const (
ContainersNamespace = "moby"
)
var (
errSystemNotSupported = errors.New("the Docker daemon is not supported on this platform")
)
// Daemon holds information about the Docker daemon.
type Daemon struct {
ID string
repository string
containers container.Store
containersReplica container.ViewDB
execCommands *exec.Store
imageService *images.ImageService
idIndex *truncindex.TruncIndex
configStore *config.Config
statsCollector *stats.Collector
defaultLogConfig containertypes.LogConfig
RegistryService registry.Service
EventsService *events.Events
netController libnetwork.NetworkController
volumes *volumesservice.VolumesService
discoveryWatcher discovery.Reloader
root string
seccompEnabled bool
apparmorEnabled bool
shutdown bool
idMapping *idtools.IdentityMapping
graphDriver string // TODO: move graphDriver field to an InfoService
PluginStore *plugin.Store // TODO: remove
pluginManager *plugin.Manager
linkIndex *linkIndex
containerdCli *containerd.Client
containerd libcontainerdtypes.Client
defaultIsolation containertypes.Isolation // Default isolation mode on Windows
clusterProvider cluster.Provider
cluster Cluster
genericResources []swarm.GenericResource
metricsPluginListener net.Listener
machineMemory uint64
seccompProfile []byte
seccompProfilePath string
usage singleflight.Group
pruneRunning int32
hosts map[string]bool // hosts stores the addresses the daemon is listening on
startupDone chan struct{}
attachmentStore network.AttachmentStore
attachableNetworkLock *locker.Locker
// This is used for Windows which doesn't currently support running on containerd
// It stores metadata for the content store (used for manifest caching)
// This needs to be closed on daemon exit
mdDB *bbolt.DB
}
// StoreHosts stores the addresses the daemon is listening on
func (daemon *Daemon) StoreHosts(hosts []string) {
if daemon.hosts == nil {
daemon.hosts = make(map[string]bool)
}
for _, h := range hosts {
daemon.hosts[h] = true
}
}
// HasExperimental returns whether the experimental features of the daemon are enabled or not
func (daemon *Daemon) HasExperimental() bool {
return daemon.configStore != nil && daemon.configStore.Experimental
}
// Features returns the features map from configStore
func (daemon *Daemon) Features() *map[string]bool {
return &daemon.configStore.Features
}
// RegistryHosts returns registry configuration in containerd resolvers format
func (daemon *Daemon) RegistryHosts() docker.RegistryHosts {
var (
registryKey = "docker.io"
mirrors = make([]string, len(daemon.configStore.Mirrors))
m = map[string]resolver.RegistryConfig{}
)
// must trim "https://" or "http://" prefix
for i, v := range daemon.configStore.Mirrors {
if uri, err := url.Parse(v); err == nil {
v = uri.Host
}
mirrors[i] = v
}
// set mirrors for default registry
m[registryKey] = resolver.RegistryConfig{Mirrors: mirrors}
for _, v := range daemon.configStore.InsecureRegistries {
u, err := url.Parse(v)
c := resolver.RegistryConfig{}
if err == nil {
v = u.Host
t := true
if u.Scheme == "http" {
c.PlainHTTP = &t
} else {
c.Insecure = &t
}
}
m[v] = c
}
for k, v := range m {
if d, err := registry.HostCertsDir(k); err == nil {
v.TLSConfigDir = []string{d}
m[k] = v
}
}
certsDir := registry.CertsDir()
if fis, err := os.ReadDir(certsDir); err == nil {
for _, fi := range fis {
if _, ok := m[fi.Name()]; !ok {
m[fi.Name()] = resolver.RegistryConfig{
TLSConfigDir: []string{filepath.Join(certsDir, fi.Name())},
}
}
}
}
return resolver.NewRegistryConfig(m)
}
func (daemon *Daemon) restore() error {
var mapLock sync.Mutex
containers := make(map[string]*container.Container)
logrus.Info("Loading containers: start.")
dir, err := os.ReadDir(daemon.repository)
if err != nil {
return err
}
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(dir), 128*runtime.NumCPU())
// Re-used for all parallel startup jobs.
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, v := range dir {
group.Add(1)
go func(id string) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", id)
c, err := daemon.load(id)
if err != nil {
log.WithError(err).Error("failed to load container")
return
}
if !system.IsOSSupported(c.OS) {
log.Errorf("failed to load container: %s (%q)", system.ErrNotSupportedOperatingSystem, c.OS)
return
}
// Ignore the container if it does not support the current driver being used by the graph
if (c.Driver == "" && daemon.graphDriver == "aufs") || c.Driver == daemon.graphDriver {
rwlayer, err := daemon.imageService.GetLayerByID(c.ID)
if err != nil {
log.WithError(err).Error("failed to load container mount")
return
}
c.RWLayer = rwlayer
log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
}).Debug("loaded container")
mapLock.Lock()
containers[c.ID] = c
mapLock.Unlock()
} else {
log.Debugf("cannot load container because it was created with another storage driver")
}
}(v.Name())
}
group.Wait()
removeContainers := make(map[string]*container.Container)
restartContainers := make(map[*container.Container]chan struct{})
activeSandboxes := make(map[string]interface{})
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
if err := daemon.registerName(c); err != nil {
log.WithError(err).Errorf("failed to register container name: %s", c.Name)
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
if err := daemon.Register(c); err != nil {
log.WithError(err).Error("failed to register container")
mapLock.Lock()
delete(containers, c.ID)
mapLock.Unlock()
return
}
}(c)
}
group.Wait()
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
defer group.Done()
_ = sem.Acquire(context.Background(), 1)
defer sem.Release(1)
log := logrus.WithField("container", c.ID)
daemon.backportMountSpec(c)
if err := daemon.checkpointAndSave(c); err != nil {
log.WithError(err).Error("error saving backported mountspec to disk")
}
daemon.setStateCounter(c)
logger := func(c *container.Container) *logrus.Entry {
return log.WithFields(logrus.Fields{
"running": c.IsRunning(),
"paused": c.IsPaused(),
"restarting": c.IsRestarting(),
})
}
logger(c).Debug("restoring container")
var (
err error
alive bool
ec uint32
exitedAt time.Time
process libcontainerdtypes.Process
)
alive, _, process, err = daemon.containerd.Restore(context.Background(), c.ID, c.InitializeStdio)
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to restore container with containerd")
return
}
logger(c).Debugf("alive: %v", alive)
if !alive {
// If process is not nil, cleanup dead container from containerd.
// If process is nil then the above `containerd.Restore` returned an errdefs.NotFoundError,
// and docker's view of the container state will be updated accorrdingly via SetStopped further down.
if process != nil {
logger(c).Debug("cleaning up dead container process")
ec, exitedAt, err = process.Delete(context.Background())
if err != nil && !errdefs.IsNotFound(err) {
logger(c).WithError(err).Error("failed to delete container from containerd")
return
}
}
} else if !daemon.configStore.LiveRestoreEnabled {
logger(c).Debug("shutting down container considered alive by containerd")
if err := daemon.shutdownContainer(c); err != nil && !errdefs.IsNotFound(err) {
log.WithError(err).Error("error shutting down container")
return
}
c.ResetRestartManager(false)
}
if c.IsRunning() || c.IsPaused() {
logger(c).Debug("syncing container on disk state with real state")
c.RestartManager().Cancel() // manually start containers because some need to wait for swarm networking
switch {
case c.IsPaused() && alive:
s, err := daemon.containerd.Status(context.Background(), c.ID)
if err != nil {
logger(c).WithError(err).Error("failed to get container status")
} else {
logger(c).WithField("state", s).Info("restored container paused")
switch s {
case containerd.Paused, containerd.Pausing:
// nothing to do
case containerd.Stopped:
alive = false
case containerd.Unknown:
log.Error("unknown status for paused container during restore")
default:
// running
c.Lock()
c.Paused = false
daemon.setStateCounter(c)
daemon.updateHealthMonitor(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update paused container state")
}
c.Unlock()
}
}
case !c.IsPaused() && alive:
logger(c).Debug("restoring healthcheck")
c.Lock()
daemon.updateHealthMonitor(c)
c.Unlock()
}
if !alive {
logger(c).Debug("setting stopped state")
c.Lock()
c.SetStopped(&container.ExitStatus{ExitCode: int(ec), ExitedAt: exitedAt})
daemon.Cleanup(c)
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update stopped container state")
}
c.Unlock()
logger(c).Debug("set stopped state")
}
// we call Mount and then Unmount to get BaseFs of the container
if err := daemon.Mount(c); err != nil {
// The mount is unlikely to fail. However, in case mount fails
// the container should be allowed to restore here. Some functionalities
// (like docker exec -u user) might be missing but container is able to be
// stopped/restarted/removed.
// See #29365 for related information.
// The error is only logged here.
logger(c).WithError(err).Warn("failed to mount container to get BaseFs path")
} else {
if err := daemon.Unmount(c); err != nil {
logger(c).WithError(err).Warn("failed to umount container to get BaseFs path")
}
}
c.ResetRestartManager(false)
if !c.HostConfig.NetworkMode.IsContainer() && c.IsRunning() {
options, err := daemon.buildSandboxOptions(c)
if err != nil {
logger(c).WithError(err).Warn("failed to build sandbox option to restore container")
}
mapLock.Lock()
activeSandboxes[c.NetworkSettings.SandboxID] = options
mapLock.Unlock()
}
}
// get list of containers we need to restart
// Do not autostart containers which
// has endpoints in a swarm scope
// network yet since the cluster is
// not initialized yet. We will start
// it after the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && !c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
mapLock.Lock()
restartContainers[c] = make(chan struct{})
mapLock.Unlock()
} else if c.HostConfig != nil && c.HostConfig.AutoRemove {
mapLock.Lock()
removeContainers[c.ID] = c
mapLock.Unlock()
}
c.Lock()
if c.RemovalInProgress {
// We probably crashed in the middle of a removal, reset
// the flag.
//
// We DO NOT remove the container here as we do not
// know if the user had requested for either the
// associated volumes, network links or both to also
// be removed. So we put the container in the "dead"
// state and leave further processing up to them.
c.RemovalInProgress = false
c.Dead = true
if err := c.CheckpointTo(daemon.containersReplica); err != nil {
log.WithError(err).Error("failed to update RemovalInProgress container state")
} else {
log.Debugf("reset RemovalInProgress state for container")
}
}
c.Unlock()
logger(c).Debug("done restoring container")
}(c)
}
group.Wait()
daemon.netController, err = daemon.initNetworkController(daemon.configStore, activeSandboxes)
if err != nil {
return fmt.Errorf("Error initializing network controller: %v", err)
}
// Now that all the containers are registered, register the links
for _, c := range containers {
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.registerLinks(c, c.HostConfig); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to register link for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
for c, notifier := range restartContainers {
group.Add(1)
go func(c *container.Container, chNotify chan struct{}) {
_ = sem.Acquire(context.Background(), 1)
log := logrus.WithField("container", c.ID)
log.Debug("starting container")
// ignore errors here as this is a best effort to wait for children to be
// running before we try to start the container
children := daemon.children(c)
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
for _, child := range children {
if notifier, exists := restartContainers[child]; exists {
select {
case <-notifier:
case <-timeout.C:
}
}
}
// Make sure networks are available before starting
daemon.waitForNetworks(c)
if err := daemon.containerStart(c, "", "", true); err != nil {
log.WithError(err).Error("failed to start container")
}
close(chNotify)
sem.Release(1)
group.Done()
}(c, notifier)
}
group.Wait()
for id := range removeContainers {
group.Add(1)
go func(cid string) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.ContainerRm(cid, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil {
logrus.WithField("container", cid).WithError(err).Error("failed to remove container")
}
sem.Release(1)
group.Done()
}(id)
}
group.Wait()
// any containers that were started above would already have had this done,
// however we need to now prepare the mountpoints for the rest of the containers as well.
// This shouldn't cause any issue running on the containers that already had this run.
// This must be run after any containers with a restart policy so that containerized plugins
// can have a chance to be running before we try to initialize them.
for _, c := range containers {
// if the container has restart policy, do not
// prepare the mountpoints since it has been done on restarting.
// This is to speed up the daemon start when a restart container
// has a volume and the volume driver is not available.
if _, ok := restartContainers[c]; ok {
continue
} else if _, ok := removeContainers[c.ID]; ok {
// container is automatically removed, skip it.
continue
}
group.Add(1)
go func(c *container.Container) {
_ = sem.Acquire(context.Background(), 1)
if err := daemon.prepareMountPoints(c); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to prepare mountpoints for container")
}
sem.Release(1)
group.Done()
}(c)
}
group.Wait()
logrus.Info("Loading containers: done.")
return nil
}
// RestartSwarmContainers restarts any autostart container which has a
// swarm endpoint.
func (daemon *Daemon) RestartSwarmContainers() {
ctx := context.Background()
// parallelLimit is the maximum number of parallel startup jobs that we
// allow (this is the limited used for all startup semaphores). The multipler
// (128) was chosen after some fairly significant benchmarking -- don't change
// it unless you've tested it significantly (this value is adjusted if
// RLIMIT_NOFILE is small to avoid EMFILE).
parallelLimit := adjustParallelLimit(len(daemon.List()), 128*runtime.NumCPU())
var group sync.WaitGroup
sem := semaphore.NewWeighted(int64(parallelLimit))
for _, c := range daemon.List() {
if !c.IsRunning() && !c.IsPaused() {
// Autostart all the containers which has a
// swarm endpoint now that the cluster is
// initialized.
if daemon.configStore.AutoRestart && c.ShouldRestart() && c.NetworkSettings.HasSwarmEndpoint && c.HasBeenStartedBefore {
group.Add(1)
go func(c *container.Container) {
if err := sem.Acquire(ctx, 1); err != nil {
// ctx is done.
group.Done()
return
}
if err := daemon.containerStart(c, "", "", true); err != nil {
logrus.WithField("container", c.ID).WithError(err).Error("failed to start swarm container")
}
sem.Release(1)
group.Done()
}(c)
}
}
}
group.Wait()
}
// waitForNetworks is used during daemon initialization when starting up containers
// It ensures that all of a container's networks are available before the daemon tries to start the container.
// In practice it just makes sure the discovery service is available for containers which use a network that require discovery.
func (daemon *Daemon) waitForNetworks(c *container.Container) {
if daemon.discoveryWatcher == nil {
return
}
// Make sure if the container has a network that requires discovery that the discovery service is available before starting
for netName := range c.NetworkSettings.Networks {
// If we get `ErrNoSuchNetwork` here, we can assume that it is due to discovery not being ready
// Most likely this is because the K/V store used for discovery is in a container and needs to be started
if _, err := daemon.netController.NetworkByName(netName); err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
continue
}
// use a longish timeout here due to some slowdowns in libnetwork if the k/v store is on anything other than --net=host
// FIXME: why is this slow???
dur := 60 * time.Second
timer := time.NewTimer(dur)
logrus.WithField("container", c.ID).Debugf("Container %s waiting for network to be ready", c.Name)
select {
case <-daemon.discoveryWatcher.ReadyCh():
case <-timer.C:
}
timer.Stop()
return
}
}
}
func (daemon *Daemon) children(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.children(c)
}
// parents returns the names of the parent containers of the container
// with the given name.
func (daemon *Daemon) parents(c *container.Container) map[string]*container.Container {
return daemon.linkIndex.parents(c)
}
func (daemon *Daemon) registerLink(parent, child *container.Container, alias string) error {
fullName := path.Join(parent.Name, alias)
if err := daemon.containersReplica.ReserveName(fullName, child.ID); err != nil {
if err == container.ErrNameReserved {
logrus.Warnf("error registering link for %s, to %s, as alias %s, ignoring: %v", parent.ID, child.ID, alias, err)
return nil
}
return err
}
daemon.linkIndex.link(parent, child, fullName)
return nil
}
// DaemonJoinsCluster informs the daemon has joined the cluster and provides
// the handler to query the cluster component
func (daemon *Daemon) DaemonJoinsCluster(clusterProvider cluster.Provider) {
daemon.setClusterProvider(clusterProvider)
}
// DaemonLeavesCluster informs the daemon has left the cluster
func (daemon *Daemon) DaemonLeavesCluster() {
// Daemon is in charge of removing the attachable networks with
// connected containers when the node leaves the swarm
daemon.clearAttachableNetworks()
// We no longer need the cluster provider, stop it now so that
// the network agent will stop listening to cluster events.
daemon.setClusterProvider(nil)
// Wait for the networking cluster agent to stop
daemon.netController.AgentStopWait()
// Daemon is in charge of removing the ingress network when the
// node leaves the swarm. Wait for job to be done or timeout.
// This is called also on graceful daemon shutdown. We need to
// wait, because the ingress release has to happen before the
// network controller is stopped.
if done, err := daemon.ReleaseIngress(); err == nil {
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case <-done:
case <-timeout.C:
logrus.Warn("timeout while waiting for ingress network removal")
}
} else {
logrus.Warnf("failed to initiate ingress network removal: %v", err)
}
daemon.attachmentStore.ClearAttachments()
}
// setClusterProvider sets a component for querying the current cluster state.
func (daemon *Daemon) setClusterProvider(clusterProvider cluster.Provider) {
daemon.clusterProvider = clusterProvider
daemon.netController.SetClusterProvider(clusterProvider)
daemon.attachableNetworkLock = locker.New()
}
// IsSwarmCompatible verifies if the current daemon
// configuration is compatible with the swarm mode
func (daemon *Daemon) IsSwarmCompatible() error {
if daemon.configStore == nil {
return nil
}
return daemon.configStore.IsSwarmCompatible()
}
// NewDaemon sets up everything for the daemon to be able to service
// requests from the webserver.
func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.Store) (daemon *Daemon, err error) {
setDefaultMtu(config)
registryService, err := registry.NewService(config.ServiceOptions)
if err != nil {
return nil, err
}
// Ensure that we have a correct root key limit for launching containers.
if err := modifyRootKeyLimit(); err != nil {
logrus.Warnf("unable to modify root key limit, number of containers could be limited by this quota: %v", err)
}
// Ensure we have compatible and valid configuration options
if err := verifyDaemonSettings(config); err != nil {
return nil, err
}
// Do we have a disabled network?
config.DisableBridge = isBridgeNetworkDisabled(config)
// Setup the resolv.conf
setupResolvConf(config)
// Verify the platform is supported as a daemon
if !platformSupported {
return nil, errSystemNotSupported
}
// Validate platform-specific requirements
if err := checkSystem(); err != nil {
return nil, err
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return nil, err
}
rootIDs := idMapping.RootPair()
if err := setupDaemonProcess(config); err != nil {
return nil, err
}
// set up the tmpDir to use a canonical path
tmp, err := prepareTempDir(config.Root)
if err != nil {
return nil, fmt.Errorf("Unable to get the TempDir under %s: %s", config.Root, err)
}
realTmp, err := fileutils.ReadSymlinkedDirectory(tmp)
if err != nil {
return nil, fmt.Errorf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
if isWindows {
if _, err := os.Stat(realTmp); err != nil && os.IsNotExist(err) {
if err := system.MkdirAll(realTmp, 0700); err != nil {
return nil, fmt.Errorf("Unable to create the TempDir (%s): %s", realTmp, err)
}
}
os.Setenv("TEMP", realTmp)
os.Setenv("TMP", realTmp)
} else {
os.Setenv("TMPDIR", realTmp)
}
d := &Daemon{
configStore: config,
PluginStore: pluginStore,
startupDone: make(chan struct{}),
}
// Ensure the daemon is properly shutdown if there is a failure during
// initialization
defer func() {
if err != nil {
if err := d.Shutdown(); err != nil {
logrus.Error(err)
}
}
}()
if err := d.setGenericResources(config); err != nil {
return nil, err
}
// set up SIGUSR1 handler on Unix-like systems, or a Win32 global event
// on Windows to dump Go routine stacks
stackDumpDir := config.Root
if execRoot := config.GetExecRoot(); execRoot != "" {
stackDumpDir = execRoot
}
d.setupDumpStackTrap(stackDumpDir)
if err := d.setupSeccompProfile(); err != nil {
return nil, err
}
// Set the default isolation mode (only applicable on Windows)
if err := d.setDefaultIsolation(); err != nil {
return nil, fmt.Errorf("error setting default isolation mode: %v", err)
}
if err := configureMaxThreads(config); err != nil {
logrus.Warnf("Failed to configure golang's threads limit: %v", err)
}
// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
if err := ensureDefaultAppArmorProfile(); err != nil {
logrus.Errorf(err.Error())
}
daemonRepo := filepath.Join(config.Root, "containers")
if err := idtools.MkdirAllAndChown(daemonRepo, 0710, idtools.Identity{
UID: idtools.CurrentIdentity().UID,
GID: rootIDs.GID,
}); err != nil {
return nil, err
}
// Create the directory where we'll store the runtime scripts (i.e. in
// order to support runtimeArgs)
daemonRuntimes := filepath.Join(config.Root, "runtimes")
if err := system.MkdirAll(daemonRuntimes, 0700); err != nil {
return nil, err
}
if err := d.loadRuntimes(); err != nil {
return nil, err
}
if isWindows {
if err := system.MkdirAll(filepath.Join(config.Root, "credentialspecs"), 0); err != nil {
return nil, err
}
}
if isWindows {
// On Windows we don't support the environment variable, or a user supplied graphdriver
d.graphDriver = "windowsfilter"
} else {
// Unix platforms however run a single graphdriver for all containers, and it can
// be set through an environment variable, a daemon start parameter, or chosen through
// initialization of the layerstore through driver priority order for example.
if drv := os.Getenv("DOCKER_DRIVER"); drv != "" {
d.graphDriver = drv
logrus.Infof("Setting the storage driver from the $DOCKER_DRIVER environment variable (%s)", drv)
} else {
d.graphDriver = config.GraphDriver // May still be empty. Layerstore init determines instead.
}
}
d.RegistryService = registryService
logger.RegisterPluginGetter(d.PluginStore)
metricsSockPath, err := d.listenMetricsSock()
if err != nil {
return nil, err
}
registerMetricsPluginCallback(d.PluginStore, metricsSockPath)
backoffConfig := backoff.DefaultConfig
backoffConfig.MaxDelay = 3 * time.Second
connParams := grpc.ConnectParams{
Backoff: backoffConfig,
}
gopts := []grpc.DialOption{
// WithBlock makes sure that the following containerd request
// is reliable.
//
// NOTE: In one edge case with high load pressure, kernel kills
// dockerd, containerd and containerd-shims caused by OOM.
// When both dockerd and containerd restart, but containerd
// will take time to recover all the existing containers. Before
// containerd serving, dockerd will failed with gRPC error.
// That bad thing is that restore action will still ignore the
// any non-NotFound errors and returns running state for
// already stopped container. It is unexpected behavior. And
// we need to restart dockerd to make sure that anything is OK.
//
// It is painful. Add WithBlock can prevent the edge case. And
// n common case, the containerd will be serving in shortly.
// It is not harm to add WithBlock for containerd connection.
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithConnectParams(connParams),
grpc.WithContextDialer(dialer.ContextDialer),
// TODO(stevvooe): We may need to allow configuration of this on the client.
grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(defaults.DefaultMaxRecvMsgSize)),
grpc.WithDefaultCallOptions(grpc.MaxCallSendMsgSize(defaults.DefaultMaxSendMsgSize)),
}
if config.ContainerdAddr != "" {
d.containerdCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
createPluginExec := func(m *plugin.Manager) (plugin.Executor, error) {
var pluginCli *containerd.Client
if config.ContainerdAddr != "" {
pluginCli, err = containerd.New(config.ContainerdAddr, containerd.WithDefaultNamespace(config.ContainerdPluginNamespace), containerd.WithDialOpts(gopts), containerd.WithTimeout(60*time.Second))
if err != nil {
return nil, errors.Wrapf(err, "failed to dial %q", config.ContainerdAddr)
}
}
var rt types.Runtime
if runtime.GOOS != "windows" {
rtPtr, err := d.getRuntime(config.GetDefaultRuntimeName())
if err != nil {
return nil, err
}
rt = *rtPtr
}
return pluginexec.New(ctx, getPluginExecRoot(config.Root), pluginCli, config.ContainerdPluginNamespace, m, rt)
}
// Plugin system initialization should happen before restore. Do not change order.
d.pluginManager, err = plugin.NewManager(plugin.ManagerConfig{
Root: filepath.Join(config.Root, "plugins"),
ExecRoot: getPluginExecRoot(config.Root),
Store: d.PluginStore,
CreateExecutor: createPluginExec,
RegistryService: registryService,
LiveRestoreEnabled: config.LiveRestoreEnabled,
LogPluginEvent: d.LogPluginEvent, // todo: make private
AuthzMiddleware: config.AuthzMiddleware,
})
if err != nil {
return nil, errors.Wrap(err, "couldn't create plugin manager")
}
if err := d.setupDefaultLogConfig(); err != nil {
return nil, err
}
layerStore, err := layer.NewStoreFromOptions(layer.StoreOptions{
Root: config.Root,
MetadataStorePathTemplate: filepath.Join(config.Root, "image", "%s", "layerdb"),
GraphDriver: d.graphDriver,
GraphDriverOptions: config.GraphOptions,
IDMapping: idMapping,
PluginGetter: d.PluginStore,
ExperimentalEnabled: config.Experimental,
OS: runtime.GOOS,
})
if err != nil {
return nil, err
}
// As layerstore initialization may set the driver
d.graphDriver = layerStore.DriverName()
// Configure and validate the kernels security support. Note this is a Linux/FreeBSD
// operation only, so it is safe to pass *just* the runtime OS graphdriver.
if err := configureKernelSecuritySupport(config, d.graphDriver); err != nil {
return nil, err
}
imageRoot := filepath.Join(config.Root, "image", d.graphDriver)
ifs, err := image.NewFSStoreBackend(filepath.Join(imageRoot, "imagedb"))
if err != nil {
return nil, err
}
imageStore, err := image.NewImageStore(ifs, layerStore)
if err != nil {
return nil, err
}
d.volumes, err = volumesservice.NewVolumeService(config.Root, d.PluginStore, rootIDs, d)
if err != nil {
return nil, err
}
trustKey, err := loadOrCreateTrustKey(config.TrustKeyPath)
if err != nil {
return nil, err
}
trustDir := filepath.Join(config.Root, "trust")
if err := system.MkdirAll(trustDir, 0700); err != nil {
return nil, err
}
// We have a single tag/reference store for the daemon globally. However, it's
// stored under the graphdriver. On host platforms which only support a single
// container OS, but multiple selectable graphdrivers, this means depending on which
// graphdriver is chosen, the global reference store is under there. For
// platforms which support multiple container operating systems, this is slightly
// more problematic as where does the global ref store get located? Fortunately,
// for Windows, which is currently the only daemon supporting multiple container
// operating systems, the list of graphdrivers available isn't user configurable.
// For backwards compatibility, we just put it under the windowsfilter
// directory regardless.
refStoreLocation := filepath.Join(imageRoot, `repositories.json`)
rs, err := refstore.NewReferenceStore(refStoreLocation)
if err != nil {
return nil, fmt.Errorf("Couldn't create reference store repository: %s", err)
}
distributionMetadataStore, err := dmetadata.NewFSMetadataStore(filepath.Join(imageRoot, "distribution"))
if err != nil {
return nil, err
}
// Discovery is only enabled when the daemon is launched with an address to advertise. When
// initialized, the daemon is registered and we can store the discovery backend as it's read-only
if err := d.initDiscovery(config); err != nil {
return nil, err
}
sysInfo := d.RawSysInfo()
for _, w := range sysInfo.Warnings {
logrus.Warn(w)
}
// Check if Devices cgroup is mounted, it is hard requirement for container security,
// on Linux.
if runtime.GOOS == "linux" && !sysInfo.CgroupDevicesEnabled && !userns.RunningInUserNS() {
return nil, errors.New("Devices cgroup isn't mounted")
}
d.ID = trustKey.PublicKey().KeyID()
d.repository = daemonRepo
d.containers = container.NewMemoryStore()
if d.containersReplica, err = container.NewViewDB(); err != nil {
return nil, err
}
d.execCommands = exec.NewStore()
d.idIndex = truncindex.NewTruncIndex([]string{})
d.statsCollector = d.newStatsCollector(1 * time.Second)
d.EventsService = events.New()
d.root = config.Root
d.idMapping = idMapping
d.seccompEnabled = sysInfo.Seccomp
d.apparmorEnabled = sysInfo.AppArmor
d.linkIndex = newLinkIndex()
imgSvcConfig := images.ImageServiceConfig{
ContainerStore: d.containers,
DistributionMetadataStore: distributionMetadataStore,
EventsService: d.EventsService,
ImageStore: imageStore,
LayerStore: layerStore,
MaxConcurrentDownloads: *config.MaxConcurrentDownloads,
MaxConcurrentUploads: *config.MaxConcurrentUploads,
MaxDownloadAttempts: *config.MaxDownloadAttempts,
ReferenceStore: rs,
RegistryService: registryService,
TrustKey: trustKey,
ContentNamespace: config.ContainerdNamespace,
}
// containerd is not currently supported with Windows.
// So sometimes d.containerdCli will be nil
// In that case we'll create a local content store... but otherwise we'll use containerd
if d.containerdCli != nil {
imgSvcConfig.Leases = d.containerdCli.LeasesService()
imgSvcConfig.ContentStore = d.containerdCli.ContentStore()
} else {
cs, lm, err := d.configureLocalContentStore()
if err != nil {
return nil, err
}
imgSvcConfig.ContentStore = cs
imgSvcConfig.Leases = lm
}
// TODO: imageStore, distributionMetadataStore, and ReferenceStore are only
// used above to run migration. They could be initialized in ImageService
// if migration is called from daemon/images. layerStore might move as well.
d.imageService = images.NewImageService(imgSvcConfig)
go d.execCommandGC()
if err := d.initLibcontainerd(ctx); err != nil {
return nil, err
}
if err := d.restore(); err != nil {
return nil, err
}
close(d.startupDone)
info := d.SystemInfo()
engineInfo.WithValues(
dockerversion.Version,
dockerversion.GitCommit,
info.Architecture,
info.Driver,
info.KernelVersion,
info.OperatingSystem,
info.OSType,
info.OSVersion,
info.ID,
).Set(1)
engineCpus.Set(float64(info.NCPU))
engineMemory.Set(float64(info.MemTotal))
logrus.WithFields(logrus.Fields{
"version": dockerversion.Version,
"commit": dockerversion.GitCommit,
"graphdriver": d.graphDriver,
}).Info("Docker daemon")
return d, nil
}
// DistributionServices returns services controlling daemon storage
func (daemon *Daemon) DistributionServices() images.DistributionServices {
return daemon.imageService.DistributionServices()
}
func (daemon *Daemon) waitForStartupDone() {
<-daemon.startupDone
}
func (daemon *Daemon) shutdownContainer(c *container.Container) error {
stopTimeout := c.StopTimeout()
// If container failed to exit in stopTimeout seconds of SIGTERM, then using the force
if err := daemon.containerStop(c, stopTimeout); err != nil {
return fmt.Errorf("Failed to stop container %s with error: %v", c.ID, err)
}
// Wait without timeout for the container to exit.
// Ignore the result.
<-c.Wait(context.Background(), container.WaitConditionNotRunning)
return nil
}
// ShutdownTimeout returns the timeout (in seconds) before containers are forcibly
// killed during shutdown. The default timeout can be configured both on the daemon
// and per container, and the longest timeout will be used. A grace-period of
// 5 seconds is added to the configured timeout.
//
// A negative (-1) timeout means "indefinitely", which means that containers
// are not forcibly killed, and the daemon shuts down after all containers exit.
func (daemon *Daemon) ShutdownTimeout() int {
shutdownTimeout := daemon.configStore.ShutdownTimeout
if shutdownTimeout < 0 {
return -1
}
if daemon.containers == nil {
return shutdownTimeout
}
graceTimeout := 5
for _, c := range daemon.containers.List() {
stopTimeout := c.StopTimeout()
if stopTimeout < 0 {
return -1
}
if stopTimeout+graceTimeout > shutdownTimeout {
shutdownTimeout = stopTimeout + graceTimeout
}
}
return shutdownTimeout
}
// Shutdown stops the daemon.
func (daemon *Daemon) Shutdown() error {
daemon.shutdown = true
// Keep mounts and networking running on daemon shutdown if
// we are to keep containers running and restore them.
if daemon.configStore.LiveRestoreEnabled && daemon.containers != nil {
// check if there are any running containers, if none we should do some cleanup
if ls, err := daemon.Containers(&types.ContainerListOptions{}); len(ls) != 0 || err != nil {
// metrics plugins still need some cleanup
daemon.cleanupMetricsPlugins()
return nil
}
}
if daemon.containers != nil {
logrus.Debugf("daemon configured with a %d seconds minimum shutdown timeout", daemon.configStore.ShutdownTimeout)
logrus.Debugf("start clean shutdown of all containers with a %d seconds timeout...", daemon.ShutdownTimeout())
daemon.containers.ApplyAll(func(c *container.Container) {
if !c.IsRunning() {
return
}
log := logrus.WithField("container", c.ID)
log.Debug("shutting down container")
if err := daemon.shutdownContainer(c); err != nil {
log.WithError(err).Error("failed to shut down container")
return
}
if mountid, err := daemon.imageService.GetLayerMountID(c.ID); err == nil {
daemon.cleanupMountsByID(mountid)
}
log.Debugf("shut down container")
})
}
if daemon.volumes != nil {
if err := daemon.volumes.Shutdown(); err != nil {
logrus.Errorf("Error shutting down volume store: %v", err)
}
}
if daemon.imageService != nil {
daemon.imageService.Cleanup()
}
// If we are part of a cluster, clean up cluster's stuff
if daemon.clusterProvider != nil {
logrus.Debugf("start clean shutdown of cluster resources...")
daemon.DaemonLeavesCluster()
}
daemon.cleanupMetricsPlugins()
// Shutdown plugins after containers and layerstore. Don't change the order.
daemon.pluginShutdown()
// trigger libnetwork Stop only if it's initialized
if daemon.netController != nil {
daemon.netController.Stop()
}
if daemon.containerdCli != nil {
daemon.containerdCli.Close()
}
if daemon.mdDB != nil {
daemon.mdDB.Close()
}
return daemon.cleanupMounts()
}
// Mount sets container.BaseFS
// (is it not set coming in? why is it unset?)
func (daemon *Daemon) Mount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
dir, err := container.RWLayer.Mount(container.GetMountLabel())
if err != nil {
return err
}
logrus.WithField("container", container.ID).Debugf("container mounted via layerStore: %v", dir)
if container.BaseFS != nil && container.BaseFS.Path() != dir.Path() {
// The mount path reported by the graph driver should always be trusted on Windows, since the
// volume path for a given mounted layer may change over time. This should only be an error
// on non-Windows operating systems.
if runtime.GOOS != "windows" {
daemon.Unmount(container)
return fmt.Errorf("Error: driver %s is returning inconsistent paths for container %s ('%s' then '%s')",
daemon.imageService.GraphDriverName(), container.ID, container.BaseFS, dir)
}
}
container.BaseFS = dir // TODO: combine these fields
return nil
}
// Unmount unsets the container base filesystem
func (daemon *Daemon) Unmount(container *container.Container) error {
if container.RWLayer == nil {
return errors.New("RWLayer of container " + container.ID + " is unexpectedly nil")
}
if err := container.RWLayer.Unmount(); err != nil {
logrus.WithField("container", container.ID).WithError(err).Error("error unmounting container")
return err
}
return nil
}
// Subnets return the IPv4 and IPv6 subnets of networks that are manager by Docker.
func (daemon *Daemon) Subnets() ([]net.IPNet, []net.IPNet) {
var v4Subnets []net.IPNet
var v6Subnets []net.IPNet
managedNetworks := daemon.netController.Networks()
for _, managedNetwork := range managedNetworks {
v4infos, v6infos := managedNetwork.Info().IpamInfo()
for _, info := range v4infos {
if info.IPAMData.Pool != nil {
v4Subnets = append(v4Subnets, *info.IPAMData.Pool)
}
}
for _, info := range v6infos {
if info.IPAMData.Pool != nil {
v6Subnets = append(v6Subnets, *info.IPAMData.Pool)
}
}
}
return v4Subnets, v6Subnets
}
// prepareTempDir prepares and returns the default directory to use
// for temporary files.
// If it doesn't exist, it is created. If it exists, its content is removed.
func prepareTempDir(rootDir string) (string, error) {
var tmpDir string
if tmpDir = os.Getenv("DOCKER_TMPDIR"); tmpDir == "" {
tmpDir = filepath.Join(rootDir, "tmp")
newName := tmpDir + "-old"
if err := os.Rename(tmpDir, newName); err == nil {
go func() {
if err := os.RemoveAll(newName); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", newName)
}
}()
} else if !os.IsNotExist(err) {
logrus.Warnf("failed to rename %s for background deletion: %s. Deleting synchronously", tmpDir, err)
if err := os.RemoveAll(tmpDir); err != nil {
logrus.Warnf("failed to delete old tmp directory: %s", tmpDir)
}
}
}
return tmpDir, idtools.MkdirAllAndChown(tmpDir, 0700, idtools.CurrentIdentity())
}
func (daemon *Daemon) setGenericResources(conf *config.Config) error {
genericResources, err := config.ParseGenericResources(conf.NodeGenericResources)
if err != nil {
return err
}
daemon.genericResources = genericResources
return nil
}
func setDefaultMtu(conf *config.Config) {
// do nothing if the config does not have the default 0 value.
if conf.Mtu != 0 {
return
}
conf.Mtu = config.DefaultNetworkMtu
}
// IsShuttingDown tells whether the daemon is shutting down or not
func (daemon *Daemon) IsShuttingDown() bool {
return daemon.shutdown
}
// initDiscovery initializes the discovery watcher for this daemon.
func (daemon *Daemon) initDiscovery(conf *config.Config) error {
advertise, err := config.ParseClusterAdvertiseSettings(conf.ClusterStore, conf.ClusterAdvertise)
if err != nil {
if err == discovery.ErrDiscoveryDisabled {
return nil
}
return err
}
conf.ClusterAdvertise = advertise
discoveryWatcher, err := discovery.Init(conf.ClusterStore, conf.ClusterAdvertise, conf.ClusterOpts)
if err != nil {
return fmt.Errorf("discovery initialization failed (%v)", err)
}
daemon.discoveryWatcher = discoveryWatcher
return nil
}
func isBridgeNetworkDisabled(conf *config.Config) bool {
return conf.BridgeConfig.Iface == config.DisableNetworkBridge
}
func (daemon *Daemon) networkOptions(dconfig *config.Config, pg plugingetter.PluginGetter, activeSandboxes map[string]interface{}) ([]nwconfig.Option, error) {
options := []nwconfig.Option{}
if dconfig == nil {
return options, nil
}
options = append(options, nwconfig.OptionExperimental(dconfig.Experimental))
options = append(options, nwconfig.OptionDataDir(dconfig.Root))
options = append(options, nwconfig.OptionExecRoot(dconfig.GetExecRoot()))
dd := runconfig.DefaultDaemonNetworkMode()
dn := runconfig.DefaultDaemonNetworkMode().NetworkName()
options = append(options, nwconfig.OptionDefaultDriver(string(dd)))
options = append(options, nwconfig.OptionDefaultNetwork(dn))
if strings.TrimSpace(dconfig.ClusterStore) != "" {
kv := strings.Split(dconfig.ClusterStore, "://")
if len(kv) != 2 {
return nil, errors.New("kv store daemon config must be of the form KV-PROVIDER://KV-URL")
}
options = append(options, nwconfig.OptionKVProvider(kv[0]))
options = append(options, nwconfig.OptionKVProviderURL(kv[1]))
}
if len(dconfig.ClusterOpts) > 0 {
options = append(options, nwconfig.OptionKVOpts(dconfig.ClusterOpts))
}
if daemon.discoveryWatcher != nil {
options = append(options, nwconfig.OptionDiscoveryWatcher(daemon.discoveryWatcher))
}
if dconfig.ClusterAdvertise != "" {
options = append(options, nwconfig.OptionDiscoveryAddress(dconfig.ClusterAdvertise))
}
options = append(options, nwconfig.OptionLabels(dconfig.Labels))
options = append(options, driverOptions(dconfig)...)
if len(dconfig.NetworkConfig.DefaultAddressPools.Value()) > 0 {
options = append(options, nwconfig.OptionDefaultAddressPoolConfig(dconfig.NetworkConfig.DefaultAddressPools.Value()))
}
if daemon.configStore != nil && daemon.configStore.LiveRestoreEnabled && len(activeSandboxes) != 0 {
options = append(options, nwconfig.OptionActiveSandboxes(activeSandboxes))
}
if pg != nil {
options = append(options, nwconfig.OptionPluginGetter(pg))
}
options = append(options, nwconfig.OptionNetworkControlPlaneMTU(dconfig.NetworkControlPlaneMTU))
return options, nil
}
// GetCluster returns the cluster
func (daemon *Daemon) GetCluster() Cluster {
return daemon.cluster
}
// SetCluster sets the cluster
func (daemon *Daemon) SetCluster(cluster Cluster) {
daemon.cluster = cluster
}
func (daemon *Daemon) pluginShutdown() {
manager := daemon.pluginManager
// Check for a valid manager object. In error conditions, daemon init can fail
// and shutdown called, before plugin manager is initialized.
if manager != nil {
manager.Shutdown()
}
}
// PluginManager returns current pluginManager associated with the daemon
func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon to avoid this method
return daemon.pluginManager
}
// PluginGetter returns current pluginStore associated with the daemon
func (daemon *Daemon) PluginGetter() *plugin.Store {
return daemon.PluginStore
}
// CreateDaemonRoot creates the root for the daemon
func CreateDaemonRoot(config *config.Config) error {
// get the canonical path to the Docker root directory
var realRoot string
if _, err := os.Stat(config.Root); err != nil && os.IsNotExist(err) {
realRoot = config.Root
} else {
realRoot, err = fileutils.ReadSymlinkedDirectory(config.Root)
if err != nil {
return fmt.Errorf("Unable to get the full path to root (%s): %s", config.Root, err)
}
}
idMapping, err := setupRemappedRoot(config)
if err != nil {
return err
}
return setupDaemonRoot(config, realRoot, idMapping.RootPair())
}
// checkpointAndSave grabs a container lock to safely call container.CheckpointTo
func (daemon *Daemon) checkpointAndSave(container *container.Container) error {
container.Lock()
defer container.Unlock()
if err := container.CheckpointTo(daemon.containersReplica); err != nil {
return fmt.Errorf("Error saving container state: %v", err)
}
return nil
}
// because the CLI sends a -1 when it wants to unset the swappiness value
// we need to clear it on the server side
func fixMemorySwappiness(resources *containertypes.Resources) {
if resources.MemorySwappiness != nil && *resources.MemorySwappiness == -1 {
resources.MemorySwappiness = nil
}
}
// GetAttachmentStore returns current attachment store associated with the daemon
func (daemon *Daemon) GetAttachmentStore() *network.AttachmentStore {
return &daemon.attachmentStore
}
// IdentityMapping returns uid/gid mapping or a SID (in the case of Windows) for the builder
func (daemon *Daemon) IdentityMapping() *idtools.IdentityMapping {
return daemon.idMapping
}
// ImageService returns the Daemon's ImageService
func (daemon *Daemon) ImageService() *images.ImageService {
return daemon.imageService
}
// BuilderBackend returns the backend used by builder
func (daemon *Daemon) BuilderBackend() builder.Backend {
return struct {
*Daemon
*images.ImageService
}{daemon, daemon.imageService}
}
| m-k8s | 3e152513b2f245ab4f7f8a2fe735b0e90d961a61 | a80c450fb368581d58789a64e2fe3458792b9691 | Yes, I think we might as well switch back to what we had (to keep the diff small), and after that have a look at how we can refactor this code to make it cleaner/better (not as part of this PR) | thaJeztah | 5,035 |
moby/moby | 41,912 | builder: produce error when using unsupported Dockerfile option | fixes https://github.com/moby/moby/issues/41911
depends on
- [x] https://github.com/moby/moby/pull/42056 vendor: github.com/moby/buildkit v0.8.2
- [x] depends on https://github.com/moby/buildkit/pull/1954 / https://github.com/moby/buildkit/pull/1971
### builder: produce error when using unsupported Dockerfile option
With the promotion of the experimental Dockerfile syntax to "stable", the Dockerfile
syntax now includes some options that are supported by BuildKit, but not (yet)
supported in the classic builder.
As a result, parsing a Dockerfile may succeed, but any flag that's known to BuildKit,
but not supported by the classic builder is silently ignored;
$ mkdir buildkit_flags && cd buildkit_flags
$ touch foo.txt
For example, `RUN --mount`:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
---> Running in 022fdb856bc8
hello
Removing intermediate container 022fdb856bc8
---> e9f0988844d1
Successfully built e9f0988844d1
Or `COPY --chmod` (same for `ADD --chmod`):
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
---> 8b7117932a2a
Successfully built 8b7117932a2a
Note that unknown flags still produce and error, for example, the below fails because `--hello` is an unknown flag;
DOCKER_BUILDKIT=0 docker build -<<EOF
FROM busybox
RUN --hello echo hello
EOF
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 2: Unknown flag: hello
With this patch applied
----------------------------
With this patch applied, flags that are known in the Dockerfile spec, but are not
supported by the classic builder, produce an error, which includes a link to the
documentation how to enable BuildKit:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
the --mount option BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
```
Fix classic builder silently ignoring unsupported Dockerfile options
```
| null | 2021-01-21 12:30:09+00:00 | 2021-03-24 21:30:45+00:00 | builder/dockerfile/dispatchers.go | package dockerfile // import "github.com/docker/docker/builder/dockerfile"
// This file contains the dispatchers for each command. Note that
// `nullDispatch` is not actually a command, but support for commands we parse
// but do nothing with.
//
// See evaluator.go for a higher level discussion of the whole evaluator
// package.
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"github.com/containerd/containerd/platforms"
"github.com/docker/docker/api"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// ENV foo bar
//
// Sets the environment variable foo to bar, also makes interpolation
// in the dockerfile available from the next statement on via ${foo}.
//
func dispatchEnv(d dispatchRequest, c *instructions.EnvCommand) error {
runConfig := d.state.runConfig
commitMessage := bytes.NewBufferString("ENV")
for _, e := range c.Env {
name := e.Key
newVar := e.String()
commitMessage.WriteString(" " + newVar)
gotOne := false
for i, envVar := range runConfig.Env {
envParts := strings.SplitN(envVar, "=", 2)
compareFrom := envParts[0]
if shell.EqualEnvKeys(compareFrom, name) {
runConfig.Env[i] = newVar
gotOne = true
break
}
}
if !gotOne {
runConfig.Env = append(runConfig.Env, newVar)
}
}
return d.builder.commit(d.state, commitMessage.String())
}
// MAINTAINER some text <[email protected]>
//
// Sets the maintainer metadata.
func dispatchMaintainer(d dispatchRequest, c *instructions.MaintainerCommand) error {
d.state.maintainer = c.Maintainer
return d.builder.commit(d.state, "MAINTAINER "+c.Maintainer)
}
// LABEL some json data describing the image
//
// Sets the Label variable foo to bar,
//
func dispatchLabel(d dispatchRequest, c *instructions.LabelCommand) error {
if d.state.runConfig.Labels == nil {
d.state.runConfig.Labels = make(map[string]string)
}
commitStr := "LABEL"
for _, v := range c.Labels {
d.state.runConfig.Labels[v.Key] = v.Value
commitStr += " " + v.String()
}
return d.builder.commit(d.state, commitStr)
}
// ADD foo /path
//
// Add the file 'foo' to '/path'. Tarball and Remote URL (http, https) handling
// exist here. If you do not wish to have this automatic handling, use COPY.
//
func dispatchAdd(d dispatchRequest, c *instructions.AddCommand) error {
downloader := newRemoteSourceDownloader(d.builder.Output, d.builder.Stdout)
copier := copierFromDispatchRequest(d, downloader, nil)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "ADD")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
copyInstruction.allowLocalDecompression = true
return d.builder.performCopy(d, copyInstruction)
}
// COPY foo /path
//
// Same as 'ADD' but without the tar and remote url handling.
//
func dispatchCopy(d dispatchRequest, c *instructions.CopyCommand) error {
var im *imageMount
var err error
if c.From != "" {
im, err = d.getImageMount(c.From)
if err != nil {
return errors.Wrapf(err, "invalid from flag value %s", c.From)
}
}
copier := copierFromDispatchRequest(d, errOnSourceDownload, im)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "COPY")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
if c.From != "" && copyInstruction.chownStr == "" {
copyInstruction.preserveOwnership = true
}
return d.builder.performCopy(d, copyInstruction)
}
func (d *dispatchRequest) getImageMount(imageRefOrID string) (*imageMount, error) {
if imageRefOrID == "" {
// TODO: this could return the source in the default case as well?
return nil, nil
}
var localOnly bool
stage, err := d.stages.get(imageRefOrID)
if err != nil {
return nil, err
}
if stage != nil {
imageRefOrID = stage.Image
localOnly = true
}
return d.builder.imageSources.Get(imageRefOrID, localOnly, d.builder.platform)
}
// FROM [--platform=platform] imagename[:tag | @digest] [AS build-stage-name]
//
func initializeStage(d dispatchRequest, cmd *instructions.Stage) error {
d.builder.imageProber.Reset()
var platform *specs.Platform
if v := cmd.Platform; v != "" {
v, err := d.getExpandedString(d.shlex, v)
if err != nil {
return errors.Wrapf(err, "failed to process arguments for platform %s", v)
}
p, err := platforms.Parse(v)
if err != nil {
return errors.Wrapf(err, "failed to parse platform %s", v)
}
if err := system.ValidatePlatform(p); err != nil {
return err
}
platform = &p
}
image, err := d.getFromImage(d.shlex, cmd.BaseName, platform)
if err != nil {
return err
}
state := d.state
if err := state.beginStage(cmd.Name, image); err != nil {
return err
}
if len(state.runConfig.OnBuild) > 0 {
triggers := state.runConfig.OnBuild
state.runConfig.OnBuild = nil
return dispatchTriggeredOnBuild(d, triggers)
}
return nil
}
func dispatchTriggeredOnBuild(d dispatchRequest, triggers []string) error {
fmt.Fprintf(d.builder.Stdout, "# Executing %d build trigger", len(triggers))
if len(triggers) > 1 {
fmt.Fprint(d.builder.Stdout, "s")
}
fmt.Fprintln(d.builder.Stdout)
for _, trigger := range triggers {
d.state.updateRunConfig()
ast, err := parser.Parse(strings.NewReader(trigger))
if err != nil {
return err
}
if len(ast.AST.Children) != 1 {
return errors.New("onbuild trigger should be a single expression")
}
cmd, err := instructions.ParseCommand(ast.AST.Children[0])
if err != nil {
var uiErr *instructions.UnknownInstruction
if errors.As(err, &uiErr) {
buildsFailed.WithValues(metricsUnknownInstructionError).Inc()
}
return err
}
err = dispatch(d, cmd)
if err != nil {
return err
}
}
return nil
}
func (d *dispatchRequest) getExpandedString(shlex *shell.Lex, str string) (string, error) {
substitutionArgs := []string{}
for key, value := range d.state.buildArgs.GetAllMeta() {
substitutionArgs = append(substitutionArgs, key+"="+value)
}
name, err := shlex.ProcessWord(str, substitutionArgs)
if err != nil {
return "", err
}
return name, nil
}
func (d *dispatchRequest) getImageOrStage(name string, platform *specs.Platform) (builder.Image, error) {
var localOnly bool
if im, ok := d.stages.getByName(name); ok {
name = im.Image
localOnly = true
}
if platform == nil {
platform = d.builder.platform
}
// Windows cannot support a container with no base image unless it is LCOW.
if name == api.NoBaseImageSpecifier {
p := platforms.DefaultSpec()
if platform != nil {
p = *platform
}
imageImage := &image.Image{}
imageImage.OS = p.OS
// old windows scratch handling
// TODO: scratch should not have an os. It should be nil image.
// Windows supports scratch. What is not supported is running containers
// from it.
if runtime.GOOS == "windows" {
if platform == nil || platform.OS == "linux" {
if !system.LCOWSupported() {
return nil, errors.New("Linux containers are not supported on this system")
}
imageImage.OS = "linux"
} else if platform.OS == "windows" {
return nil, errors.New("Windows does not support FROM scratch")
} else {
return nil, errors.Errorf("platform %s is not supported", platforms.Format(p))
}
}
return builder.Image(imageImage), nil
}
imageMount, err := d.builder.imageSources.Get(name, localOnly, platform)
if err != nil {
return nil, err
}
return imageMount.Image(), nil
}
func (d *dispatchRequest) getFromImage(shlex *shell.Lex, basename string, platform *specs.Platform) (builder.Image, error) {
name, err := d.getExpandedString(shlex, basename)
if err != nil {
return nil, err
}
// Empty string is interpreted to FROM scratch by images.GetImageAndReleasableLayer,
// so validate expanded result is not empty.
if name == "" {
return nil, errors.Errorf("base name (%s) should not be blank", basename)
}
return d.getImageOrStage(name, platform)
}
func dispatchOnbuild(d dispatchRequest, c *instructions.OnbuildCommand) error {
d.state.runConfig.OnBuild = append(d.state.runConfig.OnBuild, c.Expression)
return d.builder.commit(d.state, "ONBUILD "+c.Expression)
}
// WORKDIR /tmp
//
// Set the working directory for future RUN/CMD/etc statements.
//
func dispatchWorkdir(d dispatchRequest, c *instructions.WorkdirCommand) error {
runConfig := d.state.runConfig
var err error
runConfig.WorkingDir, err = normalizeWorkdir(d.state.operatingSystem, runConfig.WorkingDir, c.Path)
if err != nil {
return err
}
// For performance reasons, we explicitly do a create/mkdir now
// This avoids having an unnecessary expensive mount/unmount calls
// (on Windows in particular) during each container create.
// Prior to 1.13, the mkdir was deferred and not executed at this step.
if d.builder.disableCommit {
// Don't call back into the daemon if we're going through docker commit --change "WORKDIR /foo".
// We've already updated the runConfig and that's enough.
return nil
}
comment := "WORKDIR " + runConfig.WorkingDir
runConfigWithCommentCmd := copyRunConfig(runConfig, withCmdCommentString(comment, d.state.operatingSystem))
containerID, err := d.builder.probeAndCreate(d.state, runConfigWithCommentCmd)
if err != nil || containerID == "" {
return err
}
if err := d.builder.docker.ContainerCreateWorkdir(containerID); err != nil {
return err
}
return d.builder.commitContainer(d.state, containerID, runConfigWithCommentCmd)
}
// RUN some command yo
//
// run a command and commit the image. Args are automatically prepended with
// the current SHELL which defaults to 'sh -c' under linux or 'cmd /S /C' under
// Windows, in the event there is only one argument The difference in processing:
//
// RUN echo hi # sh -c echo hi (Linux and LCOW)
// RUN echo hi # cmd /S /C echo hi (Windows)
// RUN [ "echo", "hi" ] # echo hi
//
func dispatchRun(d dispatchRequest, c *instructions.RunCommand) error {
if !system.IsOSSupported(d.state.operatingSystem) {
return system.ErrNotSupportedOperatingSystem
}
stateRunConfig := d.state.runConfig
cmdFromArgs, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, stateRunConfig, d.state.operatingSystem, c.Name(), c.String())
buildArgs := d.state.buildArgs.FilterAllowed(stateRunConfig.Env)
saveCmd := cmdFromArgs
if len(buildArgs) > 0 {
saveCmd = prependEnvOnCmd(d.state.buildArgs, buildArgs, cmdFromArgs)
}
runConfigForCacheProbe := copyRunConfig(stateRunConfig,
withCmd(saveCmd),
withArgsEscaped(argsEscaped),
withEntrypointOverride(saveCmd, nil))
if hit, err := d.builder.probeCache(d.state, runConfigForCacheProbe); err != nil || hit {
return err
}
runConfig := copyRunConfig(stateRunConfig,
withCmd(cmdFromArgs),
withArgsEscaped(argsEscaped),
withEnv(append(stateRunConfig.Env, buildArgs...)),
withEntrypointOverride(saveCmd, strslice.StrSlice{""}),
withoutHealthcheck())
cID, err := d.builder.create(runConfig)
if err != nil {
return err
}
if err := d.builder.containerManager.Run(d.builder.clientCtx, cID, d.builder.Stdout, d.builder.Stderr); err != nil {
if err, ok := err.(*statusCodeError); ok {
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
msg := fmt.Sprintf(
"The command '%s' returned a non-zero code: %d",
strings.Join(runConfig.Cmd, " "), err.StatusCode())
if err.Error() != "" {
msg = fmt.Sprintf("%s: %s", msg, err.Error())
}
return &jsonmessage.JSONError{
Message: msg,
Code: err.StatusCode(),
}
}
return err
}
// Don't persist the argsEscaped value in the committed image. Use the original
// from previous build steps (only CMD and ENTRYPOINT persist this).
if d.state.operatingSystem == "windows" {
runConfigForCacheProbe.ArgsEscaped = stateRunConfig.ArgsEscaped
}
return d.builder.commitContainer(d.state, cID, runConfigForCacheProbe)
}
// Derive the command to use for probeCache() and to commit in this container.
// Note that we only do this if there are any build-time env vars. Also, we
// use the special argument "|#" at the start of the args array. This will
// avoid conflicts with any RUN command since commands can not
// start with | (vertical bar). The "#" (number of build envs) is there to
// help ensure proper cache matches. We don't want a RUN command
// that starts with "foo=abc" to be considered part of a build-time env var.
//
// remove any unreferenced built-in args from the environment variables.
// These args are transparent so resulting image should be the same regardless
// of the value.
func prependEnvOnCmd(buildArgs *BuildArgs, buildArgVars []string, cmd strslice.StrSlice) strslice.StrSlice {
var tmpBuildEnv []string
for _, env := range buildArgVars {
key := strings.SplitN(env, "=", 2)[0]
if buildArgs.IsReferencedOrNotBuiltin(key) {
tmpBuildEnv = append(tmpBuildEnv, env)
}
}
sort.Strings(tmpBuildEnv)
tmpEnv := append([]string{fmt.Sprintf("|%d", len(tmpBuildEnv))}, tmpBuildEnv...)
return strslice.StrSlice(append(tmpEnv, cmd...))
}
// CMD foo
//
// Set the default command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchCmd(d dispatchRequest, c *instructions.CmdCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// We warn here as Windows shell processing operates differently to Linux.
// Linux: /bin/sh -c "echo hello" world --> hello
// Windows: cmd /s /c "echo hello" world --> hello world
if d.state.operatingSystem == "windows" &&
len(runConfig.Entrypoint) > 0 &&
d.state.runConfig.ArgsEscaped != argsEscaped {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form ENTRYPOINT and exec-form CMD may have unexpected results\n")
}
runConfig.Cmd = cmd
runConfig.ArgsEscaped = argsEscaped
if err := d.builder.commit(d.state, fmt.Sprintf("CMD %q", cmd)); err != nil {
return err
}
if len(c.ShellDependantCmdLine.CmdLine) != 0 {
d.state.cmdSet = true
}
return nil
}
// HEALTHCHECK foo
//
// Set the default healthcheck command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchHealthcheck(d dispatchRequest, c *instructions.HealthCheckCommand) error {
runConfig := d.state.runConfig
if runConfig.Healthcheck != nil {
oldCmd := runConfig.Healthcheck.Test
if len(oldCmd) > 0 && oldCmd[0] != "NONE" {
fmt.Fprintf(d.builder.Stdout, "Note: overriding previous HEALTHCHECK: %v\n", oldCmd)
}
}
runConfig.Healthcheck = c.Health
return d.builder.commit(d.state, fmt.Sprintf("HEALTHCHECK %q", runConfig.Healthcheck))
}
// ENTRYPOINT /usr/sbin/nginx
//
// Set the entrypoint to /usr/sbin/nginx. Will accept the CMD as the arguments
// to /usr/sbin/nginx. Uses the default shell if not in JSON format.
//
// Handles command processing similar to CMD and RUN, only req.runConfig.Entrypoint
// is initialized at newBuilder time instead of through argument parsing.
//
func dispatchEntrypoint(d dispatchRequest, c *instructions.EntrypointCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// This warning is a little more complex than in dispatchCmd(), as the Windows base images (similar
// universally to almost every Linux image out there) have a single .Cmd field populated so that
// `docker run --rm image` starts the default shell which would typically be sh on Linux,
// or cmd on Windows. The catch to this is that if a dockerfile had `CMD ["c:\\windows\\system32\\cmd.exe"]`,
// we wouldn't be able to tell the difference. However, that would be highly unlikely, and besides, this
// is only trying to give a helpful warning of possibly unexpected results.
if d.state.operatingSystem == "windows" &&
d.state.runConfig.ArgsEscaped != argsEscaped &&
((len(runConfig.Cmd) == 1 && strings.ToLower(runConfig.Cmd[0]) != `c:\windows\system32\cmd.exe` && len(runConfig.Shell) == 0) || (len(runConfig.Cmd) > 1)) {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form CMD and exec-form ENTRYPOINT may have unexpected results\n")
}
runConfig.Entrypoint = cmd
runConfig.ArgsEscaped = argsEscaped
if !d.state.cmdSet {
runConfig.Cmd = nil
}
return d.builder.commit(d.state, fmt.Sprintf("ENTRYPOINT %q", runConfig.Entrypoint))
}
// EXPOSE 6667/tcp 7000/tcp
//
// Expose ports for links and port mappings. This all ends up in
// req.runConfig.ExposedPorts for runconfig.
//
func dispatchExpose(d dispatchRequest, c *instructions.ExposeCommand, envs []string) error {
// custom multi word expansion
// expose $FOO with FOO="80 443" is expanded as EXPOSE [80,443]. This is the only command supporting word to words expansion
// so the word processing has been de-generalized
ports := []string{}
for _, p := range c.Ports {
ps, err := d.shlex.ProcessWords(p, envs)
if err != nil {
return err
}
ports = append(ports, ps...)
}
c.Ports = ports
ps, _, err := nat.ParsePortSpecs(ports)
if err != nil {
return err
}
if d.state.runConfig.ExposedPorts == nil {
d.state.runConfig.ExposedPorts = make(nat.PortSet)
}
for p := range ps {
d.state.runConfig.ExposedPorts[p] = struct{}{}
}
return d.builder.commit(d.state, "EXPOSE "+strings.Join(c.Ports, " "))
}
// USER foo
//
// Set the user to 'foo' for future commands and when running the
// ENTRYPOINT/CMD at container run time.
//
func dispatchUser(d dispatchRequest, c *instructions.UserCommand) error {
d.state.runConfig.User = c.User
return d.builder.commit(d.state, fmt.Sprintf("USER %v", c.User))
}
// VOLUME /foo
//
// Expose the volume /foo for use. Will also accept the JSON array form.
//
func dispatchVolume(d dispatchRequest, c *instructions.VolumeCommand) error {
if d.state.runConfig.Volumes == nil {
d.state.runConfig.Volumes = map[string]struct{}{}
}
for _, v := range c.Volumes {
if v == "" {
return errors.New("VOLUME specified can not be an empty string")
}
d.state.runConfig.Volumes[v] = struct{}{}
}
return d.builder.commit(d.state, fmt.Sprintf("VOLUME %v", c.Volumes))
}
// STOPSIGNAL signal
//
// Set the signal that will be used to kill the container.
func dispatchStopSignal(d dispatchRequest, c *instructions.StopSignalCommand) error {
_, err := signal.ParseSignal(c.Signal)
if err != nil {
return errdefs.InvalidParameter(err)
}
d.state.runConfig.StopSignal = c.Signal
return d.builder.commit(d.state, fmt.Sprintf("STOPSIGNAL %v", c.Signal))
}
// ARG name[=value]
//
// Adds the variable foo to the trusted list of variables that can be passed
// to builder using the --build-arg flag for expansion/substitution or passing to 'run'.
// Dockerfile author may optionally set a default value of this variable.
func dispatchArg(d dispatchRequest, c *instructions.ArgCommand) error {
var commitStr strings.Builder
commitStr.WriteString("ARG ")
for i, arg := range c.Args {
if i > 0 {
commitStr.WriteString(" ")
}
commitStr.WriteString(arg.Key)
if arg.Value != nil {
commitStr.WriteString("=")
commitStr.WriteString(*arg.Value)
}
d.state.buildArgs.AddArg(arg.Key, arg.Value)
}
return d.builder.commit(d.state, commitStr.String())
}
// SHELL powershell -command
//
// Set the non-default shell to use.
func dispatchShell(d dispatchRequest, c *instructions.ShellCommand) error {
d.state.runConfig.Shell = c.Shell
return d.builder.commit(d.state, fmt.Sprintf("SHELL %v", d.state.runConfig.Shell))
}
| package dockerfile // import "github.com/docker/docker/builder/dockerfile"
// This file contains the dispatchers for each command. Note that
// `nullDispatch` is not actually a command, but support for commands we parse
// but do nothing with.
//
// See evaluator.go for a higher level discussion of the whole evaluator
// package.
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"github.com/containerd/containerd/platforms"
"github.com/docker/docker/api"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// ENV foo bar
//
// Sets the environment variable foo to bar, also makes interpolation
// in the dockerfile available from the next statement on via ${foo}.
//
func dispatchEnv(d dispatchRequest, c *instructions.EnvCommand) error {
runConfig := d.state.runConfig
commitMessage := bytes.NewBufferString("ENV")
for _, e := range c.Env {
name := e.Key
newVar := e.String()
commitMessage.WriteString(" " + newVar)
gotOne := false
for i, envVar := range runConfig.Env {
envParts := strings.SplitN(envVar, "=", 2)
compareFrom := envParts[0]
if shell.EqualEnvKeys(compareFrom, name) {
runConfig.Env[i] = newVar
gotOne = true
break
}
}
if !gotOne {
runConfig.Env = append(runConfig.Env, newVar)
}
}
return d.builder.commit(d.state, commitMessage.String())
}
// MAINTAINER some text <[email protected]>
//
// Sets the maintainer metadata.
func dispatchMaintainer(d dispatchRequest, c *instructions.MaintainerCommand) error {
d.state.maintainer = c.Maintainer
return d.builder.commit(d.state, "MAINTAINER "+c.Maintainer)
}
// LABEL some json data describing the image
//
// Sets the Label variable foo to bar,
//
func dispatchLabel(d dispatchRequest, c *instructions.LabelCommand) error {
if d.state.runConfig.Labels == nil {
d.state.runConfig.Labels = make(map[string]string)
}
commitStr := "LABEL"
for _, v := range c.Labels {
d.state.runConfig.Labels[v.Key] = v.Value
commitStr += " " + v.String()
}
return d.builder.commit(d.state, commitStr)
}
// ADD foo /path
//
// Add the file 'foo' to '/path'. Tarball and Remote URL (http, https) handling
// exist here. If you do not wish to have this automatic handling, use COPY.
//
func dispatchAdd(d dispatchRequest, c *instructions.AddCommand) error {
if c.Chmod != "" {
return errors.New("the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
}
downloader := newRemoteSourceDownloader(d.builder.Output, d.builder.Stdout)
copier := copierFromDispatchRequest(d, downloader, nil)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "ADD")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
copyInstruction.allowLocalDecompression = true
return d.builder.performCopy(d, copyInstruction)
}
// COPY foo /path
//
// Same as 'ADD' but without the tar and remote url handling.
//
func dispatchCopy(d dispatchRequest, c *instructions.CopyCommand) error {
if c.Chmod != "" {
return errors.New("the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
}
var im *imageMount
var err error
if c.From != "" {
im, err = d.getImageMount(c.From)
if err != nil {
return errors.Wrapf(err, "invalid from flag value %s", c.From)
}
}
copier := copierFromDispatchRequest(d, errOnSourceDownload, im)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "COPY")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
if c.From != "" && copyInstruction.chownStr == "" {
copyInstruction.preserveOwnership = true
}
return d.builder.performCopy(d, copyInstruction)
}
func (d *dispatchRequest) getImageMount(imageRefOrID string) (*imageMount, error) {
if imageRefOrID == "" {
// TODO: this could return the source in the default case as well?
return nil, nil
}
var localOnly bool
stage, err := d.stages.get(imageRefOrID)
if err != nil {
return nil, err
}
if stage != nil {
imageRefOrID = stage.Image
localOnly = true
}
return d.builder.imageSources.Get(imageRefOrID, localOnly, d.builder.platform)
}
// FROM [--platform=platform] imagename[:tag | @digest] [AS build-stage-name]
//
func initializeStage(d dispatchRequest, cmd *instructions.Stage) error {
d.builder.imageProber.Reset()
var platform *specs.Platform
if v := cmd.Platform; v != "" {
v, err := d.getExpandedString(d.shlex, v)
if err != nil {
return errors.Wrapf(err, "failed to process arguments for platform %s", v)
}
p, err := platforms.Parse(v)
if err != nil {
return errors.Wrapf(err, "failed to parse platform %s", v)
}
if err := system.ValidatePlatform(p); err != nil {
return err
}
platform = &p
}
image, err := d.getFromImage(d.shlex, cmd.BaseName, platform)
if err != nil {
return err
}
state := d.state
if err := state.beginStage(cmd.Name, image); err != nil {
return err
}
if len(state.runConfig.OnBuild) > 0 {
triggers := state.runConfig.OnBuild
state.runConfig.OnBuild = nil
return dispatchTriggeredOnBuild(d, triggers)
}
return nil
}
func dispatchTriggeredOnBuild(d dispatchRequest, triggers []string) error {
fmt.Fprintf(d.builder.Stdout, "# Executing %d build trigger", len(triggers))
if len(triggers) > 1 {
fmt.Fprint(d.builder.Stdout, "s")
}
fmt.Fprintln(d.builder.Stdout)
for _, trigger := range triggers {
d.state.updateRunConfig()
ast, err := parser.Parse(strings.NewReader(trigger))
if err != nil {
return err
}
if len(ast.AST.Children) != 1 {
return errors.New("onbuild trigger should be a single expression")
}
cmd, err := instructions.ParseCommand(ast.AST.Children[0])
if err != nil {
var uiErr *instructions.UnknownInstruction
if errors.As(err, &uiErr) {
buildsFailed.WithValues(metricsUnknownInstructionError).Inc()
}
return err
}
err = dispatch(d, cmd)
if err != nil {
return err
}
}
return nil
}
func (d *dispatchRequest) getExpandedString(shlex *shell.Lex, str string) (string, error) {
substitutionArgs := []string{}
for key, value := range d.state.buildArgs.GetAllMeta() {
substitutionArgs = append(substitutionArgs, key+"="+value)
}
name, err := shlex.ProcessWord(str, substitutionArgs)
if err != nil {
return "", err
}
return name, nil
}
func (d *dispatchRequest) getImageOrStage(name string, platform *specs.Platform) (builder.Image, error) {
var localOnly bool
if im, ok := d.stages.getByName(name); ok {
name = im.Image
localOnly = true
}
if platform == nil {
platform = d.builder.platform
}
// Windows cannot support a container with no base image unless it is LCOW.
if name == api.NoBaseImageSpecifier {
p := platforms.DefaultSpec()
if platform != nil {
p = *platform
}
imageImage := &image.Image{}
imageImage.OS = p.OS
// old windows scratch handling
// TODO: scratch should not have an os. It should be nil image.
// Windows supports scratch. What is not supported is running containers
// from it.
if runtime.GOOS == "windows" {
if platform == nil || platform.OS == "linux" {
if !system.LCOWSupported() {
return nil, errors.New("Linux containers are not supported on this system")
}
imageImage.OS = "linux"
} else if platform.OS == "windows" {
return nil, errors.New("Windows does not support FROM scratch")
} else {
return nil, errors.Errorf("platform %s is not supported", platforms.Format(p))
}
}
return builder.Image(imageImage), nil
}
imageMount, err := d.builder.imageSources.Get(name, localOnly, platform)
if err != nil {
return nil, err
}
return imageMount.Image(), nil
}
func (d *dispatchRequest) getFromImage(shlex *shell.Lex, basename string, platform *specs.Platform) (builder.Image, error) {
name, err := d.getExpandedString(shlex, basename)
if err != nil {
return nil, err
}
// Empty string is interpreted to FROM scratch by images.GetImageAndReleasableLayer,
// so validate expanded result is not empty.
if name == "" {
return nil, errors.Errorf("base name (%s) should not be blank", basename)
}
return d.getImageOrStage(name, platform)
}
func dispatchOnbuild(d dispatchRequest, c *instructions.OnbuildCommand) error {
d.state.runConfig.OnBuild = append(d.state.runConfig.OnBuild, c.Expression)
return d.builder.commit(d.state, "ONBUILD "+c.Expression)
}
// WORKDIR /tmp
//
// Set the working directory for future RUN/CMD/etc statements.
//
func dispatchWorkdir(d dispatchRequest, c *instructions.WorkdirCommand) error {
runConfig := d.state.runConfig
var err error
runConfig.WorkingDir, err = normalizeWorkdir(d.state.operatingSystem, runConfig.WorkingDir, c.Path)
if err != nil {
return err
}
// For performance reasons, we explicitly do a create/mkdir now
// This avoids having an unnecessary expensive mount/unmount calls
// (on Windows in particular) during each container create.
// Prior to 1.13, the mkdir was deferred and not executed at this step.
if d.builder.disableCommit {
// Don't call back into the daemon if we're going through docker commit --change "WORKDIR /foo".
// We've already updated the runConfig and that's enough.
return nil
}
comment := "WORKDIR " + runConfig.WorkingDir
runConfigWithCommentCmd := copyRunConfig(runConfig, withCmdCommentString(comment, d.state.operatingSystem))
containerID, err := d.builder.probeAndCreate(d.state, runConfigWithCommentCmd)
if err != nil || containerID == "" {
return err
}
if err := d.builder.docker.ContainerCreateWorkdir(containerID); err != nil {
return err
}
return d.builder.commitContainer(d.state, containerID, runConfigWithCommentCmd)
}
// RUN some command yo
//
// run a command and commit the image. Args are automatically prepended with
// the current SHELL which defaults to 'sh -c' under linux or 'cmd /S /C' under
// Windows, in the event there is only one argument The difference in processing:
//
// RUN echo hi # sh -c echo hi (Linux and LCOW)
// RUN echo hi # cmd /S /C echo hi (Windows)
// RUN [ "echo", "hi" ] # echo hi
//
func dispatchRun(d dispatchRequest, c *instructions.RunCommand) error {
if !system.IsOSSupported(d.state.operatingSystem) {
return system.ErrNotSupportedOperatingSystem
}
if len(c.FlagsUsed) > 0 {
// classic builder RUN currently does not support any flags, so fail on the first one
return errors.Errorf("the --%s option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled", c.FlagsUsed[0])
}
stateRunConfig := d.state.runConfig
cmdFromArgs, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, stateRunConfig, d.state.operatingSystem, c.Name(), c.String())
buildArgs := d.state.buildArgs.FilterAllowed(stateRunConfig.Env)
saveCmd := cmdFromArgs
if len(buildArgs) > 0 {
saveCmd = prependEnvOnCmd(d.state.buildArgs, buildArgs, cmdFromArgs)
}
runConfigForCacheProbe := copyRunConfig(stateRunConfig,
withCmd(saveCmd),
withArgsEscaped(argsEscaped),
withEntrypointOverride(saveCmd, nil))
if hit, err := d.builder.probeCache(d.state, runConfigForCacheProbe); err != nil || hit {
return err
}
runConfig := copyRunConfig(stateRunConfig,
withCmd(cmdFromArgs),
withArgsEscaped(argsEscaped),
withEnv(append(stateRunConfig.Env, buildArgs...)),
withEntrypointOverride(saveCmd, strslice.StrSlice{""}),
withoutHealthcheck())
cID, err := d.builder.create(runConfig)
if err != nil {
return err
}
if err := d.builder.containerManager.Run(d.builder.clientCtx, cID, d.builder.Stdout, d.builder.Stderr); err != nil {
if err, ok := err.(*statusCodeError); ok {
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
msg := fmt.Sprintf(
"The command '%s' returned a non-zero code: %d",
strings.Join(runConfig.Cmd, " "), err.StatusCode())
if err.Error() != "" {
msg = fmt.Sprintf("%s: %s", msg, err.Error())
}
return &jsonmessage.JSONError{
Message: msg,
Code: err.StatusCode(),
}
}
return err
}
// Don't persist the argsEscaped value in the committed image. Use the original
// from previous build steps (only CMD and ENTRYPOINT persist this).
if d.state.operatingSystem == "windows" {
runConfigForCacheProbe.ArgsEscaped = stateRunConfig.ArgsEscaped
}
return d.builder.commitContainer(d.state, cID, runConfigForCacheProbe)
}
// Derive the command to use for probeCache() and to commit in this container.
// Note that we only do this if there are any build-time env vars. Also, we
// use the special argument "|#" at the start of the args array. This will
// avoid conflicts with any RUN command since commands can not
// start with | (vertical bar). The "#" (number of build envs) is there to
// help ensure proper cache matches. We don't want a RUN command
// that starts with "foo=abc" to be considered part of a build-time env var.
//
// remove any unreferenced built-in args from the environment variables.
// These args are transparent so resulting image should be the same regardless
// of the value.
func prependEnvOnCmd(buildArgs *BuildArgs, buildArgVars []string, cmd strslice.StrSlice) strslice.StrSlice {
var tmpBuildEnv []string
for _, env := range buildArgVars {
key := strings.SplitN(env, "=", 2)[0]
if buildArgs.IsReferencedOrNotBuiltin(key) {
tmpBuildEnv = append(tmpBuildEnv, env)
}
}
sort.Strings(tmpBuildEnv)
tmpEnv := append([]string{fmt.Sprintf("|%d", len(tmpBuildEnv))}, tmpBuildEnv...)
return strslice.StrSlice(append(tmpEnv, cmd...))
}
// CMD foo
//
// Set the default command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchCmd(d dispatchRequest, c *instructions.CmdCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// We warn here as Windows shell processing operates differently to Linux.
// Linux: /bin/sh -c "echo hello" world --> hello
// Windows: cmd /s /c "echo hello" world --> hello world
if d.state.operatingSystem == "windows" &&
len(runConfig.Entrypoint) > 0 &&
d.state.runConfig.ArgsEscaped != argsEscaped {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form ENTRYPOINT and exec-form CMD may have unexpected results\n")
}
runConfig.Cmd = cmd
runConfig.ArgsEscaped = argsEscaped
if err := d.builder.commit(d.state, fmt.Sprintf("CMD %q", cmd)); err != nil {
return err
}
if len(c.ShellDependantCmdLine.CmdLine) != 0 {
d.state.cmdSet = true
}
return nil
}
// HEALTHCHECK foo
//
// Set the default healthcheck command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchHealthcheck(d dispatchRequest, c *instructions.HealthCheckCommand) error {
runConfig := d.state.runConfig
if runConfig.Healthcheck != nil {
oldCmd := runConfig.Healthcheck.Test
if len(oldCmd) > 0 && oldCmd[0] != "NONE" {
fmt.Fprintf(d.builder.Stdout, "Note: overriding previous HEALTHCHECK: %v\n", oldCmd)
}
}
runConfig.Healthcheck = c.Health
return d.builder.commit(d.state, fmt.Sprintf("HEALTHCHECK %q", runConfig.Healthcheck))
}
// ENTRYPOINT /usr/sbin/nginx
//
// Set the entrypoint to /usr/sbin/nginx. Will accept the CMD as the arguments
// to /usr/sbin/nginx. Uses the default shell if not in JSON format.
//
// Handles command processing similar to CMD and RUN, only req.runConfig.Entrypoint
// is initialized at newBuilder time instead of through argument parsing.
//
func dispatchEntrypoint(d dispatchRequest, c *instructions.EntrypointCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// This warning is a little more complex than in dispatchCmd(), as the Windows base images (similar
// universally to almost every Linux image out there) have a single .Cmd field populated so that
// `docker run --rm image` starts the default shell which would typically be sh on Linux,
// or cmd on Windows. The catch to this is that if a dockerfile had `CMD ["c:\\windows\\system32\\cmd.exe"]`,
// we wouldn't be able to tell the difference. However, that would be highly unlikely, and besides, this
// is only trying to give a helpful warning of possibly unexpected results.
if d.state.operatingSystem == "windows" &&
d.state.runConfig.ArgsEscaped != argsEscaped &&
((len(runConfig.Cmd) == 1 && strings.ToLower(runConfig.Cmd[0]) != `c:\windows\system32\cmd.exe` && len(runConfig.Shell) == 0) || (len(runConfig.Cmd) > 1)) {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form CMD and exec-form ENTRYPOINT may have unexpected results\n")
}
runConfig.Entrypoint = cmd
runConfig.ArgsEscaped = argsEscaped
if !d.state.cmdSet {
runConfig.Cmd = nil
}
return d.builder.commit(d.state, fmt.Sprintf("ENTRYPOINT %q", runConfig.Entrypoint))
}
// EXPOSE 6667/tcp 7000/tcp
//
// Expose ports for links and port mappings. This all ends up in
// req.runConfig.ExposedPorts for runconfig.
//
func dispatchExpose(d dispatchRequest, c *instructions.ExposeCommand, envs []string) error {
// custom multi word expansion
// expose $FOO with FOO="80 443" is expanded as EXPOSE [80,443]. This is the only command supporting word to words expansion
// so the word processing has been de-generalized
ports := []string{}
for _, p := range c.Ports {
ps, err := d.shlex.ProcessWords(p, envs)
if err != nil {
return err
}
ports = append(ports, ps...)
}
c.Ports = ports
ps, _, err := nat.ParsePortSpecs(ports)
if err != nil {
return err
}
if d.state.runConfig.ExposedPorts == nil {
d.state.runConfig.ExposedPorts = make(nat.PortSet)
}
for p := range ps {
d.state.runConfig.ExposedPorts[p] = struct{}{}
}
return d.builder.commit(d.state, "EXPOSE "+strings.Join(c.Ports, " "))
}
// USER foo
//
// Set the user to 'foo' for future commands and when running the
// ENTRYPOINT/CMD at container run time.
//
func dispatchUser(d dispatchRequest, c *instructions.UserCommand) error {
d.state.runConfig.User = c.User
return d.builder.commit(d.state, fmt.Sprintf("USER %v", c.User))
}
// VOLUME /foo
//
// Expose the volume /foo for use. Will also accept the JSON array form.
//
func dispatchVolume(d dispatchRequest, c *instructions.VolumeCommand) error {
if d.state.runConfig.Volumes == nil {
d.state.runConfig.Volumes = map[string]struct{}{}
}
for _, v := range c.Volumes {
if v == "" {
return errors.New("VOLUME specified can not be an empty string")
}
d.state.runConfig.Volumes[v] = struct{}{}
}
return d.builder.commit(d.state, fmt.Sprintf("VOLUME %v", c.Volumes))
}
// STOPSIGNAL signal
//
// Set the signal that will be used to kill the container.
func dispatchStopSignal(d dispatchRequest, c *instructions.StopSignalCommand) error {
_, err := signal.ParseSignal(c.Signal)
if err != nil {
return errdefs.InvalidParameter(err)
}
d.state.runConfig.StopSignal = c.Signal
return d.builder.commit(d.state, fmt.Sprintf("STOPSIGNAL %v", c.Signal))
}
// ARG name[=value]
//
// Adds the variable foo to the trusted list of variables that can be passed
// to builder using the --build-arg flag for expansion/substitution or passing to 'run'.
// Dockerfile author may optionally set a default value of this variable.
func dispatchArg(d dispatchRequest, c *instructions.ArgCommand) error {
var commitStr strings.Builder
commitStr.WriteString("ARG ")
for i, arg := range c.Args {
if i > 0 {
commitStr.WriteString(" ")
}
commitStr.WriteString(arg.Key)
if arg.Value != nil {
commitStr.WriteString("=")
commitStr.WriteString(*arg.Value)
}
d.state.buildArgs.AddArg(arg.Key, arg.Value)
}
return d.builder.commit(d.state, commitStr.String())
}
// SHELL powershell -command
//
// Set the non-default shell to use.
func dispatchShell(d dispatchRequest, c *instructions.ShellCommand) error {
d.state.runConfig.Shell = c.Shell
return d.builder.commit(d.state, fmt.Sprintf("SHELL %v", d.state.runConfig.Shell))
}
| thaJeztah | 08e67904c9f7f7e70d4c3bb688d05301f5fdf7e4 | 797b974cb90e32c7efe9e324d7459122c3f6b7b0 | Perhaps all command should take the same approach; `COPY` and `ADD` have some additional properties to store the `Chmod`, `Chown` values, but other commands may not; perhaps using the `FlagsUsed` approach could make it more generic (we could make a `supportedOptions` variable, containing the supported options per command. | thaJeztah | 5,036 |
moby/moby | 41,912 | builder: produce error when using unsupported Dockerfile option | fixes https://github.com/moby/moby/issues/41911
depends on
- [x] https://github.com/moby/moby/pull/42056 vendor: github.com/moby/buildkit v0.8.2
- [x] depends on https://github.com/moby/buildkit/pull/1954 / https://github.com/moby/buildkit/pull/1971
### builder: produce error when using unsupported Dockerfile option
With the promotion of the experimental Dockerfile syntax to "stable", the Dockerfile
syntax now includes some options that are supported by BuildKit, but not (yet)
supported in the classic builder.
As a result, parsing a Dockerfile may succeed, but any flag that's known to BuildKit,
but not supported by the classic builder is silently ignored;
$ mkdir buildkit_flags && cd buildkit_flags
$ touch foo.txt
For example, `RUN --mount`:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
---> Running in 022fdb856bc8
hello
Removing intermediate container 022fdb856bc8
---> e9f0988844d1
Successfully built e9f0988844d1
Or `COPY --chmod` (same for `ADD --chmod`):
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
---> 8b7117932a2a
Successfully built 8b7117932a2a
Note that unknown flags still produce and error, for example, the below fails because `--hello` is an unknown flag;
DOCKER_BUILDKIT=0 docker build -<<EOF
FROM busybox
RUN --hello echo hello
EOF
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 2: Unknown flag: hello
With this patch applied
----------------------------
With this patch applied, flags that are known in the Dockerfile spec, but are not
supported by the classic builder, produce an error, which includes a link to the
documentation how to enable BuildKit:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
the --mount option BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
```
Fix classic builder silently ignoring unsupported Dockerfile options
```
| null | 2021-01-21 12:30:09+00:00 | 2021-03-24 21:30:45+00:00 | builder/dockerfile/dispatchers.go | package dockerfile // import "github.com/docker/docker/builder/dockerfile"
// This file contains the dispatchers for each command. Note that
// `nullDispatch` is not actually a command, but support for commands we parse
// but do nothing with.
//
// See evaluator.go for a higher level discussion of the whole evaluator
// package.
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"github.com/containerd/containerd/platforms"
"github.com/docker/docker/api"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// ENV foo bar
//
// Sets the environment variable foo to bar, also makes interpolation
// in the dockerfile available from the next statement on via ${foo}.
//
func dispatchEnv(d dispatchRequest, c *instructions.EnvCommand) error {
runConfig := d.state.runConfig
commitMessage := bytes.NewBufferString("ENV")
for _, e := range c.Env {
name := e.Key
newVar := e.String()
commitMessage.WriteString(" " + newVar)
gotOne := false
for i, envVar := range runConfig.Env {
envParts := strings.SplitN(envVar, "=", 2)
compareFrom := envParts[0]
if shell.EqualEnvKeys(compareFrom, name) {
runConfig.Env[i] = newVar
gotOne = true
break
}
}
if !gotOne {
runConfig.Env = append(runConfig.Env, newVar)
}
}
return d.builder.commit(d.state, commitMessage.String())
}
// MAINTAINER some text <[email protected]>
//
// Sets the maintainer metadata.
func dispatchMaintainer(d dispatchRequest, c *instructions.MaintainerCommand) error {
d.state.maintainer = c.Maintainer
return d.builder.commit(d.state, "MAINTAINER "+c.Maintainer)
}
// LABEL some json data describing the image
//
// Sets the Label variable foo to bar,
//
func dispatchLabel(d dispatchRequest, c *instructions.LabelCommand) error {
if d.state.runConfig.Labels == nil {
d.state.runConfig.Labels = make(map[string]string)
}
commitStr := "LABEL"
for _, v := range c.Labels {
d.state.runConfig.Labels[v.Key] = v.Value
commitStr += " " + v.String()
}
return d.builder.commit(d.state, commitStr)
}
// ADD foo /path
//
// Add the file 'foo' to '/path'. Tarball and Remote URL (http, https) handling
// exist here. If you do not wish to have this automatic handling, use COPY.
//
func dispatchAdd(d dispatchRequest, c *instructions.AddCommand) error {
downloader := newRemoteSourceDownloader(d.builder.Output, d.builder.Stdout)
copier := copierFromDispatchRequest(d, downloader, nil)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "ADD")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
copyInstruction.allowLocalDecompression = true
return d.builder.performCopy(d, copyInstruction)
}
// COPY foo /path
//
// Same as 'ADD' but without the tar and remote url handling.
//
func dispatchCopy(d dispatchRequest, c *instructions.CopyCommand) error {
var im *imageMount
var err error
if c.From != "" {
im, err = d.getImageMount(c.From)
if err != nil {
return errors.Wrapf(err, "invalid from flag value %s", c.From)
}
}
copier := copierFromDispatchRequest(d, errOnSourceDownload, im)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "COPY")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
if c.From != "" && copyInstruction.chownStr == "" {
copyInstruction.preserveOwnership = true
}
return d.builder.performCopy(d, copyInstruction)
}
func (d *dispatchRequest) getImageMount(imageRefOrID string) (*imageMount, error) {
if imageRefOrID == "" {
// TODO: this could return the source in the default case as well?
return nil, nil
}
var localOnly bool
stage, err := d.stages.get(imageRefOrID)
if err != nil {
return nil, err
}
if stage != nil {
imageRefOrID = stage.Image
localOnly = true
}
return d.builder.imageSources.Get(imageRefOrID, localOnly, d.builder.platform)
}
// FROM [--platform=platform] imagename[:tag | @digest] [AS build-stage-name]
//
func initializeStage(d dispatchRequest, cmd *instructions.Stage) error {
d.builder.imageProber.Reset()
var platform *specs.Platform
if v := cmd.Platform; v != "" {
v, err := d.getExpandedString(d.shlex, v)
if err != nil {
return errors.Wrapf(err, "failed to process arguments for platform %s", v)
}
p, err := platforms.Parse(v)
if err != nil {
return errors.Wrapf(err, "failed to parse platform %s", v)
}
if err := system.ValidatePlatform(p); err != nil {
return err
}
platform = &p
}
image, err := d.getFromImage(d.shlex, cmd.BaseName, platform)
if err != nil {
return err
}
state := d.state
if err := state.beginStage(cmd.Name, image); err != nil {
return err
}
if len(state.runConfig.OnBuild) > 0 {
triggers := state.runConfig.OnBuild
state.runConfig.OnBuild = nil
return dispatchTriggeredOnBuild(d, triggers)
}
return nil
}
func dispatchTriggeredOnBuild(d dispatchRequest, triggers []string) error {
fmt.Fprintf(d.builder.Stdout, "# Executing %d build trigger", len(triggers))
if len(triggers) > 1 {
fmt.Fprint(d.builder.Stdout, "s")
}
fmt.Fprintln(d.builder.Stdout)
for _, trigger := range triggers {
d.state.updateRunConfig()
ast, err := parser.Parse(strings.NewReader(trigger))
if err != nil {
return err
}
if len(ast.AST.Children) != 1 {
return errors.New("onbuild trigger should be a single expression")
}
cmd, err := instructions.ParseCommand(ast.AST.Children[0])
if err != nil {
var uiErr *instructions.UnknownInstruction
if errors.As(err, &uiErr) {
buildsFailed.WithValues(metricsUnknownInstructionError).Inc()
}
return err
}
err = dispatch(d, cmd)
if err != nil {
return err
}
}
return nil
}
func (d *dispatchRequest) getExpandedString(shlex *shell.Lex, str string) (string, error) {
substitutionArgs := []string{}
for key, value := range d.state.buildArgs.GetAllMeta() {
substitutionArgs = append(substitutionArgs, key+"="+value)
}
name, err := shlex.ProcessWord(str, substitutionArgs)
if err != nil {
return "", err
}
return name, nil
}
func (d *dispatchRequest) getImageOrStage(name string, platform *specs.Platform) (builder.Image, error) {
var localOnly bool
if im, ok := d.stages.getByName(name); ok {
name = im.Image
localOnly = true
}
if platform == nil {
platform = d.builder.platform
}
// Windows cannot support a container with no base image unless it is LCOW.
if name == api.NoBaseImageSpecifier {
p := platforms.DefaultSpec()
if platform != nil {
p = *platform
}
imageImage := &image.Image{}
imageImage.OS = p.OS
// old windows scratch handling
// TODO: scratch should not have an os. It should be nil image.
// Windows supports scratch. What is not supported is running containers
// from it.
if runtime.GOOS == "windows" {
if platform == nil || platform.OS == "linux" {
if !system.LCOWSupported() {
return nil, errors.New("Linux containers are not supported on this system")
}
imageImage.OS = "linux"
} else if platform.OS == "windows" {
return nil, errors.New("Windows does not support FROM scratch")
} else {
return nil, errors.Errorf("platform %s is not supported", platforms.Format(p))
}
}
return builder.Image(imageImage), nil
}
imageMount, err := d.builder.imageSources.Get(name, localOnly, platform)
if err != nil {
return nil, err
}
return imageMount.Image(), nil
}
func (d *dispatchRequest) getFromImage(shlex *shell.Lex, basename string, platform *specs.Platform) (builder.Image, error) {
name, err := d.getExpandedString(shlex, basename)
if err != nil {
return nil, err
}
// Empty string is interpreted to FROM scratch by images.GetImageAndReleasableLayer,
// so validate expanded result is not empty.
if name == "" {
return nil, errors.Errorf("base name (%s) should not be blank", basename)
}
return d.getImageOrStage(name, platform)
}
func dispatchOnbuild(d dispatchRequest, c *instructions.OnbuildCommand) error {
d.state.runConfig.OnBuild = append(d.state.runConfig.OnBuild, c.Expression)
return d.builder.commit(d.state, "ONBUILD "+c.Expression)
}
// WORKDIR /tmp
//
// Set the working directory for future RUN/CMD/etc statements.
//
func dispatchWorkdir(d dispatchRequest, c *instructions.WorkdirCommand) error {
runConfig := d.state.runConfig
var err error
runConfig.WorkingDir, err = normalizeWorkdir(d.state.operatingSystem, runConfig.WorkingDir, c.Path)
if err != nil {
return err
}
// For performance reasons, we explicitly do a create/mkdir now
// This avoids having an unnecessary expensive mount/unmount calls
// (on Windows in particular) during each container create.
// Prior to 1.13, the mkdir was deferred and not executed at this step.
if d.builder.disableCommit {
// Don't call back into the daemon if we're going through docker commit --change "WORKDIR /foo".
// We've already updated the runConfig and that's enough.
return nil
}
comment := "WORKDIR " + runConfig.WorkingDir
runConfigWithCommentCmd := copyRunConfig(runConfig, withCmdCommentString(comment, d.state.operatingSystem))
containerID, err := d.builder.probeAndCreate(d.state, runConfigWithCommentCmd)
if err != nil || containerID == "" {
return err
}
if err := d.builder.docker.ContainerCreateWorkdir(containerID); err != nil {
return err
}
return d.builder.commitContainer(d.state, containerID, runConfigWithCommentCmd)
}
// RUN some command yo
//
// run a command and commit the image. Args are automatically prepended with
// the current SHELL which defaults to 'sh -c' under linux or 'cmd /S /C' under
// Windows, in the event there is only one argument The difference in processing:
//
// RUN echo hi # sh -c echo hi (Linux and LCOW)
// RUN echo hi # cmd /S /C echo hi (Windows)
// RUN [ "echo", "hi" ] # echo hi
//
func dispatchRun(d dispatchRequest, c *instructions.RunCommand) error {
if !system.IsOSSupported(d.state.operatingSystem) {
return system.ErrNotSupportedOperatingSystem
}
stateRunConfig := d.state.runConfig
cmdFromArgs, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, stateRunConfig, d.state.operatingSystem, c.Name(), c.String())
buildArgs := d.state.buildArgs.FilterAllowed(stateRunConfig.Env)
saveCmd := cmdFromArgs
if len(buildArgs) > 0 {
saveCmd = prependEnvOnCmd(d.state.buildArgs, buildArgs, cmdFromArgs)
}
runConfigForCacheProbe := copyRunConfig(stateRunConfig,
withCmd(saveCmd),
withArgsEscaped(argsEscaped),
withEntrypointOverride(saveCmd, nil))
if hit, err := d.builder.probeCache(d.state, runConfigForCacheProbe); err != nil || hit {
return err
}
runConfig := copyRunConfig(stateRunConfig,
withCmd(cmdFromArgs),
withArgsEscaped(argsEscaped),
withEnv(append(stateRunConfig.Env, buildArgs...)),
withEntrypointOverride(saveCmd, strslice.StrSlice{""}),
withoutHealthcheck())
cID, err := d.builder.create(runConfig)
if err != nil {
return err
}
if err := d.builder.containerManager.Run(d.builder.clientCtx, cID, d.builder.Stdout, d.builder.Stderr); err != nil {
if err, ok := err.(*statusCodeError); ok {
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
msg := fmt.Sprintf(
"The command '%s' returned a non-zero code: %d",
strings.Join(runConfig.Cmd, " "), err.StatusCode())
if err.Error() != "" {
msg = fmt.Sprintf("%s: %s", msg, err.Error())
}
return &jsonmessage.JSONError{
Message: msg,
Code: err.StatusCode(),
}
}
return err
}
// Don't persist the argsEscaped value in the committed image. Use the original
// from previous build steps (only CMD and ENTRYPOINT persist this).
if d.state.operatingSystem == "windows" {
runConfigForCacheProbe.ArgsEscaped = stateRunConfig.ArgsEscaped
}
return d.builder.commitContainer(d.state, cID, runConfigForCacheProbe)
}
// Derive the command to use for probeCache() and to commit in this container.
// Note that we only do this if there are any build-time env vars. Also, we
// use the special argument "|#" at the start of the args array. This will
// avoid conflicts with any RUN command since commands can not
// start with | (vertical bar). The "#" (number of build envs) is there to
// help ensure proper cache matches. We don't want a RUN command
// that starts with "foo=abc" to be considered part of a build-time env var.
//
// remove any unreferenced built-in args from the environment variables.
// These args are transparent so resulting image should be the same regardless
// of the value.
func prependEnvOnCmd(buildArgs *BuildArgs, buildArgVars []string, cmd strslice.StrSlice) strslice.StrSlice {
var tmpBuildEnv []string
for _, env := range buildArgVars {
key := strings.SplitN(env, "=", 2)[0]
if buildArgs.IsReferencedOrNotBuiltin(key) {
tmpBuildEnv = append(tmpBuildEnv, env)
}
}
sort.Strings(tmpBuildEnv)
tmpEnv := append([]string{fmt.Sprintf("|%d", len(tmpBuildEnv))}, tmpBuildEnv...)
return strslice.StrSlice(append(tmpEnv, cmd...))
}
// CMD foo
//
// Set the default command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchCmd(d dispatchRequest, c *instructions.CmdCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// We warn here as Windows shell processing operates differently to Linux.
// Linux: /bin/sh -c "echo hello" world --> hello
// Windows: cmd /s /c "echo hello" world --> hello world
if d.state.operatingSystem == "windows" &&
len(runConfig.Entrypoint) > 0 &&
d.state.runConfig.ArgsEscaped != argsEscaped {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form ENTRYPOINT and exec-form CMD may have unexpected results\n")
}
runConfig.Cmd = cmd
runConfig.ArgsEscaped = argsEscaped
if err := d.builder.commit(d.state, fmt.Sprintf("CMD %q", cmd)); err != nil {
return err
}
if len(c.ShellDependantCmdLine.CmdLine) != 0 {
d.state.cmdSet = true
}
return nil
}
// HEALTHCHECK foo
//
// Set the default healthcheck command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchHealthcheck(d dispatchRequest, c *instructions.HealthCheckCommand) error {
runConfig := d.state.runConfig
if runConfig.Healthcheck != nil {
oldCmd := runConfig.Healthcheck.Test
if len(oldCmd) > 0 && oldCmd[0] != "NONE" {
fmt.Fprintf(d.builder.Stdout, "Note: overriding previous HEALTHCHECK: %v\n", oldCmd)
}
}
runConfig.Healthcheck = c.Health
return d.builder.commit(d.state, fmt.Sprintf("HEALTHCHECK %q", runConfig.Healthcheck))
}
// ENTRYPOINT /usr/sbin/nginx
//
// Set the entrypoint to /usr/sbin/nginx. Will accept the CMD as the arguments
// to /usr/sbin/nginx. Uses the default shell if not in JSON format.
//
// Handles command processing similar to CMD and RUN, only req.runConfig.Entrypoint
// is initialized at newBuilder time instead of through argument parsing.
//
func dispatchEntrypoint(d dispatchRequest, c *instructions.EntrypointCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// This warning is a little more complex than in dispatchCmd(), as the Windows base images (similar
// universally to almost every Linux image out there) have a single .Cmd field populated so that
// `docker run --rm image` starts the default shell which would typically be sh on Linux,
// or cmd on Windows. The catch to this is that if a dockerfile had `CMD ["c:\\windows\\system32\\cmd.exe"]`,
// we wouldn't be able to tell the difference. However, that would be highly unlikely, and besides, this
// is only trying to give a helpful warning of possibly unexpected results.
if d.state.operatingSystem == "windows" &&
d.state.runConfig.ArgsEscaped != argsEscaped &&
((len(runConfig.Cmd) == 1 && strings.ToLower(runConfig.Cmd[0]) != `c:\windows\system32\cmd.exe` && len(runConfig.Shell) == 0) || (len(runConfig.Cmd) > 1)) {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form CMD and exec-form ENTRYPOINT may have unexpected results\n")
}
runConfig.Entrypoint = cmd
runConfig.ArgsEscaped = argsEscaped
if !d.state.cmdSet {
runConfig.Cmd = nil
}
return d.builder.commit(d.state, fmt.Sprintf("ENTRYPOINT %q", runConfig.Entrypoint))
}
// EXPOSE 6667/tcp 7000/tcp
//
// Expose ports for links and port mappings. This all ends up in
// req.runConfig.ExposedPorts for runconfig.
//
func dispatchExpose(d dispatchRequest, c *instructions.ExposeCommand, envs []string) error {
// custom multi word expansion
// expose $FOO with FOO="80 443" is expanded as EXPOSE [80,443]. This is the only command supporting word to words expansion
// so the word processing has been de-generalized
ports := []string{}
for _, p := range c.Ports {
ps, err := d.shlex.ProcessWords(p, envs)
if err != nil {
return err
}
ports = append(ports, ps...)
}
c.Ports = ports
ps, _, err := nat.ParsePortSpecs(ports)
if err != nil {
return err
}
if d.state.runConfig.ExposedPorts == nil {
d.state.runConfig.ExposedPorts = make(nat.PortSet)
}
for p := range ps {
d.state.runConfig.ExposedPorts[p] = struct{}{}
}
return d.builder.commit(d.state, "EXPOSE "+strings.Join(c.Ports, " "))
}
// USER foo
//
// Set the user to 'foo' for future commands and when running the
// ENTRYPOINT/CMD at container run time.
//
func dispatchUser(d dispatchRequest, c *instructions.UserCommand) error {
d.state.runConfig.User = c.User
return d.builder.commit(d.state, fmt.Sprintf("USER %v", c.User))
}
// VOLUME /foo
//
// Expose the volume /foo for use. Will also accept the JSON array form.
//
func dispatchVolume(d dispatchRequest, c *instructions.VolumeCommand) error {
if d.state.runConfig.Volumes == nil {
d.state.runConfig.Volumes = map[string]struct{}{}
}
for _, v := range c.Volumes {
if v == "" {
return errors.New("VOLUME specified can not be an empty string")
}
d.state.runConfig.Volumes[v] = struct{}{}
}
return d.builder.commit(d.state, fmt.Sprintf("VOLUME %v", c.Volumes))
}
// STOPSIGNAL signal
//
// Set the signal that will be used to kill the container.
func dispatchStopSignal(d dispatchRequest, c *instructions.StopSignalCommand) error {
_, err := signal.ParseSignal(c.Signal)
if err != nil {
return errdefs.InvalidParameter(err)
}
d.state.runConfig.StopSignal = c.Signal
return d.builder.commit(d.state, fmt.Sprintf("STOPSIGNAL %v", c.Signal))
}
// ARG name[=value]
//
// Adds the variable foo to the trusted list of variables that can be passed
// to builder using the --build-arg flag for expansion/substitution or passing to 'run'.
// Dockerfile author may optionally set a default value of this variable.
func dispatchArg(d dispatchRequest, c *instructions.ArgCommand) error {
var commitStr strings.Builder
commitStr.WriteString("ARG ")
for i, arg := range c.Args {
if i > 0 {
commitStr.WriteString(" ")
}
commitStr.WriteString(arg.Key)
if arg.Value != nil {
commitStr.WriteString("=")
commitStr.WriteString(*arg.Value)
}
d.state.buildArgs.AddArg(arg.Key, arg.Value)
}
return d.builder.commit(d.state, commitStr.String())
}
// SHELL powershell -command
//
// Set the non-default shell to use.
func dispatchShell(d dispatchRequest, c *instructions.ShellCommand) error {
d.state.runConfig.Shell = c.Shell
return d.builder.commit(d.state, fmt.Sprintf("SHELL %v", d.state.runConfig.Shell))
}
| package dockerfile // import "github.com/docker/docker/builder/dockerfile"
// This file contains the dispatchers for each command. Note that
// `nullDispatch` is not actually a command, but support for commands we parse
// but do nothing with.
//
// See evaluator.go for a higher level discussion of the whole evaluator
// package.
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"github.com/containerd/containerd/platforms"
"github.com/docker/docker/api"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// ENV foo bar
//
// Sets the environment variable foo to bar, also makes interpolation
// in the dockerfile available from the next statement on via ${foo}.
//
func dispatchEnv(d dispatchRequest, c *instructions.EnvCommand) error {
runConfig := d.state.runConfig
commitMessage := bytes.NewBufferString("ENV")
for _, e := range c.Env {
name := e.Key
newVar := e.String()
commitMessage.WriteString(" " + newVar)
gotOne := false
for i, envVar := range runConfig.Env {
envParts := strings.SplitN(envVar, "=", 2)
compareFrom := envParts[0]
if shell.EqualEnvKeys(compareFrom, name) {
runConfig.Env[i] = newVar
gotOne = true
break
}
}
if !gotOne {
runConfig.Env = append(runConfig.Env, newVar)
}
}
return d.builder.commit(d.state, commitMessage.String())
}
// MAINTAINER some text <[email protected]>
//
// Sets the maintainer metadata.
func dispatchMaintainer(d dispatchRequest, c *instructions.MaintainerCommand) error {
d.state.maintainer = c.Maintainer
return d.builder.commit(d.state, "MAINTAINER "+c.Maintainer)
}
// LABEL some json data describing the image
//
// Sets the Label variable foo to bar,
//
func dispatchLabel(d dispatchRequest, c *instructions.LabelCommand) error {
if d.state.runConfig.Labels == nil {
d.state.runConfig.Labels = make(map[string]string)
}
commitStr := "LABEL"
for _, v := range c.Labels {
d.state.runConfig.Labels[v.Key] = v.Value
commitStr += " " + v.String()
}
return d.builder.commit(d.state, commitStr)
}
// ADD foo /path
//
// Add the file 'foo' to '/path'. Tarball and Remote URL (http, https) handling
// exist here. If you do not wish to have this automatic handling, use COPY.
//
func dispatchAdd(d dispatchRequest, c *instructions.AddCommand) error {
if c.Chmod != "" {
return errors.New("the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
}
downloader := newRemoteSourceDownloader(d.builder.Output, d.builder.Stdout)
copier := copierFromDispatchRequest(d, downloader, nil)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "ADD")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
copyInstruction.allowLocalDecompression = true
return d.builder.performCopy(d, copyInstruction)
}
// COPY foo /path
//
// Same as 'ADD' but without the tar and remote url handling.
//
func dispatchCopy(d dispatchRequest, c *instructions.CopyCommand) error {
if c.Chmod != "" {
return errors.New("the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
}
var im *imageMount
var err error
if c.From != "" {
im, err = d.getImageMount(c.From)
if err != nil {
return errors.Wrapf(err, "invalid from flag value %s", c.From)
}
}
copier := copierFromDispatchRequest(d, errOnSourceDownload, im)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "COPY")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
if c.From != "" && copyInstruction.chownStr == "" {
copyInstruction.preserveOwnership = true
}
return d.builder.performCopy(d, copyInstruction)
}
func (d *dispatchRequest) getImageMount(imageRefOrID string) (*imageMount, error) {
if imageRefOrID == "" {
// TODO: this could return the source in the default case as well?
return nil, nil
}
var localOnly bool
stage, err := d.stages.get(imageRefOrID)
if err != nil {
return nil, err
}
if stage != nil {
imageRefOrID = stage.Image
localOnly = true
}
return d.builder.imageSources.Get(imageRefOrID, localOnly, d.builder.platform)
}
// FROM [--platform=platform] imagename[:tag | @digest] [AS build-stage-name]
//
func initializeStage(d dispatchRequest, cmd *instructions.Stage) error {
d.builder.imageProber.Reset()
var platform *specs.Platform
if v := cmd.Platform; v != "" {
v, err := d.getExpandedString(d.shlex, v)
if err != nil {
return errors.Wrapf(err, "failed to process arguments for platform %s", v)
}
p, err := platforms.Parse(v)
if err != nil {
return errors.Wrapf(err, "failed to parse platform %s", v)
}
if err := system.ValidatePlatform(p); err != nil {
return err
}
platform = &p
}
image, err := d.getFromImage(d.shlex, cmd.BaseName, platform)
if err != nil {
return err
}
state := d.state
if err := state.beginStage(cmd.Name, image); err != nil {
return err
}
if len(state.runConfig.OnBuild) > 0 {
triggers := state.runConfig.OnBuild
state.runConfig.OnBuild = nil
return dispatchTriggeredOnBuild(d, triggers)
}
return nil
}
func dispatchTriggeredOnBuild(d dispatchRequest, triggers []string) error {
fmt.Fprintf(d.builder.Stdout, "# Executing %d build trigger", len(triggers))
if len(triggers) > 1 {
fmt.Fprint(d.builder.Stdout, "s")
}
fmt.Fprintln(d.builder.Stdout)
for _, trigger := range triggers {
d.state.updateRunConfig()
ast, err := parser.Parse(strings.NewReader(trigger))
if err != nil {
return err
}
if len(ast.AST.Children) != 1 {
return errors.New("onbuild trigger should be a single expression")
}
cmd, err := instructions.ParseCommand(ast.AST.Children[0])
if err != nil {
var uiErr *instructions.UnknownInstruction
if errors.As(err, &uiErr) {
buildsFailed.WithValues(metricsUnknownInstructionError).Inc()
}
return err
}
err = dispatch(d, cmd)
if err != nil {
return err
}
}
return nil
}
func (d *dispatchRequest) getExpandedString(shlex *shell.Lex, str string) (string, error) {
substitutionArgs := []string{}
for key, value := range d.state.buildArgs.GetAllMeta() {
substitutionArgs = append(substitutionArgs, key+"="+value)
}
name, err := shlex.ProcessWord(str, substitutionArgs)
if err != nil {
return "", err
}
return name, nil
}
func (d *dispatchRequest) getImageOrStage(name string, platform *specs.Platform) (builder.Image, error) {
var localOnly bool
if im, ok := d.stages.getByName(name); ok {
name = im.Image
localOnly = true
}
if platform == nil {
platform = d.builder.platform
}
// Windows cannot support a container with no base image unless it is LCOW.
if name == api.NoBaseImageSpecifier {
p := platforms.DefaultSpec()
if platform != nil {
p = *platform
}
imageImage := &image.Image{}
imageImage.OS = p.OS
// old windows scratch handling
// TODO: scratch should not have an os. It should be nil image.
// Windows supports scratch. What is not supported is running containers
// from it.
if runtime.GOOS == "windows" {
if platform == nil || platform.OS == "linux" {
if !system.LCOWSupported() {
return nil, errors.New("Linux containers are not supported on this system")
}
imageImage.OS = "linux"
} else if platform.OS == "windows" {
return nil, errors.New("Windows does not support FROM scratch")
} else {
return nil, errors.Errorf("platform %s is not supported", platforms.Format(p))
}
}
return builder.Image(imageImage), nil
}
imageMount, err := d.builder.imageSources.Get(name, localOnly, platform)
if err != nil {
return nil, err
}
return imageMount.Image(), nil
}
func (d *dispatchRequest) getFromImage(shlex *shell.Lex, basename string, platform *specs.Platform) (builder.Image, error) {
name, err := d.getExpandedString(shlex, basename)
if err != nil {
return nil, err
}
// Empty string is interpreted to FROM scratch by images.GetImageAndReleasableLayer,
// so validate expanded result is not empty.
if name == "" {
return nil, errors.Errorf("base name (%s) should not be blank", basename)
}
return d.getImageOrStage(name, platform)
}
func dispatchOnbuild(d dispatchRequest, c *instructions.OnbuildCommand) error {
d.state.runConfig.OnBuild = append(d.state.runConfig.OnBuild, c.Expression)
return d.builder.commit(d.state, "ONBUILD "+c.Expression)
}
// WORKDIR /tmp
//
// Set the working directory for future RUN/CMD/etc statements.
//
func dispatchWorkdir(d dispatchRequest, c *instructions.WorkdirCommand) error {
runConfig := d.state.runConfig
var err error
runConfig.WorkingDir, err = normalizeWorkdir(d.state.operatingSystem, runConfig.WorkingDir, c.Path)
if err != nil {
return err
}
// For performance reasons, we explicitly do a create/mkdir now
// This avoids having an unnecessary expensive mount/unmount calls
// (on Windows in particular) during each container create.
// Prior to 1.13, the mkdir was deferred and not executed at this step.
if d.builder.disableCommit {
// Don't call back into the daemon if we're going through docker commit --change "WORKDIR /foo".
// We've already updated the runConfig and that's enough.
return nil
}
comment := "WORKDIR " + runConfig.WorkingDir
runConfigWithCommentCmd := copyRunConfig(runConfig, withCmdCommentString(comment, d.state.operatingSystem))
containerID, err := d.builder.probeAndCreate(d.state, runConfigWithCommentCmd)
if err != nil || containerID == "" {
return err
}
if err := d.builder.docker.ContainerCreateWorkdir(containerID); err != nil {
return err
}
return d.builder.commitContainer(d.state, containerID, runConfigWithCommentCmd)
}
// RUN some command yo
//
// run a command and commit the image. Args are automatically prepended with
// the current SHELL which defaults to 'sh -c' under linux or 'cmd /S /C' under
// Windows, in the event there is only one argument The difference in processing:
//
// RUN echo hi # sh -c echo hi (Linux and LCOW)
// RUN echo hi # cmd /S /C echo hi (Windows)
// RUN [ "echo", "hi" ] # echo hi
//
func dispatchRun(d dispatchRequest, c *instructions.RunCommand) error {
if !system.IsOSSupported(d.state.operatingSystem) {
return system.ErrNotSupportedOperatingSystem
}
if len(c.FlagsUsed) > 0 {
// classic builder RUN currently does not support any flags, so fail on the first one
return errors.Errorf("the --%s option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled", c.FlagsUsed[0])
}
stateRunConfig := d.state.runConfig
cmdFromArgs, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, stateRunConfig, d.state.operatingSystem, c.Name(), c.String())
buildArgs := d.state.buildArgs.FilterAllowed(stateRunConfig.Env)
saveCmd := cmdFromArgs
if len(buildArgs) > 0 {
saveCmd = prependEnvOnCmd(d.state.buildArgs, buildArgs, cmdFromArgs)
}
runConfigForCacheProbe := copyRunConfig(stateRunConfig,
withCmd(saveCmd),
withArgsEscaped(argsEscaped),
withEntrypointOverride(saveCmd, nil))
if hit, err := d.builder.probeCache(d.state, runConfigForCacheProbe); err != nil || hit {
return err
}
runConfig := copyRunConfig(stateRunConfig,
withCmd(cmdFromArgs),
withArgsEscaped(argsEscaped),
withEnv(append(stateRunConfig.Env, buildArgs...)),
withEntrypointOverride(saveCmd, strslice.StrSlice{""}),
withoutHealthcheck())
cID, err := d.builder.create(runConfig)
if err != nil {
return err
}
if err := d.builder.containerManager.Run(d.builder.clientCtx, cID, d.builder.Stdout, d.builder.Stderr); err != nil {
if err, ok := err.(*statusCodeError); ok {
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
msg := fmt.Sprintf(
"The command '%s' returned a non-zero code: %d",
strings.Join(runConfig.Cmd, " "), err.StatusCode())
if err.Error() != "" {
msg = fmt.Sprintf("%s: %s", msg, err.Error())
}
return &jsonmessage.JSONError{
Message: msg,
Code: err.StatusCode(),
}
}
return err
}
// Don't persist the argsEscaped value in the committed image. Use the original
// from previous build steps (only CMD and ENTRYPOINT persist this).
if d.state.operatingSystem == "windows" {
runConfigForCacheProbe.ArgsEscaped = stateRunConfig.ArgsEscaped
}
return d.builder.commitContainer(d.state, cID, runConfigForCacheProbe)
}
// Derive the command to use for probeCache() and to commit in this container.
// Note that we only do this if there are any build-time env vars. Also, we
// use the special argument "|#" at the start of the args array. This will
// avoid conflicts with any RUN command since commands can not
// start with | (vertical bar). The "#" (number of build envs) is there to
// help ensure proper cache matches. We don't want a RUN command
// that starts with "foo=abc" to be considered part of a build-time env var.
//
// remove any unreferenced built-in args from the environment variables.
// These args are transparent so resulting image should be the same regardless
// of the value.
func prependEnvOnCmd(buildArgs *BuildArgs, buildArgVars []string, cmd strslice.StrSlice) strslice.StrSlice {
var tmpBuildEnv []string
for _, env := range buildArgVars {
key := strings.SplitN(env, "=", 2)[0]
if buildArgs.IsReferencedOrNotBuiltin(key) {
tmpBuildEnv = append(tmpBuildEnv, env)
}
}
sort.Strings(tmpBuildEnv)
tmpEnv := append([]string{fmt.Sprintf("|%d", len(tmpBuildEnv))}, tmpBuildEnv...)
return strslice.StrSlice(append(tmpEnv, cmd...))
}
// CMD foo
//
// Set the default command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchCmd(d dispatchRequest, c *instructions.CmdCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// We warn here as Windows shell processing operates differently to Linux.
// Linux: /bin/sh -c "echo hello" world --> hello
// Windows: cmd /s /c "echo hello" world --> hello world
if d.state.operatingSystem == "windows" &&
len(runConfig.Entrypoint) > 0 &&
d.state.runConfig.ArgsEscaped != argsEscaped {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form ENTRYPOINT and exec-form CMD may have unexpected results\n")
}
runConfig.Cmd = cmd
runConfig.ArgsEscaped = argsEscaped
if err := d.builder.commit(d.state, fmt.Sprintf("CMD %q", cmd)); err != nil {
return err
}
if len(c.ShellDependantCmdLine.CmdLine) != 0 {
d.state.cmdSet = true
}
return nil
}
// HEALTHCHECK foo
//
// Set the default healthcheck command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchHealthcheck(d dispatchRequest, c *instructions.HealthCheckCommand) error {
runConfig := d.state.runConfig
if runConfig.Healthcheck != nil {
oldCmd := runConfig.Healthcheck.Test
if len(oldCmd) > 0 && oldCmd[0] != "NONE" {
fmt.Fprintf(d.builder.Stdout, "Note: overriding previous HEALTHCHECK: %v\n", oldCmd)
}
}
runConfig.Healthcheck = c.Health
return d.builder.commit(d.state, fmt.Sprintf("HEALTHCHECK %q", runConfig.Healthcheck))
}
// ENTRYPOINT /usr/sbin/nginx
//
// Set the entrypoint to /usr/sbin/nginx. Will accept the CMD as the arguments
// to /usr/sbin/nginx. Uses the default shell if not in JSON format.
//
// Handles command processing similar to CMD and RUN, only req.runConfig.Entrypoint
// is initialized at newBuilder time instead of through argument parsing.
//
func dispatchEntrypoint(d dispatchRequest, c *instructions.EntrypointCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// This warning is a little more complex than in dispatchCmd(), as the Windows base images (similar
// universally to almost every Linux image out there) have a single .Cmd field populated so that
// `docker run --rm image` starts the default shell which would typically be sh on Linux,
// or cmd on Windows. The catch to this is that if a dockerfile had `CMD ["c:\\windows\\system32\\cmd.exe"]`,
// we wouldn't be able to tell the difference. However, that would be highly unlikely, and besides, this
// is only trying to give a helpful warning of possibly unexpected results.
if d.state.operatingSystem == "windows" &&
d.state.runConfig.ArgsEscaped != argsEscaped &&
((len(runConfig.Cmd) == 1 && strings.ToLower(runConfig.Cmd[0]) != `c:\windows\system32\cmd.exe` && len(runConfig.Shell) == 0) || (len(runConfig.Cmd) > 1)) {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form CMD and exec-form ENTRYPOINT may have unexpected results\n")
}
runConfig.Entrypoint = cmd
runConfig.ArgsEscaped = argsEscaped
if !d.state.cmdSet {
runConfig.Cmd = nil
}
return d.builder.commit(d.state, fmt.Sprintf("ENTRYPOINT %q", runConfig.Entrypoint))
}
// EXPOSE 6667/tcp 7000/tcp
//
// Expose ports for links and port mappings. This all ends up in
// req.runConfig.ExposedPorts for runconfig.
//
func dispatchExpose(d dispatchRequest, c *instructions.ExposeCommand, envs []string) error {
// custom multi word expansion
// expose $FOO with FOO="80 443" is expanded as EXPOSE [80,443]. This is the only command supporting word to words expansion
// so the word processing has been de-generalized
ports := []string{}
for _, p := range c.Ports {
ps, err := d.shlex.ProcessWords(p, envs)
if err != nil {
return err
}
ports = append(ports, ps...)
}
c.Ports = ports
ps, _, err := nat.ParsePortSpecs(ports)
if err != nil {
return err
}
if d.state.runConfig.ExposedPorts == nil {
d.state.runConfig.ExposedPorts = make(nat.PortSet)
}
for p := range ps {
d.state.runConfig.ExposedPorts[p] = struct{}{}
}
return d.builder.commit(d.state, "EXPOSE "+strings.Join(c.Ports, " "))
}
// USER foo
//
// Set the user to 'foo' for future commands and when running the
// ENTRYPOINT/CMD at container run time.
//
func dispatchUser(d dispatchRequest, c *instructions.UserCommand) error {
d.state.runConfig.User = c.User
return d.builder.commit(d.state, fmt.Sprintf("USER %v", c.User))
}
// VOLUME /foo
//
// Expose the volume /foo for use. Will also accept the JSON array form.
//
func dispatchVolume(d dispatchRequest, c *instructions.VolumeCommand) error {
if d.state.runConfig.Volumes == nil {
d.state.runConfig.Volumes = map[string]struct{}{}
}
for _, v := range c.Volumes {
if v == "" {
return errors.New("VOLUME specified can not be an empty string")
}
d.state.runConfig.Volumes[v] = struct{}{}
}
return d.builder.commit(d.state, fmt.Sprintf("VOLUME %v", c.Volumes))
}
// STOPSIGNAL signal
//
// Set the signal that will be used to kill the container.
func dispatchStopSignal(d dispatchRequest, c *instructions.StopSignalCommand) error {
_, err := signal.ParseSignal(c.Signal)
if err != nil {
return errdefs.InvalidParameter(err)
}
d.state.runConfig.StopSignal = c.Signal
return d.builder.commit(d.state, fmt.Sprintf("STOPSIGNAL %v", c.Signal))
}
// ARG name[=value]
//
// Adds the variable foo to the trusted list of variables that can be passed
// to builder using the --build-arg flag for expansion/substitution or passing to 'run'.
// Dockerfile author may optionally set a default value of this variable.
func dispatchArg(d dispatchRequest, c *instructions.ArgCommand) error {
var commitStr strings.Builder
commitStr.WriteString("ARG ")
for i, arg := range c.Args {
if i > 0 {
commitStr.WriteString(" ")
}
commitStr.WriteString(arg.Key)
if arg.Value != nil {
commitStr.WriteString("=")
commitStr.WriteString(*arg.Value)
}
d.state.buildArgs.AddArg(arg.Key, arg.Value)
}
return d.builder.commit(d.state, commitStr.String())
}
// SHELL powershell -command
//
// Set the non-default shell to use.
func dispatchShell(d dispatchRequest, c *instructions.ShellCommand) error {
d.state.runConfig.Shell = c.Shell
return d.builder.commit(d.state, fmt.Sprintf("SHELL %v", d.state.runConfig.Shell))
}
| thaJeztah | 08e67904c9f7f7e70d4c3bb688d05301f5fdf7e4 | 797b974cb90e32c7efe9e324d7459122c3f6b7b0 | bit weird to have a return in a for loop. Would be slightly better with an `if len(c.FlagsUsed) > 0 { return errors.Errorf(..., c.FlagsUsed[0]) }` | tiborvass | 5,037 |
moby/moby | 41,912 | builder: produce error when using unsupported Dockerfile option | fixes https://github.com/moby/moby/issues/41911
depends on
- [x] https://github.com/moby/moby/pull/42056 vendor: github.com/moby/buildkit v0.8.2
- [x] depends on https://github.com/moby/buildkit/pull/1954 / https://github.com/moby/buildkit/pull/1971
### builder: produce error when using unsupported Dockerfile option
With the promotion of the experimental Dockerfile syntax to "stable", the Dockerfile
syntax now includes some options that are supported by BuildKit, but not (yet)
supported in the classic builder.
As a result, parsing a Dockerfile may succeed, but any flag that's known to BuildKit,
but not supported by the classic builder is silently ignored;
$ mkdir buildkit_flags && cd buildkit_flags
$ touch foo.txt
For example, `RUN --mount`:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
---> Running in 022fdb856bc8
hello
Removing intermediate container 022fdb856bc8
---> e9f0988844d1
Successfully built e9f0988844d1
Or `COPY --chmod` (same for `ADD --chmod`):
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
---> 8b7117932a2a
Successfully built 8b7117932a2a
Note that unknown flags still produce and error, for example, the below fails because `--hello` is an unknown flag;
DOCKER_BUILDKIT=0 docker build -<<EOF
FROM busybox
RUN --hello echo hello
EOF
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 2: Unknown flag: hello
With this patch applied
----------------------------
With this patch applied, flags that are known in the Dockerfile spec, but are not
supported by the classic builder, produce an error, which includes a link to the
documentation how to enable BuildKit:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
the --mount option BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
```
Fix classic builder silently ignoring unsupported Dockerfile options
```
| null | 2021-01-21 12:30:09+00:00 | 2021-03-24 21:30:45+00:00 | builder/dockerfile/dispatchers.go | package dockerfile // import "github.com/docker/docker/builder/dockerfile"
// This file contains the dispatchers for each command. Note that
// `nullDispatch` is not actually a command, but support for commands we parse
// but do nothing with.
//
// See evaluator.go for a higher level discussion of the whole evaluator
// package.
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"github.com/containerd/containerd/platforms"
"github.com/docker/docker/api"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// ENV foo bar
//
// Sets the environment variable foo to bar, also makes interpolation
// in the dockerfile available from the next statement on via ${foo}.
//
func dispatchEnv(d dispatchRequest, c *instructions.EnvCommand) error {
runConfig := d.state.runConfig
commitMessage := bytes.NewBufferString("ENV")
for _, e := range c.Env {
name := e.Key
newVar := e.String()
commitMessage.WriteString(" " + newVar)
gotOne := false
for i, envVar := range runConfig.Env {
envParts := strings.SplitN(envVar, "=", 2)
compareFrom := envParts[0]
if shell.EqualEnvKeys(compareFrom, name) {
runConfig.Env[i] = newVar
gotOne = true
break
}
}
if !gotOne {
runConfig.Env = append(runConfig.Env, newVar)
}
}
return d.builder.commit(d.state, commitMessage.String())
}
// MAINTAINER some text <[email protected]>
//
// Sets the maintainer metadata.
func dispatchMaintainer(d dispatchRequest, c *instructions.MaintainerCommand) error {
d.state.maintainer = c.Maintainer
return d.builder.commit(d.state, "MAINTAINER "+c.Maintainer)
}
// LABEL some json data describing the image
//
// Sets the Label variable foo to bar,
//
func dispatchLabel(d dispatchRequest, c *instructions.LabelCommand) error {
if d.state.runConfig.Labels == nil {
d.state.runConfig.Labels = make(map[string]string)
}
commitStr := "LABEL"
for _, v := range c.Labels {
d.state.runConfig.Labels[v.Key] = v.Value
commitStr += " " + v.String()
}
return d.builder.commit(d.state, commitStr)
}
// ADD foo /path
//
// Add the file 'foo' to '/path'. Tarball and Remote URL (http, https) handling
// exist here. If you do not wish to have this automatic handling, use COPY.
//
func dispatchAdd(d dispatchRequest, c *instructions.AddCommand) error {
downloader := newRemoteSourceDownloader(d.builder.Output, d.builder.Stdout)
copier := copierFromDispatchRequest(d, downloader, nil)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "ADD")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
copyInstruction.allowLocalDecompression = true
return d.builder.performCopy(d, copyInstruction)
}
// COPY foo /path
//
// Same as 'ADD' but without the tar and remote url handling.
//
func dispatchCopy(d dispatchRequest, c *instructions.CopyCommand) error {
var im *imageMount
var err error
if c.From != "" {
im, err = d.getImageMount(c.From)
if err != nil {
return errors.Wrapf(err, "invalid from flag value %s", c.From)
}
}
copier := copierFromDispatchRequest(d, errOnSourceDownload, im)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "COPY")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
if c.From != "" && copyInstruction.chownStr == "" {
copyInstruction.preserveOwnership = true
}
return d.builder.performCopy(d, copyInstruction)
}
func (d *dispatchRequest) getImageMount(imageRefOrID string) (*imageMount, error) {
if imageRefOrID == "" {
// TODO: this could return the source in the default case as well?
return nil, nil
}
var localOnly bool
stage, err := d.stages.get(imageRefOrID)
if err != nil {
return nil, err
}
if stage != nil {
imageRefOrID = stage.Image
localOnly = true
}
return d.builder.imageSources.Get(imageRefOrID, localOnly, d.builder.platform)
}
// FROM [--platform=platform] imagename[:tag | @digest] [AS build-stage-name]
//
func initializeStage(d dispatchRequest, cmd *instructions.Stage) error {
d.builder.imageProber.Reset()
var platform *specs.Platform
if v := cmd.Platform; v != "" {
v, err := d.getExpandedString(d.shlex, v)
if err != nil {
return errors.Wrapf(err, "failed to process arguments for platform %s", v)
}
p, err := platforms.Parse(v)
if err != nil {
return errors.Wrapf(err, "failed to parse platform %s", v)
}
if err := system.ValidatePlatform(p); err != nil {
return err
}
platform = &p
}
image, err := d.getFromImage(d.shlex, cmd.BaseName, platform)
if err != nil {
return err
}
state := d.state
if err := state.beginStage(cmd.Name, image); err != nil {
return err
}
if len(state.runConfig.OnBuild) > 0 {
triggers := state.runConfig.OnBuild
state.runConfig.OnBuild = nil
return dispatchTriggeredOnBuild(d, triggers)
}
return nil
}
func dispatchTriggeredOnBuild(d dispatchRequest, triggers []string) error {
fmt.Fprintf(d.builder.Stdout, "# Executing %d build trigger", len(triggers))
if len(triggers) > 1 {
fmt.Fprint(d.builder.Stdout, "s")
}
fmt.Fprintln(d.builder.Stdout)
for _, trigger := range triggers {
d.state.updateRunConfig()
ast, err := parser.Parse(strings.NewReader(trigger))
if err != nil {
return err
}
if len(ast.AST.Children) != 1 {
return errors.New("onbuild trigger should be a single expression")
}
cmd, err := instructions.ParseCommand(ast.AST.Children[0])
if err != nil {
var uiErr *instructions.UnknownInstruction
if errors.As(err, &uiErr) {
buildsFailed.WithValues(metricsUnknownInstructionError).Inc()
}
return err
}
err = dispatch(d, cmd)
if err != nil {
return err
}
}
return nil
}
func (d *dispatchRequest) getExpandedString(shlex *shell.Lex, str string) (string, error) {
substitutionArgs := []string{}
for key, value := range d.state.buildArgs.GetAllMeta() {
substitutionArgs = append(substitutionArgs, key+"="+value)
}
name, err := shlex.ProcessWord(str, substitutionArgs)
if err != nil {
return "", err
}
return name, nil
}
func (d *dispatchRequest) getImageOrStage(name string, platform *specs.Platform) (builder.Image, error) {
var localOnly bool
if im, ok := d.stages.getByName(name); ok {
name = im.Image
localOnly = true
}
if platform == nil {
platform = d.builder.platform
}
// Windows cannot support a container with no base image unless it is LCOW.
if name == api.NoBaseImageSpecifier {
p := platforms.DefaultSpec()
if platform != nil {
p = *platform
}
imageImage := &image.Image{}
imageImage.OS = p.OS
// old windows scratch handling
// TODO: scratch should not have an os. It should be nil image.
// Windows supports scratch. What is not supported is running containers
// from it.
if runtime.GOOS == "windows" {
if platform == nil || platform.OS == "linux" {
if !system.LCOWSupported() {
return nil, errors.New("Linux containers are not supported on this system")
}
imageImage.OS = "linux"
} else if platform.OS == "windows" {
return nil, errors.New("Windows does not support FROM scratch")
} else {
return nil, errors.Errorf("platform %s is not supported", platforms.Format(p))
}
}
return builder.Image(imageImage), nil
}
imageMount, err := d.builder.imageSources.Get(name, localOnly, platform)
if err != nil {
return nil, err
}
return imageMount.Image(), nil
}
func (d *dispatchRequest) getFromImage(shlex *shell.Lex, basename string, platform *specs.Platform) (builder.Image, error) {
name, err := d.getExpandedString(shlex, basename)
if err != nil {
return nil, err
}
// Empty string is interpreted to FROM scratch by images.GetImageAndReleasableLayer,
// so validate expanded result is not empty.
if name == "" {
return nil, errors.Errorf("base name (%s) should not be blank", basename)
}
return d.getImageOrStage(name, platform)
}
func dispatchOnbuild(d dispatchRequest, c *instructions.OnbuildCommand) error {
d.state.runConfig.OnBuild = append(d.state.runConfig.OnBuild, c.Expression)
return d.builder.commit(d.state, "ONBUILD "+c.Expression)
}
// WORKDIR /tmp
//
// Set the working directory for future RUN/CMD/etc statements.
//
func dispatchWorkdir(d dispatchRequest, c *instructions.WorkdirCommand) error {
runConfig := d.state.runConfig
var err error
runConfig.WorkingDir, err = normalizeWorkdir(d.state.operatingSystem, runConfig.WorkingDir, c.Path)
if err != nil {
return err
}
// For performance reasons, we explicitly do a create/mkdir now
// This avoids having an unnecessary expensive mount/unmount calls
// (on Windows in particular) during each container create.
// Prior to 1.13, the mkdir was deferred and not executed at this step.
if d.builder.disableCommit {
// Don't call back into the daemon if we're going through docker commit --change "WORKDIR /foo".
// We've already updated the runConfig and that's enough.
return nil
}
comment := "WORKDIR " + runConfig.WorkingDir
runConfigWithCommentCmd := copyRunConfig(runConfig, withCmdCommentString(comment, d.state.operatingSystem))
containerID, err := d.builder.probeAndCreate(d.state, runConfigWithCommentCmd)
if err != nil || containerID == "" {
return err
}
if err := d.builder.docker.ContainerCreateWorkdir(containerID); err != nil {
return err
}
return d.builder.commitContainer(d.state, containerID, runConfigWithCommentCmd)
}
// RUN some command yo
//
// run a command and commit the image. Args are automatically prepended with
// the current SHELL which defaults to 'sh -c' under linux or 'cmd /S /C' under
// Windows, in the event there is only one argument The difference in processing:
//
// RUN echo hi # sh -c echo hi (Linux and LCOW)
// RUN echo hi # cmd /S /C echo hi (Windows)
// RUN [ "echo", "hi" ] # echo hi
//
func dispatchRun(d dispatchRequest, c *instructions.RunCommand) error {
if !system.IsOSSupported(d.state.operatingSystem) {
return system.ErrNotSupportedOperatingSystem
}
stateRunConfig := d.state.runConfig
cmdFromArgs, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, stateRunConfig, d.state.operatingSystem, c.Name(), c.String())
buildArgs := d.state.buildArgs.FilterAllowed(stateRunConfig.Env)
saveCmd := cmdFromArgs
if len(buildArgs) > 0 {
saveCmd = prependEnvOnCmd(d.state.buildArgs, buildArgs, cmdFromArgs)
}
runConfigForCacheProbe := copyRunConfig(stateRunConfig,
withCmd(saveCmd),
withArgsEscaped(argsEscaped),
withEntrypointOverride(saveCmd, nil))
if hit, err := d.builder.probeCache(d.state, runConfigForCacheProbe); err != nil || hit {
return err
}
runConfig := copyRunConfig(stateRunConfig,
withCmd(cmdFromArgs),
withArgsEscaped(argsEscaped),
withEnv(append(stateRunConfig.Env, buildArgs...)),
withEntrypointOverride(saveCmd, strslice.StrSlice{""}),
withoutHealthcheck())
cID, err := d.builder.create(runConfig)
if err != nil {
return err
}
if err := d.builder.containerManager.Run(d.builder.clientCtx, cID, d.builder.Stdout, d.builder.Stderr); err != nil {
if err, ok := err.(*statusCodeError); ok {
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
msg := fmt.Sprintf(
"The command '%s' returned a non-zero code: %d",
strings.Join(runConfig.Cmd, " "), err.StatusCode())
if err.Error() != "" {
msg = fmt.Sprintf("%s: %s", msg, err.Error())
}
return &jsonmessage.JSONError{
Message: msg,
Code: err.StatusCode(),
}
}
return err
}
// Don't persist the argsEscaped value in the committed image. Use the original
// from previous build steps (only CMD and ENTRYPOINT persist this).
if d.state.operatingSystem == "windows" {
runConfigForCacheProbe.ArgsEscaped = stateRunConfig.ArgsEscaped
}
return d.builder.commitContainer(d.state, cID, runConfigForCacheProbe)
}
// Derive the command to use for probeCache() and to commit in this container.
// Note that we only do this if there are any build-time env vars. Also, we
// use the special argument "|#" at the start of the args array. This will
// avoid conflicts with any RUN command since commands can not
// start with | (vertical bar). The "#" (number of build envs) is there to
// help ensure proper cache matches. We don't want a RUN command
// that starts with "foo=abc" to be considered part of a build-time env var.
//
// remove any unreferenced built-in args from the environment variables.
// These args are transparent so resulting image should be the same regardless
// of the value.
func prependEnvOnCmd(buildArgs *BuildArgs, buildArgVars []string, cmd strslice.StrSlice) strslice.StrSlice {
var tmpBuildEnv []string
for _, env := range buildArgVars {
key := strings.SplitN(env, "=", 2)[0]
if buildArgs.IsReferencedOrNotBuiltin(key) {
tmpBuildEnv = append(tmpBuildEnv, env)
}
}
sort.Strings(tmpBuildEnv)
tmpEnv := append([]string{fmt.Sprintf("|%d", len(tmpBuildEnv))}, tmpBuildEnv...)
return strslice.StrSlice(append(tmpEnv, cmd...))
}
// CMD foo
//
// Set the default command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchCmd(d dispatchRequest, c *instructions.CmdCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// We warn here as Windows shell processing operates differently to Linux.
// Linux: /bin/sh -c "echo hello" world --> hello
// Windows: cmd /s /c "echo hello" world --> hello world
if d.state.operatingSystem == "windows" &&
len(runConfig.Entrypoint) > 0 &&
d.state.runConfig.ArgsEscaped != argsEscaped {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form ENTRYPOINT and exec-form CMD may have unexpected results\n")
}
runConfig.Cmd = cmd
runConfig.ArgsEscaped = argsEscaped
if err := d.builder.commit(d.state, fmt.Sprintf("CMD %q", cmd)); err != nil {
return err
}
if len(c.ShellDependantCmdLine.CmdLine) != 0 {
d.state.cmdSet = true
}
return nil
}
// HEALTHCHECK foo
//
// Set the default healthcheck command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchHealthcheck(d dispatchRequest, c *instructions.HealthCheckCommand) error {
runConfig := d.state.runConfig
if runConfig.Healthcheck != nil {
oldCmd := runConfig.Healthcheck.Test
if len(oldCmd) > 0 && oldCmd[0] != "NONE" {
fmt.Fprintf(d.builder.Stdout, "Note: overriding previous HEALTHCHECK: %v\n", oldCmd)
}
}
runConfig.Healthcheck = c.Health
return d.builder.commit(d.state, fmt.Sprintf("HEALTHCHECK %q", runConfig.Healthcheck))
}
// ENTRYPOINT /usr/sbin/nginx
//
// Set the entrypoint to /usr/sbin/nginx. Will accept the CMD as the arguments
// to /usr/sbin/nginx. Uses the default shell if not in JSON format.
//
// Handles command processing similar to CMD and RUN, only req.runConfig.Entrypoint
// is initialized at newBuilder time instead of through argument parsing.
//
func dispatchEntrypoint(d dispatchRequest, c *instructions.EntrypointCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// This warning is a little more complex than in dispatchCmd(), as the Windows base images (similar
// universally to almost every Linux image out there) have a single .Cmd field populated so that
// `docker run --rm image` starts the default shell which would typically be sh on Linux,
// or cmd on Windows. The catch to this is that if a dockerfile had `CMD ["c:\\windows\\system32\\cmd.exe"]`,
// we wouldn't be able to tell the difference. However, that would be highly unlikely, and besides, this
// is only trying to give a helpful warning of possibly unexpected results.
if d.state.operatingSystem == "windows" &&
d.state.runConfig.ArgsEscaped != argsEscaped &&
((len(runConfig.Cmd) == 1 && strings.ToLower(runConfig.Cmd[0]) != `c:\windows\system32\cmd.exe` && len(runConfig.Shell) == 0) || (len(runConfig.Cmd) > 1)) {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form CMD and exec-form ENTRYPOINT may have unexpected results\n")
}
runConfig.Entrypoint = cmd
runConfig.ArgsEscaped = argsEscaped
if !d.state.cmdSet {
runConfig.Cmd = nil
}
return d.builder.commit(d.state, fmt.Sprintf("ENTRYPOINT %q", runConfig.Entrypoint))
}
// EXPOSE 6667/tcp 7000/tcp
//
// Expose ports for links and port mappings. This all ends up in
// req.runConfig.ExposedPorts for runconfig.
//
func dispatchExpose(d dispatchRequest, c *instructions.ExposeCommand, envs []string) error {
// custom multi word expansion
// expose $FOO with FOO="80 443" is expanded as EXPOSE [80,443]. This is the only command supporting word to words expansion
// so the word processing has been de-generalized
ports := []string{}
for _, p := range c.Ports {
ps, err := d.shlex.ProcessWords(p, envs)
if err != nil {
return err
}
ports = append(ports, ps...)
}
c.Ports = ports
ps, _, err := nat.ParsePortSpecs(ports)
if err != nil {
return err
}
if d.state.runConfig.ExposedPorts == nil {
d.state.runConfig.ExposedPorts = make(nat.PortSet)
}
for p := range ps {
d.state.runConfig.ExposedPorts[p] = struct{}{}
}
return d.builder.commit(d.state, "EXPOSE "+strings.Join(c.Ports, " "))
}
// USER foo
//
// Set the user to 'foo' for future commands and when running the
// ENTRYPOINT/CMD at container run time.
//
func dispatchUser(d dispatchRequest, c *instructions.UserCommand) error {
d.state.runConfig.User = c.User
return d.builder.commit(d.state, fmt.Sprintf("USER %v", c.User))
}
// VOLUME /foo
//
// Expose the volume /foo for use. Will also accept the JSON array form.
//
func dispatchVolume(d dispatchRequest, c *instructions.VolumeCommand) error {
if d.state.runConfig.Volumes == nil {
d.state.runConfig.Volumes = map[string]struct{}{}
}
for _, v := range c.Volumes {
if v == "" {
return errors.New("VOLUME specified can not be an empty string")
}
d.state.runConfig.Volumes[v] = struct{}{}
}
return d.builder.commit(d.state, fmt.Sprintf("VOLUME %v", c.Volumes))
}
// STOPSIGNAL signal
//
// Set the signal that will be used to kill the container.
func dispatchStopSignal(d dispatchRequest, c *instructions.StopSignalCommand) error {
_, err := signal.ParseSignal(c.Signal)
if err != nil {
return errdefs.InvalidParameter(err)
}
d.state.runConfig.StopSignal = c.Signal
return d.builder.commit(d.state, fmt.Sprintf("STOPSIGNAL %v", c.Signal))
}
// ARG name[=value]
//
// Adds the variable foo to the trusted list of variables that can be passed
// to builder using the --build-arg flag for expansion/substitution or passing to 'run'.
// Dockerfile author may optionally set a default value of this variable.
func dispatchArg(d dispatchRequest, c *instructions.ArgCommand) error {
var commitStr strings.Builder
commitStr.WriteString("ARG ")
for i, arg := range c.Args {
if i > 0 {
commitStr.WriteString(" ")
}
commitStr.WriteString(arg.Key)
if arg.Value != nil {
commitStr.WriteString("=")
commitStr.WriteString(*arg.Value)
}
d.state.buildArgs.AddArg(arg.Key, arg.Value)
}
return d.builder.commit(d.state, commitStr.String())
}
// SHELL powershell -command
//
// Set the non-default shell to use.
func dispatchShell(d dispatchRequest, c *instructions.ShellCommand) error {
d.state.runConfig.Shell = c.Shell
return d.builder.commit(d.state, fmt.Sprintf("SHELL %v", d.state.runConfig.Shell))
}
| package dockerfile // import "github.com/docker/docker/builder/dockerfile"
// This file contains the dispatchers for each command. Note that
// `nullDispatch` is not actually a command, but support for commands we parse
// but do nothing with.
//
// See evaluator.go for a higher level discussion of the whole evaluator
// package.
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"github.com/containerd/containerd/platforms"
"github.com/docker/docker/api"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// ENV foo bar
//
// Sets the environment variable foo to bar, also makes interpolation
// in the dockerfile available from the next statement on via ${foo}.
//
func dispatchEnv(d dispatchRequest, c *instructions.EnvCommand) error {
runConfig := d.state.runConfig
commitMessage := bytes.NewBufferString("ENV")
for _, e := range c.Env {
name := e.Key
newVar := e.String()
commitMessage.WriteString(" " + newVar)
gotOne := false
for i, envVar := range runConfig.Env {
envParts := strings.SplitN(envVar, "=", 2)
compareFrom := envParts[0]
if shell.EqualEnvKeys(compareFrom, name) {
runConfig.Env[i] = newVar
gotOne = true
break
}
}
if !gotOne {
runConfig.Env = append(runConfig.Env, newVar)
}
}
return d.builder.commit(d.state, commitMessage.String())
}
// MAINTAINER some text <[email protected]>
//
// Sets the maintainer metadata.
func dispatchMaintainer(d dispatchRequest, c *instructions.MaintainerCommand) error {
d.state.maintainer = c.Maintainer
return d.builder.commit(d.state, "MAINTAINER "+c.Maintainer)
}
// LABEL some json data describing the image
//
// Sets the Label variable foo to bar,
//
func dispatchLabel(d dispatchRequest, c *instructions.LabelCommand) error {
if d.state.runConfig.Labels == nil {
d.state.runConfig.Labels = make(map[string]string)
}
commitStr := "LABEL"
for _, v := range c.Labels {
d.state.runConfig.Labels[v.Key] = v.Value
commitStr += " " + v.String()
}
return d.builder.commit(d.state, commitStr)
}
// ADD foo /path
//
// Add the file 'foo' to '/path'. Tarball and Remote URL (http, https) handling
// exist here. If you do not wish to have this automatic handling, use COPY.
//
func dispatchAdd(d dispatchRequest, c *instructions.AddCommand) error {
if c.Chmod != "" {
return errors.New("the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
}
downloader := newRemoteSourceDownloader(d.builder.Output, d.builder.Stdout)
copier := copierFromDispatchRequest(d, downloader, nil)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "ADD")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
copyInstruction.allowLocalDecompression = true
return d.builder.performCopy(d, copyInstruction)
}
// COPY foo /path
//
// Same as 'ADD' but without the tar and remote url handling.
//
func dispatchCopy(d dispatchRequest, c *instructions.CopyCommand) error {
if c.Chmod != "" {
return errors.New("the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
}
var im *imageMount
var err error
if c.From != "" {
im, err = d.getImageMount(c.From)
if err != nil {
return errors.Wrapf(err, "invalid from flag value %s", c.From)
}
}
copier := copierFromDispatchRequest(d, errOnSourceDownload, im)
defer copier.Cleanup()
copyInstruction, err := copier.createCopyInstruction(c.SourcesAndDest, "COPY")
if err != nil {
return err
}
copyInstruction.chownStr = c.Chown
if c.From != "" && copyInstruction.chownStr == "" {
copyInstruction.preserveOwnership = true
}
return d.builder.performCopy(d, copyInstruction)
}
func (d *dispatchRequest) getImageMount(imageRefOrID string) (*imageMount, error) {
if imageRefOrID == "" {
// TODO: this could return the source in the default case as well?
return nil, nil
}
var localOnly bool
stage, err := d.stages.get(imageRefOrID)
if err != nil {
return nil, err
}
if stage != nil {
imageRefOrID = stage.Image
localOnly = true
}
return d.builder.imageSources.Get(imageRefOrID, localOnly, d.builder.platform)
}
// FROM [--platform=platform] imagename[:tag | @digest] [AS build-stage-name]
//
func initializeStage(d dispatchRequest, cmd *instructions.Stage) error {
d.builder.imageProber.Reset()
var platform *specs.Platform
if v := cmd.Platform; v != "" {
v, err := d.getExpandedString(d.shlex, v)
if err != nil {
return errors.Wrapf(err, "failed to process arguments for platform %s", v)
}
p, err := platforms.Parse(v)
if err != nil {
return errors.Wrapf(err, "failed to parse platform %s", v)
}
if err := system.ValidatePlatform(p); err != nil {
return err
}
platform = &p
}
image, err := d.getFromImage(d.shlex, cmd.BaseName, platform)
if err != nil {
return err
}
state := d.state
if err := state.beginStage(cmd.Name, image); err != nil {
return err
}
if len(state.runConfig.OnBuild) > 0 {
triggers := state.runConfig.OnBuild
state.runConfig.OnBuild = nil
return dispatchTriggeredOnBuild(d, triggers)
}
return nil
}
func dispatchTriggeredOnBuild(d dispatchRequest, triggers []string) error {
fmt.Fprintf(d.builder.Stdout, "# Executing %d build trigger", len(triggers))
if len(triggers) > 1 {
fmt.Fprint(d.builder.Stdout, "s")
}
fmt.Fprintln(d.builder.Stdout)
for _, trigger := range triggers {
d.state.updateRunConfig()
ast, err := parser.Parse(strings.NewReader(trigger))
if err != nil {
return err
}
if len(ast.AST.Children) != 1 {
return errors.New("onbuild trigger should be a single expression")
}
cmd, err := instructions.ParseCommand(ast.AST.Children[0])
if err != nil {
var uiErr *instructions.UnknownInstruction
if errors.As(err, &uiErr) {
buildsFailed.WithValues(metricsUnknownInstructionError).Inc()
}
return err
}
err = dispatch(d, cmd)
if err != nil {
return err
}
}
return nil
}
func (d *dispatchRequest) getExpandedString(shlex *shell.Lex, str string) (string, error) {
substitutionArgs := []string{}
for key, value := range d.state.buildArgs.GetAllMeta() {
substitutionArgs = append(substitutionArgs, key+"="+value)
}
name, err := shlex.ProcessWord(str, substitutionArgs)
if err != nil {
return "", err
}
return name, nil
}
func (d *dispatchRequest) getImageOrStage(name string, platform *specs.Platform) (builder.Image, error) {
var localOnly bool
if im, ok := d.stages.getByName(name); ok {
name = im.Image
localOnly = true
}
if platform == nil {
platform = d.builder.platform
}
// Windows cannot support a container with no base image unless it is LCOW.
if name == api.NoBaseImageSpecifier {
p := platforms.DefaultSpec()
if platform != nil {
p = *platform
}
imageImage := &image.Image{}
imageImage.OS = p.OS
// old windows scratch handling
// TODO: scratch should not have an os. It should be nil image.
// Windows supports scratch. What is not supported is running containers
// from it.
if runtime.GOOS == "windows" {
if platform == nil || platform.OS == "linux" {
if !system.LCOWSupported() {
return nil, errors.New("Linux containers are not supported on this system")
}
imageImage.OS = "linux"
} else if platform.OS == "windows" {
return nil, errors.New("Windows does not support FROM scratch")
} else {
return nil, errors.Errorf("platform %s is not supported", platforms.Format(p))
}
}
return builder.Image(imageImage), nil
}
imageMount, err := d.builder.imageSources.Get(name, localOnly, platform)
if err != nil {
return nil, err
}
return imageMount.Image(), nil
}
func (d *dispatchRequest) getFromImage(shlex *shell.Lex, basename string, platform *specs.Platform) (builder.Image, error) {
name, err := d.getExpandedString(shlex, basename)
if err != nil {
return nil, err
}
// Empty string is interpreted to FROM scratch by images.GetImageAndReleasableLayer,
// so validate expanded result is not empty.
if name == "" {
return nil, errors.Errorf("base name (%s) should not be blank", basename)
}
return d.getImageOrStage(name, platform)
}
func dispatchOnbuild(d dispatchRequest, c *instructions.OnbuildCommand) error {
d.state.runConfig.OnBuild = append(d.state.runConfig.OnBuild, c.Expression)
return d.builder.commit(d.state, "ONBUILD "+c.Expression)
}
// WORKDIR /tmp
//
// Set the working directory for future RUN/CMD/etc statements.
//
func dispatchWorkdir(d dispatchRequest, c *instructions.WorkdirCommand) error {
runConfig := d.state.runConfig
var err error
runConfig.WorkingDir, err = normalizeWorkdir(d.state.operatingSystem, runConfig.WorkingDir, c.Path)
if err != nil {
return err
}
// For performance reasons, we explicitly do a create/mkdir now
// This avoids having an unnecessary expensive mount/unmount calls
// (on Windows in particular) during each container create.
// Prior to 1.13, the mkdir was deferred and not executed at this step.
if d.builder.disableCommit {
// Don't call back into the daemon if we're going through docker commit --change "WORKDIR /foo".
// We've already updated the runConfig and that's enough.
return nil
}
comment := "WORKDIR " + runConfig.WorkingDir
runConfigWithCommentCmd := copyRunConfig(runConfig, withCmdCommentString(comment, d.state.operatingSystem))
containerID, err := d.builder.probeAndCreate(d.state, runConfigWithCommentCmd)
if err != nil || containerID == "" {
return err
}
if err := d.builder.docker.ContainerCreateWorkdir(containerID); err != nil {
return err
}
return d.builder.commitContainer(d.state, containerID, runConfigWithCommentCmd)
}
// RUN some command yo
//
// run a command and commit the image. Args are automatically prepended with
// the current SHELL which defaults to 'sh -c' under linux or 'cmd /S /C' under
// Windows, in the event there is only one argument The difference in processing:
//
// RUN echo hi # sh -c echo hi (Linux and LCOW)
// RUN echo hi # cmd /S /C echo hi (Windows)
// RUN [ "echo", "hi" ] # echo hi
//
func dispatchRun(d dispatchRequest, c *instructions.RunCommand) error {
if !system.IsOSSupported(d.state.operatingSystem) {
return system.ErrNotSupportedOperatingSystem
}
if len(c.FlagsUsed) > 0 {
// classic builder RUN currently does not support any flags, so fail on the first one
return errors.Errorf("the --%s option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled", c.FlagsUsed[0])
}
stateRunConfig := d.state.runConfig
cmdFromArgs, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, stateRunConfig, d.state.operatingSystem, c.Name(), c.String())
buildArgs := d.state.buildArgs.FilterAllowed(stateRunConfig.Env)
saveCmd := cmdFromArgs
if len(buildArgs) > 0 {
saveCmd = prependEnvOnCmd(d.state.buildArgs, buildArgs, cmdFromArgs)
}
runConfigForCacheProbe := copyRunConfig(stateRunConfig,
withCmd(saveCmd),
withArgsEscaped(argsEscaped),
withEntrypointOverride(saveCmd, nil))
if hit, err := d.builder.probeCache(d.state, runConfigForCacheProbe); err != nil || hit {
return err
}
runConfig := copyRunConfig(stateRunConfig,
withCmd(cmdFromArgs),
withArgsEscaped(argsEscaped),
withEnv(append(stateRunConfig.Env, buildArgs...)),
withEntrypointOverride(saveCmd, strslice.StrSlice{""}),
withoutHealthcheck())
cID, err := d.builder.create(runConfig)
if err != nil {
return err
}
if err := d.builder.containerManager.Run(d.builder.clientCtx, cID, d.builder.Stdout, d.builder.Stderr); err != nil {
if err, ok := err.(*statusCodeError); ok {
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
msg := fmt.Sprintf(
"The command '%s' returned a non-zero code: %d",
strings.Join(runConfig.Cmd, " "), err.StatusCode())
if err.Error() != "" {
msg = fmt.Sprintf("%s: %s", msg, err.Error())
}
return &jsonmessage.JSONError{
Message: msg,
Code: err.StatusCode(),
}
}
return err
}
// Don't persist the argsEscaped value in the committed image. Use the original
// from previous build steps (only CMD and ENTRYPOINT persist this).
if d.state.operatingSystem == "windows" {
runConfigForCacheProbe.ArgsEscaped = stateRunConfig.ArgsEscaped
}
return d.builder.commitContainer(d.state, cID, runConfigForCacheProbe)
}
// Derive the command to use for probeCache() and to commit in this container.
// Note that we only do this if there are any build-time env vars. Also, we
// use the special argument "|#" at the start of the args array. This will
// avoid conflicts with any RUN command since commands can not
// start with | (vertical bar). The "#" (number of build envs) is there to
// help ensure proper cache matches. We don't want a RUN command
// that starts with "foo=abc" to be considered part of a build-time env var.
//
// remove any unreferenced built-in args from the environment variables.
// These args are transparent so resulting image should be the same regardless
// of the value.
func prependEnvOnCmd(buildArgs *BuildArgs, buildArgVars []string, cmd strslice.StrSlice) strslice.StrSlice {
var tmpBuildEnv []string
for _, env := range buildArgVars {
key := strings.SplitN(env, "=", 2)[0]
if buildArgs.IsReferencedOrNotBuiltin(key) {
tmpBuildEnv = append(tmpBuildEnv, env)
}
}
sort.Strings(tmpBuildEnv)
tmpEnv := append([]string{fmt.Sprintf("|%d", len(tmpBuildEnv))}, tmpBuildEnv...)
return strslice.StrSlice(append(tmpEnv, cmd...))
}
// CMD foo
//
// Set the default command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchCmd(d dispatchRequest, c *instructions.CmdCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// We warn here as Windows shell processing operates differently to Linux.
// Linux: /bin/sh -c "echo hello" world --> hello
// Windows: cmd /s /c "echo hello" world --> hello world
if d.state.operatingSystem == "windows" &&
len(runConfig.Entrypoint) > 0 &&
d.state.runConfig.ArgsEscaped != argsEscaped {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form ENTRYPOINT and exec-form CMD may have unexpected results\n")
}
runConfig.Cmd = cmd
runConfig.ArgsEscaped = argsEscaped
if err := d.builder.commit(d.state, fmt.Sprintf("CMD %q", cmd)); err != nil {
return err
}
if len(c.ShellDependantCmdLine.CmdLine) != 0 {
d.state.cmdSet = true
}
return nil
}
// HEALTHCHECK foo
//
// Set the default healthcheck command to run in the container (which may be empty).
// Argument handling is the same as RUN.
//
func dispatchHealthcheck(d dispatchRequest, c *instructions.HealthCheckCommand) error {
runConfig := d.state.runConfig
if runConfig.Healthcheck != nil {
oldCmd := runConfig.Healthcheck.Test
if len(oldCmd) > 0 && oldCmd[0] != "NONE" {
fmt.Fprintf(d.builder.Stdout, "Note: overriding previous HEALTHCHECK: %v\n", oldCmd)
}
}
runConfig.Healthcheck = c.Health
return d.builder.commit(d.state, fmt.Sprintf("HEALTHCHECK %q", runConfig.Healthcheck))
}
// ENTRYPOINT /usr/sbin/nginx
//
// Set the entrypoint to /usr/sbin/nginx. Will accept the CMD as the arguments
// to /usr/sbin/nginx. Uses the default shell if not in JSON format.
//
// Handles command processing similar to CMD and RUN, only req.runConfig.Entrypoint
// is initialized at newBuilder time instead of through argument parsing.
//
func dispatchEntrypoint(d dispatchRequest, c *instructions.EntrypointCommand) error {
runConfig := d.state.runConfig
cmd, argsEscaped := resolveCmdLine(c.ShellDependantCmdLine, runConfig, d.state.operatingSystem, c.Name(), c.String())
// This warning is a little more complex than in dispatchCmd(), as the Windows base images (similar
// universally to almost every Linux image out there) have a single .Cmd field populated so that
// `docker run --rm image` starts the default shell which would typically be sh on Linux,
// or cmd on Windows. The catch to this is that if a dockerfile had `CMD ["c:\\windows\\system32\\cmd.exe"]`,
// we wouldn't be able to tell the difference. However, that would be highly unlikely, and besides, this
// is only trying to give a helpful warning of possibly unexpected results.
if d.state.operatingSystem == "windows" &&
d.state.runConfig.ArgsEscaped != argsEscaped &&
((len(runConfig.Cmd) == 1 && strings.ToLower(runConfig.Cmd[0]) != `c:\windows\system32\cmd.exe` && len(runConfig.Shell) == 0) || (len(runConfig.Cmd) > 1)) {
fmt.Fprintf(d.builder.Stderr, " ---> [Warning] Shell-form CMD and exec-form ENTRYPOINT may have unexpected results\n")
}
runConfig.Entrypoint = cmd
runConfig.ArgsEscaped = argsEscaped
if !d.state.cmdSet {
runConfig.Cmd = nil
}
return d.builder.commit(d.state, fmt.Sprintf("ENTRYPOINT %q", runConfig.Entrypoint))
}
// EXPOSE 6667/tcp 7000/tcp
//
// Expose ports for links and port mappings. This all ends up in
// req.runConfig.ExposedPorts for runconfig.
//
func dispatchExpose(d dispatchRequest, c *instructions.ExposeCommand, envs []string) error {
// custom multi word expansion
// expose $FOO with FOO="80 443" is expanded as EXPOSE [80,443]. This is the only command supporting word to words expansion
// so the word processing has been de-generalized
ports := []string{}
for _, p := range c.Ports {
ps, err := d.shlex.ProcessWords(p, envs)
if err != nil {
return err
}
ports = append(ports, ps...)
}
c.Ports = ports
ps, _, err := nat.ParsePortSpecs(ports)
if err != nil {
return err
}
if d.state.runConfig.ExposedPorts == nil {
d.state.runConfig.ExposedPorts = make(nat.PortSet)
}
for p := range ps {
d.state.runConfig.ExposedPorts[p] = struct{}{}
}
return d.builder.commit(d.state, "EXPOSE "+strings.Join(c.Ports, " "))
}
// USER foo
//
// Set the user to 'foo' for future commands and when running the
// ENTRYPOINT/CMD at container run time.
//
func dispatchUser(d dispatchRequest, c *instructions.UserCommand) error {
d.state.runConfig.User = c.User
return d.builder.commit(d.state, fmt.Sprintf("USER %v", c.User))
}
// VOLUME /foo
//
// Expose the volume /foo for use. Will also accept the JSON array form.
//
func dispatchVolume(d dispatchRequest, c *instructions.VolumeCommand) error {
if d.state.runConfig.Volumes == nil {
d.state.runConfig.Volumes = map[string]struct{}{}
}
for _, v := range c.Volumes {
if v == "" {
return errors.New("VOLUME specified can not be an empty string")
}
d.state.runConfig.Volumes[v] = struct{}{}
}
return d.builder.commit(d.state, fmt.Sprintf("VOLUME %v", c.Volumes))
}
// STOPSIGNAL signal
//
// Set the signal that will be used to kill the container.
func dispatchStopSignal(d dispatchRequest, c *instructions.StopSignalCommand) error {
_, err := signal.ParseSignal(c.Signal)
if err != nil {
return errdefs.InvalidParameter(err)
}
d.state.runConfig.StopSignal = c.Signal
return d.builder.commit(d.state, fmt.Sprintf("STOPSIGNAL %v", c.Signal))
}
// ARG name[=value]
//
// Adds the variable foo to the trusted list of variables that can be passed
// to builder using the --build-arg flag for expansion/substitution or passing to 'run'.
// Dockerfile author may optionally set a default value of this variable.
func dispatchArg(d dispatchRequest, c *instructions.ArgCommand) error {
var commitStr strings.Builder
commitStr.WriteString("ARG ")
for i, arg := range c.Args {
if i > 0 {
commitStr.WriteString(" ")
}
commitStr.WriteString(arg.Key)
if arg.Value != nil {
commitStr.WriteString("=")
commitStr.WriteString(*arg.Value)
}
d.state.buildArgs.AddArg(arg.Key, arg.Value)
}
return d.builder.commit(d.state, commitStr.String())
}
// SHELL powershell -command
//
// Set the non-default shell to use.
func dispatchShell(d dispatchRequest, c *instructions.ShellCommand) error {
d.state.runConfig.Shell = c.Shell
return d.builder.commit(d.state, fmt.Sprintf("SHELL %v", d.state.runConfig.Shell))
}
| thaJeztah | 08e67904c9f7f7e70d4c3bb688d05301f5fdf7e4 | 797b974cb90e32c7efe9e324d7459122c3f6b7b0 | Ah, yes, I think I started with creating an error-message for all flags or to have a "whitelist", but then decided "meh, just return an error for the first one"; I'll update | thaJeztah | 5,038 |
moby/moby | 41,912 | builder: produce error when using unsupported Dockerfile option | fixes https://github.com/moby/moby/issues/41911
depends on
- [x] https://github.com/moby/moby/pull/42056 vendor: github.com/moby/buildkit v0.8.2
- [x] depends on https://github.com/moby/buildkit/pull/1954 / https://github.com/moby/buildkit/pull/1971
### builder: produce error when using unsupported Dockerfile option
With the promotion of the experimental Dockerfile syntax to "stable", the Dockerfile
syntax now includes some options that are supported by BuildKit, but not (yet)
supported in the classic builder.
As a result, parsing a Dockerfile may succeed, but any flag that's known to BuildKit,
but not supported by the classic builder is silently ignored;
$ mkdir buildkit_flags && cd buildkit_flags
$ touch foo.txt
For example, `RUN --mount`:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
---> Running in 022fdb856bc8
hello
Removing intermediate container 022fdb856bc8
---> e9f0988844d1
Successfully built e9f0988844d1
Or `COPY --chmod` (same for `ADD --chmod`):
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
---> 8b7117932a2a
Successfully built 8b7117932a2a
Note that unknown flags still produce and error, for example, the below fails because `--hello` is an unknown flag;
DOCKER_BUILDKIT=0 docker build -<<EOF
FROM busybox
RUN --hello echo hello
EOF
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 2: Unknown flag: hello
With this patch applied
----------------------------
With this patch applied, flags that are known in the Dockerfile spec, but are not
supported by the classic builder, produce an error, which includes a link to the
documentation how to enable BuildKit:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
the --mount option BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
```
Fix classic builder silently ignoring unsupported Dockerfile options
```
| null | 2021-01-21 12:30:09+00:00 | 2021-03-24 21:30:45+00:00 | builder/dockerfile/dispatchers_test.go | package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"bytes"
"context"
"runtime"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func newBuilderWithMockBackend() *Builder {
mockBackend := &MockBackend{}
opts := &types.ImageBuildOptions{}
ctx := context.Background()
b := &Builder{
options: opts,
docker: mockBackend,
Stdout: new(bytes.Buffer),
clientCtx: ctx,
disableCommit: true,
imageSources: newImageSources(ctx, builderOptions{
Options: opts,
Backend: mockBackend,
}),
imageProber: newImageProber(mockBackend, nil, false),
containerManager: newContainerManager(mockBackend),
}
return b
}
func TestEnv2Variables(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
instructions.KeyValuePair{Key: "var2", Value: "val2"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=val2",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestEnvValueWithExistingRunConfigEnv(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.runConfig.Env = []string{"var1=old", "var2=fromenv"}
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=fromenv",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestMaintainer(t *testing.T) {
maintainerEntry := "Some Maintainer <[email protected]>"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.MaintainerCommand{Maintainer: maintainerEntry}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(maintainerEntry, sb.state.maintainer))
}
func TestLabel(t *testing.T) {
labelName := "label"
labelValue := "value"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.LabelCommand{
Labels: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: labelName, Value: labelValue},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, is.Contains(sb.state.runConfig.Labels, labelName))
assert.Check(t, is.Equal(sb.state.runConfig.Labels[labelName], labelValue))
}
func TestFromScratch(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.Stage{
BaseName: "scratch",
}
err := initializeStage(sb, cmd)
if runtime.GOOS == "windows" && !system.LCOWSupported() {
assert.Check(t, is.Error(err, "Linux containers are not supported on this system"))
return
}
assert.NilError(t, err)
assert.Check(t, sb.state.hasFromImage())
assert.Check(t, is.Equal("", sb.state.imageID))
expected := "PATH=" + system.DefaultPathEnv(runtime.GOOS)
assert.Check(t, is.DeepEqual([]string{expected}, sb.state.runConfig.Env))
}
func TestFromWithArg(t *testing.T) {
tag, expected := ":sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine"+tag, name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
args := NewBuildArgs(make(map[string]*string))
val := "sometag"
metaArg := instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{
Key: "THETAG",
Value: &val,
}}}
cmd := &instructions.Stage{
BaseName: "alpine:${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
assert.Check(t, is.Equal(expected, sb.state.baseImage.ImageID()))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllAllowed(), 0))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllMeta(), 1))
}
func TestFromWithArgButBuildArgsNotGiven(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
metaArg := instructions.ArgCommand{}
cmd := &instructions.Stage{
BaseName: "${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.Error(t, err, "base name (${THETAG}) should not be blank")
}
func TestFromWithUndefinedArg(t *testing.T) {
tag, expected := "sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine", name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
b.options.BuildArgs = map[string]*string{"THETAG": &tag}
cmd := &instructions.Stage{
BaseName: "alpine${THETAG}",
}
err := initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
}
func TestFromMultiStageWithNamedStage(t *testing.T) {
b := newBuilderWithMockBackend()
firstFrom := &instructions.Stage{BaseName: "someimg", Name: "base"}
secondFrom := &instructions.Stage{BaseName: "base"}
previousResults := newStagesBuildResults()
firstSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
secondSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
err := initializeStage(firstSB, firstFrom)
assert.NilError(t, err)
assert.Check(t, firstSB.state.hasFromImage())
previousResults.indexed["base"] = firstSB.state.runConfig
previousResults.flat = append(previousResults.flat, firstSB.state.runConfig)
err = initializeStage(secondSB, secondFrom)
assert.NilError(t, err)
assert.Check(t, secondSB.state.hasFromImage())
}
func TestOnbuild(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.OnbuildCommand{
Expression: "ADD . /app/src",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("ADD . /app/src", sb.state.runConfig.OnBuild[0]))
}
func TestWorkdir(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
workingDir := "/app"
if runtime.GOOS == "windows" {
workingDir = "C:\\app"
}
cmd := &instructions.WorkdirCommand{
Path: workingDir,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(workingDir, sb.state.runConfig.WorkingDir))
}
func TestCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
command := "./executable"
cmd := &instructions.CmdCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{command},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
var expectedCommand strslice.StrSlice
if runtime.GOOS == "windows" {
expectedCommand = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", command))
} else {
expectedCommand = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", command))
}
assert.Check(t, is.DeepEqual(expectedCommand, sb.state.runConfig.Cmd))
assert.Check(t, sb.state.cmdSet)
}
func TestHealthcheckNone(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: []string{"NONE"},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual([]string{"NONE"}, sb.state.runConfig.Healthcheck.Test))
}
func TestHealthcheckCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestEntrypoint(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
entrypointCmd := "/usr/sbin/nginx"
cmd := &instructions.EntrypointCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{entrypointCmd},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Entrypoint != nil)
var expectedEntrypoint strslice.StrSlice
if runtime.GOOS == "windows" {
expectedEntrypoint = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", entrypointCmd))
} else {
expectedEntrypoint = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", entrypointCmd))
}
assert.Check(t, is.DeepEqual(expectedEntrypoint, sb.state.runConfig.Entrypoint))
}
func TestExpose(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedPort := "80"
cmd := &instructions.ExposeCommand{
Ports: []string{exposedPort},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.ExposedPorts != nil)
assert.Assert(t, is.Len(sb.state.runConfig.ExposedPorts, 1))
portsMapping, err := nat.ParsePortSpec(exposedPort)
assert.NilError(t, err)
assert.Check(t, is.Contains(sb.state.runConfig.ExposedPorts, portsMapping[0].Port))
}
func TestUser(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.UserCommand{
User: "test",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("test", sb.state.runConfig.User))
}
func TestVolume(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedVolume := "/foo"
cmd := &instructions.VolumeCommand{
Volumes: []string{exposedVolume},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Volumes != nil)
assert.Check(t, is.Len(sb.state.runConfig.Volumes, 1))
assert.Check(t, is.Contains(sb.state.runConfig.Volumes, exposedVolume))
}
func TestStopSignal(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Windows does not support stopsignal")
return
}
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
signal := "SIGKILL"
cmd := &instructions.StopSignalCommand{
Signal: signal,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(signal, sb.state.runConfig.StopSignal))
}
func TestArg(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
argName := "foo"
argVal := "bar"
cmd := &instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{Key: argName, Value: &argVal}}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expected := map[string]string{argName: argVal}
assert.Check(t, is.DeepEqual(expected, sb.state.buildArgs.GetAllAllowed()))
}
func TestShell(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
shellCmd := "powershell"
cmd := &instructions.ShellCommand{Shell: strslice.StrSlice{shellCmd}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expectedShell := strslice.StrSlice([]string{shellCmd})
assert.Check(t, is.DeepEqual(expectedShell, sb.state.runConfig.Shell))
}
func TestPrependEnvOnCmd(t *testing.T) {
buildArgs := NewBuildArgs(nil)
buildArgs.AddArg("NO_PROXY", nil)
args := []string{"sorted=nope", "args=not", "http_proxy=foo", "NO_PROXY=YA"}
cmd := []string{"foo", "bar"}
cmdWithEnv := prependEnvOnCmd(buildArgs, args, cmd)
expected := strslice.StrSlice([]string{
"|3", "NO_PROXY=YA", "args=not", "sorted=nope", "foo", "bar"})
assert.Check(t, is.DeepEqual(expected, cmdWithEnv))
}
func TestRunWithBuildArgs(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
args.argsFromOptions["HTTP_PROXY"] = strPtr("FOO")
b.disableCommit = false
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
runConfig := &container.Config{}
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
var cmdWithShell strslice.StrSlice
if runtime.GOOS == "windows" {
cmdWithShell = strslice.StrSlice([]string{strings.Join(append(getShell(runConfig, runtime.GOOS), []string{"echo foo"}...), " ")})
} else {
cmdWithShell = strslice.StrSlice(append(getShell(runConfig, runtime.GOOS), "echo foo"))
}
envVars := []string{"|1", "one=two"}
cachedCmd := strslice.StrSlice(append(envVars, cmdWithShell...))
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
// Check the runConfig.Cmd sent to probeCache()
assert.Check(t, is.DeepEqual(cachedCmd, cfg.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Entrypoint))
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the runConfig.Cmd sent to create()
assert.Check(t, is.DeepEqual(cmdWithShell, config.Config.Cmd))
assert.Check(t, is.Contains(config.Config.Env, "one=two"))
assert.Check(t, is.DeepEqual(strslice.StrSlice{""}, config.Config.Entrypoint))
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
// Check the runConfig.Cmd sent to commit()
assert.Check(t, is.DeepEqual(origCmd, cfg.Config.Cmd))
assert.Check(t, is.DeepEqual(cachedCmd, cfg.ContainerConfig.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Config.Entrypoint))
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
sb.state.buildArgs.AddArg("one", strPtr("two"))
// This is hugely annoying. On the Windows side, it relies on the
// RunCommand being able to emit String() and Name() (as implemented by
// withNameAndCode). Unfortunately, that is internal, and no way to directly
// set. However, we can fortunately use ParseInstruction in the instructions
// package to parse a fake node which can be used as our instructions.RunCommand
// instead.
node := &parser.Node{
Original: `RUN echo foo`,
Value: "run",
}
runint, err := instructions.ParseInstruction(node)
assert.NilError(t, err)
runinst := runint.(*instructions.RunCommand)
runinst.CmdLine = strslice.StrSlice{"echo foo"}
runinst.PrependShell = true
assert.NilError(t, dispatch(sb, runinst))
// Check that runConfig.Cmd has not been modified by run
assert.Check(t, is.DeepEqual(origCmd, sb.state.runConfig.Cmd))
}
func TestRunIgnoresHealthcheck(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
b.disableCommit = false
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
assert.NilError(t, dispatch(sb, cmd))
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the Healthcheck is disabled.
assert.Check(t, is.DeepEqual([]string{"NONE"}, config.Config.Healthcheck.Test))
return container.ContainerCreateCreatedBody{ID: "123456"}, nil
}
sb.state.buildArgs.AddArg("one", strPtr("two"))
run := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
assert.NilError(t, dispatch(sb, run))
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
| package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"bytes"
"context"
"fmt"
"runtime"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func newBuilderWithMockBackend() *Builder {
mockBackend := &MockBackend{}
opts := &types.ImageBuildOptions{}
ctx := context.Background()
b := &Builder{
options: opts,
docker: mockBackend,
Stdout: new(bytes.Buffer),
clientCtx: ctx,
disableCommit: true,
imageSources: newImageSources(ctx, builderOptions{
Options: opts,
Backend: mockBackend,
}),
imageProber: newImageProber(mockBackend, nil, false),
containerManager: newContainerManager(mockBackend),
}
return b
}
func TestEnv2Variables(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
instructions.KeyValuePair{Key: "var2", Value: "val2"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=val2",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestEnvValueWithExistingRunConfigEnv(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.runConfig.Env = []string{"var1=old", "var2=fromenv"}
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=fromenv",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestMaintainer(t *testing.T) {
maintainerEntry := "Some Maintainer <[email protected]>"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.MaintainerCommand{Maintainer: maintainerEntry}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(maintainerEntry, sb.state.maintainer))
}
func TestLabel(t *testing.T) {
labelName := "label"
labelValue := "value"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.LabelCommand{
Labels: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: labelName, Value: labelValue},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, is.Contains(sb.state.runConfig.Labels, labelName))
assert.Check(t, is.Equal(sb.state.runConfig.Labels[labelName], labelValue))
}
func TestFromScratch(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.Stage{
BaseName: "scratch",
}
err := initializeStage(sb, cmd)
if runtime.GOOS == "windows" && !system.LCOWSupported() {
assert.Check(t, is.Error(err, "Linux containers are not supported on this system"))
return
}
assert.NilError(t, err)
assert.Check(t, sb.state.hasFromImage())
assert.Check(t, is.Equal("", sb.state.imageID))
expected := "PATH=" + system.DefaultPathEnv(runtime.GOOS)
assert.Check(t, is.DeepEqual([]string{expected}, sb.state.runConfig.Env))
}
func TestFromWithArg(t *testing.T) {
tag, expected := ":sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine"+tag, name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
args := NewBuildArgs(make(map[string]*string))
val := "sometag"
metaArg := instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{
Key: "THETAG",
Value: &val,
}}}
cmd := &instructions.Stage{
BaseName: "alpine:${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
assert.Check(t, is.Equal(expected, sb.state.baseImage.ImageID()))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllAllowed(), 0))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllMeta(), 1))
}
func TestFromWithArgButBuildArgsNotGiven(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
metaArg := instructions.ArgCommand{}
cmd := &instructions.Stage{
BaseName: "${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.Error(t, err, "base name (${THETAG}) should not be blank")
}
func TestFromWithUndefinedArg(t *testing.T) {
tag, expected := "sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine", name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
b.options.BuildArgs = map[string]*string{"THETAG": &tag}
cmd := &instructions.Stage{
BaseName: "alpine${THETAG}",
}
err := initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
}
func TestFromMultiStageWithNamedStage(t *testing.T) {
b := newBuilderWithMockBackend()
firstFrom := &instructions.Stage{BaseName: "someimg", Name: "base"}
secondFrom := &instructions.Stage{BaseName: "base"}
previousResults := newStagesBuildResults()
firstSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
secondSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
err := initializeStage(firstSB, firstFrom)
assert.NilError(t, err)
assert.Check(t, firstSB.state.hasFromImage())
previousResults.indexed["base"] = firstSB.state.runConfig
previousResults.flat = append(previousResults.flat, firstSB.state.runConfig)
err = initializeStage(secondSB, secondFrom)
assert.NilError(t, err)
assert.Check(t, secondSB.state.hasFromImage())
}
func TestOnbuild(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.OnbuildCommand{
Expression: "ADD . /app/src",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("ADD . /app/src", sb.state.runConfig.OnBuild[0]))
}
func TestWorkdir(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
workingDir := "/app"
if runtime.GOOS == "windows" {
workingDir = "C:\\app"
}
cmd := &instructions.WorkdirCommand{
Path: workingDir,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(workingDir, sb.state.runConfig.WorkingDir))
}
func TestCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
command := "./executable"
cmd := &instructions.CmdCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{command},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
var expectedCommand strslice.StrSlice
if runtime.GOOS == "windows" {
expectedCommand = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", command))
} else {
expectedCommand = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", command))
}
assert.Check(t, is.DeepEqual(expectedCommand, sb.state.runConfig.Cmd))
assert.Check(t, sb.state.cmdSet)
}
func TestHealthcheckNone(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: []string{"NONE"},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual([]string{"NONE"}, sb.state.runConfig.Healthcheck.Test))
}
func TestHealthcheckCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestEntrypoint(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
entrypointCmd := "/usr/sbin/nginx"
cmd := &instructions.EntrypointCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{entrypointCmd},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Entrypoint != nil)
var expectedEntrypoint strslice.StrSlice
if runtime.GOOS == "windows" {
expectedEntrypoint = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", entrypointCmd))
} else {
expectedEntrypoint = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", entrypointCmd))
}
assert.Check(t, is.DeepEqual(expectedEntrypoint, sb.state.runConfig.Entrypoint))
}
func TestExpose(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedPort := "80"
cmd := &instructions.ExposeCommand{
Ports: []string{exposedPort},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.ExposedPorts != nil)
assert.Assert(t, is.Len(sb.state.runConfig.ExposedPorts, 1))
portsMapping, err := nat.ParsePortSpec(exposedPort)
assert.NilError(t, err)
assert.Check(t, is.Contains(sb.state.runConfig.ExposedPorts, portsMapping[0].Port))
}
func TestUser(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.UserCommand{
User: "test",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("test", sb.state.runConfig.User))
}
func TestVolume(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedVolume := "/foo"
cmd := &instructions.VolumeCommand{
Volumes: []string{exposedVolume},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Volumes != nil)
assert.Check(t, is.Len(sb.state.runConfig.Volumes, 1))
assert.Check(t, is.Contains(sb.state.runConfig.Volumes, exposedVolume))
}
func TestStopSignal(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Windows does not support stopsignal")
return
}
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
signal := "SIGKILL"
cmd := &instructions.StopSignalCommand{
Signal: signal,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(signal, sb.state.runConfig.StopSignal))
}
func TestArg(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
argName := "foo"
argVal := "bar"
cmd := &instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{Key: argName, Value: &argVal}}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expected := map[string]string{argName: argVal}
assert.Check(t, is.DeepEqual(expected, sb.state.buildArgs.GetAllAllowed()))
}
func TestShell(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
shellCmd := "powershell"
cmd := &instructions.ShellCommand{Shell: strslice.StrSlice{shellCmd}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expectedShell := strslice.StrSlice([]string{shellCmd})
assert.Check(t, is.DeepEqual(expectedShell, sb.state.runConfig.Shell))
}
func TestPrependEnvOnCmd(t *testing.T) {
buildArgs := NewBuildArgs(nil)
buildArgs.AddArg("NO_PROXY", nil)
args := []string{"sorted=nope", "args=not", "http_proxy=foo", "NO_PROXY=YA"}
cmd := []string{"foo", "bar"}
cmdWithEnv := prependEnvOnCmd(buildArgs, args, cmd)
expected := strslice.StrSlice([]string{
"|3", "NO_PROXY=YA", "args=not", "sorted=nope", "foo", "bar"})
assert.Check(t, is.DeepEqual(expected, cmdWithEnv))
}
func TestRunWithBuildArgs(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
args.argsFromOptions["HTTP_PROXY"] = strPtr("FOO")
b.disableCommit = false
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
runConfig := &container.Config{}
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
var cmdWithShell strslice.StrSlice
if runtime.GOOS == "windows" {
cmdWithShell = strslice.StrSlice([]string{strings.Join(append(getShell(runConfig, runtime.GOOS), []string{"echo foo"}...), " ")})
} else {
cmdWithShell = strslice.StrSlice(append(getShell(runConfig, runtime.GOOS), "echo foo"))
}
envVars := []string{"|1", "one=two"}
cachedCmd := strslice.StrSlice(append(envVars, cmdWithShell...))
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
// Check the runConfig.Cmd sent to probeCache()
assert.Check(t, is.DeepEqual(cachedCmd, cfg.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Entrypoint))
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the runConfig.Cmd sent to create()
assert.Check(t, is.DeepEqual(cmdWithShell, config.Config.Cmd))
assert.Check(t, is.Contains(config.Config.Env, "one=two"))
assert.Check(t, is.DeepEqual(strslice.StrSlice{""}, config.Config.Entrypoint))
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
// Check the runConfig.Cmd sent to commit()
assert.Check(t, is.DeepEqual(origCmd, cfg.Config.Cmd))
assert.Check(t, is.DeepEqual(cachedCmd, cfg.ContainerConfig.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Config.Entrypoint))
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
sb.state.buildArgs.AddArg("one", strPtr("two"))
// This is hugely annoying. On the Windows side, it relies on the
// RunCommand being able to emit String() and Name() (as implemented by
// withNameAndCode). Unfortunately, that is internal, and no way to directly
// set. However, we can fortunately use ParseInstruction in the instructions
// package to parse a fake node which can be used as our instructions.RunCommand
// instead.
node := &parser.Node{
Original: `RUN echo foo`,
Value: "run",
}
runint, err := instructions.ParseInstruction(node)
assert.NilError(t, err)
runinst := runint.(*instructions.RunCommand)
runinst.CmdLine = strslice.StrSlice{"echo foo"}
runinst.PrependShell = true
assert.NilError(t, dispatch(sb, runinst))
// Check that runConfig.Cmd has not been modified by run
assert.Check(t, is.DeepEqual(origCmd, sb.state.runConfig.Cmd))
}
func TestRunIgnoresHealthcheck(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
b.disableCommit = false
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
assert.NilError(t, dispatch(sb, cmd))
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the Healthcheck is disabled.
assert.Check(t, is.DeepEqual([]string{"NONE"}, config.Config.Healthcheck.Test))
return container.ContainerCreateCreatedBody{ID: "123456"}, nil
}
sb.state.buildArgs.AddArg("one", strPtr("two"))
run := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
assert.NilError(t, dispatch(sb, run))
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestDispatchUnsupportedOptions(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
sb.state.operatingSystem = runtime.GOOS
t.Run("ADD with chmod", func(t *testing.T) {
cmd := &instructions.AddCommand{SourcesAndDest: []string{".", "."}, Chmod: "0655"}
err := dispatch(sb, cmd)
assert.Error(t, err, "the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
})
t.Run("COPY with chmod", func(t *testing.T) {
cmd := &instructions.CopyCommand{SourcesAndDest: []string{".", "."}, Chmod: "0655"}
err := dispatch(sb, cmd)
assert.Error(t, err, "the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
})
t.Run("RUN with unsupported options", func(t *testing.T) {
cmd := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
// classic builder "RUN" currently doesn't support any flags, but testing
// both "known" flags and "bogus" flags for completeness, and in case
// one or more of these flags will be supported in future
for _, f := range []string{"mount", "network", "security", "any-flag"} {
cmd.FlagsUsed = []string{f}
err := dispatch(sb, cmd)
assert.Error(t, err, fmt.Sprintf("the --%s option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled", f))
}
})
}
| thaJeztah | 08e67904c9f7f7e70d4c3bb688d05301f5fdf7e4 | 797b974cb90e32c7efe9e324d7459122c3f6b7b0 | "the --any-flag option requires BuildKit" is slightly inaccurate. What about "the --%s option is not supported on legacy mode" | AkihiroSuda | 5,039 |
moby/moby | 41,912 | builder: produce error when using unsupported Dockerfile option | fixes https://github.com/moby/moby/issues/41911
depends on
- [x] https://github.com/moby/moby/pull/42056 vendor: github.com/moby/buildkit v0.8.2
- [x] depends on https://github.com/moby/buildkit/pull/1954 / https://github.com/moby/buildkit/pull/1971
### builder: produce error when using unsupported Dockerfile option
With the promotion of the experimental Dockerfile syntax to "stable", the Dockerfile
syntax now includes some options that are supported by BuildKit, but not (yet)
supported in the classic builder.
As a result, parsing a Dockerfile may succeed, but any flag that's known to BuildKit,
but not supported by the classic builder is silently ignored;
$ mkdir buildkit_flags && cd buildkit_flags
$ touch foo.txt
For example, `RUN --mount`:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
---> Running in 022fdb856bc8
hello
Removing intermediate container 022fdb856bc8
---> e9f0988844d1
Successfully built e9f0988844d1
Or `COPY --chmod` (same for `ADD --chmod`):
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
---> 8b7117932a2a
Successfully built 8b7117932a2a
Note that unknown flags still produce and error, for example, the below fails because `--hello` is an unknown flag;
DOCKER_BUILDKIT=0 docker build -<<EOF
FROM busybox
RUN --hello echo hello
EOF
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 2: Unknown flag: hello
With this patch applied
----------------------------
With this patch applied, flags that are known in the Dockerfile spec, but are not
supported by the classic builder, produce an error, which includes a link to the
documentation how to enable BuildKit:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
the --mount option BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
```
Fix classic builder silently ignoring unsupported Dockerfile options
```
| null | 2021-01-21 12:30:09+00:00 | 2021-03-24 21:30:45+00:00 | builder/dockerfile/dispatchers_test.go | package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"bytes"
"context"
"runtime"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func newBuilderWithMockBackend() *Builder {
mockBackend := &MockBackend{}
opts := &types.ImageBuildOptions{}
ctx := context.Background()
b := &Builder{
options: opts,
docker: mockBackend,
Stdout: new(bytes.Buffer),
clientCtx: ctx,
disableCommit: true,
imageSources: newImageSources(ctx, builderOptions{
Options: opts,
Backend: mockBackend,
}),
imageProber: newImageProber(mockBackend, nil, false),
containerManager: newContainerManager(mockBackend),
}
return b
}
func TestEnv2Variables(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
instructions.KeyValuePair{Key: "var2", Value: "val2"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=val2",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestEnvValueWithExistingRunConfigEnv(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.runConfig.Env = []string{"var1=old", "var2=fromenv"}
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=fromenv",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestMaintainer(t *testing.T) {
maintainerEntry := "Some Maintainer <[email protected]>"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.MaintainerCommand{Maintainer: maintainerEntry}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(maintainerEntry, sb.state.maintainer))
}
func TestLabel(t *testing.T) {
labelName := "label"
labelValue := "value"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.LabelCommand{
Labels: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: labelName, Value: labelValue},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, is.Contains(sb.state.runConfig.Labels, labelName))
assert.Check(t, is.Equal(sb.state.runConfig.Labels[labelName], labelValue))
}
func TestFromScratch(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.Stage{
BaseName: "scratch",
}
err := initializeStage(sb, cmd)
if runtime.GOOS == "windows" && !system.LCOWSupported() {
assert.Check(t, is.Error(err, "Linux containers are not supported on this system"))
return
}
assert.NilError(t, err)
assert.Check(t, sb.state.hasFromImage())
assert.Check(t, is.Equal("", sb.state.imageID))
expected := "PATH=" + system.DefaultPathEnv(runtime.GOOS)
assert.Check(t, is.DeepEqual([]string{expected}, sb.state.runConfig.Env))
}
func TestFromWithArg(t *testing.T) {
tag, expected := ":sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine"+tag, name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
args := NewBuildArgs(make(map[string]*string))
val := "sometag"
metaArg := instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{
Key: "THETAG",
Value: &val,
}}}
cmd := &instructions.Stage{
BaseName: "alpine:${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
assert.Check(t, is.Equal(expected, sb.state.baseImage.ImageID()))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllAllowed(), 0))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllMeta(), 1))
}
func TestFromWithArgButBuildArgsNotGiven(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
metaArg := instructions.ArgCommand{}
cmd := &instructions.Stage{
BaseName: "${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.Error(t, err, "base name (${THETAG}) should not be blank")
}
func TestFromWithUndefinedArg(t *testing.T) {
tag, expected := "sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine", name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
b.options.BuildArgs = map[string]*string{"THETAG": &tag}
cmd := &instructions.Stage{
BaseName: "alpine${THETAG}",
}
err := initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
}
func TestFromMultiStageWithNamedStage(t *testing.T) {
b := newBuilderWithMockBackend()
firstFrom := &instructions.Stage{BaseName: "someimg", Name: "base"}
secondFrom := &instructions.Stage{BaseName: "base"}
previousResults := newStagesBuildResults()
firstSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
secondSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
err := initializeStage(firstSB, firstFrom)
assert.NilError(t, err)
assert.Check(t, firstSB.state.hasFromImage())
previousResults.indexed["base"] = firstSB.state.runConfig
previousResults.flat = append(previousResults.flat, firstSB.state.runConfig)
err = initializeStage(secondSB, secondFrom)
assert.NilError(t, err)
assert.Check(t, secondSB.state.hasFromImage())
}
func TestOnbuild(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.OnbuildCommand{
Expression: "ADD . /app/src",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("ADD . /app/src", sb.state.runConfig.OnBuild[0]))
}
func TestWorkdir(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
workingDir := "/app"
if runtime.GOOS == "windows" {
workingDir = "C:\\app"
}
cmd := &instructions.WorkdirCommand{
Path: workingDir,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(workingDir, sb.state.runConfig.WorkingDir))
}
func TestCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
command := "./executable"
cmd := &instructions.CmdCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{command},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
var expectedCommand strslice.StrSlice
if runtime.GOOS == "windows" {
expectedCommand = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", command))
} else {
expectedCommand = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", command))
}
assert.Check(t, is.DeepEqual(expectedCommand, sb.state.runConfig.Cmd))
assert.Check(t, sb.state.cmdSet)
}
func TestHealthcheckNone(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: []string{"NONE"},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual([]string{"NONE"}, sb.state.runConfig.Healthcheck.Test))
}
func TestHealthcheckCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestEntrypoint(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
entrypointCmd := "/usr/sbin/nginx"
cmd := &instructions.EntrypointCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{entrypointCmd},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Entrypoint != nil)
var expectedEntrypoint strslice.StrSlice
if runtime.GOOS == "windows" {
expectedEntrypoint = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", entrypointCmd))
} else {
expectedEntrypoint = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", entrypointCmd))
}
assert.Check(t, is.DeepEqual(expectedEntrypoint, sb.state.runConfig.Entrypoint))
}
func TestExpose(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedPort := "80"
cmd := &instructions.ExposeCommand{
Ports: []string{exposedPort},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.ExposedPorts != nil)
assert.Assert(t, is.Len(sb.state.runConfig.ExposedPorts, 1))
portsMapping, err := nat.ParsePortSpec(exposedPort)
assert.NilError(t, err)
assert.Check(t, is.Contains(sb.state.runConfig.ExposedPorts, portsMapping[0].Port))
}
func TestUser(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.UserCommand{
User: "test",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("test", sb.state.runConfig.User))
}
func TestVolume(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedVolume := "/foo"
cmd := &instructions.VolumeCommand{
Volumes: []string{exposedVolume},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Volumes != nil)
assert.Check(t, is.Len(sb.state.runConfig.Volumes, 1))
assert.Check(t, is.Contains(sb.state.runConfig.Volumes, exposedVolume))
}
func TestStopSignal(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Windows does not support stopsignal")
return
}
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
signal := "SIGKILL"
cmd := &instructions.StopSignalCommand{
Signal: signal,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(signal, sb.state.runConfig.StopSignal))
}
func TestArg(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
argName := "foo"
argVal := "bar"
cmd := &instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{Key: argName, Value: &argVal}}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expected := map[string]string{argName: argVal}
assert.Check(t, is.DeepEqual(expected, sb.state.buildArgs.GetAllAllowed()))
}
func TestShell(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
shellCmd := "powershell"
cmd := &instructions.ShellCommand{Shell: strslice.StrSlice{shellCmd}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expectedShell := strslice.StrSlice([]string{shellCmd})
assert.Check(t, is.DeepEqual(expectedShell, sb.state.runConfig.Shell))
}
func TestPrependEnvOnCmd(t *testing.T) {
buildArgs := NewBuildArgs(nil)
buildArgs.AddArg("NO_PROXY", nil)
args := []string{"sorted=nope", "args=not", "http_proxy=foo", "NO_PROXY=YA"}
cmd := []string{"foo", "bar"}
cmdWithEnv := prependEnvOnCmd(buildArgs, args, cmd)
expected := strslice.StrSlice([]string{
"|3", "NO_PROXY=YA", "args=not", "sorted=nope", "foo", "bar"})
assert.Check(t, is.DeepEqual(expected, cmdWithEnv))
}
func TestRunWithBuildArgs(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
args.argsFromOptions["HTTP_PROXY"] = strPtr("FOO")
b.disableCommit = false
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
runConfig := &container.Config{}
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
var cmdWithShell strslice.StrSlice
if runtime.GOOS == "windows" {
cmdWithShell = strslice.StrSlice([]string{strings.Join(append(getShell(runConfig, runtime.GOOS), []string{"echo foo"}...), " ")})
} else {
cmdWithShell = strslice.StrSlice(append(getShell(runConfig, runtime.GOOS), "echo foo"))
}
envVars := []string{"|1", "one=two"}
cachedCmd := strslice.StrSlice(append(envVars, cmdWithShell...))
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
// Check the runConfig.Cmd sent to probeCache()
assert.Check(t, is.DeepEqual(cachedCmd, cfg.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Entrypoint))
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the runConfig.Cmd sent to create()
assert.Check(t, is.DeepEqual(cmdWithShell, config.Config.Cmd))
assert.Check(t, is.Contains(config.Config.Env, "one=two"))
assert.Check(t, is.DeepEqual(strslice.StrSlice{""}, config.Config.Entrypoint))
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
// Check the runConfig.Cmd sent to commit()
assert.Check(t, is.DeepEqual(origCmd, cfg.Config.Cmd))
assert.Check(t, is.DeepEqual(cachedCmd, cfg.ContainerConfig.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Config.Entrypoint))
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
sb.state.buildArgs.AddArg("one", strPtr("two"))
// This is hugely annoying. On the Windows side, it relies on the
// RunCommand being able to emit String() and Name() (as implemented by
// withNameAndCode). Unfortunately, that is internal, and no way to directly
// set. However, we can fortunately use ParseInstruction in the instructions
// package to parse a fake node which can be used as our instructions.RunCommand
// instead.
node := &parser.Node{
Original: `RUN echo foo`,
Value: "run",
}
runint, err := instructions.ParseInstruction(node)
assert.NilError(t, err)
runinst := runint.(*instructions.RunCommand)
runinst.CmdLine = strslice.StrSlice{"echo foo"}
runinst.PrependShell = true
assert.NilError(t, dispatch(sb, runinst))
// Check that runConfig.Cmd has not been modified by run
assert.Check(t, is.DeepEqual(origCmd, sb.state.runConfig.Cmd))
}
func TestRunIgnoresHealthcheck(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
b.disableCommit = false
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
assert.NilError(t, dispatch(sb, cmd))
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the Healthcheck is disabled.
assert.Check(t, is.DeepEqual([]string{"NONE"}, config.Config.Healthcheck.Test))
return container.ContainerCreateCreatedBody{ID: "123456"}, nil
}
sb.state.buildArgs.AddArg("one", strPtr("two"))
run := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
assert.NilError(t, dispatch(sb, run))
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
| package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"bytes"
"context"
"fmt"
"runtime"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func newBuilderWithMockBackend() *Builder {
mockBackend := &MockBackend{}
opts := &types.ImageBuildOptions{}
ctx := context.Background()
b := &Builder{
options: opts,
docker: mockBackend,
Stdout: new(bytes.Buffer),
clientCtx: ctx,
disableCommit: true,
imageSources: newImageSources(ctx, builderOptions{
Options: opts,
Backend: mockBackend,
}),
imageProber: newImageProber(mockBackend, nil, false),
containerManager: newContainerManager(mockBackend),
}
return b
}
func TestEnv2Variables(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
instructions.KeyValuePair{Key: "var2", Value: "val2"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=val2",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestEnvValueWithExistingRunConfigEnv(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.runConfig.Env = []string{"var1=old", "var2=fromenv"}
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=fromenv",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestMaintainer(t *testing.T) {
maintainerEntry := "Some Maintainer <[email protected]>"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.MaintainerCommand{Maintainer: maintainerEntry}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(maintainerEntry, sb.state.maintainer))
}
func TestLabel(t *testing.T) {
labelName := "label"
labelValue := "value"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.LabelCommand{
Labels: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: labelName, Value: labelValue},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, is.Contains(sb.state.runConfig.Labels, labelName))
assert.Check(t, is.Equal(sb.state.runConfig.Labels[labelName], labelValue))
}
func TestFromScratch(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.Stage{
BaseName: "scratch",
}
err := initializeStage(sb, cmd)
if runtime.GOOS == "windows" && !system.LCOWSupported() {
assert.Check(t, is.Error(err, "Linux containers are not supported on this system"))
return
}
assert.NilError(t, err)
assert.Check(t, sb.state.hasFromImage())
assert.Check(t, is.Equal("", sb.state.imageID))
expected := "PATH=" + system.DefaultPathEnv(runtime.GOOS)
assert.Check(t, is.DeepEqual([]string{expected}, sb.state.runConfig.Env))
}
func TestFromWithArg(t *testing.T) {
tag, expected := ":sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine"+tag, name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
args := NewBuildArgs(make(map[string]*string))
val := "sometag"
metaArg := instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{
Key: "THETAG",
Value: &val,
}}}
cmd := &instructions.Stage{
BaseName: "alpine:${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
assert.Check(t, is.Equal(expected, sb.state.baseImage.ImageID()))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllAllowed(), 0))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllMeta(), 1))
}
func TestFromWithArgButBuildArgsNotGiven(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
metaArg := instructions.ArgCommand{}
cmd := &instructions.Stage{
BaseName: "${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.Error(t, err, "base name (${THETAG}) should not be blank")
}
func TestFromWithUndefinedArg(t *testing.T) {
tag, expected := "sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine", name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
b.options.BuildArgs = map[string]*string{"THETAG": &tag}
cmd := &instructions.Stage{
BaseName: "alpine${THETAG}",
}
err := initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
}
func TestFromMultiStageWithNamedStage(t *testing.T) {
b := newBuilderWithMockBackend()
firstFrom := &instructions.Stage{BaseName: "someimg", Name: "base"}
secondFrom := &instructions.Stage{BaseName: "base"}
previousResults := newStagesBuildResults()
firstSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
secondSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
err := initializeStage(firstSB, firstFrom)
assert.NilError(t, err)
assert.Check(t, firstSB.state.hasFromImage())
previousResults.indexed["base"] = firstSB.state.runConfig
previousResults.flat = append(previousResults.flat, firstSB.state.runConfig)
err = initializeStage(secondSB, secondFrom)
assert.NilError(t, err)
assert.Check(t, secondSB.state.hasFromImage())
}
func TestOnbuild(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.OnbuildCommand{
Expression: "ADD . /app/src",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("ADD . /app/src", sb.state.runConfig.OnBuild[0]))
}
func TestWorkdir(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
workingDir := "/app"
if runtime.GOOS == "windows" {
workingDir = "C:\\app"
}
cmd := &instructions.WorkdirCommand{
Path: workingDir,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(workingDir, sb.state.runConfig.WorkingDir))
}
func TestCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
command := "./executable"
cmd := &instructions.CmdCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{command},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
var expectedCommand strslice.StrSlice
if runtime.GOOS == "windows" {
expectedCommand = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", command))
} else {
expectedCommand = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", command))
}
assert.Check(t, is.DeepEqual(expectedCommand, sb.state.runConfig.Cmd))
assert.Check(t, sb.state.cmdSet)
}
func TestHealthcheckNone(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: []string{"NONE"},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual([]string{"NONE"}, sb.state.runConfig.Healthcheck.Test))
}
func TestHealthcheckCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestEntrypoint(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
entrypointCmd := "/usr/sbin/nginx"
cmd := &instructions.EntrypointCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{entrypointCmd},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Entrypoint != nil)
var expectedEntrypoint strslice.StrSlice
if runtime.GOOS == "windows" {
expectedEntrypoint = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", entrypointCmd))
} else {
expectedEntrypoint = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", entrypointCmd))
}
assert.Check(t, is.DeepEqual(expectedEntrypoint, sb.state.runConfig.Entrypoint))
}
func TestExpose(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedPort := "80"
cmd := &instructions.ExposeCommand{
Ports: []string{exposedPort},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.ExposedPorts != nil)
assert.Assert(t, is.Len(sb.state.runConfig.ExposedPorts, 1))
portsMapping, err := nat.ParsePortSpec(exposedPort)
assert.NilError(t, err)
assert.Check(t, is.Contains(sb.state.runConfig.ExposedPorts, portsMapping[0].Port))
}
func TestUser(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.UserCommand{
User: "test",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("test", sb.state.runConfig.User))
}
func TestVolume(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedVolume := "/foo"
cmd := &instructions.VolumeCommand{
Volumes: []string{exposedVolume},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Volumes != nil)
assert.Check(t, is.Len(sb.state.runConfig.Volumes, 1))
assert.Check(t, is.Contains(sb.state.runConfig.Volumes, exposedVolume))
}
func TestStopSignal(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Windows does not support stopsignal")
return
}
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
signal := "SIGKILL"
cmd := &instructions.StopSignalCommand{
Signal: signal,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(signal, sb.state.runConfig.StopSignal))
}
func TestArg(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
argName := "foo"
argVal := "bar"
cmd := &instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{Key: argName, Value: &argVal}}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expected := map[string]string{argName: argVal}
assert.Check(t, is.DeepEqual(expected, sb.state.buildArgs.GetAllAllowed()))
}
func TestShell(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
shellCmd := "powershell"
cmd := &instructions.ShellCommand{Shell: strslice.StrSlice{shellCmd}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expectedShell := strslice.StrSlice([]string{shellCmd})
assert.Check(t, is.DeepEqual(expectedShell, sb.state.runConfig.Shell))
}
func TestPrependEnvOnCmd(t *testing.T) {
buildArgs := NewBuildArgs(nil)
buildArgs.AddArg("NO_PROXY", nil)
args := []string{"sorted=nope", "args=not", "http_proxy=foo", "NO_PROXY=YA"}
cmd := []string{"foo", "bar"}
cmdWithEnv := prependEnvOnCmd(buildArgs, args, cmd)
expected := strslice.StrSlice([]string{
"|3", "NO_PROXY=YA", "args=not", "sorted=nope", "foo", "bar"})
assert.Check(t, is.DeepEqual(expected, cmdWithEnv))
}
func TestRunWithBuildArgs(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
args.argsFromOptions["HTTP_PROXY"] = strPtr("FOO")
b.disableCommit = false
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
runConfig := &container.Config{}
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
var cmdWithShell strslice.StrSlice
if runtime.GOOS == "windows" {
cmdWithShell = strslice.StrSlice([]string{strings.Join(append(getShell(runConfig, runtime.GOOS), []string{"echo foo"}...), " ")})
} else {
cmdWithShell = strslice.StrSlice(append(getShell(runConfig, runtime.GOOS), "echo foo"))
}
envVars := []string{"|1", "one=two"}
cachedCmd := strslice.StrSlice(append(envVars, cmdWithShell...))
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
// Check the runConfig.Cmd sent to probeCache()
assert.Check(t, is.DeepEqual(cachedCmd, cfg.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Entrypoint))
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the runConfig.Cmd sent to create()
assert.Check(t, is.DeepEqual(cmdWithShell, config.Config.Cmd))
assert.Check(t, is.Contains(config.Config.Env, "one=two"))
assert.Check(t, is.DeepEqual(strslice.StrSlice{""}, config.Config.Entrypoint))
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
// Check the runConfig.Cmd sent to commit()
assert.Check(t, is.DeepEqual(origCmd, cfg.Config.Cmd))
assert.Check(t, is.DeepEqual(cachedCmd, cfg.ContainerConfig.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Config.Entrypoint))
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
sb.state.buildArgs.AddArg("one", strPtr("two"))
// This is hugely annoying. On the Windows side, it relies on the
// RunCommand being able to emit String() and Name() (as implemented by
// withNameAndCode). Unfortunately, that is internal, and no way to directly
// set. However, we can fortunately use ParseInstruction in the instructions
// package to parse a fake node which can be used as our instructions.RunCommand
// instead.
node := &parser.Node{
Original: `RUN echo foo`,
Value: "run",
}
runint, err := instructions.ParseInstruction(node)
assert.NilError(t, err)
runinst := runint.(*instructions.RunCommand)
runinst.CmdLine = strslice.StrSlice{"echo foo"}
runinst.PrependShell = true
assert.NilError(t, dispatch(sb, runinst))
// Check that runConfig.Cmd has not been modified by run
assert.Check(t, is.DeepEqual(origCmd, sb.state.runConfig.Cmd))
}
func TestRunIgnoresHealthcheck(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
b.disableCommit = false
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
assert.NilError(t, dispatch(sb, cmd))
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the Healthcheck is disabled.
assert.Check(t, is.DeepEqual([]string{"NONE"}, config.Config.Healthcheck.Test))
return container.ContainerCreateCreatedBody{ID: "123456"}, nil
}
sb.state.buildArgs.AddArg("one", strPtr("two"))
run := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
assert.NilError(t, dispatch(sb, run))
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestDispatchUnsupportedOptions(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
sb.state.operatingSystem = runtime.GOOS
t.Run("ADD with chmod", func(t *testing.T) {
cmd := &instructions.AddCommand{SourcesAndDest: []string{".", "."}, Chmod: "0655"}
err := dispatch(sb, cmd)
assert.Error(t, err, "the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
})
t.Run("COPY with chmod", func(t *testing.T) {
cmd := &instructions.CopyCommand{SourcesAndDest: []string{".", "."}, Chmod: "0655"}
err := dispatch(sb, cmd)
assert.Error(t, err, "the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
})
t.Run("RUN with unsupported options", func(t *testing.T) {
cmd := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
// classic builder "RUN" currently doesn't support any flags, but testing
// both "known" flags and "bogus" flags for completeness, and in case
// one or more of these flags will be supported in future
for _, f := range []string{"mount", "network", "security", "any-flag"} {
cmd.FlagsUsed = []string{f}
err := dispatch(sb, cmd)
assert.Error(t, err, fmt.Sprintf("the --%s option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled", f))
}
})
}
| thaJeztah | 08e67904c9f7f7e70d4c3bb688d05301f5fdf7e4 | 797b974cb90e32c7efe9e324d7459122c3f6b7b0 | Hmmm... yes, that's a bit tricky; it would indeed suggest that in case someone made an actual `RUN --i-made-a-typo`, it would print the standard message; do you think we should keep an actual list of _known_ options? | thaJeztah | 5,040 |
moby/moby | 41,912 | builder: produce error when using unsupported Dockerfile option | fixes https://github.com/moby/moby/issues/41911
depends on
- [x] https://github.com/moby/moby/pull/42056 vendor: github.com/moby/buildkit v0.8.2
- [x] depends on https://github.com/moby/buildkit/pull/1954 / https://github.com/moby/buildkit/pull/1971
### builder: produce error when using unsupported Dockerfile option
With the promotion of the experimental Dockerfile syntax to "stable", the Dockerfile
syntax now includes some options that are supported by BuildKit, but not (yet)
supported in the classic builder.
As a result, parsing a Dockerfile may succeed, but any flag that's known to BuildKit,
but not supported by the classic builder is silently ignored;
$ mkdir buildkit_flags && cd buildkit_flags
$ touch foo.txt
For example, `RUN --mount`:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
---> Running in 022fdb856bc8
hello
Removing intermediate container 022fdb856bc8
---> e9f0988844d1
Successfully built e9f0988844d1
Or `COPY --chmod` (same for `ADD --chmod`):
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> 219ee5171f80
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
---> 8b7117932a2a
Successfully built 8b7117932a2a
Note that unknown flags still produce and error, for example, the below fails because `--hello` is an unknown flag;
DOCKER_BUILDKIT=0 docker build -<<EOF
FROM busybox
RUN --hello echo hello
EOF
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 2: Unknown flag: hello
With this patch applied
----------------------------
With this patch applied, flags that are known in the Dockerfile spec, but are not
supported by the classic builder, produce an error, which includes a link to the
documentation how to enable BuildKit:
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
RUN --mount=type=cache,target=/foo echo hello
EOF
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : RUN --mount=type=cache,target=/foo echo hello
the --mount option BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
DOCKER_BUILDKIT=0 docker build --no-cache -f- . <<EOF
FROM busybox
COPY --chmod=0777 /foo.txt /foo.txt
EOF
Sending build context to Docker daemon 2.095kB
Step 1/2 : FROM busybox
---> b97242f89c8a
Step 2/2 : COPY --chmod=0777 /foo.txt /foo.txt
the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
```
Fix classic builder silently ignoring unsupported Dockerfile options
```
| null | 2021-01-21 12:30:09+00:00 | 2021-03-24 21:30:45+00:00 | builder/dockerfile/dispatchers_test.go | package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"bytes"
"context"
"runtime"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func newBuilderWithMockBackend() *Builder {
mockBackend := &MockBackend{}
opts := &types.ImageBuildOptions{}
ctx := context.Background()
b := &Builder{
options: opts,
docker: mockBackend,
Stdout: new(bytes.Buffer),
clientCtx: ctx,
disableCommit: true,
imageSources: newImageSources(ctx, builderOptions{
Options: opts,
Backend: mockBackend,
}),
imageProber: newImageProber(mockBackend, nil, false),
containerManager: newContainerManager(mockBackend),
}
return b
}
func TestEnv2Variables(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
instructions.KeyValuePair{Key: "var2", Value: "val2"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=val2",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestEnvValueWithExistingRunConfigEnv(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.runConfig.Env = []string{"var1=old", "var2=fromenv"}
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=fromenv",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestMaintainer(t *testing.T) {
maintainerEntry := "Some Maintainer <[email protected]>"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.MaintainerCommand{Maintainer: maintainerEntry}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(maintainerEntry, sb.state.maintainer))
}
func TestLabel(t *testing.T) {
labelName := "label"
labelValue := "value"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.LabelCommand{
Labels: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: labelName, Value: labelValue},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, is.Contains(sb.state.runConfig.Labels, labelName))
assert.Check(t, is.Equal(sb.state.runConfig.Labels[labelName], labelValue))
}
func TestFromScratch(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.Stage{
BaseName: "scratch",
}
err := initializeStage(sb, cmd)
if runtime.GOOS == "windows" && !system.LCOWSupported() {
assert.Check(t, is.Error(err, "Linux containers are not supported on this system"))
return
}
assert.NilError(t, err)
assert.Check(t, sb.state.hasFromImage())
assert.Check(t, is.Equal("", sb.state.imageID))
expected := "PATH=" + system.DefaultPathEnv(runtime.GOOS)
assert.Check(t, is.DeepEqual([]string{expected}, sb.state.runConfig.Env))
}
func TestFromWithArg(t *testing.T) {
tag, expected := ":sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine"+tag, name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
args := NewBuildArgs(make(map[string]*string))
val := "sometag"
metaArg := instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{
Key: "THETAG",
Value: &val,
}}}
cmd := &instructions.Stage{
BaseName: "alpine:${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
assert.Check(t, is.Equal(expected, sb.state.baseImage.ImageID()))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllAllowed(), 0))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllMeta(), 1))
}
func TestFromWithArgButBuildArgsNotGiven(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
metaArg := instructions.ArgCommand{}
cmd := &instructions.Stage{
BaseName: "${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.Error(t, err, "base name (${THETAG}) should not be blank")
}
func TestFromWithUndefinedArg(t *testing.T) {
tag, expected := "sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine", name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
b.options.BuildArgs = map[string]*string{"THETAG": &tag}
cmd := &instructions.Stage{
BaseName: "alpine${THETAG}",
}
err := initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
}
func TestFromMultiStageWithNamedStage(t *testing.T) {
b := newBuilderWithMockBackend()
firstFrom := &instructions.Stage{BaseName: "someimg", Name: "base"}
secondFrom := &instructions.Stage{BaseName: "base"}
previousResults := newStagesBuildResults()
firstSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
secondSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
err := initializeStage(firstSB, firstFrom)
assert.NilError(t, err)
assert.Check(t, firstSB.state.hasFromImage())
previousResults.indexed["base"] = firstSB.state.runConfig
previousResults.flat = append(previousResults.flat, firstSB.state.runConfig)
err = initializeStage(secondSB, secondFrom)
assert.NilError(t, err)
assert.Check(t, secondSB.state.hasFromImage())
}
func TestOnbuild(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.OnbuildCommand{
Expression: "ADD . /app/src",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("ADD . /app/src", sb.state.runConfig.OnBuild[0]))
}
func TestWorkdir(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
workingDir := "/app"
if runtime.GOOS == "windows" {
workingDir = "C:\\app"
}
cmd := &instructions.WorkdirCommand{
Path: workingDir,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(workingDir, sb.state.runConfig.WorkingDir))
}
func TestCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
command := "./executable"
cmd := &instructions.CmdCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{command},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
var expectedCommand strslice.StrSlice
if runtime.GOOS == "windows" {
expectedCommand = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", command))
} else {
expectedCommand = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", command))
}
assert.Check(t, is.DeepEqual(expectedCommand, sb.state.runConfig.Cmd))
assert.Check(t, sb.state.cmdSet)
}
func TestHealthcheckNone(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: []string{"NONE"},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual([]string{"NONE"}, sb.state.runConfig.Healthcheck.Test))
}
func TestHealthcheckCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestEntrypoint(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
entrypointCmd := "/usr/sbin/nginx"
cmd := &instructions.EntrypointCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{entrypointCmd},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Entrypoint != nil)
var expectedEntrypoint strslice.StrSlice
if runtime.GOOS == "windows" {
expectedEntrypoint = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", entrypointCmd))
} else {
expectedEntrypoint = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", entrypointCmd))
}
assert.Check(t, is.DeepEqual(expectedEntrypoint, sb.state.runConfig.Entrypoint))
}
func TestExpose(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedPort := "80"
cmd := &instructions.ExposeCommand{
Ports: []string{exposedPort},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.ExposedPorts != nil)
assert.Assert(t, is.Len(sb.state.runConfig.ExposedPorts, 1))
portsMapping, err := nat.ParsePortSpec(exposedPort)
assert.NilError(t, err)
assert.Check(t, is.Contains(sb.state.runConfig.ExposedPorts, portsMapping[0].Port))
}
func TestUser(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.UserCommand{
User: "test",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("test", sb.state.runConfig.User))
}
func TestVolume(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedVolume := "/foo"
cmd := &instructions.VolumeCommand{
Volumes: []string{exposedVolume},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Volumes != nil)
assert.Check(t, is.Len(sb.state.runConfig.Volumes, 1))
assert.Check(t, is.Contains(sb.state.runConfig.Volumes, exposedVolume))
}
func TestStopSignal(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Windows does not support stopsignal")
return
}
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
signal := "SIGKILL"
cmd := &instructions.StopSignalCommand{
Signal: signal,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(signal, sb.state.runConfig.StopSignal))
}
func TestArg(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
argName := "foo"
argVal := "bar"
cmd := &instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{Key: argName, Value: &argVal}}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expected := map[string]string{argName: argVal}
assert.Check(t, is.DeepEqual(expected, sb.state.buildArgs.GetAllAllowed()))
}
func TestShell(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
shellCmd := "powershell"
cmd := &instructions.ShellCommand{Shell: strslice.StrSlice{shellCmd}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expectedShell := strslice.StrSlice([]string{shellCmd})
assert.Check(t, is.DeepEqual(expectedShell, sb.state.runConfig.Shell))
}
func TestPrependEnvOnCmd(t *testing.T) {
buildArgs := NewBuildArgs(nil)
buildArgs.AddArg("NO_PROXY", nil)
args := []string{"sorted=nope", "args=not", "http_proxy=foo", "NO_PROXY=YA"}
cmd := []string{"foo", "bar"}
cmdWithEnv := prependEnvOnCmd(buildArgs, args, cmd)
expected := strslice.StrSlice([]string{
"|3", "NO_PROXY=YA", "args=not", "sorted=nope", "foo", "bar"})
assert.Check(t, is.DeepEqual(expected, cmdWithEnv))
}
func TestRunWithBuildArgs(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
args.argsFromOptions["HTTP_PROXY"] = strPtr("FOO")
b.disableCommit = false
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
runConfig := &container.Config{}
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
var cmdWithShell strslice.StrSlice
if runtime.GOOS == "windows" {
cmdWithShell = strslice.StrSlice([]string{strings.Join(append(getShell(runConfig, runtime.GOOS), []string{"echo foo"}...), " ")})
} else {
cmdWithShell = strslice.StrSlice(append(getShell(runConfig, runtime.GOOS), "echo foo"))
}
envVars := []string{"|1", "one=two"}
cachedCmd := strslice.StrSlice(append(envVars, cmdWithShell...))
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
// Check the runConfig.Cmd sent to probeCache()
assert.Check(t, is.DeepEqual(cachedCmd, cfg.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Entrypoint))
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the runConfig.Cmd sent to create()
assert.Check(t, is.DeepEqual(cmdWithShell, config.Config.Cmd))
assert.Check(t, is.Contains(config.Config.Env, "one=two"))
assert.Check(t, is.DeepEqual(strslice.StrSlice{""}, config.Config.Entrypoint))
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
// Check the runConfig.Cmd sent to commit()
assert.Check(t, is.DeepEqual(origCmd, cfg.Config.Cmd))
assert.Check(t, is.DeepEqual(cachedCmd, cfg.ContainerConfig.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Config.Entrypoint))
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
sb.state.buildArgs.AddArg("one", strPtr("two"))
// This is hugely annoying. On the Windows side, it relies on the
// RunCommand being able to emit String() and Name() (as implemented by
// withNameAndCode). Unfortunately, that is internal, and no way to directly
// set. However, we can fortunately use ParseInstruction in the instructions
// package to parse a fake node which can be used as our instructions.RunCommand
// instead.
node := &parser.Node{
Original: `RUN echo foo`,
Value: "run",
}
runint, err := instructions.ParseInstruction(node)
assert.NilError(t, err)
runinst := runint.(*instructions.RunCommand)
runinst.CmdLine = strslice.StrSlice{"echo foo"}
runinst.PrependShell = true
assert.NilError(t, dispatch(sb, runinst))
// Check that runConfig.Cmd has not been modified by run
assert.Check(t, is.DeepEqual(origCmd, sb.state.runConfig.Cmd))
}
func TestRunIgnoresHealthcheck(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
b.disableCommit = false
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
assert.NilError(t, dispatch(sb, cmd))
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the Healthcheck is disabled.
assert.Check(t, is.DeepEqual([]string{"NONE"}, config.Config.Healthcheck.Test))
return container.ContainerCreateCreatedBody{ID: "123456"}, nil
}
sb.state.buildArgs.AddArg("one", strPtr("two"))
run := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
assert.NilError(t, dispatch(sb, run))
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
| package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"bytes"
"context"
"fmt"
"runtime"
"strings"
"testing"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/strslice"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/system"
"github.com/docker/go-connections/nat"
"github.com/moby/buildkit/frontend/dockerfile/instructions"
"github.com/moby/buildkit/frontend/dockerfile/parser"
"github.com/moby/buildkit/frontend/dockerfile/shell"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func newBuilderWithMockBackend() *Builder {
mockBackend := &MockBackend{}
opts := &types.ImageBuildOptions{}
ctx := context.Background()
b := &Builder{
options: opts,
docker: mockBackend,
Stdout: new(bytes.Buffer),
clientCtx: ctx,
disableCommit: true,
imageSources: newImageSources(ctx, builderOptions{
Options: opts,
Backend: mockBackend,
}),
imageProber: newImageProber(mockBackend, nil, false),
containerManager: newContainerManager(mockBackend),
}
return b
}
func TestEnv2Variables(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
instructions.KeyValuePair{Key: "var2", Value: "val2"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=val2",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestEnvValueWithExistingRunConfigEnv(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.runConfig.Env = []string{"var1=old", "var2=fromenv"}
envCommand := &instructions.EnvCommand{
Env: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: "var1", Value: "val1"},
},
}
err := dispatch(sb, envCommand)
assert.NilError(t, err)
expected := []string{
"var1=val1",
"var2=fromenv",
}
assert.Check(t, is.DeepEqual(expected, sb.state.runConfig.Env))
}
func TestMaintainer(t *testing.T) {
maintainerEntry := "Some Maintainer <[email protected]>"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.MaintainerCommand{Maintainer: maintainerEntry}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(maintainerEntry, sb.state.maintainer))
}
func TestLabel(t *testing.T) {
labelName := "label"
labelValue := "value"
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.LabelCommand{
Labels: instructions.KeyValuePairs{
instructions.KeyValuePair{Key: labelName, Value: labelValue},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, is.Contains(sb.state.runConfig.Labels, labelName))
assert.Check(t, is.Equal(sb.state.runConfig.Labels[labelName], labelValue))
}
func TestFromScratch(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.Stage{
BaseName: "scratch",
}
err := initializeStage(sb, cmd)
if runtime.GOOS == "windows" && !system.LCOWSupported() {
assert.Check(t, is.Error(err, "Linux containers are not supported on this system"))
return
}
assert.NilError(t, err)
assert.Check(t, sb.state.hasFromImage())
assert.Check(t, is.Equal("", sb.state.imageID))
expected := "PATH=" + system.DefaultPathEnv(runtime.GOOS)
assert.Check(t, is.DeepEqual([]string{expected}, sb.state.runConfig.Env))
}
func TestFromWithArg(t *testing.T) {
tag, expected := ":sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine"+tag, name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
args := NewBuildArgs(make(map[string]*string))
val := "sometag"
metaArg := instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{
Key: "THETAG",
Value: &val,
}}}
cmd := &instructions.Stage{
BaseName: "alpine:${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
assert.Check(t, is.Equal(expected, sb.state.baseImage.ImageID()))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllAllowed(), 0))
assert.Check(t, is.Len(sb.state.buildArgs.GetAllMeta(), 1))
}
func TestFromWithArgButBuildArgsNotGiven(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
metaArg := instructions.ArgCommand{}
cmd := &instructions.Stage{
BaseName: "${THETAG}",
}
err := processMetaArg(metaArg, shell.NewLex('\\'), args)
sb := newDispatchRequest(b, '\\', nil, args, newStagesBuildResults())
assert.NilError(t, err)
err = initializeStage(sb, cmd)
assert.Error(t, err, "base name (${THETAG}) should not be blank")
}
func TestFromWithUndefinedArg(t *testing.T) {
tag, expected := "sometag", "expectedthisid"
getImage := func(name string) (builder.Image, builder.ROLayer, error) {
assert.Check(t, is.Equal("alpine", name))
return &mockImage{id: "expectedthisid"}, nil, nil
}
b := newBuilderWithMockBackend()
b.docker.(*MockBackend).getImageFunc = getImage
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
b.options.BuildArgs = map[string]*string{"THETAG": &tag}
cmd := &instructions.Stage{
BaseName: "alpine${THETAG}",
}
err := initializeStage(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(expected, sb.state.imageID))
}
func TestFromMultiStageWithNamedStage(t *testing.T) {
b := newBuilderWithMockBackend()
firstFrom := &instructions.Stage{BaseName: "someimg", Name: "base"}
secondFrom := &instructions.Stage{BaseName: "base"}
previousResults := newStagesBuildResults()
firstSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
secondSB := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), previousResults)
err := initializeStage(firstSB, firstFrom)
assert.NilError(t, err)
assert.Check(t, firstSB.state.hasFromImage())
previousResults.indexed["base"] = firstSB.state.runConfig
previousResults.flat = append(previousResults.flat, firstSB.state.runConfig)
err = initializeStage(secondSB, secondFrom)
assert.NilError(t, err)
assert.Check(t, secondSB.state.hasFromImage())
}
func TestOnbuild(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '\\', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.OnbuildCommand{
Expression: "ADD . /app/src",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("ADD . /app/src", sb.state.runConfig.OnBuild[0]))
}
func TestWorkdir(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
workingDir := "/app"
if runtime.GOOS == "windows" {
workingDir = "C:\\app"
}
cmd := &instructions.WorkdirCommand{
Path: workingDir,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(workingDir, sb.state.runConfig.WorkingDir))
}
func TestCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
command := "./executable"
cmd := &instructions.CmdCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{command},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
var expectedCommand strslice.StrSlice
if runtime.GOOS == "windows" {
expectedCommand = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", command))
} else {
expectedCommand = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", command))
}
assert.Check(t, is.DeepEqual(expectedCommand, sb.state.runConfig.Cmd))
assert.Check(t, sb.state.cmdSet)
}
func TestHealthcheckNone(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: []string{"NONE"},
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual([]string{"NONE"}, sb.state.runConfig.Healthcheck.Test))
}
func TestHealthcheckCmd(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestEntrypoint(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
entrypointCmd := "/usr/sbin/nginx"
cmd := &instructions.EntrypointCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{entrypointCmd},
PrependShell: true,
},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Entrypoint != nil)
var expectedEntrypoint strslice.StrSlice
if runtime.GOOS == "windows" {
expectedEntrypoint = strslice.StrSlice(append([]string{"cmd"}, "/S", "/C", entrypointCmd))
} else {
expectedEntrypoint = strslice.StrSlice(append([]string{"/bin/sh"}, "-c", entrypointCmd))
}
assert.Check(t, is.DeepEqual(expectedEntrypoint, sb.state.runConfig.Entrypoint))
}
func TestExpose(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedPort := "80"
cmd := &instructions.ExposeCommand{
Ports: []string{exposedPort},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.ExposedPorts != nil)
assert.Assert(t, is.Len(sb.state.runConfig.ExposedPorts, 1))
portsMapping, err := nat.ParsePortSpec(exposedPort)
assert.NilError(t, err)
assert.Check(t, is.Contains(sb.state.runConfig.ExposedPorts, portsMapping[0].Port))
}
func TestUser(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
cmd := &instructions.UserCommand{
User: "test",
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal("test", sb.state.runConfig.User))
}
func TestVolume(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
exposedVolume := "/foo"
cmd := &instructions.VolumeCommand{
Volumes: []string{exposedVolume},
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Assert(t, sb.state.runConfig.Volumes != nil)
assert.Check(t, is.Len(sb.state.runConfig.Volumes, 1))
assert.Check(t, is.Contains(sb.state.runConfig.Volumes, exposedVolume))
}
func TestStopSignal(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Windows does not support stopsignal")
return
}
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
signal := "SIGKILL"
cmd := &instructions.StopSignalCommand{
Signal: signal,
}
err := dispatch(sb, cmd)
assert.NilError(t, err)
assert.Check(t, is.Equal(signal, sb.state.runConfig.StopSignal))
}
func TestArg(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
argName := "foo"
argVal := "bar"
cmd := &instructions.ArgCommand{Args: []instructions.KeyValuePairOptional{{Key: argName, Value: &argVal}}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expected := map[string]string{argName: argVal}
assert.Check(t, is.DeepEqual(expected, sb.state.buildArgs.GetAllAllowed()))
}
func TestShell(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
shellCmd := "powershell"
cmd := &instructions.ShellCommand{Shell: strslice.StrSlice{shellCmd}}
err := dispatch(sb, cmd)
assert.NilError(t, err)
expectedShell := strslice.StrSlice([]string{shellCmd})
assert.Check(t, is.DeepEqual(expectedShell, sb.state.runConfig.Shell))
}
func TestPrependEnvOnCmd(t *testing.T) {
buildArgs := NewBuildArgs(nil)
buildArgs.AddArg("NO_PROXY", nil)
args := []string{"sorted=nope", "args=not", "http_proxy=foo", "NO_PROXY=YA"}
cmd := []string{"foo", "bar"}
cmdWithEnv := prependEnvOnCmd(buildArgs, args, cmd)
expected := strslice.StrSlice([]string{
"|3", "NO_PROXY=YA", "args=not", "sorted=nope", "foo", "bar"})
assert.Check(t, is.DeepEqual(expected, cmdWithEnv))
}
func TestRunWithBuildArgs(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
args.argsFromOptions["HTTP_PROXY"] = strPtr("FOO")
b.disableCommit = false
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
runConfig := &container.Config{}
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
var cmdWithShell strslice.StrSlice
if runtime.GOOS == "windows" {
cmdWithShell = strslice.StrSlice([]string{strings.Join(append(getShell(runConfig, runtime.GOOS), []string{"echo foo"}...), " ")})
} else {
cmdWithShell = strslice.StrSlice(append(getShell(runConfig, runtime.GOOS), "echo foo"))
}
envVars := []string{"|1", "one=two"}
cachedCmd := strslice.StrSlice(append(envVars, cmdWithShell...))
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
// Check the runConfig.Cmd sent to probeCache()
assert.Check(t, is.DeepEqual(cachedCmd, cfg.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Entrypoint))
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the runConfig.Cmd sent to create()
assert.Check(t, is.DeepEqual(cmdWithShell, config.Config.Cmd))
assert.Check(t, is.Contains(config.Config.Env, "one=two"))
assert.Check(t, is.DeepEqual(strslice.StrSlice{""}, config.Config.Entrypoint))
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
// Check the runConfig.Cmd sent to commit()
assert.Check(t, is.DeepEqual(origCmd, cfg.Config.Cmd))
assert.Check(t, is.DeepEqual(cachedCmd, cfg.ContainerConfig.Cmd))
assert.Check(t, is.DeepEqual(strslice.StrSlice(nil), cfg.Config.Entrypoint))
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
sb.state.buildArgs.AddArg("one", strPtr("two"))
// This is hugely annoying. On the Windows side, it relies on the
// RunCommand being able to emit String() and Name() (as implemented by
// withNameAndCode). Unfortunately, that is internal, and no way to directly
// set. However, we can fortunately use ParseInstruction in the instructions
// package to parse a fake node which can be used as our instructions.RunCommand
// instead.
node := &parser.Node{
Original: `RUN echo foo`,
Value: "run",
}
runint, err := instructions.ParseInstruction(node)
assert.NilError(t, err)
runinst := runint.(*instructions.RunCommand)
runinst.CmdLine = strslice.StrSlice{"echo foo"}
runinst.PrependShell = true
assert.NilError(t, dispatch(sb, runinst))
// Check that runConfig.Cmd has not been modified by run
assert.Check(t, is.DeepEqual(origCmd, sb.state.runConfig.Cmd))
}
func TestRunIgnoresHealthcheck(t *testing.T) {
b := newBuilderWithMockBackend()
args := NewBuildArgs(make(map[string]*string))
sb := newDispatchRequest(b, '`', nil, args, newStagesBuildResults())
b.disableCommit = false
origCmd := strslice.StrSlice([]string{"cmd", "in", "from", "image"})
imageCache := &mockImageCache{
getCacheFunc: func(parentID string, cfg *container.Config) (string, error) {
return "", nil
},
}
mockBackend := b.docker.(*MockBackend)
mockBackend.makeImageCacheFunc = func(_ []string) builder.ImageCache {
return imageCache
}
b.imageProber = newImageProber(mockBackend, nil, false)
mockBackend.getImageFunc = func(_ string) (builder.Image, builder.ROLayer, error) {
return &mockImage{
id: "abcdef",
config: &container.Config{Cmd: origCmd},
}, nil, nil
}
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
return container.ContainerCreateCreatedBody{ID: "12345"}, nil
}
mockBackend.commitFunc = func(cfg backend.CommitConfig) (image.ID, error) {
return "", nil
}
from := &instructions.Stage{BaseName: "abcdef"}
err := initializeStage(sb, from)
assert.NilError(t, err)
expectedTest := []string{"CMD-SHELL", "curl -f http://localhost/ || exit 1"}
cmd := &instructions.HealthCheckCommand{
Health: &container.HealthConfig{
Test: expectedTest,
},
}
assert.NilError(t, dispatch(sb, cmd))
assert.Assert(t, sb.state.runConfig.Healthcheck != nil)
mockBackend.containerCreateFunc = func(config types.ContainerCreateConfig) (container.ContainerCreateCreatedBody, error) {
// Check the Healthcheck is disabled.
assert.Check(t, is.DeepEqual([]string{"NONE"}, config.Config.Healthcheck.Test))
return container.ContainerCreateCreatedBody{ID: "123456"}, nil
}
sb.state.buildArgs.AddArg("one", strPtr("two"))
run := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
assert.NilError(t, dispatch(sb, run))
assert.Check(t, is.DeepEqual(expectedTest, sb.state.runConfig.Healthcheck.Test))
}
func TestDispatchUnsupportedOptions(t *testing.T) {
b := newBuilderWithMockBackend()
sb := newDispatchRequest(b, '`', nil, NewBuildArgs(make(map[string]*string)), newStagesBuildResults())
sb.state.baseImage = &mockImage{}
sb.state.operatingSystem = runtime.GOOS
t.Run("ADD with chmod", func(t *testing.T) {
cmd := &instructions.AddCommand{SourcesAndDest: []string{".", "."}, Chmod: "0655"}
err := dispatch(sb, cmd)
assert.Error(t, err, "the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
})
t.Run("COPY with chmod", func(t *testing.T) {
cmd := &instructions.CopyCommand{SourcesAndDest: []string{".", "."}, Chmod: "0655"}
err := dispatch(sb, cmd)
assert.Error(t, err, "the --chmod option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled")
})
t.Run("RUN with unsupported options", func(t *testing.T) {
cmd := &instructions.RunCommand{
ShellDependantCmdLine: instructions.ShellDependantCmdLine{
CmdLine: strslice.StrSlice{"echo foo"},
PrependShell: true,
},
}
// classic builder "RUN" currently doesn't support any flags, but testing
// both "known" flags and "bogus" flags for completeness, and in case
// one or more of these flags will be supported in future
for _, f := range []string{"mount", "network", "security", "any-flag"} {
cmd.FlagsUsed = []string{f}
err := dispatch(sb, cmd)
assert.Error(t, err, fmt.Sprintf("the --%s option requires BuildKit. Refer to https://docs.docker.com/go/buildkit/ to learn how to build images with BuildKit enabled", f))
}
})
}
| thaJeztah | 08e67904c9f7f7e70d4c3bb688d05301f5fdf7e4 | 797b974cb90e32c7efe9e324d7459122c3f6b7b0 | oh, actually, that should already be handled, because the frontend will produce an error;
```bash
DOCKER_BUILDKIT=0 docker build -<<EOF
FROM busybox
RUN --no-such-flag echo hello
EOF
Sending build context to Docker daemon 2.048kB
Error response from daemon: dockerfile parse error line 2: Unknown flag: no-such-flag
``` | thaJeztah | 5,041 |
moby/moby | 41,909 | Handle long log messages correctly on SizedLogger | Loggers that implement BufSize() (e.g. awslogs) uses the method to
tell Copier about the maximum log line length. However loggerWithCache
and RingBuffer hide the method by wrapping loggers.
As a result, Copier uses its default 16KB limit which breaks log
lines > 16kB even the destinations can handle that.
This change implements BufSize() on loggerWithCache and RingBuffer to
make sure these logger wrappes don't hide the method on the underlying
loggers.
Fixes #41794.
Signed-off-by: Kazuyoshi Kato <[email protected]>
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
I've added BufSize() to loggerWithCache and RingLogger to make Copier aware about the size limit of the underlying loggers.
**- How I did it**
I've added the method to the structs.
**- How to verify it**
I built Docker and tested the change with `log-split` container image I made.
```
docker run -d --log-driver=awslogs --log-opt mode=non-blocking --log-opt awslogs-group="log-split-test" --log-opt awslogs-region=us-west-2 log-split:latest
```
The Dockerfile for the image is below.
```
FROM ubuntu:18.04
CMD tr -dc A-Za-z0-9 </dev/urandom | head -c 17000; echo ''
```
I also added new unit tests on Copier.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix loggers to make sure they don't break long lines when the destinations' limits allow.
**- A picture of a cute animal (not mandatory but encouraged)**
(From https://www.zoo.org/animals/digital)
| null | 2021-01-20 23:13:00+00:00 | 2021-01-21 13:16:47+00:00 | daemon/logger/awslogs/cloudwatchlogs.go | // Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
package awslogs // import "github.com/docker/docker/daemon/logger/awslogs"
import (
"fmt"
"os"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
"unicode/utf8"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials/endpointcreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/logger/loggerutils"
"github.com/docker/docker/dockerversion"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
name = "awslogs"
regionKey = "awslogs-region"
endpointKey = "awslogs-endpoint"
regionEnvKey = "AWS_REGION"
logGroupKey = "awslogs-group"
logStreamKey = "awslogs-stream"
logCreateGroupKey = "awslogs-create-group"
tagKey = "tag"
datetimeFormatKey = "awslogs-datetime-format"
multilinePatternKey = "awslogs-multiline-pattern"
credentialsEndpointKey = "awslogs-credentials-endpoint"
forceFlushIntervalKey = "awslogs-force-flush-interval-seconds"
maxBufferedEventsKey = "awslogs-max-buffered-events"
defaultForceFlushInterval = 5 * time.Second
defaultMaxBufferedEvents = 4096
// See: http://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html
perEventBytes = 26
maximumBytesPerPut = 1048576
maximumLogEventsPerPut = 10000
// See: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_limits.html
// Because the events are interpreted as UTF-8 encoded Unicode, invalid UTF-8 byte sequences are replaced with the
// Unicode replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To compensate for that and to avoid
// splitting valid UTF-8 characters into invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
maximumBytesPerEvent = 262144 - perEventBytes
resourceAlreadyExistsCode = "ResourceAlreadyExistsException"
dataAlreadyAcceptedCode = "DataAlreadyAcceptedException"
invalidSequenceTokenCode = "InvalidSequenceTokenException"
resourceNotFoundCode = "ResourceNotFoundException"
credentialsEndpoint = "http://169.254.170.2"
userAgentHeader = "User-Agent"
)
type logStream struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
multilinePattern *regexp.Regexp
client api
messages chan *logger.Message
lock sync.RWMutex
closed bool
sequenceToken *string
}
type logStreamConfig struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
maxBufferedEvents int
multilinePattern *regexp.Regexp
}
var _ logger.SizedLogger = &logStream{}
type api interface {
CreateLogGroup(*cloudwatchlogs.CreateLogGroupInput) (*cloudwatchlogs.CreateLogGroupOutput, error)
CreateLogStream(*cloudwatchlogs.CreateLogStreamInput) (*cloudwatchlogs.CreateLogStreamOutput, error)
PutLogEvents(*cloudwatchlogs.PutLogEventsInput) (*cloudwatchlogs.PutLogEventsOutput, error)
}
type regionFinder interface {
Region() (string, error)
}
type wrappedEvent struct {
inputLogEvent *cloudwatchlogs.InputLogEvent
insertOrder int
}
type byTimestamp []wrappedEvent
// init registers the awslogs driver
func init() {
if err := logger.RegisterLogDriver(name, New); err != nil {
logrus.Fatal(err)
}
if err := logger.RegisterLogOptValidator(name, ValidateLogOpt); err != nil {
logrus.Fatal(err)
}
}
// eventBatch holds the events that are batched for submission and the
// associated data about it.
//
// Warning: this type is not threadsafe and must not be used
// concurrently. This type is expected to be consumed in a single go
// routine and never concurrently.
type eventBatch struct {
batch []wrappedEvent
bytes int
}
// New creates an awslogs logger using the configuration passed in on the
// context. Supported context configuration variables are awslogs-region,
// awslogs-endpoint, awslogs-group, awslogs-stream, awslogs-create-group,
// awslogs-multiline-pattern and awslogs-datetime-format.
// When available, configuration is also taken from environment variables
// AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, the shared credentials
// file (~/.aws/credentials), and the EC2 Instance Metadata Service.
func New(info logger.Info) (logger.Logger, error) {
containerStreamConfig, err := newStreamConfig(info)
if err != nil {
return nil, err
}
client, err := newAWSLogsClient(info)
if err != nil {
return nil, err
}
containerStream := &logStream{
logStreamName: containerStreamConfig.logStreamName,
logGroupName: containerStreamConfig.logGroupName,
logCreateGroup: containerStreamConfig.logCreateGroup,
logNonBlocking: containerStreamConfig.logNonBlocking,
forceFlushInterval: containerStreamConfig.forceFlushInterval,
multilinePattern: containerStreamConfig.multilinePattern,
client: client,
messages: make(chan *logger.Message, containerStreamConfig.maxBufferedEvents),
}
creationDone := make(chan bool)
if containerStream.logNonBlocking {
go func() {
backoff := 1
maxBackoff := 32
for {
// If logger is closed we are done
containerStream.lock.RLock()
if containerStream.closed {
containerStream.lock.RUnlock()
break
}
containerStream.lock.RUnlock()
err := containerStream.create()
if err == nil {
break
}
time.Sleep(time.Duration(backoff) * time.Second)
if backoff < maxBackoff {
backoff *= 2
}
logrus.
WithError(err).
WithField("container-id", info.ContainerID).
WithField("container-name", info.ContainerName).
Error("Error while trying to initialize awslogs. Retrying in: ", backoff, " seconds")
}
close(creationDone)
}()
} else {
if err = containerStream.create(); err != nil {
return nil, err
}
close(creationDone)
}
go containerStream.collectBatch(creationDone)
return containerStream, nil
}
// Parses most of the awslogs- options and prepares a config object to be used for newing the actual stream
// It has been formed out to ease Utest of the New above
func newStreamConfig(info logger.Info) (*logStreamConfig, error) {
logGroupName := info.Config[logGroupKey]
logStreamName, err := loggerutils.ParseLogTag(info, "{{.FullID}}")
if err != nil {
return nil, err
}
logCreateGroup := false
if info.Config[logCreateGroupKey] != "" {
logCreateGroup, err = strconv.ParseBool(info.Config[logCreateGroupKey])
if err != nil {
return nil, err
}
}
logNonBlocking := info.Config["mode"] == "non-blocking"
forceFlushInterval := defaultForceFlushInterval
if info.Config[forceFlushIntervalKey] != "" {
forceFlushIntervalAsInt, err := strconv.Atoi(info.Config[forceFlushIntervalKey])
if err != nil {
return nil, err
}
forceFlushInterval = time.Duration(forceFlushIntervalAsInt) * time.Second
}
maxBufferedEvents := int(defaultMaxBufferedEvents)
if info.Config[maxBufferedEventsKey] != "" {
maxBufferedEvents, err = strconv.Atoi(info.Config[maxBufferedEventsKey])
if err != nil {
return nil, err
}
}
if info.Config[logStreamKey] != "" {
logStreamName = info.Config[logStreamKey]
}
multilinePattern, err := parseMultilineOptions(info)
if err != nil {
return nil, err
}
containerStreamConfig := &logStreamConfig{
logStreamName: logStreamName,
logGroupName: logGroupName,
logCreateGroup: logCreateGroup,
logNonBlocking: logNonBlocking,
forceFlushInterval: forceFlushInterval,
maxBufferedEvents: maxBufferedEvents,
multilinePattern: multilinePattern,
}
return containerStreamConfig, nil
}
// Parses awslogs-multiline-pattern and awslogs-datetime-format options
// If awslogs-datetime-format is present, convert the format from strftime
// to regexp and return.
// If awslogs-multiline-pattern is present, compile regexp and return
func parseMultilineOptions(info logger.Info) (*regexp.Regexp, error) {
dateTimeFormat := info.Config[datetimeFormatKey]
multilinePatternKey := info.Config[multilinePatternKey]
// strftime input is parsed into a regular expression
if dateTimeFormat != "" {
// %. matches each strftime format sequence and ReplaceAllStringFunc
// looks up each format sequence in the conversion table strftimeToRegex
// to replace with a defined regular expression
r := regexp.MustCompile("%.")
multilinePatternKey = r.ReplaceAllStringFunc(dateTimeFormat, func(s string) string {
return strftimeToRegex[s]
})
}
if multilinePatternKey != "" {
multilinePattern, err := regexp.Compile(multilinePatternKey)
if err != nil {
return nil, errors.Wrapf(err, "awslogs could not parse multiline pattern key %q", multilinePatternKey)
}
return multilinePattern, nil
}
return nil, nil
}
// Maps strftime format strings to regex
var strftimeToRegex = map[string]string{
/*weekdayShort */ `%a`: `(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)`,
/*weekdayFull */ `%A`: `(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)`,
/*weekdayZeroIndex */ `%w`: `[0-6]`,
/*dayZeroPadded */ `%d`: `(?:0[1-9]|[1,2][0-9]|3[0,1])`,
/*monthShort */ `%b`: `(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)`,
/*monthFull */ `%B`: `(?:January|February|March|April|May|June|July|August|September|October|November|December)`,
/*monthZeroPadded */ `%m`: `(?:0[1-9]|1[0-2])`,
/*yearCentury */ `%Y`: `\d{4}`,
/*yearZeroPadded */ `%y`: `\d{2}`,
/*hour24ZeroPadded */ `%H`: `(?:[0,1][0-9]|2[0-3])`,
/*hour12ZeroPadded */ `%I`: `(?:0[0-9]|1[0-2])`,
/*AM or PM */ `%p`: "[A,P]M",
/*minuteZeroPadded */ `%M`: `[0-5][0-9]`,
/*secondZeroPadded */ `%S`: `[0-5][0-9]`,
/*microsecondZeroPadded */ `%f`: `\d{6}`,
/*utcOffset */ `%z`: `[+-]\d{4}`,
/*tzName */ `%Z`: `[A-Z]{1,4}T`,
/*dayOfYearZeroPadded */ `%j`: `(?:0[0-9][1-9]|[1,2][0-9][0-9]|3[0-5][0-9]|36[0-6])`,
/*milliseconds */ `%L`: `\.\d{3}`,
}
// newRegionFinder is a variable such that the implementation
// can be swapped out for unit tests.
var newRegionFinder = func() (regionFinder, error) {
s, err := session.NewSession()
if err != nil {
return nil, err
}
return ec2metadata.New(s), nil
}
// newSDKEndpoint is a variable such that the implementation
// can be swapped out for unit tests.
var newSDKEndpoint = credentialsEndpoint
// newAWSLogsClient creates the service client for Amazon CloudWatch Logs.
// Customizations to the default client from the SDK include a Docker-specific
// User-Agent string and automatic region detection using the EC2 Instance
// Metadata Service when region is otherwise unspecified.
func newAWSLogsClient(info logger.Info) (api, error) {
var region, endpoint *string
if os.Getenv(regionEnvKey) != "" {
region = aws.String(os.Getenv(regionEnvKey))
}
if info.Config[regionKey] != "" {
region = aws.String(info.Config[regionKey])
}
if info.Config[endpointKey] != "" {
endpoint = aws.String(info.Config[endpointKey])
}
if region == nil || *region == "" {
logrus.Info("Trying to get region from EC2 Metadata")
ec2MetadataClient, err := newRegionFinder()
if err != nil {
logrus.WithError(err).Error("could not create EC2 metadata client")
return nil, errors.Wrap(err, "could not create EC2 metadata client")
}
r, err := ec2MetadataClient.Region()
if err != nil {
logrus.WithError(err).Error("Could not get region from EC2 metadata, environment, or log option")
return nil, errors.New("Cannot determine region for awslogs driver")
}
region = &r
}
sess, err := session.NewSession()
if err != nil {
return nil, errors.New("Failed to create a service client session for awslogs driver")
}
// attach region to cloudwatchlogs config
sess.Config.Region = region
// attach endpoint to cloudwatchlogs config
if endpoint != nil {
sess.Config.Endpoint = endpoint
}
if uri, ok := info.Config[credentialsEndpointKey]; ok {
logrus.Debugf("Trying to get credentials from awslogs-credentials-endpoint")
endpoint := fmt.Sprintf("%s%s", newSDKEndpoint, uri)
creds := endpointcreds.NewCredentialsClient(*sess.Config, sess.Handlers, endpoint,
func(p *endpointcreds.Provider) {
p.ExpiryWindow = 5 * time.Minute
})
// attach credentials to cloudwatchlogs config
sess.Config.Credentials = creds
}
logrus.WithFields(logrus.Fields{
"region": *region,
}).Debug("Created awslogs client")
client := cloudwatchlogs.New(sess)
client.Handlers.Build.PushBackNamed(request.NamedHandler{
Name: "DockerUserAgentHandler",
Fn: func(r *request.Request) {
currentAgent := r.HTTPRequest.Header.Get(userAgentHeader)
r.HTTPRequest.Header.Set(userAgentHeader,
fmt.Sprintf("Docker %s (%s) %s",
dockerversion.Version, runtime.GOOS, currentAgent))
},
})
return client, nil
}
// Name returns the name of the awslogs logging driver
func (l *logStream) Name() string {
return name
}
func (l *logStream) BufSize() int {
return maximumBytesPerEvent
}
// Log submits messages for logging by an instance of the awslogs logging driver
func (l *logStream) Log(msg *logger.Message) error {
l.lock.RLock()
defer l.lock.RUnlock()
if l.closed {
return errors.New("awslogs is closed")
}
if l.logNonBlocking {
select {
case l.messages <- msg:
return nil
default:
return errors.New("awslogs buffer is full")
}
}
l.messages <- msg
return nil
}
// Close closes the instance of the awslogs logging driver
func (l *logStream) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if !l.closed {
close(l.messages)
}
l.closed = true
return nil
}
// create creates log group and log stream for the instance of the awslogs logging driver
func (l *logStream) create() error {
err := l.createLogStream()
if err == nil {
return nil
}
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == resourceNotFoundCode && l.logCreateGroup {
if err := l.createLogGroup(); err != nil {
return errors.Wrap(err, "failed to create Cloudwatch log group")
}
err = l.createLogStream()
if err == nil {
return nil
}
}
return errors.Wrap(err, "failed to create Cloudwatch log stream")
}
// createLogGroup creates a log group for the instance of the awslogs logging driver
func (l *logStream) createLogGroup() error {
if _, err := l.client.CreateLogGroup(&cloudwatchlogs.CreateLogGroupInput{
LogGroupName: aws.String(l.logGroupName),
}); err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logCreateGroup": l.logCreateGroup,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log group already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log group")
}
return err
}
return nil
}
// createLogStream creates a log stream for the instance of the awslogs logging driver
func (l *logStream) createLogStream() error {
input := &cloudwatchlogs.CreateLogStreamInput{
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
_, err := l.client.CreateLogStream(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log stream already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log stream")
}
}
return err
}
// newTicker is used for time-based batching. newTicker is a variable such
// that the implementation can be swapped out for unit tests.
var newTicker = func(freq time.Duration) *time.Ticker {
return time.NewTicker(freq)
}
// collectBatch executes as a goroutine to perform batching of log events for
// submission to the log stream. If the awslogs-multiline-pattern or
// awslogs-datetime-format options have been configured, multiline processing
// is enabled, where log messages are stored in an event buffer until a multiline
// pattern match is found, at which point the messages in the event buffer are
// pushed to CloudWatch logs as a single log event. Multiline messages are processed
// according to the maximumBytesPerPut constraint, and the implementation only
// allows for messages to be buffered for a maximum of 2*batchPublishFrequency
// seconds. When events are ready to be processed for submission to CloudWatch
// Logs, the processEvents method is called. If a multiline pattern is not
// configured, log events are submitted to the processEvents method immediately.
func (l *logStream) collectBatch(created chan bool) {
// Wait for the logstream/group to be created
<-created
flushInterval := l.forceFlushInterval
if flushInterval <= 0 {
flushInterval = defaultForceFlushInterval
}
ticker := newTicker(flushInterval)
var eventBuffer []byte
var eventBufferTimestamp int64
var batch = newEventBatch()
for {
select {
case t := <-ticker.C:
// If event buffer is older than batch publish frequency flush the event buffer
if eventBufferTimestamp > 0 && len(eventBuffer) > 0 {
eventBufferAge := t.UnixNano()/int64(time.Millisecond) - eventBufferTimestamp
eventBufferExpired := eventBufferAge >= int64(flushInterval)/int64(time.Millisecond)
eventBufferNegative := eventBufferAge < 0
if eventBufferExpired || eventBufferNegative {
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBuffer = eventBuffer[:0]
}
}
l.publishBatch(batch)
batch.reset()
case msg, more := <-l.messages:
if !more {
// Flush event buffer and release resources
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
l.publishBatch(batch)
batch.reset()
return
}
if eventBufferTimestamp == 0 {
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
}
line := msg.Line
if l.multilinePattern != nil {
lineEffectiveLen := effectiveLen(string(line))
if l.multilinePattern.Match(line) || effectiveLen(string(eventBuffer))+lineEffectiveLen > maximumBytesPerEvent {
// This is a new log event or we will exceed max bytes per event
// so flush the current eventBuffer to events and reset timestamp
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
eventBuffer = eventBuffer[:0]
}
// Append newline if event is less than max event size
if lineEffectiveLen < maximumBytesPerEvent {
line = append(line, "\n"...)
}
eventBuffer = append(eventBuffer, line...)
logger.PutMessage(msg)
} else {
l.processEvent(batch, line, msg.Timestamp.UnixNano()/int64(time.Millisecond))
logger.PutMessage(msg)
}
}
}
}
// processEvent processes log events that are ready for submission to CloudWatch
// logs. Batching is performed on time- and size-bases. Time-based batching
// occurs at a 5 second interval (defined in the batchPublishFrequency const).
// Size-based batching is performed on the maximum number of events per batch
// (defined in maximumLogEventsPerPut) and the maximum number of total bytes in a
// batch (defined in maximumBytesPerPut). Log messages are split by the maximum
// bytes per event (defined in maximumBytesPerEvent). There is a fixed per-event
// byte overhead (defined in perEventBytes) which is accounted for in split- and
// batch-calculations. Because the events are interpreted as UTF-8 encoded
// Unicode, invalid UTF-8 byte sequences are replaced with the Unicode
// replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To
// compensate for that and to avoid splitting valid UTF-8 characters into
// invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
func (l *logStream) processEvent(batch *eventBatch, bytes []byte, timestamp int64) {
for len(bytes) > 0 {
// Split line length so it does not exceed the maximum
splitOffset, lineBytes := findValidSplit(string(bytes), maximumBytesPerEvent)
line := bytes[:splitOffset]
event := wrappedEvent{
inputLogEvent: &cloudwatchlogs.InputLogEvent{
Message: aws.String(string(line)),
Timestamp: aws.Int64(timestamp),
},
insertOrder: batch.count(),
}
added := batch.add(event, lineBytes)
if added {
bytes = bytes[splitOffset:]
} else {
l.publishBatch(batch)
batch.reset()
}
}
}
// effectiveLen counts the effective number of bytes in the string, after
// UTF-8 normalization. UTF-8 normalization includes replacing bytes that do
// not constitute valid UTF-8 encoded Unicode codepoints with the Unicode
// replacement codepoint U+FFFD (a 3-byte UTF-8 sequence, represented in Go as
// utf8.RuneError)
func effectiveLen(line string) int {
effectiveBytes := 0
for _, rune := range line {
effectiveBytes += utf8.RuneLen(rune)
}
return effectiveBytes
}
// findValidSplit finds the byte offset to split a string without breaking valid
// Unicode codepoints given a maximum number of total bytes. findValidSplit
// returns the byte offset for splitting a string or []byte, as well as the
// effective number of bytes if the string were normalized to replace invalid
// UTF-8 encoded bytes with the Unicode replacement character (a 3-byte UTF-8
// sequence, represented in Go as utf8.RuneError)
func findValidSplit(line string, maxBytes int) (splitOffset, effectiveBytes int) {
for offset, rune := range line {
splitOffset = offset
if effectiveBytes+utf8.RuneLen(rune) > maxBytes {
return splitOffset, effectiveBytes
}
effectiveBytes += utf8.RuneLen(rune)
}
splitOffset = len(line)
return
}
// publishBatch calls PutLogEvents for a given set of InputLogEvents,
// accounting for sequencing requirements (each request must reference the
// sequence token returned by the previous request).
func (l *logStream) publishBatch(batch *eventBatch) {
if batch.isEmpty() {
return
}
cwEvents := unwrapEvents(batch.events())
nextSequenceToken, err := l.putLogEvents(cwEvents, l.sequenceToken)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == dataAlreadyAcceptedCode {
// already submitted, just grab the correct sequence token
parts := strings.Split(awsErr.Message(), " ")
nextSequenceToken = &parts[len(parts)-1]
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Info("Data already accepted, ignoring error")
err = nil
} else if awsErr.Code() == invalidSequenceTokenCode {
// sequence code is bad, grab the correct one and retry
parts := strings.Split(awsErr.Message(), " ")
token := parts[len(parts)-1]
nextSequenceToken, err = l.putLogEvents(cwEvents, &token)
}
}
}
if err != nil {
logrus.Error(err)
} else {
l.sequenceToken = nextSequenceToken
}
}
// putLogEvents wraps the PutLogEvents API
func (l *logStream) putLogEvents(events []*cloudwatchlogs.InputLogEvent, sequenceToken *string) (*string, error) {
input := &cloudwatchlogs.PutLogEventsInput{
LogEvents: events,
SequenceToken: sequenceToken,
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
resp, err := l.client.PutLogEvents(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Error("Failed to put log events")
}
return nil, err
}
return resp.NextSequenceToken, nil
}
// ValidateLogOpt looks for awslogs-specific log options awslogs-region, awslogs-endpoint
// awslogs-group, awslogs-stream, awslogs-create-group, awslogs-datetime-format,
// awslogs-multiline-pattern
func ValidateLogOpt(cfg map[string]string) error {
for key := range cfg {
switch key {
case logGroupKey:
case logStreamKey:
case logCreateGroupKey:
case regionKey:
case endpointKey:
case tagKey:
case datetimeFormatKey:
case multilinePatternKey:
case credentialsEndpointKey:
case forceFlushIntervalKey:
case maxBufferedEventsKey:
default:
return fmt.Errorf("unknown log opt '%s' for %s log driver", key, name)
}
}
if cfg[logGroupKey] == "" {
return fmt.Errorf("must specify a value for log opt '%s'", logGroupKey)
}
if cfg[logCreateGroupKey] != "" {
if _, err := strconv.ParseBool(cfg[logCreateGroupKey]); err != nil {
return fmt.Errorf("must specify valid value for log opt '%s': %v", logCreateGroupKey, err)
}
}
if cfg[forceFlushIntervalKey] != "" {
if value, err := strconv.Atoi(cfg[forceFlushIntervalKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", forceFlushIntervalKey, cfg[forceFlushIntervalKey])
}
}
if cfg[maxBufferedEventsKey] != "" {
if value, err := strconv.Atoi(cfg[maxBufferedEventsKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", maxBufferedEventsKey, cfg[maxBufferedEventsKey])
}
}
_, datetimeFormatKeyExists := cfg[datetimeFormatKey]
_, multilinePatternKeyExists := cfg[multilinePatternKey]
if datetimeFormatKeyExists && multilinePatternKeyExists {
return fmt.Errorf("you cannot configure log opt '%s' and '%s' at the same time", datetimeFormatKey, multilinePatternKey)
}
return nil
}
// Len returns the length of a byTimestamp slice. Len is required by the
// sort.Interface interface.
func (slice byTimestamp) Len() int {
return len(slice)
}
// Less compares two values in a byTimestamp slice by Timestamp. Less is
// required by the sort.Interface interface.
func (slice byTimestamp) Less(i, j int) bool {
iTimestamp, jTimestamp := int64(0), int64(0)
if slice != nil && slice[i].inputLogEvent.Timestamp != nil {
iTimestamp = *slice[i].inputLogEvent.Timestamp
}
if slice != nil && slice[j].inputLogEvent.Timestamp != nil {
jTimestamp = *slice[j].inputLogEvent.Timestamp
}
if iTimestamp == jTimestamp {
return slice[i].insertOrder < slice[j].insertOrder
}
return iTimestamp < jTimestamp
}
// Swap swaps two values in a byTimestamp slice with each other. Swap is
// required by the sort.Interface interface.
func (slice byTimestamp) Swap(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
func unwrapEvents(events []wrappedEvent) []*cloudwatchlogs.InputLogEvent {
cwEvents := make([]*cloudwatchlogs.InputLogEvent, len(events))
for i, input := range events {
cwEvents[i] = input.inputLogEvent
}
return cwEvents
}
func newEventBatch() *eventBatch {
return &eventBatch{
batch: make([]wrappedEvent, 0),
bytes: 0,
}
}
// events returns a slice of wrappedEvents sorted in order of their
// timestamps and then by their insertion order (see `byTimestamp`).
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) events() []wrappedEvent {
sort.Sort(byTimestamp(b.batch))
return b.batch
}
// add adds an event to the batch of events accounting for the
// necessary overhead for an event to be logged. An error will be
// returned if the event cannot be added to the batch due to service
// limits.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) add(event wrappedEvent, size int) bool {
addBytes := size + perEventBytes
// verify we are still within service limits
switch {
case len(b.batch)+1 > maximumLogEventsPerPut:
return false
case b.bytes+addBytes > maximumBytesPerPut:
return false
}
b.bytes += addBytes
b.batch = append(b.batch, event)
return true
}
// count is the number of batched events. Warning: this method
// is not threadsafe and must not be used concurrently.
func (b *eventBatch) count() int {
return len(b.batch)
}
// size is the total number of bytes that the batch represents.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) size() int {
return b.bytes
}
func (b *eventBatch) isEmpty() bool {
zeroEvents := b.count() == 0
zeroSize := b.size() == 0
return zeroEvents && zeroSize
}
// reset prepares the batch for reuse.
func (b *eventBatch) reset() {
b.bytes = 0
b.batch = b.batch[:0]
}
| // Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
package awslogs // import "github.com/docker/docker/daemon/logger/awslogs"
import (
"fmt"
"os"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
"unicode/utf8"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials/endpointcreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/logger/loggerutils"
"github.com/docker/docker/dockerversion"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
name = "awslogs"
regionKey = "awslogs-region"
endpointKey = "awslogs-endpoint"
regionEnvKey = "AWS_REGION"
logGroupKey = "awslogs-group"
logStreamKey = "awslogs-stream"
logCreateGroupKey = "awslogs-create-group"
tagKey = "tag"
datetimeFormatKey = "awslogs-datetime-format"
multilinePatternKey = "awslogs-multiline-pattern"
credentialsEndpointKey = "awslogs-credentials-endpoint"
forceFlushIntervalKey = "awslogs-force-flush-interval-seconds"
maxBufferedEventsKey = "awslogs-max-buffered-events"
defaultForceFlushInterval = 5 * time.Second
defaultMaxBufferedEvents = 4096
// See: http://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html
perEventBytes = 26
maximumBytesPerPut = 1048576
maximumLogEventsPerPut = 10000
// See: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_limits.html
// Because the events are interpreted as UTF-8 encoded Unicode, invalid UTF-8 byte sequences are replaced with the
// Unicode replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To compensate for that and to avoid
// splitting valid UTF-8 characters into invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
maximumBytesPerEvent = 262144 - perEventBytes
resourceAlreadyExistsCode = "ResourceAlreadyExistsException"
dataAlreadyAcceptedCode = "DataAlreadyAcceptedException"
invalidSequenceTokenCode = "InvalidSequenceTokenException"
resourceNotFoundCode = "ResourceNotFoundException"
credentialsEndpoint = "http://169.254.170.2"
userAgentHeader = "User-Agent"
)
type logStream struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
multilinePattern *regexp.Regexp
client api
messages chan *logger.Message
lock sync.RWMutex
closed bool
sequenceToken *string
}
type logStreamConfig struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
maxBufferedEvents int
multilinePattern *regexp.Regexp
}
var _ logger.SizedLogger = &logStream{}
type api interface {
CreateLogGroup(*cloudwatchlogs.CreateLogGroupInput) (*cloudwatchlogs.CreateLogGroupOutput, error)
CreateLogStream(*cloudwatchlogs.CreateLogStreamInput) (*cloudwatchlogs.CreateLogStreamOutput, error)
PutLogEvents(*cloudwatchlogs.PutLogEventsInput) (*cloudwatchlogs.PutLogEventsOutput, error)
}
type regionFinder interface {
Region() (string, error)
}
type wrappedEvent struct {
inputLogEvent *cloudwatchlogs.InputLogEvent
insertOrder int
}
type byTimestamp []wrappedEvent
// init registers the awslogs driver
func init() {
if err := logger.RegisterLogDriver(name, New); err != nil {
logrus.Fatal(err)
}
if err := logger.RegisterLogOptValidator(name, ValidateLogOpt); err != nil {
logrus.Fatal(err)
}
}
// eventBatch holds the events that are batched for submission and the
// associated data about it.
//
// Warning: this type is not threadsafe and must not be used
// concurrently. This type is expected to be consumed in a single go
// routine and never concurrently.
type eventBatch struct {
batch []wrappedEvent
bytes int
}
// New creates an awslogs logger using the configuration passed in on the
// context. Supported context configuration variables are awslogs-region,
// awslogs-endpoint, awslogs-group, awslogs-stream, awslogs-create-group,
// awslogs-multiline-pattern and awslogs-datetime-format.
// When available, configuration is also taken from environment variables
// AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, the shared credentials
// file (~/.aws/credentials), and the EC2 Instance Metadata Service.
func New(info logger.Info) (logger.Logger, error) {
containerStreamConfig, err := newStreamConfig(info)
if err != nil {
return nil, err
}
client, err := newAWSLogsClient(info)
if err != nil {
return nil, err
}
containerStream := &logStream{
logStreamName: containerStreamConfig.logStreamName,
logGroupName: containerStreamConfig.logGroupName,
logCreateGroup: containerStreamConfig.logCreateGroup,
logNonBlocking: containerStreamConfig.logNonBlocking,
forceFlushInterval: containerStreamConfig.forceFlushInterval,
multilinePattern: containerStreamConfig.multilinePattern,
client: client,
messages: make(chan *logger.Message, containerStreamConfig.maxBufferedEvents),
}
creationDone := make(chan bool)
if containerStream.logNonBlocking {
go func() {
backoff := 1
maxBackoff := 32
for {
// If logger is closed we are done
containerStream.lock.RLock()
if containerStream.closed {
containerStream.lock.RUnlock()
break
}
containerStream.lock.RUnlock()
err := containerStream.create()
if err == nil {
break
}
time.Sleep(time.Duration(backoff) * time.Second)
if backoff < maxBackoff {
backoff *= 2
}
logrus.
WithError(err).
WithField("container-id", info.ContainerID).
WithField("container-name", info.ContainerName).
Error("Error while trying to initialize awslogs. Retrying in: ", backoff, " seconds")
}
close(creationDone)
}()
} else {
if err = containerStream.create(); err != nil {
return nil, err
}
close(creationDone)
}
go containerStream.collectBatch(creationDone)
return containerStream, nil
}
// Parses most of the awslogs- options and prepares a config object to be used for newing the actual stream
// It has been formed out to ease Utest of the New above
func newStreamConfig(info logger.Info) (*logStreamConfig, error) {
logGroupName := info.Config[logGroupKey]
logStreamName, err := loggerutils.ParseLogTag(info, "{{.FullID}}")
if err != nil {
return nil, err
}
logCreateGroup := false
if info.Config[logCreateGroupKey] != "" {
logCreateGroup, err = strconv.ParseBool(info.Config[logCreateGroupKey])
if err != nil {
return nil, err
}
}
logNonBlocking := info.Config["mode"] == "non-blocking"
forceFlushInterval := defaultForceFlushInterval
if info.Config[forceFlushIntervalKey] != "" {
forceFlushIntervalAsInt, err := strconv.Atoi(info.Config[forceFlushIntervalKey])
if err != nil {
return nil, err
}
forceFlushInterval = time.Duration(forceFlushIntervalAsInt) * time.Second
}
maxBufferedEvents := int(defaultMaxBufferedEvents)
if info.Config[maxBufferedEventsKey] != "" {
maxBufferedEvents, err = strconv.Atoi(info.Config[maxBufferedEventsKey])
if err != nil {
return nil, err
}
}
if info.Config[logStreamKey] != "" {
logStreamName = info.Config[logStreamKey]
}
multilinePattern, err := parseMultilineOptions(info)
if err != nil {
return nil, err
}
containerStreamConfig := &logStreamConfig{
logStreamName: logStreamName,
logGroupName: logGroupName,
logCreateGroup: logCreateGroup,
logNonBlocking: logNonBlocking,
forceFlushInterval: forceFlushInterval,
maxBufferedEvents: maxBufferedEvents,
multilinePattern: multilinePattern,
}
return containerStreamConfig, nil
}
// Parses awslogs-multiline-pattern and awslogs-datetime-format options
// If awslogs-datetime-format is present, convert the format from strftime
// to regexp and return.
// If awslogs-multiline-pattern is present, compile regexp and return
func parseMultilineOptions(info logger.Info) (*regexp.Regexp, error) {
dateTimeFormat := info.Config[datetimeFormatKey]
multilinePatternKey := info.Config[multilinePatternKey]
// strftime input is parsed into a regular expression
if dateTimeFormat != "" {
// %. matches each strftime format sequence and ReplaceAllStringFunc
// looks up each format sequence in the conversion table strftimeToRegex
// to replace with a defined regular expression
r := regexp.MustCompile("%.")
multilinePatternKey = r.ReplaceAllStringFunc(dateTimeFormat, func(s string) string {
return strftimeToRegex[s]
})
}
if multilinePatternKey != "" {
multilinePattern, err := regexp.Compile(multilinePatternKey)
if err != nil {
return nil, errors.Wrapf(err, "awslogs could not parse multiline pattern key %q", multilinePatternKey)
}
return multilinePattern, nil
}
return nil, nil
}
// Maps strftime format strings to regex
var strftimeToRegex = map[string]string{
/*weekdayShort */ `%a`: `(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)`,
/*weekdayFull */ `%A`: `(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)`,
/*weekdayZeroIndex */ `%w`: `[0-6]`,
/*dayZeroPadded */ `%d`: `(?:0[1-9]|[1,2][0-9]|3[0,1])`,
/*monthShort */ `%b`: `(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)`,
/*monthFull */ `%B`: `(?:January|February|March|April|May|June|July|August|September|October|November|December)`,
/*monthZeroPadded */ `%m`: `(?:0[1-9]|1[0-2])`,
/*yearCentury */ `%Y`: `\d{4}`,
/*yearZeroPadded */ `%y`: `\d{2}`,
/*hour24ZeroPadded */ `%H`: `(?:[0,1][0-9]|2[0-3])`,
/*hour12ZeroPadded */ `%I`: `(?:0[0-9]|1[0-2])`,
/*AM or PM */ `%p`: "[A,P]M",
/*minuteZeroPadded */ `%M`: `[0-5][0-9]`,
/*secondZeroPadded */ `%S`: `[0-5][0-9]`,
/*microsecondZeroPadded */ `%f`: `\d{6}`,
/*utcOffset */ `%z`: `[+-]\d{4}`,
/*tzName */ `%Z`: `[A-Z]{1,4}T`,
/*dayOfYearZeroPadded */ `%j`: `(?:0[0-9][1-9]|[1,2][0-9][0-9]|3[0-5][0-9]|36[0-6])`,
/*milliseconds */ `%L`: `\.\d{3}`,
}
// newRegionFinder is a variable such that the implementation
// can be swapped out for unit tests.
var newRegionFinder = func() (regionFinder, error) {
s, err := session.NewSession()
if err != nil {
return nil, err
}
return ec2metadata.New(s), nil
}
// newSDKEndpoint is a variable such that the implementation
// can be swapped out for unit tests.
var newSDKEndpoint = credentialsEndpoint
// newAWSLogsClient creates the service client for Amazon CloudWatch Logs.
// Customizations to the default client from the SDK include a Docker-specific
// User-Agent string and automatic region detection using the EC2 Instance
// Metadata Service when region is otherwise unspecified.
func newAWSLogsClient(info logger.Info) (api, error) {
var region, endpoint *string
if os.Getenv(regionEnvKey) != "" {
region = aws.String(os.Getenv(regionEnvKey))
}
if info.Config[regionKey] != "" {
region = aws.String(info.Config[regionKey])
}
if info.Config[endpointKey] != "" {
endpoint = aws.String(info.Config[endpointKey])
}
if region == nil || *region == "" {
logrus.Info("Trying to get region from EC2 Metadata")
ec2MetadataClient, err := newRegionFinder()
if err != nil {
logrus.WithError(err).Error("could not create EC2 metadata client")
return nil, errors.Wrap(err, "could not create EC2 metadata client")
}
r, err := ec2MetadataClient.Region()
if err != nil {
logrus.WithError(err).Error("Could not get region from EC2 metadata, environment, or log option")
return nil, errors.New("Cannot determine region for awslogs driver")
}
region = &r
}
sess, err := session.NewSession()
if err != nil {
return nil, errors.New("Failed to create a service client session for awslogs driver")
}
// attach region to cloudwatchlogs config
sess.Config.Region = region
// attach endpoint to cloudwatchlogs config
if endpoint != nil {
sess.Config.Endpoint = endpoint
}
if uri, ok := info.Config[credentialsEndpointKey]; ok {
logrus.Debugf("Trying to get credentials from awslogs-credentials-endpoint")
endpoint := fmt.Sprintf("%s%s", newSDKEndpoint, uri)
creds := endpointcreds.NewCredentialsClient(*sess.Config, sess.Handlers, endpoint,
func(p *endpointcreds.Provider) {
p.ExpiryWindow = 5 * time.Minute
})
// attach credentials to cloudwatchlogs config
sess.Config.Credentials = creds
}
logrus.WithFields(logrus.Fields{
"region": *region,
}).Debug("Created awslogs client")
client := cloudwatchlogs.New(sess)
client.Handlers.Build.PushBackNamed(request.NamedHandler{
Name: "DockerUserAgentHandler",
Fn: func(r *request.Request) {
currentAgent := r.HTTPRequest.Header.Get(userAgentHeader)
r.HTTPRequest.Header.Set(userAgentHeader,
fmt.Sprintf("Docker %s (%s) %s",
dockerversion.Version, runtime.GOOS, currentAgent))
},
})
return client, nil
}
// Name returns the name of the awslogs logging driver
func (l *logStream) Name() string {
return name
}
// BufSize returns the maximum bytes CloudWatch can handle.
func (l *logStream) BufSize() int {
return maximumBytesPerEvent
}
// Log submits messages for logging by an instance of the awslogs logging driver
func (l *logStream) Log(msg *logger.Message) error {
l.lock.RLock()
defer l.lock.RUnlock()
if l.closed {
return errors.New("awslogs is closed")
}
if l.logNonBlocking {
select {
case l.messages <- msg:
return nil
default:
return errors.New("awslogs buffer is full")
}
}
l.messages <- msg
return nil
}
// Close closes the instance of the awslogs logging driver
func (l *logStream) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if !l.closed {
close(l.messages)
}
l.closed = true
return nil
}
// create creates log group and log stream for the instance of the awslogs logging driver
func (l *logStream) create() error {
err := l.createLogStream()
if err == nil {
return nil
}
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == resourceNotFoundCode && l.logCreateGroup {
if err := l.createLogGroup(); err != nil {
return errors.Wrap(err, "failed to create Cloudwatch log group")
}
err = l.createLogStream()
if err == nil {
return nil
}
}
return errors.Wrap(err, "failed to create Cloudwatch log stream")
}
// createLogGroup creates a log group for the instance of the awslogs logging driver
func (l *logStream) createLogGroup() error {
if _, err := l.client.CreateLogGroup(&cloudwatchlogs.CreateLogGroupInput{
LogGroupName: aws.String(l.logGroupName),
}); err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logCreateGroup": l.logCreateGroup,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log group already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log group")
}
return err
}
return nil
}
// createLogStream creates a log stream for the instance of the awslogs logging driver
func (l *logStream) createLogStream() error {
input := &cloudwatchlogs.CreateLogStreamInput{
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
_, err := l.client.CreateLogStream(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log stream already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log stream")
}
}
return err
}
// newTicker is used for time-based batching. newTicker is a variable such
// that the implementation can be swapped out for unit tests.
var newTicker = func(freq time.Duration) *time.Ticker {
return time.NewTicker(freq)
}
// collectBatch executes as a goroutine to perform batching of log events for
// submission to the log stream. If the awslogs-multiline-pattern or
// awslogs-datetime-format options have been configured, multiline processing
// is enabled, where log messages are stored in an event buffer until a multiline
// pattern match is found, at which point the messages in the event buffer are
// pushed to CloudWatch logs as a single log event. Multiline messages are processed
// according to the maximumBytesPerPut constraint, and the implementation only
// allows for messages to be buffered for a maximum of 2*batchPublishFrequency
// seconds. When events are ready to be processed for submission to CloudWatch
// Logs, the processEvents method is called. If a multiline pattern is not
// configured, log events are submitted to the processEvents method immediately.
func (l *logStream) collectBatch(created chan bool) {
// Wait for the logstream/group to be created
<-created
flushInterval := l.forceFlushInterval
if flushInterval <= 0 {
flushInterval = defaultForceFlushInterval
}
ticker := newTicker(flushInterval)
var eventBuffer []byte
var eventBufferTimestamp int64
var batch = newEventBatch()
for {
select {
case t := <-ticker.C:
// If event buffer is older than batch publish frequency flush the event buffer
if eventBufferTimestamp > 0 && len(eventBuffer) > 0 {
eventBufferAge := t.UnixNano()/int64(time.Millisecond) - eventBufferTimestamp
eventBufferExpired := eventBufferAge >= int64(flushInterval)/int64(time.Millisecond)
eventBufferNegative := eventBufferAge < 0
if eventBufferExpired || eventBufferNegative {
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBuffer = eventBuffer[:0]
}
}
l.publishBatch(batch)
batch.reset()
case msg, more := <-l.messages:
if !more {
// Flush event buffer and release resources
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
l.publishBatch(batch)
batch.reset()
return
}
if eventBufferTimestamp == 0 {
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
}
line := msg.Line
if l.multilinePattern != nil {
lineEffectiveLen := effectiveLen(string(line))
if l.multilinePattern.Match(line) || effectiveLen(string(eventBuffer))+lineEffectiveLen > maximumBytesPerEvent {
// This is a new log event or we will exceed max bytes per event
// so flush the current eventBuffer to events and reset timestamp
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
eventBuffer = eventBuffer[:0]
}
// Append newline if event is less than max event size
if lineEffectiveLen < maximumBytesPerEvent {
line = append(line, "\n"...)
}
eventBuffer = append(eventBuffer, line...)
logger.PutMessage(msg)
} else {
l.processEvent(batch, line, msg.Timestamp.UnixNano()/int64(time.Millisecond))
logger.PutMessage(msg)
}
}
}
}
// processEvent processes log events that are ready for submission to CloudWatch
// logs. Batching is performed on time- and size-bases. Time-based batching
// occurs at a 5 second interval (defined in the batchPublishFrequency const).
// Size-based batching is performed on the maximum number of events per batch
// (defined in maximumLogEventsPerPut) and the maximum number of total bytes in a
// batch (defined in maximumBytesPerPut). Log messages are split by the maximum
// bytes per event (defined in maximumBytesPerEvent). There is a fixed per-event
// byte overhead (defined in perEventBytes) which is accounted for in split- and
// batch-calculations. Because the events are interpreted as UTF-8 encoded
// Unicode, invalid UTF-8 byte sequences are replaced with the Unicode
// replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To
// compensate for that and to avoid splitting valid UTF-8 characters into
// invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
func (l *logStream) processEvent(batch *eventBatch, bytes []byte, timestamp int64) {
for len(bytes) > 0 {
// Split line length so it does not exceed the maximum
splitOffset, lineBytes := findValidSplit(string(bytes), maximumBytesPerEvent)
line := bytes[:splitOffset]
event := wrappedEvent{
inputLogEvent: &cloudwatchlogs.InputLogEvent{
Message: aws.String(string(line)),
Timestamp: aws.Int64(timestamp),
},
insertOrder: batch.count(),
}
added := batch.add(event, lineBytes)
if added {
bytes = bytes[splitOffset:]
} else {
l.publishBatch(batch)
batch.reset()
}
}
}
// effectiveLen counts the effective number of bytes in the string, after
// UTF-8 normalization. UTF-8 normalization includes replacing bytes that do
// not constitute valid UTF-8 encoded Unicode codepoints with the Unicode
// replacement codepoint U+FFFD (a 3-byte UTF-8 sequence, represented in Go as
// utf8.RuneError)
func effectiveLen(line string) int {
effectiveBytes := 0
for _, rune := range line {
effectiveBytes += utf8.RuneLen(rune)
}
return effectiveBytes
}
// findValidSplit finds the byte offset to split a string without breaking valid
// Unicode codepoints given a maximum number of total bytes. findValidSplit
// returns the byte offset for splitting a string or []byte, as well as the
// effective number of bytes if the string were normalized to replace invalid
// UTF-8 encoded bytes with the Unicode replacement character (a 3-byte UTF-8
// sequence, represented in Go as utf8.RuneError)
func findValidSplit(line string, maxBytes int) (splitOffset, effectiveBytes int) {
for offset, rune := range line {
splitOffset = offset
if effectiveBytes+utf8.RuneLen(rune) > maxBytes {
return splitOffset, effectiveBytes
}
effectiveBytes += utf8.RuneLen(rune)
}
splitOffset = len(line)
return
}
// publishBatch calls PutLogEvents for a given set of InputLogEvents,
// accounting for sequencing requirements (each request must reference the
// sequence token returned by the previous request).
func (l *logStream) publishBatch(batch *eventBatch) {
if batch.isEmpty() {
return
}
cwEvents := unwrapEvents(batch.events())
nextSequenceToken, err := l.putLogEvents(cwEvents, l.sequenceToken)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == dataAlreadyAcceptedCode {
// already submitted, just grab the correct sequence token
parts := strings.Split(awsErr.Message(), " ")
nextSequenceToken = &parts[len(parts)-1]
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Info("Data already accepted, ignoring error")
err = nil
} else if awsErr.Code() == invalidSequenceTokenCode {
// sequence code is bad, grab the correct one and retry
parts := strings.Split(awsErr.Message(), " ")
token := parts[len(parts)-1]
nextSequenceToken, err = l.putLogEvents(cwEvents, &token)
}
}
}
if err != nil {
logrus.Error(err)
} else {
l.sequenceToken = nextSequenceToken
}
}
// putLogEvents wraps the PutLogEvents API
func (l *logStream) putLogEvents(events []*cloudwatchlogs.InputLogEvent, sequenceToken *string) (*string, error) {
input := &cloudwatchlogs.PutLogEventsInput{
LogEvents: events,
SequenceToken: sequenceToken,
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
resp, err := l.client.PutLogEvents(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Error("Failed to put log events")
}
return nil, err
}
return resp.NextSequenceToken, nil
}
// ValidateLogOpt looks for awslogs-specific log options awslogs-region, awslogs-endpoint
// awslogs-group, awslogs-stream, awslogs-create-group, awslogs-datetime-format,
// awslogs-multiline-pattern
func ValidateLogOpt(cfg map[string]string) error {
for key := range cfg {
switch key {
case logGroupKey:
case logStreamKey:
case logCreateGroupKey:
case regionKey:
case endpointKey:
case tagKey:
case datetimeFormatKey:
case multilinePatternKey:
case credentialsEndpointKey:
case forceFlushIntervalKey:
case maxBufferedEventsKey:
default:
return fmt.Errorf("unknown log opt '%s' for %s log driver", key, name)
}
}
if cfg[logGroupKey] == "" {
return fmt.Errorf("must specify a value for log opt '%s'", logGroupKey)
}
if cfg[logCreateGroupKey] != "" {
if _, err := strconv.ParseBool(cfg[logCreateGroupKey]); err != nil {
return fmt.Errorf("must specify valid value for log opt '%s': %v", logCreateGroupKey, err)
}
}
if cfg[forceFlushIntervalKey] != "" {
if value, err := strconv.Atoi(cfg[forceFlushIntervalKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", forceFlushIntervalKey, cfg[forceFlushIntervalKey])
}
}
if cfg[maxBufferedEventsKey] != "" {
if value, err := strconv.Atoi(cfg[maxBufferedEventsKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", maxBufferedEventsKey, cfg[maxBufferedEventsKey])
}
}
_, datetimeFormatKeyExists := cfg[datetimeFormatKey]
_, multilinePatternKeyExists := cfg[multilinePatternKey]
if datetimeFormatKeyExists && multilinePatternKeyExists {
return fmt.Errorf("you cannot configure log opt '%s' and '%s' at the same time", datetimeFormatKey, multilinePatternKey)
}
return nil
}
// Len returns the length of a byTimestamp slice. Len is required by the
// sort.Interface interface.
func (slice byTimestamp) Len() int {
return len(slice)
}
// Less compares two values in a byTimestamp slice by Timestamp. Less is
// required by the sort.Interface interface.
func (slice byTimestamp) Less(i, j int) bool {
iTimestamp, jTimestamp := int64(0), int64(0)
if slice != nil && slice[i].inputLogEvent.Timestamp != nil {
iTimestamp = *slice[i].inputLogEvent.Timestamp
}
if slice != nil && slice[j].inputLogEvent.Timestamp != nil {
jTimestamp = *slice[j].inputLogEvent.Timestamp
}
if iTimestamp == jTimestamp {
return slice[i].insertOrder < slice[j].insertOrder
}
return iTimestamp < jTimestamp
}
// Swap swaps two values in a byTimestamp slice with each other. Swap is
// required by the sort.Interface interface.
func (slice byTimestamp) Swap(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
func unwrapEvents(events []wrappedEvent) []*cloudwatchlogs.InputLogEvent {
cwEvents := make([]*cloudwatchlogs.InputLogEvent, len(events))
for i, input := range events {
cwEvents[i] = input.inputLogEvent
}
return cwEvents
}
func newEventBatch() *eventBatch {
return &eventBatch{
batch: make([]wrappedEvent, 0),
bytes: 0,
}
}
// events returns a slice of wrappedEvents sorted in order of their
// timestamps and then by their insertion order (see `byTimestamp`).
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) events() []wrappedEvent {
sort.Sort(byTimestamp(b.batch))
return b.batch
}
// add adds an event to the batch of events accounting for the
// necessary overhead for an event to be logged. An error will be
// returned if the event cannot be added to the batch due to service
// limits.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) add(event wrappedEvent, size int) bool {
addBytes := size + perEventBytes
// verify we are still within service limits
switch {
case len(b.batch)+1 > maximumLogEventsPerPut:
return false
case b.bytes+addBytes > maximumBytesPerPut:
return false
}
b.bytes += addBytes
b.batch = append(b.batch, event)
return true
}
// count is the number of batched events. Warning: this method
// is not threadsafe and must not be used concurrently.
func (b *eventBatch) count() int {
return len(b.batch)
}
// size is the total number of bytes that the batch represents.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) size() int {
return b.bytes
}
func (b *eventBatch) isEmpty() bool {
zeroEvents := b.count() == 0
zeroSize := b.size() == 0
return zeroEvents && zeroSize
}
// reset prepares the batch for reuse.
func (b *eventBatch) reset() {
b.bytes = 0
b.batch = b.batch[:0]
}
| kzys | 0456e058d2b60606d4374cd975c635dfe7673f17 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | Interesting that the linter didn't fail before this PR 🤔 | thaJeztah | 5,042 |
moby/moby | 41,909 | Handle long log messages correctly on SizedLogger | Loggers that implement BufSize() (e.g. awslogs) uses the method to
tell Copier about the maximum log line length. However loggerWithCache
and RingBuffer hide the method by wrapping loggers.
As a result, Copier uses its default 16KB limit which breaks log
lines > 16kB even the destinations can handle that.
This change implements BufSize() on loggerWithCache and RingBuffer to
make sure these logger wrappes don't hide the method on the underlying
loggers.
Fixes #41794.
Signed-off-by: Kazuyoshi Kato <[email protected]>
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
I've added BufSize() to loggerWithCache and RingLogger to make Copier aware about the size limit of the underlying loggers.
**- How I did it**
I've added the method to the structs.
**- How to verify it**
I built Docker and tested the change with `log-split` container image I made.
```
docker run -d --log-driver=awslogs --log-opt mode=non-blocking --log-opt awslogs-group="log-split-test" --log-opt awslogs-region=us-west-2 log-split:latest
```
The Dockerfile for the image is below.
```
FROM ubuntu:18.04
CMD tr -dc A-Za-z0-9 </dev/urandom | head -c 17000; echo ''
```
I also added new unit tests on Copier.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix loggers to make sure they don't break long lines when the destinations' limits allow.
**- A picture of a cute animal (not mandatory but encouraged)**
(From https://www.zoo.org/animals/digital)
| null | 2021-01-20 23:13:00+00:00 | 2021-01-21 13:16:47+00:00 | daemon/logger/awslogs/cloudwatchlogs.go | // Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
package awslogs // import "github.com/docker/docker/daemon/logger/awslogs"
import (
"fmt"
"os"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
"unicode/utf8"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials/endpointcreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/logger/loggerutils"
"github.com/docker/docker/dockerversion"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
name = "awslogs"
regionKey = "awslogs-region"
endpointKey = "awslogs-endpoint"
regionEnvKey = "AWS_REGION"
logGroupKey = "awslogs-group"
logStreamKey = "awslogs-stream"
logCreateGroupKey = "awslogs-create-group"
tagKey = "tag"
datetimeFormatKey = "awslogs-datetime-format"
multilinePatternKey = "awslogs-multiline-pattern"
credentialsEndpointKey = "awslogs-credentials-endpoint"
forceFlushIntervalKey = "awslogs-force-flush-interval-seconds"
maxBufferedEventsKey = "awslogs-max-buffered-events"
defaultForceFlushInterval = 5 * time.Second
defaultMaxBufferedEvents = 4096
// See: http://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html
perEventBytes = 26
maximumBytesPerPut = 1048576
maximumLogEventsPerPut = 10000
// See: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_limits.html
// Because the events are interpreted as UTF-8 encoded Unicode, invalid UTF-8 byte sequences are replaced with the
// Unicode replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To compensate for that and to avoid
// splitting valid UTF-8 characters into invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
maximumBytesPerEvent = 262144 - perEventBytes
resourceAlreadyExistsCode = "ResourceAlreadyExistsException"
dataAlreadyAcceptedCode = "DataAlreadyAcceptedException"
invalidSequenceTokenCode = "InvalidSequenceTokenException"
resourceNotFoundCode = "ResourceNotFoundException"
credentialsEndpoint = "http://169.254.170.2"
userAgentHeader = "User-Agent"
)
type logStream struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
multilinePattern *regexp.Regexp
client api
messages chan *logger.Message
lock sync.RWMutex
closed bool
sequenceToken *string
}
type logStreamConfig struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
maxBufferedEvents int
multilinePattern *regexp.Regexp
}
var _ logger.SizedLogger = &logStream{}
type api interface {
CreateLogGroup(*cloudwatchlogs.CreateLogGroupInput) (*cloudwatchlogs.CreateLogGroupOutput, error)
CreateLogStream(*cloudwatchlogs.CreateLogStreamInput) (*cloudwatchlogs.CreateLogStreamOutput, error)
PutLogEvents(*cloudwatchlogs.PutLogEventsInput) (*cloudwatchlogs.PutLogEventsOutput, error)
}
type regionFinder interface {
Region() (string, error)
}
type wrappedEvent struct {
inputLogEvent *cloudwatchlogs.InputLogEvent
insertOrder int
}
type byTimestamp []wrappedEvent
// init registers the awslogs driver
func init() {
if err := logger.RegisterLogDriver(name, New); err != nil {
logrus.Fatal(err)
}
if err := logger.RegisterLogOptValidator(name, ValidateLogOpt); err != nil {
logrus.Fatal(err)
}
}
// eventBatch holds the events that are batched for submission and the
// associated data about it.
//
// Warning: this type is not threadsafe and must not be used
// concurrently. This type is expected to be consumed in a single go
// routine and never concurrently.
type eventBatch struct {
batch []wrappedEvent
bytes int
}
// New creates an awslogs logger using the configuration passed in on the
// context. Supported context configuration variables are awslogs-region,
// awslogs-endpoint, awslogs-group, awslogs-stream, awslogs-create-group,
// awslogs-multiline-pattern and awslogs-datetime-format.
// When available, configuration is also taken from environment variables
// AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, the shared credentials
// file (~/.aws/credentials), and the EC2 Instance Metadata Service.
func New(info logger.Info) (logger.Logger, error) {
containerStreamConfig, err := newStreamConfig(info)
if err != nil {
return nil, err
}
client, err := newAWSLogsClient(info)
if err != nil {
return nil, err
}
containerStream := &logStream{
logStreamName: containerStreamConfig.logStreamName,
logGroupName: containerStreamConfig.logGroupName,
logCreateGroup: containerStreamConfig.logCreateGroup,
logNonBlocking: containerStreamConfig.logNonBlocking,
forceFlushInterval: containerStreamConfig.forceFlushInterval,
multilinePattern: containerStreamConfig.multilinePattern,
client: client,
messages: make(chan *logger.Message, containerStreamConfig.maxBufferedEvents),
}
creationDone := make(chan bool)
if containerStream.logNonBlocking {
go func() {
backoff := 1
maxBackoff := 32
for {
// If logger is closed we are done
containerStream.lock.RLock()
if containerStream.closed {
containerStream.lock.RUnlock()
break
}
containerStream.lock.RUnlock()
err := containerStream.create()
if err == nil {
break
}
time.Sleep(time.Duration(backoff) * time.Second)
if backoff < maxBackoff {
backoff *= 2
}
logrus.
WithError(err).
WithField("container-id", info.ContainerID).
WithField("container-name", info.ContainerName).
Error("Error while trying to initialize awslogs. Retrying in: ", backoff, " seconds")
}
close(creationDone)
}()
} else {
if err = containerStream.create(); err != nil {
return nil, err
}
close(creationDone)
}
go containerStream.collectBatch(creationDone)
return containerStream, nil
}
// Parses most of the awslogs- options and prepares a config object to be used for newing the actual stream
// It has been formed out to ease Utest of the New above
func newStreamConfig(info logger.Info) (*logStreamConfig, error) {
logGroupName := info.Config[logGroupKey]
logStreamName, err := loggerutils.ParseLogTag(info, "{{.FullID}}")
if err != nil {
return nil, err
}
logCreateGroup := false
if info.Config[logCreateGroupKey] != "" {
logCreateGroup, err = strconv.ParseBool(info.Config[logCreateGroupKey])
if err != nil {
return nil, err
}
}
logNonBlocking := info.Config["mode"] == "non-blocking"
forceFlushInterval := defaultForceFlushInterval
if info.Config[forceFlushIntervalKey] != "" {
forceFlushIntervalAsInt, err := strconv.Atoi(info.Config[forceFlushIntervalKey])
if err != nil {
return nil, err
}
forceFlushInterval = time.Duration(forceFlushIntervalAsInt) * time.Second
}
maxBufferedEvents := int(defaultMaxBufferedEvents)
if info.Config[maxBufferedEventsKey] != "" {
maxBufferedEvents, err = strconv.Atoi(info.Config[maxBufferedEventsKey])
if err != nil {
return nil, err
}
}
if info.Config[logStreamKey] != "" {
logStreamName = info.Config[logStreamKey]
}
multilinePattern, err := parseMultilineOptions(info)
if err != nil {
return nil, err
}
containerStreamConfig := &logStreamConfig{
logStreamName: logStreamName,
logGroupName: logGroupName,
logCreateGroup: logCreateGroup,
logNonBlocking: logNonBlocking,
forceFlushInterval: forceFlushInterval,
maxBufferedEvents: maxBufferedEvents,
multilinePattern: multilinePattern,
}
return containerStreamConfig, nil
}
// Parses awslogs-multiline-pattern and awslogs-datetime-format options
// If awslogs-datetime-format is present, convert the format from strftime
// to regexp and return.
// If awslogs-multiline-pattern is present, compile regexp and return
func parseMultilineOptions(info logger.Info) (*regexp.Regexp, error) {
dateTimeFormat := info.Config[datetimeFormatKey]
multilinePatternKey := info.Config[multilinePatternKey]
// strftime input is parsed into a regular expression
if dateTimeFormat != "" {
// %. matches each strftime format sequence and ReplaceAllStringFunc
// looks up each format sequence in the conversion table strftimeToRegex
// to replace with a defined regular expression
r := regexp.MustCompile("%.")
multilinePatternKey = r.ReplaceAllStringFunc(dateTimeFormat, func(s string) string {
return strftimeToRegex[s]
})
}
if multilinePatternKey != "" {
multilinePattern, err := regexp.Compile(multilinePatternKey)
if err != nil {
return nil, errors.Wrapf(err, "awslogs could not parse multiline pattern key %q", multilinePatternKey)
}
return multilinePattern, nil
}
return nil, nil
}
// Maps strftime format strings to regex
var strftimeToRegex = map[string]string{
/*weekdayShort */ `%a`: `(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)`,
/*weekdayFull */ `%A`: `(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)`,
/*weekdayZeroIndex */ `%w`: `[0-6]`,
/*dayZeroPadded */ `%d`: `(?:0[1-9]|[1,2][0-9]|3[0,1])`,
/*monthShort */ `%b`: `(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)`,
/*monthFull */ `%B`: `(?:January|February|March|April|May|June|July|August|September|October|November|December)`,
/*monthZeroPadded */ `%m`: `(?:0[1-9]|1[0-2])`,
/*yearCentury */ `%Y`: `\d{4}`,
/*yearZeroPadded */ `%y`: `\d{2}`,
/*hour24ZeroPadded */ `%H`: `(?:[0,1][0-9]|2[0-3])`,
/*hour12ZeroPadded */ `%I`: `(?:0[0-9]|1[0-2])`,
/*AM or PM */ `%p`: "[A,P]M",
/*minuteZeroPadded */ `%M`: `[0-5][0-9]`,
/*secondZeroPadded */ `%S`: `[0-5][0-9]`,
/*microsecondZeroPadded */ `%f`: `\d{6}`,
/*utcOffset */ `%z`: `[+-]\d{4}`,
/*tzName */ `%Z`: `[A-Z]{1,4}T`,
/*dayOfYearZeroPadded */ `%j`: `(?:0[0-9][1-9]|[1,2][0-9][0-9]|3[0-5][0-9]|36[0-6])`,
/*milliseconds */ `%L`: `\.\d{3}`,
}
// newRegionFinder is a variable such that the implementation
// can be swapped out for unit tests.
var newRegionFinder = func() (regionFinder, error) {
s, err := session.NewSession()
if err != nil {
return nil, err
}
return ec2metadata.New(s), nil
}
// newSDKEndpoint is a variable such that the implementation
// can be swapped out for unit tests.
var newSDKEndpoint = credentialsEndpoint
// newAWSLogsClient creates the service client for Amazon CloudWatch Logs.
// Customizations to the default client from the SDK include a Docker-specific
// User-Agent string and automatic region detection using the EC2 Instance
// Metadata Service when region is otherwise unspecified.
func newAWSLogsClient(info logger.Info) (api, error) {
var region, endpoint *string
if os.Getenv(regionEnvKey) != "" {
region = aws.String(os.Getenv(regionEnvKey))
}
if info.Config[regionKey] != "" {
region = aws.String(info.Config[regionKey])
}
if info.Config[endpointKey] != "" {
endpoint = aws.String(info.Config[endpointKey])
}
if region == nil || *region == "" {
logrus.Info("Trying to get region from EC2 Metadata")
ec2MetadataClient, err := newRegionFinder()
if err != nil {
logrus.WithError(err).Error("could not create EC2 metadata client")
return nil, errors.Wrap(err, "could not create EC2 metadata client")
}
r, err := ec2MetadataClient.Region()
if err != nil {
logrus.WithError(err).Error("Could not get region from EC2 metadata, environment, or log option")
return nil, errors.New("Cannot determine region for awslogs driver")
}
region = &r
}
sess, err := session.NewSession()
if err != nil {
return nil, errors.New("Failed to create a service client session for awslogs driver")
}
// attach region to cloudwatchlogs config
sess.Config.Region = region
// attach endpoint to cloudwatchlogs config
if endpoint != nil {
sess.Config.Endpoint = endpoint
}
if uri, ok := info.Config[credentialsEndpointKey]; ok {
logrus.Debugf("Trying to get credentials from awslogs-credentials-endpoint")
endpoint := fmt.Sprintf("%s%s", newSDKEndpoint, uri)
creds := endpointcreds.NewCredentialsClient(*sess.Config, sess.Handlers, endpoint,
func(p *endpointcreds.Provider) {
p.ExpiryWindow = 5 * time.Minute
})
// attach credentials to cloudwatchlogs config
sess.Config.Credentials = creds
}
logrus.WithFields(logrus.Fields{
"region": *region,
}).Debug("Created awslogs client")
client := cloudwatchlogs.New(sess)
client.Handlers.Build.PushBackNamed(request.NamedHandler{
Name: "DockerUserAgentHandler",
Fn: func(r *request.Request) {
currentAgent := r.HTTPRequest.Header.Get(userAgentHeader)
r.HTTPRequest.Header.Set(userAgentHeader,
fmt.Sprintf("Docker %s (%s) %s",
dockerversion.Version, runtime.GOOS, currentAgent))
},
})
return client, nil
}
// Name returns the name of the awslogs logging driver
func (l *logStream) Name() string {
return name
}
func (l *logStream) BufSize() int {
return maximumBytesPerEvent
}
// Log submits messages for logging by an instance of the awslogs logging driver
func (l *logStream) Log(msg *logger.Message) error {
l.lock.RLock()
defer l.lock.RUnlock()
if l.closed {
return errors.New("awslogs is closed")
}
if l.logNonBlocking {
select {
case l.messages <- msg:
return nil
default:
return errors.New("awslogs buffer is full")
}
}
l.messages <- msg
return nil
}
// Close closes the instance of the awslogs logging driver
func (l *logStream) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if !l.closed {
close(l.messages)
}
l.closed = true
return nil
}
// create creates log group and log stream for the instance of the awslogs logging driver
func (l *logStream) create() error {
err := l.createLogStream()
if err == nil {
return nil
}
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == resourceNotFoundCode && l.logCreateGroup {
if err := l.createLogGroup(); err != nil {
return errors.Wrap(err, "failed to create Cloudwatch log group")
}
err = l.createLogStream()
if err == nil {
return nil
}
}
return errors.Wrap(err, "failed to create Cloudwatch log stream")
}
// createLogGroup creates a log group for the instance of the awslogs logging driver
func (l *logStream) createLogGroup() error {
if _, err := l.client.CreateLogGroup(&cloudwatchlogs.CreateLogGroupInput{
LogGroupName: aws.String(l.logGroupName),
}); err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logCreateGroup": l.logCreateGroup,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log group already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log group")
}
return err
}
return nil
}
// createLogStream creates a log stream for the instance of the awslogs logging driver
func (l *logStream) createLogStream() error {
input := &cloudwatchlogs.CreateLogStreamInput{
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
_, err := l.client.CreateLogStream(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log stream already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log stream")
}
}
return err
}
// newTicker is used for time-based batching. newTicker is a variable such
// that the implementation can be swapped out for unit tests.
var newTicker = func(freq time.Duration) *time.Ticker {
return time.NewTicker(freq)
}
// collectBatch executes as a goroutine to perform batching of log events for
// submission to the log stream. If the awslogs-multiline-pattern or
// awslogs-datetime-format options have been configured, multiline processing
// is enabled, where log messages are stored in an event buffer until a multiline
// pattern match is found, at which point the messages in the event buffer are
// pushed to CloudWatch logs as a single log event. Multiline messages are processed
// according to the maximumBytesPerPut constraint, and the implementation only
// allows for messages to be buffered for a maximum of 2*batchPublishFrequency
// seconds. When events are ready to be processed for submission to CloudWatch
// Logs, the processEvents method is called. If a multiline pattern is not
// configured, log events are submitted to the processEvents method immediately.
func (l *logStream) collectBatch(created chan bool) {
// Wait for the logstream/group to be created
<-created
flushInterval := l.forceFlushInterval
if flushInterval <= 0 {
flushInterval = defaultForceFlushInterval
}
ticker := newTicker(flushInterval)
var eventBuffer []byte
var eventBufferTimestamp int64
var batch = newEventBatch()
for {
select {
case t := <-ticker.C:
// If event buffer is older than batch publish frequency flush the event buffer
if eventBufferTimestamp > 0 && len(eventBuffer) > 0 {
eventBufferAge := t.UnixNano()/int64(time.Millisecond) - eventBufferTimestamp
eventBufferExpired := eventBufferAge >= int64(flushInterval)/int64(time.Millisecond)
eventBufferNegative := eventBufferAge < 0
if eventBufferExpired || eventBufferNegative {
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBuffer = eventBuffer[:0]
}
}
l.publishBatch(batch)
batch.reset()
case msg, more := <-l.messages:
if !more {
// Flush event buffer and release resources
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
l.publishBatch(batch)
batch.reset()
return
}
if eventBufferTimestamp == 0 {
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
}
line := msg.Line
if l.multilinePattern != nil {
lineEffectiveLen := effectiveLen(string(line))
if l.multilinePattern.Match(line) || effectiveLen(string(eventBuffer))+lineEffectiveLen > maximumBytesPerEvent {
// This is a new log event or we will exceed max bytes per event
// so flush the current eventBuffer to events and reset timestamp
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
eventBuffer = eventBuffer[:0]
}
// Append newline if event is less than max event size
if lineEffectiveLen < maximumBytesPerEvent {
line = append(line, "\n"...)
}
eventBuffer = append(eventBuffer, line...)
logger.PutMessage(msg)
} else {
l.processEvent(batch, line, msg.Timestamp.UnixNano()/int64(time.Millisecond))
logger.PutMessage(msg)
}
}
}
}
// processEvent processes log events that are ready for submission to CloudWatch
// logs. Batching is performed on time- and size-bases. Time-based batching
// occurs at a 5 second interval (defined in the batchPublishFrequency const).
// Size-based batching is performed on the maximum number of events per batch
// (defined in maximumLogEventsPerPut) and the maximum number of total bytes in a
// batch (defined in maximumBytesPerPut). Log messages are split by the maximum
// bytes per event (defined in maximumBytesPerEvent). There is a fixed per-event
// byte overhead (defined in perEventBytes) which is accounted for in split- and
// batch-calculations. Because the events are interpreted as UTF-8 encoded
// Unicode, invalid UTF-8 byte sequences are replaced with the Unicode
// replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To
// compensate for that and to avoid splitting valid UTF-8 characters into
// invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
func (l *logStream) processEvent(batch *eventBatch, bytes []byte, timestamp int64) {
for len(bytes) > 0 {
// Split line length so it does not exceed the maximum
splitOffset, lineBytes := findValidSplit(string(bytes), maximumBytesPerEvent)
line := bytes[:splitOffset]
event := wrappedEvent{
inputLogEvent: &cloudwatchlogs.InputLogEvent{
Message: aws.String(string(line)),
Timestamp: aws.Int64(timestamp),
},
insertOrder: batch.count(),
}
added := batch.add(event, lineBytes)
if added {
bytes = bytes[splitOffset:]
} else {
l.publishBatch(batch)
batch.reset()
}
}
}
// effectiveLen counts the effective number of bytes in the string, after
// UTF-8 normalization. UTF-8 normalization includes replacing bytes that do
// not constitute valid UTF-8 encoded Unicode codepoints with the Unicode
// replacement codepoint U+FFFD (a 3-byte UTF-8 sequence, represented in Go as
// utf8.RuneError)
func effectiveLen(line string) int {
effectiveBytes := 0
for _, rune := range line {
effectiveBytes += utf8.RuneLen(rune)
}
return effectiveBytes
}
// findValidSplit finds the byte offset to split a string without breaking valid
// Unicode codepoints given a maximum number of total bytes. findValidSplit
// returns the byte offset for splitting a string or []byte, as well as the
// effective number of bytes if the string were normalized to replace invalid
// UTF-8 encoded bytes with the Unicode replacement character (a 3-byte UTF-8
// sequence, represented in Go as utf8.RuneError)
func findValidSplit(line string, maxBytes int) (splitOffset, effectiveBytes int) {
for offset, rune := range line {
splitOffset = offset
if effectiveBytes+utf8.RuneLen(rune) > maxBytes {
return splitOffset, effectiveBytes
}
effectiveBytes += utf8.RuneLen(rune)
}
splitOffset = len(line)
return
}
// publishBatch calls PutLogEvents for a given set of InputLogEvents,
// accounting for sequencing requirements (each request must reference the
// sequence token returned by the previous request).
func (l *logStream) publishBatch(batch *eventBatch) {
if batch.isEmpty() {
return
}
cwEvents := unwrapEvents(batch.events())
nextSequenceToken, err := l.putLogEvents(cwEvents, l.sequenceToken)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == dataAlreadyAcceptedCode {
// already submitted, just grab the correct sequence token
parts := strings.Split(awsErr.Message(), " ")
nextSequenceToken = &parts[len(parts)-1]
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Info("Data already accepted, ignoring error")
err = nil
} else if awsErr.Code() == invalidSequenceTokenCode {
// sequence code is bad, grab the correct one and retry
parts := strings.Split(awsErr.Message(), " ")
token := parts[len(parts)-1]
nextSequenceToken, err = l.putLogEvents(cwEvents, &token)
}
}
}
if err != nil {
logrus.Error(err)
} else {
l.sequenceToken = nextSequenceToken
}
}
// putLogEvents wraps the PutLogEvents API
func (l *logStream) putLogEvents(events []*cloudwatchlogs.InputLogEvent, sequenceToken *string) (*string, error) {
input := &cloudwatchlogs.PutLogEventsInput{
LogEvents: events,
SequenceToken: sequenceToken,
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
resp, err := l.client.PutLogEvents(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Error("Failed to put log events")
}
return nil, err
}
return resp.NextSequenceToken, nil
}
// ValidateLogOpt looks for awslogs-specific log options awslogs-region, awslogs-endpoint
// awslogs-group, awslogs-stream, awslogs-create-group, awslogs-datetime-format,
// awslogs-multiline-pattern
func ValidateLogOpt(cfg map[string]string) error {
for key := range cfg {
switch key {
case logGroupKey:
case logStreamKey:
case logCreateGroupKey:
case regionKey:
case endpointKey:
case tagKey:
case datetimeFormatKey:
case multilinePatternKey:
case credentialsEndpointKey:
case forceFlushIntervalKey:
case maxBufferedEventsKey:
default:
return fmt.Errorf("unknown log opt '%s' for %s log driver", key, name)
}
}
if cfg[logGroupKey] == "" {
return fmt.Errorf("must specify a value for log opt '%s'", logGroupKey)
}
if cfg[logCreateGroupKey] != "" {
if _, err := strconv.ParseBool(cfg[logCreateGroupKey]); err != nil {
return fmt.Errorf("must specify valid value for log opt '%s': %v", logCreateGroupKey, err)
}
}
if cfg[forceFlushIntervalKey] != "" {
if value, err := strconv.Atoi(cfg[forceFlushIntervalKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", forceFlushIntervalKey, cfg[forceFlushIntervalKey])
}
}
if cfg[maxBufferedEventsKey] != "" {
if value, err := strconv.Atoi(cfg[maxBufferedEventsKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", maxBufferedEventsKey, cfg[maxBufferedEventsKey])
}
}
_, datetimeFormatKeyExists := cfg[datetimeFormatKey]
_, multilinePatternKeyExists := cfg[multilinePatternKey]
if datetimeFormatKeyExists && multilinePatternKeyExists {
return fmt.Errorf("you cannot configure log opt '%s' and '%s' at the same time", datetimeFormatKey, multilinePatternKey)
}
return nil
}
// Len returns the length of a byTimestamp slice. Len is required by the
// sort.Interface interface.
func (slice byTimestamp) Len() int {
return len(slice)
}
// Less compares two values in a byTimestamp slice by Timestamp. Less is
// required by the sort.Interface interface.
func (slice byTimestamp) Less(i, j int) bool {
iTimestamp, jTimestamp := int64(0), int64(0)
if slice != nil && slice[i].inputLogEvent.Timestamp != nil {
iTimestamp = *slice[i].inputLogEvent.Timestamp
}
if slice != nil && slice[j].inputLogEvent.Timestamp != nil {
jTimestamp = *slice[j].inputLogEvent.Timestamp
}
if iTimestamp == jTimestamp {
return slice[i].insertOrder < slice[j].insertOrder
}
return iTimestamp < jTimestamp
}
// Swap swaps two values in a byTimestamp slice with each other. Swap is
// required by the sort.Interface interface.
func (slice byTimestamp) Swap(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
func unwrapEvents(events []wrappedEvent) []*cloudwatchlogs.InputLogEvent {
cwEvents := make([]*cloudwatchlogs.InputLogEvent, len(events))
for i, input := range events {
cwEvents[i] = input.inputLogEvent
}
return cwEvents
}
func newEventBatch() *eventBatch {
return &eventBatch{
batch: make([]wrappedEvent, 0),
bytes: 0,
}
}
// events returns a slice of wrappedEvents sorted in order of their
// timestamps and then by their insertion order (see `byTimestamp`).
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) events() []wrappedEvent {
sort.Sort(byTimestamp(b.batch))
return b.batch
}
// add adds an event to the batch of events accounting for the
// necessary overhead for an event to be logged. An error will be
// returned if the event cannot be added to the batch due to service
// limits.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) add(event wrappedEvent, size int) bool {
addBytes := size + perEventBytes
// verify we are still within service limits
switch {
case len(b.batch)+1 > maximumLogEventsPerPut:
return false
case b.bytes+addBytes > maximumBytesPerPut:
return false
}
b.bytes += addBytes
b.batch = append(b.batch, event)
return true
}
// count is the number of batched events. Warning: this method
// is not threadsafe and must not be used concurrently.
func (b *eventBatch) count() int {
return len(b.batch)
}
// size is the total number of bytes that the batch represents.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) size() int {
return b.bytes
}
func (b *eventBatch) isEmpty() bool {
zeroEvents := b.count() == 0
zeroSize := b.size() == 0
return zeroEvents && zeroSize
}
// reset prepares the batch for reuse.
func (b *eventBatch) reset() {
b.bytes = 0
b.batch = b.batch[:0]
}
| // Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
package awslogs // import "github.com/docker/docker/daemon/logger/awslogs"
import (
"fmt"
"os"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
"unicode/utf8"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials/endpointcreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/logger/loggerutils"
"github.com/docker/docker/dockerversion"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
name = "awslogs"
regionKey = "awslogs-region"
endpointKey = "awslogs-endpoint"
regionEnvKey = "AWS_REGION"
logGroupKey = "awslogs-group"
logStreamKey = "awslogs-stream"
logCreateGroupKey = "awslogs-create-group"
tagKey = "tag"
datetimeFormatKey = "awslogs-datetime-format"
multilinePatternKey = "awslogs-multiline-pattern"
credentialsEndpointKey = "awslogs-credentials-endpoint"
forceFlushIntervalKey = "awslogs-force-flush-interval-seconds"
maxBufferedEventsKey = "awslogs-max-buffered-events"
defaultForceFlushInterval = 5 * time.Second
defaultMaxBufferedEvents = 4096
// See: http://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html
perEventBytes = 26
maximumBytesPerPut = 1048576
maximumLogEventsPerPut = 10000
// See: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_limits.html
// Because the events are interpreted as UTF-8 encoded Unicode, invalid UTF-8 byte sequences are replaced with the
// Unicode replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To compensate for that and to avoid
// splitting valid UTF-8 characters into invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
maximumBytesPerEvent = 262144 - perEventBytes
resourceAlreadyExistsCode = "ResourceAlreadyExistsException"
dataAlreadyAcceptedCode = "DataAlreadyAcceptedException"
invalidSequenceTokenCode = "InvalidSequenceTokenException"
resourceNotFoundCode = "ResourceNotFoundException"
credentialsEndpoint = "http://169.254.170.2"
userAgentHeader = "User-Agent"
)
type logStream struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
multilinePattern *regexp.Regexp
client api
messages chan *logger.Message
lock sync.RWMutex
closed bool
sequenceToken *string
}
type logStreamConfig struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
maxBufferedEvents int
multilinePattern *regexp.Regexp
}
var _ logger.SizedLogger = &logStream{}
type api interface {
CreateLogGroup(*cloudwatchlogs.CreateLogGroupInput) (*cloudwatchlogs.CreateLogGroupOutput, error)
CreateLogStream(*cloudwatchlogs.CreateLogStreamInput) (*cloudwatchlogs.CreateLogStreamOutput, error)
PutLogEvents(*cloudwatchlogs.PutLogEventsInput) (*cloudwatchlogs.PutLogEventsOutput, error)
}
type regionFinder interface {
Region() (string, error)
}
type wrappedEvent struct {
inputLogEvent *cloudwatchlogs.InputLogEvent
insertOrder int
}
type byTimestamp []wrappedEvent
// init registers the awslogs driver
func init() {
if err := logger.RegisterLogDriver(name, New); err != nil {
logrus.Fatal(err)
}
if err := logger.RegisterLogOptValidator(name, ValidateLogOpt); err != nil {
logrus.Fatal(err)
}
}
// eventBatch holds the events that are batched for submission and the
// associated data about it.
//
// Warning: this type is not threadsafe and must not be used
// concurrently. This type is expected to be consumed in a single go
// routine and never concurrently.
type eventBatch struct {
batch []wrappedEvent
bytes int
}
// New creates an awslogs logger using the configuration passed in on the
// context. Supported context configuration variables are awslogs-region,
// awslogs-endpoint, awslogs-group, awslogs-stream, awslogs-create-group,
// awslogs-multiline-pattern and awslogs-datetime-format.
// When available, configuration is also taken from environment variables
// AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, the shared credentials
// file (~/.aws/credentials), and the EC2 Instance Metadata Service.
func New(info logger.Info) (logger.Logger, error) {
containerStreamConfig, err := newStreamConfig(info)
if err != nil {
return nil, err
}
client, err := newAWSLogsClient(info)
if err != nil {
return nil, err
}
containerStream := &logStream{
logStreamName: containerStreamConfig.logStreamName,
logGroupName: containerStreamConfig.logGroupName,
logCreateGroup: containerStreamConfig.logCreateGroup,
logNonBlocking: containerStreamConfig.logNonBlocking,
forceFlushInterval: containerStreamConfig.forceFlushInterval,
multilinePattern: containerStreamConfig.multilinePattern,
client: client,
messages: make(chan *logger.Message, containerStreamConfig.maxBufferedEvents),
}
creationDone := make(chan bool)
if containerStream.logNonBlocking {
go func() {
backoff := 1
maxBackoff := 32
for {
// If logger is closed we are done
containerStream.lock.RLock()
if containerStream.closed {
containerStream.lock.RUnlock()
break
}
containerStream.lock.RUnlock()
err := containerStream.create()
if err == nil {
break
}
time.Sleep(time.Duration(backoff) * time.Second)
if backoff < maxBackoff {
backoff *= 2
}
logrus.
WithError(err).
WithField("container-id", info.ContainerID).
WithField("container-name", info.ContainerName).
Error("Error while trying to initialize awslogs. Retrying in: ", backoff, " seconds")
}
close(creationDone)
}()
} else {
if err = containerStream.create(); err != nil {
return nil, err
}
close(creationDone)
}
go containerStream.collectBatch(creationDone)
return containerStream, nil
}
// Parses most of the awslogs- options and prepares a config object to be used for newing the actual stream
// It has been formed out to ease Utest of the New above
func newStreamConfig(info logger.Info) (*logStreamConfig, error) {
logGroupName := info.Config[logGroupKey]
logStreamName, err := loggerutils.ParseLogTag(info, "{{.FullID}}")
if err != nil {
return nil, err
}
logCreateGroup := false
if info.Config[logCreateGroupKey] != "" {
logCreateGroup, err = strconv.ParseBool(info.Config[logCreateGroupKey])
if err != nil {
return nil, err
}
}
logNonBlocking := info.Config["mode"] == "non-blocking"
forceFlushInterval := defaultForceFlushInterval
if info.Config[forceFlushIntervalKey] != "" {
forceFlushIntervalAsInt, err := strconv.Atoi(info.Config[forceFlushIntervalKey])
if err != nil {
return nil, err
}
forceFlushInterval = time.Duration(forceFlushIntervalAsInt) * time.Second
}
maxBufferedEvents := int(defaultMaxBufferedEvents)
if info.Config[maxBufferedEventsKey] != "" {
maxBufferedEvents, err = strconv.Atoi(info.Config[maxBufferedEventsKey])
if err != nil {
return nil, err
}
}
if info.Config[logStreamKey] != "" {
logStreamName = info.Config[logStreamKey]
}
multilinePattern, err := parseMultilineOptions(info)
if err != nil {
return nil, err
}
containerStreamConfig := &logStreamConfig{
logStreamName: logStreamName,
logGroupName: logGroupName,
logCreateGroup: logCreateGroup,
logNonBlocking: logNonBlocking,
forceFlushInterval: forceFlushInterval,
maxBufferedEvents: maxBufferedEvents,
multilinePattern: multilinePattern,
}
return containerStreamConfig, nil
}
// Parses awslogs-multiline-pattern and awslogs-datetime-format options
// If awslogs-datetime-format is present, convert the format from strftime
// to regexp and return.
// If awslogs-multiline-pattern is present, compile regexp and return
func parseMultilineOptions(info logger.Info) (*regexp.Regexp, error) {
dateTimeFormat := info.Config[datetimeFormatKey]
multilinePatternKey := info.Config[multilinePatternKey]
// strftime input is parsed into a regular expression
if dateTimeFormat != "" {
// %. matches each strftime format sequence and ReplaceAllStringFunc
// looks up each format sequence in the conversion table strftimeToRegex
// to replace with a defined regular expression
r := regexp.MustCompile("%.")
multilinePatternKey = r.ReplaceAllStringFunc(dateTimeFormat, func(s string) string {
return strftimeToRegex[s]
})
}
if multilinePatternKey != "" {
multilinePattern, err := regexp.Compile(multilinePatternKey)
if err != nil {
return nil, errors.Wrapf(err, "awslogs could not parse multiline pattern key %q", multilinePatternKey)
}
return multilinePattern, nil
}
return nil, nil
}
// Maps strftime format strings to regex
var strftimeToRegex = map[string]string{
/*weekdayShort */ `%a`: `(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)`,
/*weekdayFull */ `%A`: `(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)`,
/*weekdayZeroIndex */ `%w`: `[0-6]`,
/*dayZeroPadded */ `%d`: `(?:0[1-9]|[1,2][0-9]|3[0,1])`,
/*monthShort */ `%b`: `(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)`,
/*monthFull */ `%B`: `(?:January|February|March|April|May|June|July|August|September|October|November|December)`,
/*monthZeroPadded */ `%m`: `(?:0[1-9]|1[0-2])`,
/*yearCentury */ `%Y`: `\d{4}`,
/*yearZeroPadded */ `%y`: `\d{2}`,
/*hour24ZeroPadded */ `%H`: `(?:[0,1][0-9]|2[0-3])`,
/*hour12ZeroPadded */ `%I`: `(?:0[0-9]|1[0-2])`,
/*AM or PM */ `%p`: "[A,P]M",
/*minuteZeroPadded */ `%M`: `[0-5][0-9]`,
/*secondZeroPadded */ `%S`: `[0-5][0-9]`,
/*microsecondZeroPadded */ `%f`: `\d{6}`,
/*utcOffset */ `%z`: `[+-]\d{4}`,
/*tzName */ `%Z`: `[A-Z]{1,4}T`,
/*dayOfYearZeroPadded */ `%j`: `(?:0[0-9][1-9]|[1,2][0-9][0-9]|3[0-5][0-9]|36[0-6])`,
/*milliseconds */ `%L`: `\.\d{3}`,
}
// newRegionFinder is a variable such that the implementation
// can be swapped out for unit tests.
var newRegionFinder = func() (regionFinder, error) {
s, err := session.NewSession()
if err != nil {
return nil, err
}
return ec2metadata.New(s), nil
}
// newSDKEndpoint is a variable such that the implementation
// can be swapped out for unit tests.
var newSDKEndpoint = credentialsEndpoint
// newAWSLogsClient creates the service client for Amazon CloudWatch Logs.
// Customizations to the default client from the SDK include a Docker-specific
// User-Agent string and automatic region detection using the EC2 Instance
// Metadata Service when region is otherwise unspecified.
func newAWSLogsClient(info logger.Info) (api, error) {
var region, endpoint *string
if os.Getenv(regionEnvKey) != "" {
region = aws.String(os.Getenv(regionEnvKey))
}
if info.Config[regionKey] != "" {
region = aws.String(info.Config[regionKey])
}
if info.Config[endpointKey] != "" {
endpoint = aws.String(info.Config[endpointKey])
}
if region == nil || *region == "" {
logrus.Info("Trying to get region from EC2 Metadata")
ec2MetadataClient, err := newRegionFinder()
if err != nil {
logrus.WithError(err).Error("could not create EC2 metadata client")
return nil, errors.Wrap(err, "could not create EC2 metadata client")
}
r, err := ec2MetadataClient.Region()
if err != nil {
logrus.WithError(err).Error("Could not get region from EC2 metadata, environment, or log option")
return nil, errors.New("Cannot determine region for awslogs driver")
}
region = &r
}
sess, err := session.NewSession()
if err != nil {
return nil, errors.New("Failed to create a service client session for awslogs driver")
}
// attach region to cloudwatchlogs config
sess.Config.Region = region
// attach endpoint to cloudwatchlogs config
if endpoint != nil {
sess.Config.Endpoint = endpoint
}
if uri, ok := info.Config[credentialsEndpointKey]; ok {
logrus.Debugf("Trying to get credentials from awslogs-credentials-endpoint")
endpoint := fmt.Sprintf("%s%s", newSDKEndpoint, uri)
creds := endpointcreds.NewCredentialsClient(*sess.Config, sess.Handlers, endpoint,
func(p *endpointcreds.Provider) {
p.ExpiryWindow = 5 * time.Minute
})
// attach credentials to cloudwatchlogs config
sess.Config.Credentials = creds
}
logrus.WithFields(logrus.Fields{
"region": *region,
}).Debug("Created awslogs client")
client := cloudwatchlogs.New(sess)
client.Handlers.Build.PushBackNamed(request.NamedHandler{
Name: "DockerUserAgentHandler",
Fn: func(r *request.Request) {
currentAgent := r.HTTPRequest.Header.Get(userAgentHeader)
r.HTTPRequest.Header.Set(userAgentHeader,
fmt.Sprintf("Docker %s (%s) %s",
dockerversion.Version, runtime.GOOS, currentAgent))
},
})
return client, nil
}
// Name returns the name of the awslogs logging driver
func (l *logStream) Name() string {
return name
}
// BufSize returns the maximum bytes CloudWatch can handle.
func (l *logStream) BufSize() int {
return maximumBytesPerEvent
}
// Log submits messages for logging by an instance of the awslogs logging driver
func (l *logStream) Log(msg *logger.Message) error {
l.lock.RLock()
defer l.lock.RUnlock()
if l.closed {
return errors.New("awslogs is closed")
}
if l.logNonBlocking {
select {
case l.messages <- msg:
return nil
default:
return errors.New("awslogs buffer is full")
}
}
l.messages <- msg
return nil
}
// Close closes the instance of the awslogs logging driver
func (l *logStream) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if !l.closed {
close(l.messages)
}
l.closed = true
return nil
}
// create creates log group and log stream for the instance of the awslogs logging driver
func (l *logStream) create() error {
err := l.createLogStream()
if err == nil {
return nil
}
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == resourceNotFoundCode && l.logCreateGroup {
if err := l.createLogGroup(); err != nil {
return errors.Wrap(err, "failed to create Cloudwatch log group")
}
err = l.createLogStream()
if err == nil {
return nil
}
}
return errors.Wrap(err, "failed to create Cloudwatch log stream")
}
// createLogGroup creates a log group for the instance of the awslogs logging driver
func (l *logStream) createLogGroup() error {
if _, err := l.client.CreateLogGroup(&cloudwatchlogs.CreateLogGroupInput{
LogGroupName: aws.String(l.logGroupName),
}); err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logCreateGroup": l.logCreateGroup,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log group already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log group")
}
return err
}
return nil
}
// createLogStream creates a log stream for the instance of the awslogs logging driver
func (l *logStream) createLogStream() error {
input := &cloudwatchlogs.CreateLogStreamInput{
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
_, err := l.client.CreateLogStream(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log stream already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log stream")
}
}
return err
}
// newTicker is used for time-based batching. newTicker is a variable such
// that the implementation can be swapped out for unit tests.
var newTicker = func(freq time.Duration) *time.Ticker {
return time.NewTicker(freq)
}
// collectBatch executes as a goroutine to perform batching of log events for
// submission to the log stream. If the awslogs-multiline-pattern or
// awslogs-datetime-format options have been configured, multiline processing
// is enabled, where log messages are stored in an event buffer until a multiline
// pattern match is found, at which point the messages in the event buffer are
// pushed to CloudWatch logs as a single log event. Multiline messages are processed
// according to the maximumBytesPerPut constraint, and the implementation only
// allows for messages to be buffered for a maximum of 2*batchPublishFrequency
// seconds. When events are ready to be processed for submission to CloudWatch
// Logs, the processEvents method is called. If a multiline pattern is not
// configured, log events are submitted to the processEvents method immediately.
func (l *logStream) collectBatch(created chan bool) {
// Wait for the logstream/group to be created
<-created
flushInterval := l.forceFlushInterval
if flushInterval <= 0 {
flushInterval = defaultForceFlushInterval
}
ticker := newTicker(flushInterval)
var eventBuffer []byte
var eventBufferTimestamp int64
var batch = newEventBatch()
for {
select {
case t := <-ticker.C:
// If event buffer is older than batch publish frequency flush the event buffer
if eventBufferTimestamp > 0 && len(eventBuffer) > 0 {
eventBufferAge := t.UnixNano()/int64(time.Millisecond) - eventBufferTimestamp
eventBufferExpired := eventBufferAge >= int64(flushInterval)/int64(time.Millisecond)
eventBufferNegative := eventBufferAge < 0
if eventBufferExpired || eventBufferNegative {
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBuffer = eventBuffer[:0]
}
}
l.publishBatch(batch)
batch.reset()
case msg, more := <-l.messages:
if !more {
// Flush event buffer and release resources
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
l.publishBatch(batch)
batch.reset()
return
}
if eventBufferTimestamp == 0 {
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
}
line := msg.Line
if l.multilinePattern != nil {
lineEffectiveLen := effectiveLen(string(line))
if l.multilinePattern.Match(line) || effectiveLen(string(eventBuffer))+lineEffectiveLen > maximumBytesPerEvent {
// This is a new log event or we will exceed max bytes per event
// so flush the current eventBuffer to events and reset timestamp
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
eventBuffer = eventBuffer[:0]
}
// Append newline if event is less than max event size
if lineEffectiveLen < maximumBytesPerEvent {
line = append(line, "\n"...)
}
eventBuffer = append(eventBuffer, line...)
logger.PutMessage(msg)
} else {
l.processEvent(batch, line, msg.Timestamp.UnixNano()/int64(time.Millisecond))
logger.PutMessage(msg)
}
}
}
}
// processEvent processes log events that are ready for submission to CloudWatch
// logs. Batching is performed on time- and size-bases. Time-based batching
// occurs at a 5 second interval (defined in the batchPublishFrequency const).
// Size-based batching is performed on the maximum number of events per batch
// (defined in maximumLogEventsPerPut) and the maximum number of total bytes in a
// batch (defined in maximumBytesPerPut). Log messages are split by the maximum
// bytes per event (defined in maximumBytesPerEvent). There is a fixed per-event
// byte overhead (defined in perEventBytes) which is accounted for in split- and
// batch-calculations. Because the events are interpreted as UTF-8 encoded
// Unicode, invalid UTF-8 byte sequences are replaced with the Unicode
// replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To
// compensate for that and to avoid splitting valid UTF-8 characters into
// invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
func (l *logStream) processEvent(batch *eventBatch, bytes []byte, timestamp int64) {
for len(bytes) > 0 {
// Split line length so it does not exceed the maximum
splitOffset, lineBytes := findValidSplit(string(bytes), maximumBytesPerEvent)
line := bytes[:splitOffset]
event := wrappedEvent{
inputLogEvent: &cloudwatchlogs.InputLogEvent{
Message: aws.String(string(line)),
Timestamp: aws.Int64(timestamp),
},
insertOrder: batch.count(),
}
added := batch.add(event, lineBytes)
if added {
bytes = bytes[splitOffset:]
} else {
l.publishBatch(batch)
batch.reset()
}
}
}
// effectiveLen counts the effective number of bytes in the string, after
// UTF-8 normalization. UTF-8 normalization includes replacing bytes that do
// not constitute valid UTF-8 encoded Unicode codepoints with the Unicode
// replacement codepoint U+FFFD (a 3-byte UTF-8 sequence, represented in Go as
// utf8.RuneError)
func effectiveLen(line string) int {
effectiveBytes := 0
for _, rune := range line {
effectiveBytes += utf8.RuneLen(rune)
}
return effectiveBytes
}
// findValidSplit finds the byte offset to split a string without breaking valid
// Unicode codepoints given a maximum number of total bytes. findValidSplit
// returns the byte offset for splitting a string or []byte, as well as the
// effective number of bytes if the string were normalized to replace invalid
// UTF-8 encoded bytes with the Unicode replacement character (a 3-byte UTF-8
// sequence, represented in Go as utf8.RuneError)
func findValidSplit(line string, maxBytes int) (splitOffset, effectiveBytes int) {
for offset, rune := range line {
splitOffset = offset
if effectiveBytes+utf8.RuneLen(rune) > maxBytes {
return splitOffset, effectiveBytes
}
effectiveBytes += utf8.RuneLen(rune)
}
splitOffset = len(line)
return
}
// publishBatch calls PutLogEvents for a given set of InputLogEvents,
// accounting for sequencing requirements (each request must reference the
// sequence token returned by the previous request).
func (l *logStream) publishBatch(batch *eventBatch) {
if batch.isEmpty() {
return
}
cwEvents := unwrapEvents(batch.events())
nextSequenceToken, err := l.putLogEvents(cwEvents, l.sequenceToken)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == dataAlreadyAcceptedCode {
// already submitted, just grab the correct sequence token
parts := strings.Split(awsErr.Message(), " ")
nextSequenceToken = &parts[len(parts)-1]
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Info("Data already accepted, ignoring error")
err = nil
} else if awsErr.Code() == invalidSequenceTokenCode {
// sequence code is bad, grab the correct one and retry
parts := strings.Split(awsErr.Message(), " ")
token := parts[len(parts)-1]
nextSequenceToken, err = l.putLogEvents(cwEvents, &token)
}
}
}
if err != nil {
logrus.Error(err)
} else {
l.sequenceToken = nextSequenceToken
}
}
// putLogEvents wraps the PutLogEvents API
func (l *logStream) putLogEvents(events []*cloudwatchlogs.InputLogEvent, sequenceToken *string) (*string, error) {
input := &cloudwatchlogs.PutLogEventsInput{
LogEvents: events,
SequenceToken: sequenceToken,
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
resp, err := l.client.PutLogEvents(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Error("Failed to put log events")
}
return nil, err
}
return resp.NextSequenceToken, nil
}
// ValidateLogOpt looks for awslogs-specific log options awslogs-region, awslogs-endpoint
// awslogs-group, awslogs-stream, awslogs-create-group, awslogs-datetime-format,
// awslogs-multiline-pattern
func ValidateLogOpt(cfg map[string]string) error {
for key := range cfg {
switch key {
case logGroupKey:
case logStreamKey:
case logCreateGroupKey:
case regionKey:
case endpointKey:
case tagKey:
case datetimeFormatKey:
case multilinePatternKey:
case credentialsEndpointKey:
case forceFlushIntervalKey:
case maxBufferedEventsKey:
default:
return fmt.Errorf("unknown log opt '%s' for %s log driver", key, name)
}
}
if cfg[logGroupKey] == "" {
return fmt.Errorf("must specify a value for log opt '%s'", logGroupKey)
}
if cfg[logCreateGroupKey] != "" {
if _, err := strconv.ParseBool(cfg[logCreateGroupKey]); err != nil {
return fmt.Errorf("must specify valid value for log opt '%s': %v", logCreateGroupKey, err)
}
}
if cfg[forceFlushIntervalKey] != "" {
if value, err := strconv.Atoi(cfg[forceFlushIntervalKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", forceFlushIntervalKey, cfg[forceFlushIntervalKey])
}
}
if cfg[maxBufferedEventsKey] != "" {
if value, err := strconv.Atoi(cfg[maxBufferedEventsKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", maxBufferedEventsKey, cfg[maxBufferedEventsKey])
}
}
_, datetimeFormatKeyExists := cfg[datetimeFormatKey]
_, multilinePatternKeyExists := cfg[multilinePatternKey]
if datetimeFormatKeyExists && multilinePatternKeyExists {
return fmt.Errorf("you cannot configure log opt '%s' and '%s' at the same time", datetimeFormatKey, multilinePatternKey)
}
return nil
}
// Len returns the length of a byTimestamp slice. Len is required by the
// sort.Interface interface.
func (slice byTimestamp) Len() int {
return len(slice)
}
// Less compares two values in a byTimestamp slice by Timestamp. Less is
// required by the sort.Interface interface.
func (slice byTimestamp) Less(i, j int) bool {
iTimestamp, jTimestamp := int64(0), int64(0)
if slice != nil && slice[i].inputLogEvent.Timestamp != nil {
iTimestamp = *slice[i].inputLogEvent.Timestamp
}
if slice != nil && slice[j].inputLogEvent.Timestamp != nil {
jTimestamp = *slice[j].inputLogEvent.Timestamp
}
if iTimestamp == jTimestamp {
return slice[i].insertOrder < slice[j].insertOrder
}
return iTimestamp < jTimestamp
}
// Swap swaps two values in a byTimestamp slice with each other. Swap is
// required by the sort.Interface interface.
func (slice byTimestamp) Swap(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
func unwrapEvents(events []wrappedEvent) []*cloudwatchlogs.InputLogEvent {
cwEvents := make([]*cloudwatchlogs.InputLogEvent, len(events))
for i, input := range events {
cwEvents[i] = input.inputLogEvent
}
return cwEvents
}
func newEventBatch() *eventBatch {
return &eventBatch{
batch: make([]wrappedEvent, 0),
bytes: 0,
}
}
// events returns a slice of wrappedEvents sorted in order of their
// timestamps and then by their insertion order (see `byTimestamp`).
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) events() []wrappedEvent {
sort.Sort(byTimestamp(b.batch))
return b.batch
}
// add adds an event to the batch of events accounting for the
// necessary overhead for an event to be logged. An error will be
// returned if the event cannot be added to the batch due to service
// limits.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) add(event wrappedEvent, size int) bool {
addBytes := size + perEventBytes
// verify we are still within service limits
switch {
case len(b.batch)+1 > maximumLogEventsPerPut:
return false
case b.bytes+addBytes > maximumBytesPerPut:
return false
}
b.bytes += addBytes
b.batch = append(b.batch, event)
return true
}
// count is the number of batched events. Warning: this method
// is not threadsafe and must not be used concurrently.
func (b *eventBatch) count() int {
return len(b.batch)
}
// size is the total number of bytes that the batch represents.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) size() int {
return b.bytes
}
func (b *eventBatch) isEmpty() bool {
zeroEvents := b.count() == 0
zeroSize := b.size() == 0
return zeroEvents && zeroSize
}
// reset prepares the batch for reuse.
func (b *eventBatch) reset() {
b.bytes = 0
b.batch = b.batch[:0]
}
| kzys | 0456e058d2b60606d4374cd975c635dfe7673f17 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | The type isn't exported. | cpuguy83 | 5,043 |
moby/moby | 41,909 | Handle long log messages correctly on SizedLogger | Loggers that implement BufSize() (e.g. awslogs) uses the method to
tell Copier about the maximum log line length. However loggerWithCache
and RingBuffer hide the method by wrapping loggers.
As a result, Copier uses its default 16KB limit which breaks log
lines > 16kB even the destinations can handle that.
This change implements BufSize() on loggerWithCache and RingBuffer to
make sure these logger wrappes don't hide the method on the underlying
loggers.
Fixes #41794.
Signed-off-by: Kazuyoshi Kato <[email protected]>
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
I've added BufSize() to loggerWithCache and RingLogger to make Copier aware about the size limit of the underlying loggers.
**- How I did it**
I've added the method to the structs.
**- How to verify it**
I built Docker and tested the change with `log-split` container image I made.
```
docker run -d --log-driver=awslogs --log-opt mode=non-blocking --log-opt awslogs-group="log-split-test" --log-opt awslogs-region=us-west-2 log-split:latest
```
The Dockerfile for the image is below.
```
FROM ubuntu:18.04
CMD tr -dc A-Za-z0-9 </dev/urandom | head -c 17000; echo ''
```
I also added new unit tests on Copier.
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Fix loggers to make sure they don't break long lines when the destinations' limits allow.
**- A picture of a cute animal (not mandatory but encouraged)**
(From https://www.zoo.org/animals/digital)
| null | 2021-01-20 23:13:00+00:00 | 2021-01-21 13:16:47+00:00 | daemon/logger/awslogs/cloudwatchlogs.go | // Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
package awslogs // import "github.com/docker/docker/daemon/logger/awslogs"
import (
"fmt"
"os"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
"unicode/utf8"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials/endpointcreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/logger/loggerutils"
"github.com/docker/docker/dockerversion"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
name = "awslogs"
regionKey = "awslogs-region"
endpointKey = "awslogs-endpoint"
regionEnvKey = "AWS_REGION"
logGroupKey = "awslogs-group"
logStreamKey = "awslogs-stream"
logCreateGroupKey = "awslogs-create-group"
tagKey = "tag"
datetimeFormatKey = "awslogs-datetime-format"
multilinePatternKey = "awslogs-multiline-pattern"
credentialsEndpointKey = "awslogs-credentials-endpoint"
forceFlushIntervalKey = "awslogs-force-flush-interval-seconds"
maxBufferedEventsKey = "awslogs-max-buffered-events"
defaultForceFlushInterval = 5 * time.Second
defaultMaxBufferedEvents = 4096
// See: http://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html
perEventBytes = 26
maximumBytesPerPut = 1048576
maximumLogEventsPerPut = 10000
// See: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_limits.html
// Because the events are interpreted as UTF-8 encoded Unicode, invalid UTF-8 byte sequences are replaced with the
// Unicode replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To compensate for that and to avoid
// splitting valid UTF-8 characters into invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
maximumBytesPerEvent = 262144 - perEventBytes
resourceAlreadyExistsCode = "ResourceAlreadyExistsException"
dataAlreadyAcceptedCode = "DataAlreadyAcceptedException"
invalidSequenceTokenCode = "InvalidSequenceTokenException"
resourceNotFoundCode = "ResourceNotFoundException"
credentialsEndpoint = "http://169.254.170.2"
userAgentHeader = "User-Agent"
)
type logStream struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
multilinePattern *regexp.Regexp
client api
messages chan *logger.Message
lock sync.RWMutex
closed bool
sequenceToken *string
}
type logStreamConfig struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
maxBufferedEvents int
multilinePattern *regexp.Regexp
}
var _ logger.SizedLogger = &logStream{}
type api interface {
CreateLogGroup(*cloudwatchlogs.CreateLogGroupInput) (*cloudwatchlogs.CreateLogGroupOutput, error)
CreateLogStream(*cloudwatchlogs.CreateLogStreamInput) (*cloudwatchlogs.CreateLogStreamOutput, error)
PutLogEvents(*cloudwatchlogs.PutLogEventsInput) (*cloudwatchlogs.PutLogEventsOutput, error)
}
type regionFinder interface {
Region() (string, error)
}
type wrappedEvent struct {
inputLogEvent *cloudwatchlogs.InputLogEvent
insertOrder int
}
type byTimestamp []wrappedEvent
// init registers the awslogs driver
func init() {
if err := logger.RegisterLogDriver(name, New); err != nil {
logrus.Fatal(err)
}
if err := logger.RegisterLogOptValidator(name, ValidateLogOpt); err != nil {
logrus.Fatal(err)
}
}
// eventBatch holds the events that are batched for submission and the
// associated data about it.
//
// Warning: this type is not threadsafe and must not be used
// concurrently. This type is expected to be consumed in a single go
// routine and never concurrently.
type eventBatch struct {
batch []wrappedEvent
bytes int
}
// New creates an awslogs logger using the configuration passed in on the
// context. Supported context configuration variables are awslogs-region,
// awslogs-endpoint, awslogs-group, awslogs-stream, awslogs-create-group,
// awslogs-multiline-pattern and awslogs-datetime-format.
// When available, configuration is also taken from environment variables
// AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, the shared credentials
// file (~/.aws/credentials), and the EC2 Instance Metadata Service.
func New(info logger.Info) (logger.Logger, error) {
containerStreamConfig, err := newStreamConfig(info)
if err != nil {
return nil, err
}
client, err := newAWSLogsClient(info)
if err != nil {
return nil, err
}
containerStream := &logStream{
logStreamName: containerStreamConfig.logStreamName,
logGroupName: containerStreamConfig.logGroupName,
logCreateGroup: containerStreamConfig.logCreateGroup,
logNonBlocking: containerStreamConfig.logNonBlocking,
forceFlushInterval: containerStreamConfig.forceFlushInterval,
multilinePattern: containerStreamConfig.multilinePattern,
client: client,
messages: make(chan *logger.Message, containerStreamConfig.maxBufferedEvents),
}
creationDone := make(chan bool)
if containerStream.logNonBlocking {
go func() {
backoff := 1
maxBackoff := 32
for {
// If logger is closed we are done
containerStream.lock.RLock()
if containerStream.closed {
containerStream.lock.RUnlock()
break
}
containerStream.lock.RUnlock()
err := containerStream.create()
if err == nil {
break
}
time.Sleep(time.Duration(backoff) * time.Second)
if backoff < maxBackoff {
backoff *= 2
}
logrus.
WithError(err).
WithField("container-id", info.ContainerID).
WithField("container-name", info.ContainerName).
Error("Error while trying to initialize awslogs. Retrying in: ", backoff, " seconds")
}
close(creationDone)
}()
} else {
if err = containerStream.create(); err != nil {
return nil, err
}
close(creationDone)
}
go containerStream.collectBatch(creationDone)
return containerStream, nil
}
// Parses most of the awslogs- options and prepares a config object to be used for newing the actual stream
// It has been formed out to ease Utest of the New above
func newStreamConfig(info logger.Info) (*logStreamConfig, error) {
logGroupName := info.Config[logGroupKey]
logStreamName, err := loggerutils.ParseLogTag(info, "{{.FullID}}")
if err != nil {
return nil, err
}
logCreateGroup := false
if info.Config[logCreateGroupKey] != "" {
logCreateGroup, err = strconv.ParseBool(info.Config[logCreateGroupKey])
if err != nil {
return nil, err
}
}
logNonBlocking := info.Config["mode"] == "non-blocking"
forceFlushInterval := defaultForceFlushInterval
if info.Config[forceFlushIntervalKey] != "" {
forceFlushIntervalAsInt, err := strconv.Atoi(info.Config[forceFlushIntervalKey])
if err != nil {
return nil, err
}
forceFlushInterval = time.Duration(forceFlushIntervalAsInt) * time.Second
}
maxBufferedEvents := int(defaultMaxBufferedEvents)
if info.Config[maxBufferedEventsKey] != "" {
maxBufferedEvents, err = strconv.Atoi(info.Config[maxBufferedEventsKey])
if err != nil {
return nil, err
}
}
if info.Config[logStreamKey] != "" {
logStreamName = info.Config[logStreamKey]
}
multilinePattern, err := parseMultilineOptions(info)
if err != nil {
return nil, err
}
containerStreamConfig := &logStreamConfig{
logStreamName: logStreamName,
logGroupName: logGroupName,
logCreateGroup: logCreateGroup,
logNonBlocking: logNonBlocking,
forceFlushInterval: forceFlushInterval,
maxBufferedEvents: maxBufferedEvents,
multilinePattern: multilinePattern,
}
return containerStreamConfig, nil
}
// Parses awslogs-multiline-pattern and awslogs-datetime-format options
// If awslogs-datetime-format is present, convert the format from strftime
// to regexp and return.
// If awslogs-multiline-pattern is present, compile regexp and return
func parseMultilineOptions(info logger.Info) (*regexp.Regexp, error) {
dateTimeFormat := info.Config[datetimeFormatKey]
multilinePatternKey := info.Config[multilinePatternKey]
// strftime input is parsed into a regular expression
if dateTimeFormat != "" {
// %. matches each strftime format sequence and ReplaceAllStringFunc
// looks up each format sequence in the conversion table strftimeToRegex
// to replace with a defined regular expression
r := regexp.MustCompile("%.")
multilinePatternKey = r.ReplaceAllStringFunc(dateTimeFormat, func(s string) string {
return strftimeToRegex[s]
})
}
if multilinePatternKey != "" {
multilinePattern, err := regexp.Compile(multilinePatternKey)
if err != nil {
return nil, errors.Wrapf(err, "awslogs could not parse multiline pattern key %q", multilinePatternKey)
}
return multilinePattern, nil
}
return nil, nil
}
// Maps strftime format strings to regex
var strftimeToRegex = map[string]string{
/*weekdayShort */ `%a`: `(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)`,
/*weekdayFull */ `%A`: `(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)`,
/*weekdayZeroIndex */ `%w`: `[0-6]`,
/*dayZeroPadded */ `%d`: `(?:0[1-9]|[1,2][0-9]|3[0,1])`,
/*monthShort */ `%b`: `(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)`,
/*monthFull */ `%B`: `(?:January|February|March|April|May|June|July|August|September|October|November|December)`,
/*monthZeroPadded */ `%m`: `(?:0[1-9]|1[0-2])`,
/*yearCentury */ `%Y`: `\d{4}`,
/*yearZeroPadded */ `%y`: `\d{2}`,
/*hour24ZeroPadded */ `%H`: `(?:[0,1][0-9]|2[0-3])`,
/*hour12ZeroPadded */ `%I`: `(?:0[0-9]|1[0-2])`,
/*AM or PM */ `%p`: "[A,P]M",
/*minuteZeroPadded */ `%M`: `[0-5][0-9]`,
/*secondZeroPadded */ `%S`: `[0-5][0-9]`,
/*microsecondZeroPadded */ `%f`: `\d{6}`,
/*utcOffset */ `%z`: `[+-]\d{4}`,
/*tzName */ `%Z`: `[A-Z]{1,4}T`,
/*dayOfYearZeroPadded */ `%j`: `(?:0[0-9][1-9]|[1,2][0-9][0-9]|3[0-5][0-9]|36[0-6])`,
/*milliseconds */ `%L`: `\.\d{3}`,
}
// newRegionFinder is a variable such that the implementation
// can be swapped out for unit tests.
var newRegionFinder = func() (regionFinder, error) {
s, err := session.NewSession()
if err != nil {
return nil, err
}
return ec2metadata.New(s), nil
}
// newSDKEndpoint is a variable such that the implementation
// can be swapped out for unit tests.
var newSDKEndpoint = credentialsEndpoint
// newAWSLogsClient creates the service client for Amazon CloudWatch Logs.
// Customizations to the default client from the SDK include a Docker-specific
// User-Agent string and automatic region detection using the EC2 Instance
// Metadata Service when region is otherwise unspecified.
func newAWSLogsClient(info logger.Info) (api, error) {
var region, endpoint *string
if os.Getenv(regionEnvKey) != "" {
region = aws.String(os.Getenv(regionEnvKey))
}
if info.Config[regionKey] != "" {
region = aws.String(info.Config[regionKey])
}
if info.Config[endpointKey] != "" {
endpoint = aws.String(info.Config[endpointKey])
}
if region == nil || *region == "" {
logrus.Info("Trying to get region from EC2 Metadata")
ec2MetadataClient, err := newRegionFinder()
if err != nil {
logrus.WithError(err).Error("could not create EC2 metadata client")
return nil, errors.Wrap(err, "could not create EC2 metadata client")
}
r, err := ec2MetadataClient.Region()
if err != nil {
logrus.WithError(err).Error("Could not get region from EC2 metadata, environment, or log option")
return nil, errors.New("Cannot determine region for awslogs driver")
}
region = &r
}
sess, err := session.NewSession()
if err != nil {
return nil, errors.New("Failed to create a service client session for awslogs driver")
}
// attach region to cloudwatchlogs config
sess.Config.Region = region
// attach endpoint to cloudwatchlogs config
if endpoint != nil {
sess.Config.Endpoint = endpoint
}
if uri, ok := info.Config[credentialsEndpointKey]; ok {
logrus.Debugf("Trying to get credentials from awslogs-credentials-endpoint")
endpoint := fmt.Sprintf("%s%s", newSDKEndpoint, uri)
creds := endpointcreds.NewCredentialsClient(*sess.Config, sess.Handlers, endpoint,
func(p *endpointcreds.Provider) {
p.ExpiryWindow = 5 * time.Minute
})
// attach credentials to cloudwatchlogs config
sess.Config.Credentials = creds
}
logrus.WithFields(logrus.Fields{
"region": *region,
}).Debug("Created awslogs client")
client := cloudwatchlogs.New(sess)
client.Handlers.Build.PushBackNamed(request.NamedHandler{
Name: "DockerUserAgentHandler",
Fn: func(r *request.Request) {
currentAgent := r.HTTPRequest.Header.Get(userAgentHeader)
r.HTTPRequest.Header.Set(userAgentHeader,
fmt.Sprintf("Docker %s (%s) %s",
dockerversion.Version, runtime.GOOS, currentAgent))
},
})
return client, nil
}
// Name returns the name of the awslogs logging driver
func (l *logStream) Name() string {
return name
}
func (l *logStream) BufSize() int {
return maximumBytesPerEvent
}
// Log submits messages for logging by an instance of the awslogs logging driver
func (l *logStream) Log(msg *logger.Message) error {
l.lock.RLock()
defer l.lock.RUnlock()
if l.closed {
return errors.New("awslogs is closed")
}
if l.logNonBlocking {
select {
case l.messages <- msg:
return nil
default:
return errors.New("awslogs buffer is full")
}
}
l.messages <- msg
return nil
}
// Close closes the instance of the awslogs logging driver
func (l *logStream) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if !l.closed {
close(l.messages)
}
l.closed = true
return nil
}
// create creates log group and log stream for the instance of the awslogs logging driver
func (l *logStream) create() error {
err := l.createLogStream()
if err == nil {
return nil
}
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == resourceNotFoundCode && l.logCreateGroup {
if err := l.createLogGroup(); err != nil {
return errors.Wrap(err, "failed to create Cloudwatch log group")
}
err = l.createLogStream()
if err == nil {
return nil
}
}
return errors.Wrap(err, "failed to create Cloudwatch log stream")
}
// createLogGroup creates a log group for the instance of the awslogs logging driver
func (l *logStream) createLogGroup() error {
if _, err := l.client.CreateLogGroup(&cloudwatchlogs.CreateLogGroupInput{
LogGroupName: aws.String(l.logGroupName),
}); err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logCreateGroup": l.logCreateGroup,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log group already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log group")
}
return err
}
return nil
}
// createLogStream creates a log stream for the instance of the awslogs logging driver
func (l *logStream) createLogStream() error {
input := &cloudwatchlogs.CreateLogStreamInput{
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
_, err := l.client.CreateLogStream(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log stream already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log stream")
}
}
return err
}
// newTicker is used for time-based batching. newTicker is a variable such
// that the implementation can be swapped out for unit tests.
var newTicker = func(freq time.Duration) *time.Ticker {
return time.NewTicker(freq)
}
// collectBatch executes as a goroutine to perform batching of log events for
// submission to the log stream. If the awslogs-multiline-pattern or
// awslogs-datetime-format options have been configured, multiline processing
// is enabled, where log messages are stored in an event buffer until a multiline
// pattern match is found, at which point the messages in the event buffer are
// pushed to CloudWatch logs as a single log event. Multiline messages are processed
// according to the maximumBytesPerPut constraint, and the implementation only
// allows for messages to be buffered for a maximum of 2*batchPublishFrequency
// seconds. When events are ready to be processed for submission to CloudWatch
// Logs, the processEvents method is called. If a multiline pattern is not
// configured, log events are submitted to the processEvents method immediately.
func (l *logStream) collectBatch(created chan bool) {
// Wait for the logstream/group to be created
<-created
flushInterval := l.forceFlushInterval
if flushInterval <= 0 {
flushInterval = defaultForceFlushInterval
}
ticker := newTicker(flushInterval)
var eventBuffer []byte
var eventBufferTimestamp int64
var batch = newEventBatch()
for {
select {
case t := <-ticker.C:
// If event buffer is older than batch publish frequency flush the event buffer
if eventBufferTimestamp > 0 && len(eventBuffer) > 0 {
eventBufferAge := t.UnixNano()/int64(time.Millisecond) - eventBufferTimestamp
eventBufferExpired := eventBufferAge >= int64(flushInterval)/int64(time.Millisecond)
eventBufferNegative := eventBufferAge < 0
if eventBufferExpired || eventBufferNegative {
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBuffer = eventBuffer[:0]
}
}
l.publishBatch(batch)
batch.reset()
case msg, more := <-l.messages:
if !more {
// Flush event buffer and release resources
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
l.publishBatch(batch)
batch.reset()
return
}
if eventBufferTimestamp == 0 {
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
}
line := msg.Line
if l.multilinePattern != nil {
lineEffectiveLen := effectiveLen(string(line))
if l.multilinePattern.Match(line) || effectiveLen(string(eventBuffer))+lineEffectiveLen > maximumBytesPerEvent {
// This is a new log event or we will exceed max bytes per event
// so flush the current eventBuffer to events and reset timestamp
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
eventBuffer = eventBuffer[:0]
}
// Append newline if event is less than max event size
if lineEffectiveLen < maximumBytesPerEvent {
line = append(line, "\n"...)
}
eventBuffer = append(eventBuffer, line...)
logger.PutMessage(msg)
} else {
l.processEvent(batch, line, msg.Timestamp.UnixNano()/int64(time.Millisecond))
logger.PutMessage(msg)
}
}
}
}
// processEvent processes log events that are ready for submission to CloudWatch
// logs. Batching is performed on time- and size-bases. Time-based batching
// occurs at a 5 second interval (defined in the batchPublishFrequency const).
// Size-based batching is performed on the maximum number of events per batch
// (defined in maximumLogEventsPerPut) and the maximum number of total bytes in a
// batch (defined in maximumBytesPerPut). Log messages are split by the maximum
// bytes per event (defined in maximumBytesPerEvent). There is a fixed per-event
// byte overhead (defined in perEventBytes) which is accounted for in split- and
// batch-calculations. Because the events are interpreted as UTF-8 encoded
// Unicode, invalid UTF-8 byte sequences are replaced with the Unicode
// replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To
// compensate for that and to avoid splitting valid UTF-8 characters into
// invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
func (l *logStream) processEvent(batch *eventBatch, bytes []byte, timestamp int64) {
for len(bytes) > 0 {
// Split line length so it does not exceed the maximum
splitOffset, lineBytes := findValidSplit(string(bytes), maximumBytesPerEvent)
line := bytes[:splitOffset]
event := wrappedEvent{
inputLogEvent: &cloudwatchlogs.InputLogEvent{
Message: aws.String(string(line)),
Timestamp: aws.Int64(timestamp),
},
insertOrder: batch.count(),
}
added := batch.add(event, lineBytes)
if added {
bytes = bytes[splitOffset:]
} else {
l.publishBatch(batch)
batch.reset()
}
}
}
// effectiveLen counts the effective number of bytes in the string, after
// UTF-8 normalization. UTF-8 normalization includes replacing bytes that do
// not constitute valid UTF-8 encoded Unicode codepoints with the Unicode
// replacement codepoint U+FFFD (a 3-byte UTF-8 sequence, represented in Go as
// utf8.RuneError)
func effectiveLen(line string) int {
effectiveBytes := 0
for _, rune := range line {
effectiveBytes += utf8.RuneLen(rune)
}
return effectiveBytes
}
// findValidSplit finds the byte offset to split a string without breaking valid
// Unicode codepoints given a maximum number of total bytes. findValidSplit
// returns the byte offset for splitting a string or []byte, as well as the
// effective number of bytes if the string were normalized to replace invalid
// UTF-8 encoded bytes with the Unicode replacement character (a 3-byte UTF-8
// sequence, represented in Go as utf8.RuneError)
func findValidSplit(line string, maxBytes int) (splitOffset, effectiveBytes int) {
for offset, rune := range line {
splitOffset = offset
if effectiveBytes+utf8.RuneLen(rune) > maxBytes {
return splitOffset, effectiveBytes
}
effectiveBytes += utf8.RuneLen(rune)
}
splitOffset = len(line)
return
}
// publishBatch calls PutLogEvents for a given set of InputLogEvents,
// accounting for sequencing requirements (each request must reference the
// sequence token returned by the previous request).
func (l *logStream) publishBatch(batch *eventBatch) {
if batch.isEmpty() {
return
}
cwEvents := unwrapEvents(batch.events())
nextSequenceToken, err := l.putLogEvents(cwEvents, l.sequenceToken)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == dataAlreadyAcceptedCode {
// already submitted, just grab the correct sequence token
parts := strings.Split(awsErr.Message(), " ")
nextSequenceToken = &parts[len(parts)-1]
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Info("Data already accepted, ignoring error")
err = nil
} else if awsErr.Code() == invalidSequenceTokenCode {
// sequence code is bad, grab the correct one and retry
parts := strings.Split(awsErr.Message(), " ")
token := parts[len(parts)-1]
nextSequenceToken, err = l.putLogEvents(cwEvents, &token)
}
}
}
if err != nil {
logrus.Error(err)
} else {
l.sequenceToken = nextSequenceToken
}
}
// putLogEvents wraps the PutLogEvents API
func (l *logStream) putLogEvents(events []*cloudwatchlogs.InputLogEvent, sequenceToken *string) (*string, error) {
input := &cloudwatchlogs.PutLogEventsInput{
LogEvents: events,
SequenceToken: sequenceToken,
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
resp, err := l.client.PutLogEvents(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Error("Failed to put log events")
}
return nil, err
}
return resp.NextSequenceToken, nil
}
// ValidateLogOpt looks for awslogs-specific log options awslogs-region, awslogs-endpoint
// awslogs-group, awslogs-stream, awslogs-create-group, awslogs-datetime-format,
// awslogs-multiline-pattern
func ValidateLogOpt(cfg map[string]string) error {
for key := range cfg {
switch key {
case logGroupKey:
case logStreamKey:
case logCreateGroupKey:
case regionKey:
case endpointKey:
case tagKey:
case datetimeFormatKey:
case multilinePatternKey:
case credentialsEndpointKey:
case forceFlushIntervalKey:
case maxBufferedEventsKey:
default:
return fmt.Errorf("unknown log opt '%s' for %s log driver", key, name)
}
}
if cfg[logGroupKey] == "" {
return fmt.Errorf("must specify a value for log opt '%s'", logGroupKey)
}
if cfg[logCreateGroupKey] != "" {
if _, err := strconv.ParseBool(cfg[logCreateGroupKey]); err != nil {
return fmt.Errorf("must specify valid value for log opt '%s': %v", logCreateGroupKey, err)
}
}
if cfg[forceFlushIntervalKey] != "" {
if value, err := strconv.Atoi(cfg[forceFlushIntervalKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", forceFlushIntervalKey, cfg[forceFlushIntervalKey])
}
}
if cfg[maxBufferedEventsKey] != "" {
if value, err := strconv.Atoi(cfg[maxBufferedEventsKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", maxBufferedEventsKey, cfg[maxBufferedEventsKey])
}
}
_, datetimeFormatKeyExists := cfg[datetimeFormatKey]
_, multilinePatternKeyExists := cfg[multilinePatternKey]
if datetimeFormatKeyExists && multilinePatternKeyExists {
return fmt.Errorf("you cannot configure log opt '%s' and '%s' at the same time", datetimeFormatKey, multilinePatternKey)
}
return nil
}
// Len returns the length of a byTimestamp slice. Len is required by the
// sort.Interface interface.
func (slice byTimestamp) Len() int {
return len(slice)
}
// Less compares two values in a byTimestamp slice by Timestamp. Less is
// required by the sort.Interface interface.
func (slice byTimestamp) Less(i, j int) bool {
iTimestamp, jTimestamp := int64(0), int64(0)
if slice != nil && slice[i].inputLogEvent.Timestamp != nil {
iTimestamp = *slice[i].inputLogEvent.Timestamp
}
if slice != nil && slice[j].inputLogEvent.Timestamp != nil {
jTimestamp = *slice[j].inputLogEvent.Timestamp
}
if iTimestamp == jTimestamp {
return slice[i].insertOrder < slice[j].insertOrder
}
return iTimestamp < jTimestamp
}
// Swap swaps two values in a byTimestamp slice with each other. Swap is
// required by the sort.Interface interface.
func (slice byTimestamp) Swap(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
func unwrapEvents(events []wrappedEvent) []*cloudwatchlogs.InputLogEvent {
cwEvents := make([]*cloudwatchlogs.InputLogEvent, len(events))
for i, input := range events {
cwEvents[i] = input.inputLogEvent
}
return cwEvents
}
func newEventBatch() *eventBatch {
return &eventBatch{
batch: make([]wrappedEvent, 0),
bytes: 0,
}
}
// events returns a slice of wrappedEvents sorted in order of their
// timestamps and then by their insertion order (see `byTimestamp`).
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) events() []wrappedEvent {
sort.Sort(byTimestamp(b.batch))
return b.batch
}
// add adds an event to the batch of events accounting for the
// necessary overhead for an event to be logged. An error will be
// returned if the event cannot be added to the batch due to service
// limits.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) add(event wrappedEvent, size int) bool {
addBytes := size + perEventBytes
// verify we are still within service limits
switch {
case len(b.batch)+1 > maximumLogEventsPerPut:
return false
case b.bytes+addBytes > maximumBytesPerPut:
return false
}
b.bytes += addBytes
b.batch = append(b.batch, event)
return true
}
// count is the number of batched events. Warning: this method
// is not threadsafe and must not be used concurrently.
func (b *eventBatch) count() int {
return len(b.batch)
}
// size is the total number of bytes that the batch represents.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) size() int {
return b.bytes
}
func (b *eventBatch) isEmpty() bool {
zeroEvents := b.count() == 0
zeroSize := b.size() == 0
return zeroEvents && zeroSize
}
// reset prepares the batch for reuse.
func (b *eventBatch) reset() {
b.bytes = 0
b.batch = b.batch[:0]
}
| // Package awslogs provides the logdriver for forwarding container logs to Amazon CloudWatch Logs
package awslogs // import "github.com/docker/docker/daemon/logger/awslogs"
import (
"fmt"
"os"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
"unicode/utf8"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials/endpointcreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/docker/docker/daemon/logger"
"github.com/docker/docker/daemon/logger/loggerutils"
"github.com/docker/docker/dockerversion"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
name = "awslogs"
regionKey = "awslogs-region"
endpointKey = "awslogs-endpoint"
regionEnvKey = "AWS_REGION"
logGroupKey = "awslogs-group"
logStreamKey = "awslogs-stream"
logCreateGroupKey = "awslogs-create-group"
tagKey = "tag"
datetimeFormatKey = "awslogs-datetime-format"
multilinePatternKey = "awslogs-multiline-pattern"
credentialsEndpointKey = "awslogs-credentials-endpoint"
forceFlushIntervalKey = "awslogs-force-flush-interval-seconds"
maxBufferedEventsKey = "awslogs-max-buffered-events"
defaultForceFlushInterval = 5 * time.Second
defaultMaxBufferedEvents = 4096
// See: http://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutLogEvents.html
perEventBytes = 26
maximumBytesPerPut = 1048576
maximumLogEventsPerPut = 10000
// See: http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_limits.html
// Because the events are interpreted as UTF-8 encoded Unicode, invalid UTF-8 byte sequences are replaced with the
// Unicode replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To compensate for that and to avoid
// splitting valid UTF-8 characters into invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
maximumBytesPerEvent = 262144 - perEventBytes
resourceAlreadyExistsCode = "ResourceAlreadyExistsException"
dataAlreadyAcceptedCode = "DataAlreadyAcceptedException"
invalidSequenceTokenCode = "InvalidSequenceTokenException"
resourceNotFoundCode = "ResourceNotFoundException"
credentialsEndpoint = "http://169.254.170.2"
userAgentHeader = "User-Agent"
)
type logStream struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
multilinePattern *regexp.Regexp
client api
messages chan *logger.Message
lock sync.RWMutex
closed bool
sequenceToken *string
}
type logStreamConfig struct {
logStreamName string
logGroupName string
logCreateGroup bool
logNonBlocking bool
forceFlushInterval time.Duration
maxBufferedEvents int
multilinePattern *regexp.Regexp
}
var _ logger.SizedLogger = &logStream{}
type api interface {
CreateLogGroup(*cloudwatchlogs.CreateLogGroupInput) (*cloudwatchlogs.CreateLogGroupOutput, error)
CreateLogStream(*cloudwatchlogs.CreateLogStreamInput) (*cloudwatchlogs.CreateLogStreamOutput, error)
PutLogEvents(*cloudwatchlogs.PutLogEventsInput) (*cloudwatchlogs.PutLogEventsOutput, error)
}
type regionFinder interface {
Region() (string, error)
}
type wrappedEvent struct {
inputLogEvent *cloudwatchlogs.InputLogEvent
insertOrder int
}
type byTimestamp []wrappedEvent
// init registers the awslogs driver
func init() {
if err := logger.RegisterLogDriver(name, New); err != nil {
logrus.Fatal(err)
}
if err := logger.RegisterLogOptValidator(name, ValidateLogOpt); err != nil {
logrus.Fatal(err)
}
}
// eventBatch holds the events that are batched for submission and the
// associated data about it.
//
// Warning: this type is not threadsafe and must not be used
// concurrently. This type is expected to be consumed in a single go
// routine and never concurrently.
type eventBatch struct {
batch []wrappedEvent
bytes int
}
// New creates an awslogs logger using the configuration passed in on the
// context. Supported context configuration variables are awslogs-region,
// awslogs-endpoint, awslogs-group, awslogs-stream, awslogs-create-group,
// awslogs-multiline-pattern and awslogs-datetime-format.
// When available, configuration is also taken from environment variables
// AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, the shared credentials
// file (~/.aws/credentials), and the EC2 Instance Metadata Service.
func New(info logger.Info) (logger.Logger, error) {
containerStreamConfig, err := newStreamConfig(info)
if err != nil {
return nil, err
}
client, err := newAWSLogsClient(info)
if err != nil {
return nil, err
}
containerStream := &logStream{
logStreamName: containerStreamConfig.logStreamName,
logGroupName: containerStreamConfig.logGroupName,
logCreateGroup: containerStreamConfig.logCreateGroup,
logNonBlocking: containerStreamConfig.logNonBlocking,
forceFlushInterval: containerStreamConfig.forceFlushInterval,
multilinePattern: containerStreamConfig.multilinePattern,
client: client,
messages: make(chan *logger.Message, containerStreamConfig.maxBufferedEvents),
}
creationDone := make(chan bool)
if containerStream.logNonBlocking {
go func() {
backoff := 1
maxBackoff := 32
for {
// If logger is closed we are done
containerStream.lock.RLock()
if containerStream.closed {
containerStream.lock.RUnlock()
break
}
containerStream.lock.RUnlock()
err := containerStream.create()
if err == nil {
break
}
time.Sleep(time.Duration(backoff) * time.Second)
if backoff < maxBackoff {
backoff *= 2
}
logrus.
WithError(err).
WithField("container-id", info.ContainerID).
WithField("container-name", info.ContainerName).
Error("Error while trying to initialize awslogs. Retrying in: ", backoff, " seconds")
}
close(creationDone)
}()
} else {
if err = containerStream.create(); err != nil {
return nil, err
}
close(creationDone)
}
go containerStream.collectBatch(creationDone)
return containerStream, nil
}
// Parses most of the awslogs- options and prepares a config object to be used for newing the actual stream
// It has been formed out to ease Utest of the New above
func newStreamConfig(info logger.Info) (*logStreamConfig, error) {
logGroupName := info.Config[logGroupKey]
logStreamName, err := loggerutils.ParseLogTag(info, "{{.FullID}}")
if err != nil {
return nil, err
}
logCreateGroup := false
if info.Config[logCreateGroupKey] != "" {
logCreateGroup, err = strconv.ParseBool(info.Config[logCreateGroupKey])
if err != nil {
return nil, err
}
}
logNonBlocking := info.Config["mode"] == "non-blocking"
forceFlushInterval := defaultForceFlushInterval
if info.Config[forceFlushIntervalKey] != "" {
forceFlushIntervalAsInt, err := strconv.Atoi(info.Config[forceFlushIntervalKey])
if err != nil {
return nil, err
}
forceFlushInterval = time.Duration(forceFlushIntervalAsInt) * time.Second
}
maxBufferedEvents := int(defaultMaxBufferedEvents)
if info.Config[maxBufferedEventsKey] != "" {
maxBufferedEvents, err = strconv.Atoi(info.Config[maxBufferedEventsKey])
if err != nil {
return nil, err
}
}
if info.Config[logStreamKey] != "" {
logStreamName = info.Config[logStreamKey]
}
multilinePattern, err := parseMultilineOptions(info)
if err != nil {
return nil, err
}
containerStreamConfig := &logStreamConfig{
logStreamName: logStreamName,
logGroupName: logGroupName,
logCreateGroup: logCreateGroup,
logNonBlocking: logNonBlocking,
forceFlushInterval: forceFlushInterval,
maxBufferedEvents: maxBufferedEvents,
multilinePattern: multilinePattern,
}
return containerStreamConfig, nil
}
// Parses awslogs-multiline-pattern and awslogs-datetime-format options
// If awslogs-datetime-format is present, convert the format from strftime
// to regexp and return.
// If awslogs-multiline-pattern is present, compile regexp and return
func parseMultilineOptions(info logger.Info) (*regexp.Regexp, error) {
dateTimeFormat := info.Config[datetimeFormatKey]
multilinePatternKey := info.Config[multilinePatternKey]
// strftime input is parsed into a regular expression
if dateTimeFormat != "" {
// %. matches each strftime format sequence and ReplaceAllStringFunc
// looks up each format sequence in the conversion table strftimeToRegex
// to replace with a defined regular expression
r := regexp.MustCompile("%.")
multilinePatternKey = r.ReplaceAllStringFunc(dateTimeFormat, func(s string) string {
return strftimeToRegex[s]
})
}
if multilinePatternKey != "" {
multilinePattern, err := regexp.Compile(multilinePatternKey)
if err != nil {
return nil, errors.Wrapf(err, "awslogs could not parse multiline pattern key %q", multilinePatternKey)
}
return multilinePattern, nil
}
return nil, nil
}
// Maps strftime format strings to regex
var strftimeToRegex = map[string]string{
/*weekdayShort */ `%a`: `(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun)`,
/*weekdayFull */ `%A`: `(?:Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)`,
/*weekdayZeroIndex */ `%w`: `[0-6]`,
/*dayZeroPadded */ `%d`: `(?:0[1-9]|[1,2][0-9]|3[0,1])`,
/*monthShort */ `%b`: `(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)`,
/*monthFull */ `%B`: `(?:January|February|March|April|May|June|July|August|September|October|November|December)`,
/*monthZeroPadded */ `%m`: `(?:0[1-9]|1[0-2])`,
/*yearCentury */ `%Y`: `\d{4}`,
/*yearZeroPadded */ `%y`: `\d{2}`,
/*hour24ZeroPadded */ `%H`: `(?:[0,1][0-9]|2[0-3])`,
/*hour12ZeroPadded */ `%I`: `(?:0[0-9]|1[0-2])`,
/*AM or PM */ `%p`: "[A,P]M",
/*minuteZeroPadded */ `%M`: `[0-5][0-9]`,
/*secondZeroPadded */ `%S`: `[0-5][0-9]`,
/*microsecondZeroPadded */ `%f`: `\d{6}`,
/*utcOffset */ `%z`: `[+-]\d{4}`,
/*tzName */ `%Z`: `[A-Z]{1,4}T`,
/*dayOfYearZeroPadded */ `%j`: `(?:0[0-9][1-9]|[1,2][0-9][0-9]|3[0-5][0-9]|36[0-6])`,
/*milliseconds */ `%L`: `\.\d{3}`,
}
// newRegionFinder is a variable such that the implementation
// can be swapped out for unit tests.
var newRegionFinder = func() (regionFinder, error) {
s, err := session.NewSession()
if err != nil {
return nil, err
}
return ec2metadata.New(s), nil
}
// newSDKEndpoint is a variable such that the implementation
// can be swapped out for unit tests.
var newSDKEndpoint = credentialsEndpoint
// newAWSLogsClient creates the service client for Amazon CloudWatch Logs.
// Customizations to the default client from the SDK include a Docker-specific
// User-Agent string and automatic region detection using the EC2 Instance
// Metadata Service when region is otherwise unspecified.
func newAWSLogsClient(info logger.Info) (api, error) {
var region, endpoint *string
if os.Getenv(regionEnvKey) != "" {
region = aws.String(os.Getenv(regionEnvKey))
}
if info.Config[regionKey] != "" {
region = aws.String(info.Config[regionKey])
}
if info.Config[endpointKey] != "" {
endpoint = aws.String(info.Config[endpointKey])
}
if region == nil || *region == "" {
logrus.Info("Trying to get region from EC2 Metadata")
ec2MetadataClient, err := newRegionFinder()
if err != nil {
logrus.WithError(err).Error("could not create EC2 metadata client")
return nil, errors.Wrap(err, "could not create EC2 metadata client")
}
r, err := ec2MetadataClient.Region()
if err != nil {
logrus.WithError(err).Error("Could not get region from EC2 metadata, environment, or log option")
return nil, errors.New("Cannot determine region for awslogs driver")
}
region = &r
}
sess, err := session.NewSession()
if err != nil {
return nil, errors.New("Failed to create a service client session for awslogs driver")
}
// attach region to cloudwatchlogs config
sess.Config.Region = region
// attach endpoint to cloudwatchlogs config
if endpoint != nil {
sess.Config.Endpoint = endpoint
}
if uri, ok := info.Config[credentialsEndpointKey]; ok {
logrus.Debugf("Trying to get credentials from awslogs-credentials-endpoint")
endpoint := fmt.Sprintf("%s%s", newSDKEndpoint, uri)
creds := endpointcreds.NewCredentialsClient(*sess.Config, sess.Handlers, endpoint,
func(p *endpointcreds.Provider) {
p.ExpiryWindow = 5 * time.Minute
})
// attach credentials to cloudwatchlogs config
sess.Config.Credentials = creds
}
logrus.WithFields(logrus.Fields{
"region": *region,
}).Debug("Created awslogs client")
client := cloudwatchlogs.New(sess)
client.Handlers.Build.PushBackNamed(request.NamedHandler{
Name: "DockerUserAgentHandler",
Fn: func(r *request.Request) {
currentAgent := r.HTTPRequest.Header.Get(userAgentHeader)
r.HTTPRequest.Header.Set(userAgentHeader,
fmt.Sprintf("Docker %s (%s) %s",
dockerversion.Version, runtime.GOOS, currentAgent))
},
})
return client, nil
}
// Name returns the name of the awslogs logging driver
func (l *logStream) Name() string {
return name
}
// BufSize returns the maximum bytes CloudWatch can handle.
func (l *logStream) BufSize() int {
return maximumBytesPerEvent
}
// Log submits messages for logging by an instance of the awslogs logging driver
func (l *logStream) Log(msg *logger.Message) error {
l.lock.RLock()
defer l.lock.RUnlock()
if l.closed {
return errors.New("awslogs is closed")
}
if l.logNonBlocking {
select {
case l.messages <- msg:
return nil
default:
return errors.New("awslogs buffer is full")
}
}
l.messages <- msg
return nil
}
// Close closes the instance of the awslogs logging driver
func (l *logStream) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if !l.closed {
close(l.messages)
}
l.closed = true
return nil
}
// create creates log group and log stream for the instance of the awslogs logging driver
func (l *logStream) create() error {
err := l.createLogStream()
if err == nil {
return nil
}
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == resourceNotFoundCode && l.logCreateGroup {
if err := l.createLogGroup(); err != nil {
return errors.Wrap(err, "failed to create Cloudwatch log group")
}
err = l.createLogStream()
if err == nil {
return nil
}
}
return errors.Wrap(err, "failed to create Cloudwatch log stream")
}
// createLogGroup creates a log group for the instance of the awslogs logging driver
func (l *logStream) createLogGroup() error {
if _, err := l.client.CreateLogGroup(&cloudwatchlogs.CreateLogGroupInput{
LogGroupName: aws.String(l.logGroupName),
}); err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logCreateGroup": l.logCreateGroup,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log group already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log group")
}
return err
}
return nil
}
// createLogStream creates a log stream for the instance of the awslogs logging driver
func (l *logStream) createLogStream() error {
input := &cloudwatchlogs.CreateLogStreamInput{
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
_, err := l.client.CreateLogStream(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fields := logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}
if awsErr.Code() == resourceAlreadyExistsCode {
// Allow creation to succeed
logrus.WithFields(fields).Info("Log stream already exists")
return nil
}
logrus.WithFields(fields).Error("Failed to create log stream")
}
}
return err
}
// newTicker is used for time-based batching. newTicker is a variable such
// that the implementation can be swapped out for unit tests.
var newTicker = func(freq time.Duration) *time.Ticker {
return time.NewTicker(freq)
}
// collectBatch executes as a goroutine to perform batching of log events for
// submission to the log stream. If the awslogs-multiline-pattern or
// awslogs-datetime-format options have been configured, multiline processing
// is enabled, where log messages are stored in an event buffer until a multiline
// pattern match is found, at which point the messages in the event buffer are
// pushed to CloudWatch logs as a single log event. Multiline messages are processed
// according to the maximumBytesPerPut constraint, and the implementation only
// allows for messages to be buffered for a maximum of 2*batchPublishFrequency
// seconds. When events are ready to be processed for submission to CloudWatch
// Logs, the processEvents method is called. If a multiline pattern is not
// configured, log events are submitted to the processEvents method immediately.
func (l *logStream) collectBatch(created chan bool) {
// Wait for the logstream/group to be created
<-created
flushInterval := l.forceFlushInterval
if flushInterval <= 0 {
flushInterval = defaultForceFlushInterval
}
ticker := newTicker(flushInterval)
var eventBuffer []byte
var eventBufferTimestamp int64
var batch = newEventBatch()
for {
select {
case t := <-ticker.C:
// If event buffer is older than batch publish frequency flush the event buffer
if eventBufferTimestamp > 0 && len(eventBuffer) > 0 {
eventBufferAge := t.UnixNano()/int64(time.Millisecond) - eventBufferTimestamp
eventBufferExpired := eventBufferAge >= int64(flushInterval)/int64(time.Millisecond)
eventBufferNegative := eventBufferAge < 0
if eventBufferExpired || eventBufferNegative {
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBuffer = eventBuffer[:0]
}
}
l.publishBatch(batch)
batch.reset()
case msg, more := <-l.messages:
if !more {
// Flush event buffer and release resources
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
l.publishBatch(batch)
batch.reset()
return
}
if eventBufferTimestamp == 0 {
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
}
line := msg.Line
if l.multilinePattern != nil {
lineEffectiveLen := effectiveLen(string(line))
if l.multilinePattern.Match(line) || effectiveLen(string(eventBuffer))+lineEffectiveLen > maximumBytesPerEvent {
// This is a new log event or we will exceed max bytes per event
// so flush the current eventBuffer to events and reset timestamp
l.processEvent(batch, eventBuffer, eventBufferTimestamp)
eventBufferTimestamp = msg.Timestamp.UnixNano() / int64(time.Millisecond)
eventBuffer = eventBuffer[:0]
}
// Append newline if event is less than max event size
if lineEffectiveLen < maximumBytesPerEvent {
line = append(line, "\n"...)
}
eventBuffer = append(eventBuffer, line...)
logger.PutMessage(msg)
} else {
l.processEvent(batch, line, msg.Timestamp.UnixNano()/int64(time.Millisecond))
logger.PutMessage(msg)
}
}
}
}
// processEvent processes log events that are ready for submission to CloudWatch
// logs. Batching is performed on time- and size-bases. Time-based batching
// occurs at a 5 second interval (defined in the batchPublishFrequency const).
// Size-based batching is performed on the maximum number of events per batch
// (defined in maximumLogEventsPerPut) and the maximum number of total bytes in a
// batch (defined in maximumBytesPerPut). Log messages are split by the maximum
// bytes per event (defined in maximumBytesPerEvent). There is a fixed per-event
// byte overhead (defined in perEventBytes) which is accounted for in split- and
// batch-calculations. Because the events are interpreted as UTF-8 encoded
// Unicode, invalid UTF-8 byte sequences are replaced with the Unicode
// replacement character (U+FFFD), which is a 3-byte sequence in UTF-8. To
// compensate for that and to avoid splitting valid UTF-8 characters into
// invalid byte sequences, we calculate the length of each event assuming that
// this replacement happens.
func (l *logStream) processEvent(batch *eventBatch, bytes []byte, timestamp int64) {
for len(bytes) > 0 {
// Split line length so it does not exceed the maximum
splitOffset, lineBytes := findValidSplit(string(bytes), maximumBytesPerEvent)
line := bytes[:splitOffset]
event := wrappedEvent{
inputLogEvent: &cloudwatchlogs.InputLogEvent{
Message: aws.String(string(line)),
Timestamp: aws.Int64(timestamp),
},
insertOrder: batch.count(),
}
added := batch.add(event, lineBytes)
if added {
bytes = bytes[splitOffset:]
} else {
l.publishBatch(batch)
batch.reset()
}
}
}
// effectiveLen counts the effective number of bytes in the string, after
// UTF-8 normalization. UTF-8 normalization includes replacing bytes that do
// not constitute valid UTF-8 encoded Unicode codepoints with the Unicode
// replacement codepoint U+FFFD (a 3-byte UTF-8 sequence, represented in Go as
// utf8.RuneError)
func effectiveLen(line string) int {
effectiveBytes := 0
for _, rune := range line {
effectiveBytes += utf8.RuneLen(rune)
}
return effectiveBytes
}
// findValidSplit finds the byte offset to split a string without breaking valid
// Unicode codepoints given a maximum number of total bytes. findValidSplit
// returns the byte offset for splitting a string or []byte, as well as the
// effective number of bytes if the string were normalized to replace invalid
// UTF-8 encoded bytes with the Unicode replacement character (a 3-byte UTF-8
// sequence, represented in Go as utf8.RuneError)
func findValidSplit(line string, maxBytes int) (splitOffset, effectiveBytes int) {
for offset, rune := range line {
splitOffset = offset
if effectiveBytes+utf8.RuneLen(rune) > maxBytes {
return splitOffset, effectiveBytes
}
effectiveBytes += utf8.RuneLen(rune)
}
splitOffset = len(line)
return
}
// publishBatch calls PutLogEvents for a given set of InputLogEvents,
// accounting for sequencing requirements (each request must reference the
// sequence token returned by the previous request).
func (l *logStream) publishBatch(batch *eventBatch) {
if batch.isEmpty() {
return
}
cwEvents := unwrapEvents(batch.events())
nextSequenceToken, err := l.putLogEvents(cwEvents, l.sequenceToken)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == dataAlreadyAcceptedCode {
// already submitted, just grab the correct sequence token
parts := strings.Split(awsErr.Message(), " ")
nextSequenceToken = &parts[len(parts)-1]
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Info("Data already accepted, ignoring error")
err = nil
} else if awsErr.Code() == invalidSequenceTokenCode {
// sequence code is bad, grab the correct one and retry
parts := strings.Split(awsErr.Message(), " ")
token := parts[len(parts)-1]
nextSequenceToken, err = l.putLogEvents(cwEvents, &token)
}
}
}
if err != nil {
logrus.Error(err)
} else {
l.sequenceToken = nextSequenceToken
}
}
// putLogEvents wraps the PutLogEvents API
func (l *logStream) putLogEvents(events []*cloudwatchlogs.InputLogEvent, sequenceToken *string) (*string, error) {
input := &cloudwatchlogs.PutLogEventsInput{
LogEvents: events,
SequenceToken: sequenceToken,
LogGroupName: aws.String(l.logGroupName),
LogStreamName: aws.String(l.logStreamName),
}
resp, err := l.client.PutLogEvents(input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
logrus.WithFields(logrus.Fields{
"errorCode": awsErr.Code(),
"message": awsErr.Message(),
"origError": awsErr.OrigErr(),
"logGroupName": l.logGroupName,
"logStreamName": l.logStreamName,
}).Error("Failed to put log events")
}
return nil, err
}
return resp.NextSequenceToken, nil
}
// ValidateLogOpt looks for awslogs-specific log options awslogs-region, awslogs-endpoint
// awslogs-group, awslogs-stream, awslogs-create-group, awslogs-datetime-format,
// awslogs-multiline-pattern
func ValidateLogOpt(cfg map[string]string) error {
for key := range cfg {
switch key {
case logGroupKey:
case logStreamKey:
case logCreateGroupKey:
case regionKey:
case endpointKey:
case tagKey:
case datetimeFormatKey:
case multilinePatternKey:
case credentialsEndpointKey:
case forceFlushIntervalKey:
case maxBufferedEventsKey:
default:
return fmt.Errorf("unknown log opt '%s' for %s log driver", key, name)
}
}
if cfg[logGroupKey] == "" {
return fmt.Errorf("must specify a value for log opt '%s'", logGroupKey)
}
if cfg[logCreateGroupKey] != "" {
if _, err := strconv.ParseBool(cfg[logCreateGroupKey]); err != nil {
return fmt.Errorf("must specify valid value for log opt '%s': %v", logCreateGroupKey, err)
}
}
if cfg[forceFlushIntervalKey] != "" {
if value, err := strconv.Atoi(cfg[forceFlushIntervalKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", forceFlushIntervalKey, cfg[forceFlushIntervalKey])
}
}
if cfg[maxBufferedEventsKey] != "" {
if value, err := strconv.Atoi(cfg[maxBufferedEventsKey]); err != nil || value <= 0 {
return fmt.Errorf("must specify a positive integer for log opt '%s': %v", maxBufferedEventsKey, cfg[maxBufferedEventsKey])
}
}
_, datetimeFormatKeyExists := cfg[datetimeFormatKey]
_, multilinePatternKeyExists := cfg[multilinePatternKey]
if datetimeFormatKeyExists && multilinePatternKeyExists {
return fmt.Errorf("you cannot configure log opt '%s' and '%s' at the same time", datetimeFormatKey, multilinePatternKey)
}
return nil
}
// Len returns the length of a byTimestamp slice. Len is required by the
// sort.Interface interface.
func (slice byTimestamp) Len() int {
return len(slice)
}
// Less compares two values in a byTimestamp slice by Timestamp. Less is
// required by the sort.Interface interface.
func (slice byTimestamp) Less(i, j int) bool {
iTimestamp, jTimestamp := int64(0), int64(0)
if slice != nil && slice[i].inputLogEvent.Timestamp != nil {
iTimestamp = *slice[i].inputLogEvent.Timestamp
}
if slice != nil && slice[j].inputLogEvent.Timestamp != nil {
jTimestamp = *slice[j].inputLogEvent.Timestamp
}
if iTimestamp == jTimestamp {
return slice[i].insertOrder < slice[j].insertOrder
}
return iTimestamp < jTimestamp
}
// Swap swaps two values in a byTimestamp slice with each other. Swap is
// required by the sort.Interface interface.
func (slice byTimestamp) Swap(i, j int) {
slice[i], slice[j] = slice[j], slice[i]
}
func unwrapEvents(events []wrappedEvent) []*cloudwatchlogs.InputLogEvent {
cwEvents := make([]*cloudwatchlogs.InputLogEvent, len(events))
for i, input := range events {
cwEvents[i] = input.inputLogEvent
}
return cwEvents
}
func newEventBatch() *eventBatch {
return &eventBatch{
batch: make([]wrappedEvent, 0),
bytes: 0,
}
}
// events returns a slice of wrappedEvents sorted in order of their
// timestamps and then by their insertion order (see `byTimestamp`).
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) events() []wrappedEvent {
sort.Sort(byTimestamp(b.batch))
return b.batch
}
// add adds an event to the batch of events accounting for the
// necessary overhead for an event to be logged. An error will be
// returned if the event cannot be added to the batch due to service
// limits.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) add(event wrappedEvent, size int) bool {
addBytes := size + perEventBytes
// verify we are still within service limits
switch {
case len(b.batch)+1 > maximumLogEventsPerPut:
return false
case b.bytes+addBytes > maximumBytesPerPut:
return false
}
b.bytes += addBytes
b.batch = append(b.batch, event)
return true
}
// count is the number of batched events. Warning: this method
// is not threadsafe and must not be used concurrently.
func (b *eventBatch) count() int {
return len(b.batch)
}
// size is the total number of bytes that the batch represents.
//
// Warning: this method is not threadsafe and must not be used
// concurrently.
func (b *eventBatch) size() int {
return b.bytes
}
func (b *eventBatch) isEmpty() bool {
zeroEvents := b.count() == 0
zeroSize := b.size() == 0
return zeroEvents && zeroSize
}
// reset prepares the batch for reuse.
func (b *eventBatch) reset() {
b.bytes = 0
b.batch = b.batch[:0]
}
| kzys | 0456e058d2b60606d4374cd975c635dfe7673f17 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | Ah! | thaJeztah | 5,044 |
moby/moby | 41,908 | vendor: docker/libnetwork b3507428be5b458cb0e2b4086b13531fb0706e46 | also somewhat related to https://github.com/moby/moby/issues/28589, which discusses the "implicit" binding of IPv6
depends on:
- [x] https://github.com/moby/moby/pull/42021 Update rootlesskit to v0.13.1 to fix handling of IPv6 addresses
- [x] https://github.com/rootless-containers/rootlesskit/pull/213 Refactor ParsePortSpec to handle IPv6 addresses, and improve validation
- [x] https://github.com/moby/moby/pull/42050 CI: update tests to be more resilient against CLI output format and for libnetwork changes
- [x] ~https://github.com/moby/moby/pull/42102~ https://github.com/moby/moby/pull/42179 update rootlesskit to v0.14.0
- [x] https://github.com/rootless-containers/rootlesskit/pull/232 Port API: support specifying IP version explicitly ("tcp4", "tcp6")
full diff: https://github.com/docker/libnetwork/compare/fa125a3512ee0f6187721c88582bf8c4378bd4d7...b3507428be5b458cb0e2b4086b13531fb0706e46
- fixed IPv6 iptables rules for enabled firewalld (https://github.com/moby/libnetwork/pull/2609)
- fixes https://github.com/moby/moby/issues/41861 "Docker uses 'iptables' instead of 'ip6tables' for IPv6 NAT rule, crashes"
- Fix regression in https://github.com/moby/libnetwork/pull/2608
- introduced in "Fix IPv6 Port Forwarding for the Bridge Driver" (https://github.com/moby/libnetwork/pull/2604)
- fixes https://github.com/moby/libnetwork/issues/2607 "IPv4 and IPv6 addresses are not bound by default anymore"
- fixes https://github.com/moby/moby/issues/41858 "IPv6 is no longer proxied by default anymore"
- Use hostIP to decide on Portmapper version (https://github.com/moby/libnetwork/pull/2616)
- fixes docker-proxy not being stopped correctly
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-20 16:52:00+00:00 | 2021-03-29 16:43:37+00:00 | integration-cli/docker_cli_port_test.go | package main
import (
"context"
"fmt"
"regexp"
"sort"
"strconv"
"strings"
"testing"
"gotest.tools/v3/assert"
)
func (s *DockerSuite) TestPortList(c *testing.T) {
testRequires(c, DaemonIsLinux)
// one port
out, _ := dockerCmd(c, "run", "-d", "-p", "9876:80", "busybox", "top")
firstID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", firstID, "80")
err := assertPortList(c, out, []string{"0.0.0.0:9876"})
// Port list is not correct
assert.NilError(c, err)
out, _ = dockerCmd(c, "port", firstID)
err = assertPortList(c, out, []string{"80/tcp -> 0.0.0.0:9876"})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", firstID)
// three port
out, _ = dockerCmd(c, "run", "-d",
"-p", "9876:80",
"-p", "9877:81",
"-p", "9878:82",
"busybox", "top")
ID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID, "80")
err = assertPortList(c, out, []string{"0.0.0.0:9876"})
// Port list is not correct
assert.NilError(c, err)
out, _ = dockerCmd(c, "port", ID)
err = assertPortList(c, out, []string{
"80/tcp -> 0.0.0.0:9876",
"81/tcp -> 0.0.0.0:9877",
"82/tcp -> 0.0.0.0:9878",
})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
// more and one port mapped to the same container port
out, _ = dockerCmd(c, "run", "-d",
"-p", "9876:80",
"-p", "9999:80",
"-p", "9877:81",
"-p", "9878:82",
"busybox", "top")
ID = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID, "80")
err = assertPortList(c, out, []string{"0.0.0.0:9876", "0.0.0.0:9999"})
// Port list is not correct
assert.NilError(c, err)
out, _ = dockerCmd(c, "port", ID)
err = assertPortList(c, out, []string{
"80/tcp -> 0.0.0.0:9876",
"80/tcp -> 0.0.0.0:9999",
"81/tcp -> 0.0.0.0:9877",
"82/tcp -> 0.0.0.0:9878",
})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
testRange := func() {
// host port ranges used
IDs := make([]string, 3)
for i := 0; i < 3; i++ {
out, _ = dockerCmd(c, "run", "-d", "-p", "9090-9092:80", "busybox", "top")
IDs[i] = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", IDs[i])
err = assertPortList(c, out, []string{fmt.Sprintf("80/tcp -> 0.0.0.0:%d", 9090+i)})
// Port list is not correct
assert.NilError(c, err)
}
// test port range exhaustion
out, _, err = dockerCmdWithError("run", "-d", "-p", "9090-9092:80", "busybox", "top")
// Exhausted port range did not return an error
assert.Assert(c, err != nil, "out: %s", out)
for i := 0; i < 3; i++ {
dockerCmd(c, "rm", "-f", IDs[i])
}
}
testRange()
// Verify we ran re-use port ranges after they are no longer in use.
testRange()
// test invalid port ranges
for _, invalidRange := range []string{"9090-9089:80", "9090-:80", "-9090:80"} {
out, _, err = dockerCmdWithError("run", "-d", "-p", invalidRange, "busybox", "top")
// Port range should have returned an error
assert.Assert(c, err != nil, "out: %s", out)
}
// test host range:container range spec.
out, _ = dockerCmd(c, "run", "-d", "-p", "9800-9803:80-83", "busybox", "top")
ID = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID)
err = assertPortList(c, out, []string{
"80/tcp -> 0.0.0.0:9800",
"81/tcp -> 0.0.0.0:9801",
"82/tcp -> 0.0.0.0:9802",
"83/tcp -> 0.0.0.0:9803",
})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
// test mixing protocols in same port range
out, _ = dockerCmd(c, "run", "-d", "-p", "8000-8080:80", "-p", "8000-8080:80/udp", "busybox", "top")
ID = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID)
// Running this test multiple times causes the TCP port to increment.
err = assertPortRange(ID, []int{8000, 8080}, []int{8000, 8080})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
}
func assertPortList(c *testing.T, out string, expected []string) error {
c.Helper()
lines := strings.Split(strings.Trim(out, "\n "), "\n")
if len(lines) != len(expected) {
return fmt.Errorf("different size lists %s, %d, %d", out, len(lines), len(expected))
}
sort.Strings(lines)
sort.Strings(expected)
// "docker port" does not yet have a "--format" flag, and older versions
// of the CLI used an incorrect output format for mappings on IPv6 addresses
// for example, "80/tcp -> :::80" instead of "80/tcp -> [::]:80".
oldFormat := func(mapping string) string {
old := strings.Replace(mapping, "-> [", "-> ", 1)
old = strings.Replace(old, "]:", ":", 1)
return old
}
for i := 0; i < len(expected); i++ {
if lines[i] == expected[i] {
continue
}
if lines[i] != oldFormat(expected[i]) {
return fmt.Errorf("|" + lines[i] + "!=" + expected[i] + "|")
}
}
return nil
}
func assertPortRange(id string, expectedTCP, expectedUDP []int) error {
client := testEnv.APIClient()
inspect, err := client.ContainerInspect(context.TODO(), id)
if err != nil {
return err
}
var validTCP, validUDP bool
for portAndProto, binding := range inspect.NetworkSettings.Ports {
if portAndProto.Proto() == "tcp" && len(expectedTCP) == 0 {
continue
}
if portAndProto.Proto() == "udp" && len(expectedTCP) == 0 {
continue
}
for _, b := range binding {
port, err := strconv.Atoi(b.HostPort)
if err != nil {
return err
}
if len(expectedTCP) > 0 {
if port < expectedTCP[0] || port > expectedTCP[1] {
return fmt.Errorf("tcp port (%d) not in range expected range %d-%d", port, expectedTCP[0], expectedTCP[1])
}
validTCP = true
}
if len(expectedUDP) > 0 {
if port < expectedUDP[0] || port > expectedUDP[1] {
return fmt.Errorf("udp port (%d) not in range expected range %d-%d", port, expectedUDP[0], expectedUDP[1])
}
validUDP = true
}
}
}
if !validTCP {
return fmt.Errorf("tcp port not found")
}
if !validUDP {
return fmt.Errorf("udp port not found")
}
return nil
}
func stopRemoveContainer(id string, c *testing.T) {
dockerCmd(c, "rm", "-f", id)
}
func (s *DockerSuite) TestUnpublishedPortsInPsOutput(c *testing.T) {
testRequires(c, DaemonIsLinux)
// Run busybox with command line expose (equivalent to EXPOSE in image's Dockerfile) for the following ports
port1 := 80
port2 := 443
expose1 := fmt.Sprintf("--expose=%d", port1)
expose2 := fmt.Sprintf("--expose=%d", port2)
dockerCmd(c, "run", "-d", expose1, expose2, "busybox", "sleep", "5")
// Check docker ps o/p for last created container reports the unpublished ports
unpPort1 := fmt.Sprintf("%d/tcp", port1)
unpPort2 := fmt.Sprintf("%d/tcp", port2)
out, _ := dockerCmd(c, "ps", "-n=1")
// Missing unpublished ports in docker ps output
assert.Assert(c, strings.Contains(out, unpPort1))
// Missing unpublished ports in docker ps output
assert.Assert(c, strings.Contains(out, unpPort2))
// Run the container forcing to publish the exposed ports
dockerCmd(c, "run", "-d", "-P", expose1, expose2, "busybox", "sleep", "5")
// Check docker ps o/p for last created container reports the exposed ports in the port bindings
expBndRegx1 := regexp.MustCompile(`0.0.0.0:\d\d\d\d\d->` + unpPort1)
expBndRegx2 := regexp.MustCompile(`0.0.0.0:\d\d\d\d\d->` + unpPort2)
out, _ = dockerCmd(c, "ps", "-n=1")
// Cannot find expected port binding port (0.0.0.0:xxxxx->unpPort1) in docker ps output
assert.Equal(c, expBndRegx1.MatchString(out), true, fmt.Sprintf("out: %s; unpPort1: %s", out, unpPort1))
// Cannot find expected port binding port (0.0.0.0:xxxxx->unpPort2) in docker ps output
assert.Equal(c, expBndRegx2.MatchString(out), true, fmt.Sprintf("out: %s; unpPort2: %s", out, unpPort2))
// Run the container specifying explicit port bindings for the exposed ports
offset := 10000
pFlag1 := fmt.Sprintf("%d:%d", offset+port1, port1)
pFlag2 := fmt.Sprintf("%d:%d", offset+port2, port2)
out, _ = dockerCmd(c, "run", "-d", "-p", pFlag1, "-p", pFlag2, expose1, expose2, "busybox", "sleep", "5")
id := strings.TrimSpace(out)
// Check docker ps o/p for last created container reports the specified port mappings
expBnd1 := fmt.Sprintf("0.0.0.0:%d->%s", offset+port1, unpPort1)
expBnd2 := fmt.Sprintf("0.0.0.0:%d->%s", offset+port2, unpPort2)
out, _ = dockerCmd(c, "ps", "-n=1")
// Cannot find expected port binding (expBnd1) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd1))
// Cannot find expected port binding (expBnd2) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd2))
// Remove container now otherwise it will interfere with next test
stopRemoveContainer(id, c)
// Run the container with explicit port bindings and no exposed ports
out, _ = dockerCmd(c, "run", "-d", "-p", pFlag1, "-p", pFlag2, "busybox", "sleep", "5")
id = strings.TrimSpace(out)
// Check docker ps o/p for last created container reports the specified port mappings
out, _ = dockerCmd(c, "ps", "-n=1")
// Cannot find expected port binding (expBnd1) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd1))
// Cannot find expected port binding (expBnd2) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd2))
// Remove container now otherwise it will interfere with next test
stopRemoveContainer(id, c)
// Run the container with one unpublished exposed port and one explicit port binding
dockerCmd(c, "run", "-d", expose1, "-p", pFlag2, "busybox", "sleep", "5")
// Check docker ps o/p for last created container reports the specified unpublished port and port mapping
out, _ = dockerCmd(c, "ps", "-n=1")
// Missing unpublished exposed ports (unpPort1) in docker ps output
assert.Assert(c, strings.Contains(out, unpPort1))
// Missing port binding (expBnd2) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd2))
}
func (s *DockerSuite) TestPortHostBinding(c *testing.T) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
out, _ := dockerCmd(c, "run", "-d", "-p", "9876:80", "busybox", "nc", "-l", "-p", "80")
firstID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", firstID, "80")
err := assertPortList(c, out, []string{"0.0.0.0:9876"})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "run", "--net=host", "busybox", "nc", "localhost", "9876")
dockerCmd(c, "rm", "-f", firstID)
out, _, err = dockerCmdWithError("run", "--net=host", "busybox", "nc", "localhost", "9876")
// Port is still bound after the Container is removed
assert.Assert(c, err != nil, "out: %s", out)
}
func (s *DockerSuite) TestPortExposeHostBinding(c *testing.T) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
out, _ := dockerCmd(c, "run", "-d", "-P", "--expose", "80", "busybox", "nc", "-l", "-p", "80")
firstID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "inspect", "--format", `{{index .NetworkSettings.Ports "80/tcp" 0 "HostPort" }}`, firstID)
exposedPort := strings.TrimSpace(out)
dockerCmd(c, "run", "--net=host", "busybox", "nc", "127.0.0.1", exposedPort)
dockerCmd(c, "rm", "-f", firstID)
out, _, err := dockerCmdWithError("run", "--net=host", "busybox", "nc", "127.0.0.1", exposedPort)
// Port is still bound after the Container is removed
assert.Assert(c, err != nil, "out: %s", out)
}
func (s *DockerSuite) TestPortBindingOnSandbox(c *testing.T) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
dockerCmd(c, "network", "create", "--internal", "-d", "bridge", "internal-net")
nr := getNetworkResource(c, "internal-net")
assert.Equal(c, nr.Internal, true)
dockerCmd(c, "run", "--net", "internal-net", "-d", "--name", "c1",
"-p", "8080:8080", "busybox", "nc", "-l", "-p", "8080")
assert.Assert(c, waitRun("c1") == nil)
_, _, err := dockerCmdWithError("run", "--net=host", "busybox", "nc", "localhost", "8080")
assert.Assert(c, err != nil, "Port mapping on internal network is expected to fail")
// Connect container to another normal bridge network
dockerCmd(c, "network", "create", "-d", "bridge", "foo-net")
dockerCmd(c, "network", "connect", "foo-net", "c1")
_, _, err = dockerCmdWithError("run", "--net=host", "busybox", "nc", "localhost", "8080")
assert.Assert(c, err == nil, "Port mapping on the new network is expected to succeed")
}
| package main
import (
"context"
"fmt"
"regexp"
"sort"
"strconv"
"strings"
"testing"
"gotest.tools/v3/assert"
)
func (s *DockerSuite) TestPortList(c *testing.T) {
testRequires(c, DaemonIsLinux)
// one port
out, _ := dockerCmd(c, "run", "-d", "-p", "9876:80", "busybox", "top")
firstID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", firstID, "80")
err := assertPortList(c, out, []string{"0.0.0.0:9876", "[::]:9876"})
// Port list is not correct
assert.NilError(c, err)
out, _ = dockerCmd(c, "port", firstID)
err = assertPortList(c, out, []string{"80/tcp -> 0.0.0.0:9876", "80/tcp -> [::]:9876"})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", firstID)
// three port
out, _ = dockerCmd(c, "run", "-d",
"-p", "9876:80",
"-p", "9877:81",
"-p", "9878:82",
"busybox", "top")
ID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID, "80")
err = assertPortList(c, out, []string{"0.0.0.0:9876", "[::]:9876"})
// Port list is not correct
assert.NilError(c, err)
out, _ = dockerCmd(c, "port", ID)
err = assertPortList(c, out, []string{
"80/tcp -> 0.0.0.0:9876",
"80/tcp -> [::]:9876",
"81/tcp -> 0.0.0.0:9877",
"81/tcp -> [::]:9877",
"82/tcp -> 0.0.0.0:9878",
"82/tcp -> [::]:9878",
})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
// more and one port mapped to the same container port
out, _ = dockerCmd(c, "run", "-d",
"-p", "9876:80",
"-p", "9999:80",
"-p", "9877:81",
"-p", "9878:82",
"busybox", "top")
ID = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID, "80")
err = assertPortList(c, out, []string{"0.0.0.0:9876", "[::]:9876", "0.0.0.0:9999", "[::]:9999"})
// Port list is not correct
assert.NilError(c, err)
out, _ = dockerCmd(c, "port", ID)
err = assertPortList(c, out, []string{
"80/tcp -> 0.0.0.0:9876",
"80/tcp -> 0.0.0.0:9999",
"80/tcp -> [::]:9876",
"80/tcp -> [::]:9999",
"81/tcp -> 0.0.0.0:9877",
"81/tcp -> [::]:9877",
"82/tcp -> 0.0.0.0:9878",
"82/tcp -> [::]:9878",
})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
testRange := func() {
// host port ranges used
IDs := make([]string, 3)
for i := 0; i < 3; i++ {
out, _ = dockerCmd(c, "run", "-d", "-p", "9090-9092:80", "busybox", "top")
IDs[i] = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", IDs[i])
err = assertPortList(c, out, []string{
fmt.Sprintf("80/tcp -> 0.0.0.0:%d", 9090+i),
fmt.Sprintf("80/tcp -> [::]:%d", 9090+i),
})
// Port list is not correct
assert.NilError(c, err)
}
// test port range exhaustion
out, _, err = dockerCmdWithError("run", "-d", "-p", "9090-9092:80", "busybox", "top")
// Exhausted port range did not return an error
assert.Assert(c, err != nil, "out: %s", out)
for i := 0; i < 3; i++ {
dockerCmd(c, "rm", "-f", IDs[i])
}
}
testRange()
// Verify we ran re-use port ranges after they are no longer in use.
testRange()
// test invalid port ranges
for _, invalidRange := range []string{"9090-9089:80", "9090-:80", "-9090:80"} {
out, _, err = dockerCmdWithError("run", "-d", "-p", invalidRange, "busybox", "top")
// Port range should have returned an error
assert.Assert(c, err != nil, "out: %s", out)
}
// test host range:container range spec.
out, _ = dockerCmd(c, "run", "-d", "-p", "9800-9803:80-83", "busybox", "top")
ID = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID)
err = assertPortList(c, out, []string{
"80/tcp -> 0.0.0.0:9800",
"80/tcp -> [::]:9800",
"81/tcp -> 0.0.0.0:9801",
"81/tcp -> [::]:9801",
"82/tcp -> 0.0.0.0:9802",
"82/tcp -> [::]:9802",
"83/tcp -> 0.0.0.0:9803",
"83/tcp -> [::]:9803",
})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
// test mixing protocols in same port range
out, _ = dockerCmd(c, "run", "-d", "-p", "8000-8080:80", "-p", "8000-8080:80/udp", "busybox", "top")
ID = strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", ID)
// Running this test multiple times causes the TCP port to increment.
err = assertPortRange(ID, []int{8000, 8080}, []int{8000, 8080})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "rm", "-f", ID)
}
func assertPortList(c *testing.T, out string, expected []string) error {
c.Helper()
lines := strings.Split(strings.Trim(out, "\n "), "\n")
if len(lines) != len(expected) {
return fmt.Errorf("different size lists %s, %d, %d", out, len(lines), len(expected))
}
sort.Strings(lines)
sort.Strings(expected)
// "docker port" does not yet have a "--format" flag, and older versions
// of the CLI used an incorrect output format for mappings on IPv6 addresses
// for example, "80/tcp -> :::80" instead of "80/tcp -> [::]:80".
oldFormat := func(mapping string) string {
old := strings.Replace(mapping, "[", "", 1)
old = strings.Replace(old, "]:", ":", 1)
return old
}
for i := 0; i < len(expected); i++ {
if lines[i] == expected[i] {
continue
}
if lines[i] != oldFormat(expected[i]) {
return fmt.Errorf("|" + lines[i] + "!=" + expected[i] + "|")
}
}
return nil
}
func assertPortRange(id string, expectedTCP, expectedUDP []int) error {
client := testEnv.APIClient()
inspect, err := client.ContainerInspect(context.TODO(), id)
if err != nil {
return err
}
var validTCP, validUDP bool
for portAndProto, binding := range inspect.NetworkSettings.Ports {
if portAndProto.Proto() == "tcp" && len(expectedTCP) == 0 {
continue
}
if portAndProto.Proto() == "udp" && len(expectedTCP) == 0 {
continue
}
for _, b := range binding {
port, err := strconv.Atoi(b.HostPort)
if err != nil {
return err
}
if len(expectedTCP) > 0 {
if port < expectedTCP[0] || port > expectedTCP[1] {
return fmt.Errorf("tcp port (%d) not in range expected range %d-%d", port, expectedTCP[0], expectedTCP[1])
}
validTCP = true
}
if len(expectedUDP) > 0 {
if port < expectedUDP[0] || port > expectedUDP[1] {
return fmt.Errorf("udp port (%d) not in range expected range %d-%d", port, expectedUDP[0], expectedUDP[1])
}
validUDP = true
}
}
}
if !validTCP {
return fmt.Errorf("tcp port not found")
}
if !validUDP {
return fmt.Errorf("udp port not found")
}
return nil
}
func stopRemoveContainer(id string, c *testing.T) {
dockerCmd(c, "rm", "-f", id)
}
func (s *DockerSuite) TestUnpublishedPortsInPsOutput(c *testing.T) {
testRequires(c, DaemonIsLinux)
// Run busybox with command line expose (equivalent to EXPOSE in image's Dockerfile) for the following ports
port1 := 80
port2 := 443
expose1 := fmt.Sprintf("--expose=%d", port1)
expose2 := fmt.Sprintf("--expose=%d", port2)
dockerCmd(c, "run", "-d", expose1, expose2, "busybox", "sleep", "5")
// Check docker ps o/p for last created container reports the unpublished ports
unpPort1 := fmt.Sprintf("%d/tcp", port1)
unpPort2 := fmt.Sprintf("%d/tcp", port2)
out, _ := dockerCmd(c, "ps", "-n=1")
// Missing unpublished ports in docker ps output
assert.Assert(c, strings.Contains(out, unpPort1))
// Missing unpublished ports in docker ps output
assert.Assert(c, strings.Contains(out, unpPort2))
// Run the container forcing to publish the exposed ports
dockerCmd(c, "run", "-d", "-P", expose1, expose2, "busybox", "sleep", "5")
// Check docker ps o/p for last created container reports the exposed ports in the port bindings
expBndRegx1 := regexp.MustCompile(`0.0.0.0:\d\d\d\d\d->` + unpPort1)
expBndRegx2 := regexp.MustCompile(`0.0.0.0:\d\d\d\d\d->` + unpPort2)
out, _ = dockerCmd(c, "ps", "-n=1")
// Cannot find expected port binding port (0.0.0.0:xxxxx->unpPort1) in docker ps output
assert.Equal(c, expBndRegx1.MatchString(out), true, fmt.Sprintf("out: %s; unpPort1: %s", out, unpPort1))
// Cannot find expected port binding port (0.0.0.0:xxxxx->unpPort2) in docker ps output
assert.Equal(c, expBndRegx2.MatchString(out), true, fmt.Sprintf("out: %s; unpPort2: %s", out, unpPort2))
// Run the container specifying explicit port bindings for the exposed ports
offset := 10000
pFlag1 := fmt.Sprintf("%d:%d", offset+port1, port1)
pFlag2 := fmt.Sprintf("%d:%d", offset+port2, port2)
out, _ = dockerCmd(c, "run", "-d", "-p", pFlag1, "-p", pFlag2, expose1, expose2, "busybox", "sleep", "5")
id := strings.TrimSpace(out)
// Check docker ps o/p for last created container reports the specified port mappings
expBnd1 := fmt.Sprintf("0.0.0.0:%d->%s", offset+port1, unpPort1)
expBnd2 := fmt.Sprintf("0.0.0.0:%d->%s", offset+port2, unpPort2)
out, _ = dockerCmd(c, "ps", "-n=1")
// Cannot find expected port binding (expBnd1) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd1))
// Cannot find expected port binding (expBnd2) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd2))
// Remove container now otherwise it will interfere with next test
stopRemoveContainer(id, c)
// Run the container with explicit port bindings and no exposed ports
out, _ = dockerCmd(c, "run", "-d", "-p", pFlag1, "-p", pFlag2, "busybox", "sleep", "5")
id = strings.TrimSpace(out)
// Check docker ps o/p for last created container reports the specified port mappings
out, _ = dockerCmd(c, "ps", "-n=1")
// Cannot find expected port binding (expBnd1) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd1))
// Cannot find expected port binding (expBnd2) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd2))
// Remove container now otherwise it will interfere with next test
stopRemoveContainer(id, c)
// Run the container with one unpublished exposed port and one explicit port binding
dockerCmd(c, "run", "-d", expose1, "-p", pFlag2, "busybox", "sleep", "5")
// Check docker ps o/p for last created container reports the specified unpublished port and port mapping
out, _ = dockerCmd(c, "ps", "-n=1")
// Missing unpublished exposed ports (unpPort1) in docker ps output
assert.Assert(c, strings.Contains(out, unpPort1))
// Missing port binding (expBnd2) in docker ps output
assert.Assert(c, strings.Contains(out, expBnd2))
}
func (s *DockerSuite) TestPortHostBinding(c *testing.T) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
out, _ := dockerCmd(c, "run", "-d", "-p", "9876:80", "busybox", "nc", "-l", "-p", "80")
firstID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "port", firstID, "80")
err := assertPortList(c, out, []string{"0.0.0.0:9876", "[::]:9876"})
// Port list is not correct
assert.NilError(c, err)
dockerCmd(c, "run", "--net=host", "busybox", "nc", "localhost", "9876")
dockerCmd(c, "rm", "-f", firstID)
out, _, err = dockerCmdWithError("run", "--net=host", "busybox", "nc", "localhost", "9876")
// Port is still bound after the Container is removed
assert.Assert(c, err != nil, "out: %s", out)
}
func (s *DockerSuite) TestPortExposeHostBinding(c *testing.T) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
out, _ := dockerCmd(c, "run", "-d", "-P", "--expose", "80", "busybox", "nc", "-l", "-p", "80")
firstID := strings.TrimSpace(out)
out, _ = dockerCmd(c, "inspect", "--format", `{{index .NetworkSettings.Ports "80/tcp" 0 "HostPort" }}`, firstID)
exposedPort := strings.TrimSpace(out)
dockerCmd(c, "run", "--net=host", "busybox", "nc", "127.0.0.1", exposedPort)
dockerCmd(c, "rm", "-f", firstID)
out, _, err := dockerCmdWithError("run", "--net=host", "busybox", "nc", "127.0.0.1", exposedPort)
// Port is still bound after the Container is removed
assert.Assert(c, err != nil, "out: %s", out)
}
func (s *DockerSuite) TestPortBindingOnSandbox(c *testing.T) {
testRequires(c, DaemonIsLinux, NotUserNamespace)
dockerCmd(c, "network", "create", "--internal", "-d", "bridge", "internal-net")
nr := getNetworkResource(c, "internal-net")
assert.Equal(c, nr.Internal, true)
dockerCmd(c, "run", "--net", "internal-net", "-d", "--name", "c1",
"-p", "8080:8080", "busybox", "nc", "-l", "-p", "8080")
assert.Assert(c, waitRun("c1") == nil)
_, _, err := dockerCmdWithError("run", "--net=host", "busybox", "nc", "localhost", "8080")
assert.Assert(c, err != nil, "Port mapping on internal network is expected to fail")
// Connect container to another normal bridge network
dockerCmd(c, "network", "create", "-d", "bridge", "foo-net")
dockerCmd(c, "network", "connect", "foo-net", "c1")
_, _, err = dockerCmdWithError("run", "--net=host", "busybox", "nc", "localhost", "8080")
assert.Assert(c, err == nil, "Port mapping on the new network is expected to succeed")
}
| thaJeztah | 797b974cb90e32c7efe9e324d7459122c3f6b7b0 | d7a5abe6bd9b027d21b7f7a8703f38ad62913aff | I made the normalisation too strict in https://github.com/moby/moby/pull/42050, and forgot the "expected" format was sometimes passed as a "full" format (`80/tcp -> [::]:80`), and sometimes only the mapping (`[::]:80`); pushed this fix as a separate commit in this PR, but I can move to a separate PR if we think that makes more sense | thaJeztah | 5,045 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
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guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | Is this intended to check `BPF_CGROUP_DEVICE` or `CGROUP_BPF`? :sweat_smile:
(From what I can tell, `CGROUP_BPF` is the config option that enables the underlying `BPF_CGROUP_DEVICE` functionality in the kernel, so probably splitting hairs a little here.) | tianon | 5,046 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | This file (fairly consistently) uses `camelCase` for variables (and `snake_case` for functions). I think we should also consider it a failure case if we don't find the referenced file:
```suggestion
cgroupv2ControllersFile='/sys/fs/cgroup/cgroup.controllers'
if [ -s "$cgroupv2ControllersFile" ]; then
mapfile -t cgroupv2Controllers < "$cgroupv2ControllersFile"
wrap_good '- cgroupv2 controllers' "${cgroupv2Controllers[*]}"
else
wrap_warning "warning: missing '$cgroupv2ControllersFile'"
fi
``` | tianon | 5,047 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | we should confirm that the file contains the following controllers:
- cpu
- cpuset
- memory
- io
- pids | AkihiroSuda | 5,048 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | I was following along from the description in https://github.com/moby/moby/issues/41874#issue-784953371 .
Do you think this is a better comment ` "checking if CONFIG_CGROUP_BPF is enabled"` ? | gunadhya | 5,049 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
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guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | My bad, I'll update the variable names to camelCase and create the warning if the file doesn't exist. | gunadhya | 5,050 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | I'll update it to show if the file has `cpu,cpuset,memory,io,pids` enabled or missing similar to other checks. | gunadhya | 5,051 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | 
Is this better? | gunadhya | 5,052 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | Ah my bad, nope that's fine. | tianon | 5,053 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | Sorry for the delay -- this needs a rebase, but I think we can also simplify this a bit (and make sure it's still POSIX compatible, per #42410, which the mapfile-based implementation is not) with something like the following:
```suggestion
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
```
I'm also not wild about the unbounded `find /sys/fs/cgroup` -- I think if we can't find a better way to check whether the cgroup freezer is available then we should probably just leave a `TODO` comment instead (or not worry about it -- can any of these actually be usefully disabled?). :confused: :disappointed: | tianon | 5,054 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
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If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | Yes, That makes sense. I'll rebase and update the checks for controllers in POSIX. As for the freezer check I'm not sure if we can disable it. I'll have to read about it. I can try to find a better way to do the check or I'll update it with a`TODO`. Is that okay? | gunadhya | 5,055 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
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guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | ```suggestion
# TODO find an efficient way to check if cgroup.freeze exists in subdir
``` | tianon | 5,056 |
moby/moby | 41,897 | Updated check_config with cgroupv2 controllers | Fixes #41874
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Added cgroupv2 available controllers and check for CONFIG_CGROUP_BPF in contrib/check-config.sh
**- How I did it**
1. Reading the /sys/fs/cgroup/cgroup.controllers file for available controllers
2. Added a new CheckFlag for CONFIG_CGROUP_BPF to BPF_CGROUP_DEVICE support
**- How to verify it**
**Output :**
Ran on Linux 5.4.0-62-generic
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
Update in contrib/check-config.sh cgroupv2 controllers and CONFIG_CGROUP_BPF
**- A picture of a cute animal (not mandatory but encouraged)**
| null | 2021-01-19 13:53:24+00:00 | 2021-07-29 11:56:26+00:00 | contrib/check-config.sh | #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env sh
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs="
/proc/config.gz
/boot/config-$(uname -r)
/usr/src/linux-$(uname -r)/.config
/usr/src/linux/.config
"
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:=/proc/config.gz}"
fi
if ! command -v zgrep > /dev/null 2>&1; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
codes=
if [ "$1" = 'bold' ]; then
codes='1'
shift
fi
if [ "$#" -gt 0 ]; then
code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes="${codes:+$codes;}$code"
fi
fi
printf '\033[%sm' "$codes"
}
wrap_color() {
text="$1"
shift
color "$@"
printf '%s' "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
printf -- '- '
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
. /etc/os-release 2> /dev/null || /bin/true
case "$ID" in
centos | rhel)
case "$VERSION_ID" in
7*)
# this is a CentOS7 or RHEL7 system
grep -q 'user_namespace.enable=1' /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
;;
esac
;;
esac
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in $possibleConfigs; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
printf -- '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
wrap_good 'cgroup hierarchy' 'cgroupv2'
cgroupv2ControllerFile='/sys/fs/cgroup/cgroup.controllers'
if [ -f "$cgroupv2ControllerFile" ]; then
echo ' Controllers:'
for controller in cpu cpuset io memory pids; do
if grep -qE '(^| )'"$controller"'($| )' "$cgroupv2ControllerFile"; then
echo " - $(wrap_good "$controller" 'available')"
else
echo " - $(wrap_bad "$controller" 'missing')"
fi
done
else
wrap_bad "$cgroupv2ControllerFile" 'nonexistent??'
fi
# TODO find an efficient way to check if cgroup.freeze exists in subdir
else
cgroupSubsystemDir="$(sed -rne '/^[^ ]+ ([^ ]+) cgroup ([^ ]*,)?(cpu|cpuacct|cpuset|devices|freezer|memory)[, ].*$/ { s//\1/p; q }' /proc/mounts)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
printf -- '- '
if command -v apparmor_parser > /dev/null 2>&1; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
printf ' '
if command -v apt-get > /dev/null 2>&1; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum > /dev/null 2>&1; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
check_flags \
NAMESPACES NET_NS PID_NS IPC_NS UTS_NS \
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG \
KEYS \
VETH BRIDGE BRIDGE_NETFILTER \
IP_NF_FILTER IP_NF_TARGET_MASQUERADE \
NETFILTER_XT_MATCH_ADDRTYPE \
NETFILTER_XT_MATCH_CONNTRACK \
NETFILTER_XT_MATCH_IPVS \
NETFILTER_XT_MARK \
IP_NF_NAT NF_NAT \
POSIX_MQUEUE
# (POSIX_MQUEUE is required for bind-mounting /dev/mqueue into containers)
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
# check availability of BPF_CGROUP_DEVICE support
if [ "$kernelMajor" -ge 5 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -ge 15 ]); then
check_flags CGROUP_BPF
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
check_flags SECCOMP_FILTER
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
printf -- '- '
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
printf -- '- '
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
check_flags \
BLK_CGROUP BLK_DEV_THROTTLING \
CGROUP_PERF \
CGROUP_HUGETLB \
NET_CLS_CGROUP $netprio \
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED \
IP_NF_TARGET_REDIRECT \
IP_VS \
IP_VS_NFCT \
IP_VS_PROTO_TCP \
IP_VS_PROTO_UDP \
IP_VS_RR \
SECURITY_SELINUX \
SECURITY_APPARMOR
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
printf ' - '
check_device /dev/zfs
printf ' - '
check_command zfs
printf ' - '
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| gunadhya | ad268e79c410c88fc2565bf3bd47287a711bf0c8 | 39a9d034f10177c764f475280695704e5458ac63 | ```suggestion
wrap_good 'cgroup hierarchy' 'cgroupv2'
``` | tianon | 5,057 |
moby/moby | 41,894 | docker info: silence unhandleable warnings | fixes https://github.com/moby/moby/issues/41790
<!--
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"closes #xxxx"
Please provide the following information:
-->
**- What I did**
The following warnings in `docker info` are now discarded, because there is no action user can actually take.
On cgroup v1:
- "WARNING: No blkio weight support"
- "WARNING: No blkio weight_device support"
On cgroup v2:
- "WARNING: No kernel memory TCP limit support"
- "WARNING: No oom kill disable support"
`docker run` still prints warnings when the missing feature is being attempted to use.
**- How I did it**
See the code
**- How to verify it**
Run `docker info`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
docker info: silence unhandleable warnings
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 06:11:29+00:00 | 2021-01-21 17:32:38+00:00 | daemon/info_unix.go | // +build !windows
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"os/exec"
"path/filepath"
"strings"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/pkg/sysinfo"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// fillPlatformInfo fills the platform related info.
func (daemon *Daemon) fillPlatformInfo(v *types.Info, sysInfo *sysinfo.SysInfo) {
v.CgroupDriver = daemon.getCgroupDriver()
v.CgroupVersion = "1"
if sysInfo.CgroupUnified {
v.CgroupVersion = "2"
}
v.MemoryLimit = sysInfo.MemoryLimit
v.SwapLimit = sysInfo.SwapLimit
v.KernelMemory = sysInfo.KernelMemory
v.KernelMemoryTCP = sysInfo.KernelMemoryTCP
v.OomKillDisable = sysInfo.OomKillDisable
v.CPUCfsPeriod = sysInfo.CPUCfs
v.CPUCfsQuota = sysInfo.CPUCfs
v.CPUShares = sysInfo.CPUShares
v.CPUSet = sysInfo.Cpuset
v.PidsLimit = sysInfo.PidsLimit
v.Runtimes = daemon.configStore.GetAllRuntimes()
v.DefaultRuntime = daemon.configStore.GetDefaultRuntimeName()
v.InitBinary = daemon.configStore.GetInitPath()
defaultRuntimeBinary := daemon.configStore.GetRuntime(v.DefaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, _, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
} else {
v.RuncCommit.ID = commit
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
}
// runc is now shipped as a separate package. Set "expected" to same value
// as "ID" to prevent clients from reporting a version-mismatch
v.RuncCommit.Expected = v.RuncCommit.ID
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.ContainerdCommit.ID = rv.Revision
} else {
logrus.Warnf("failed to retrieve containerd version: %v", err)
v.ContainerdCommit.ID = "N/A"
}
// containerd is now shipped as a separate package. Set "expected" to same
// value as "ID" to prevent clients from reporting a version-mismatch
v.ContainerdCommit.Expected = v.ContainerdCommit.ID
// TODO is there still a need to check the expected version for tini?
// if not, we can change this, and just set "Expected" to v.InitCommit.ID
v.InitCommit.Expected = dockerversion.InitCommitID
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if _, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
} else {
v.InitCommit.ID = commit
if len(dockerversion.InitCommitID) > len(commit) {
v.InitCommit.Expected = dockerversion.InitCommitID[0:len(commit)]
}
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
}
if v.CgroupDriver == cgroupNoneDriver {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. Systemd is required to enable cgroups in rootless-mode.")
} else {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. To enable cgroups in rootless-mode, you need to boot the system in cgroup v2 mode.")
}
} else {
if !v.MemoryLimit {
v.Warnings = append(v.Warnings, "WARNING: No memory limit support")
}
if !v.SwapLimit {
v.Warnings = append(v.Warnings, "WARNING: No swap limit support")
}
if !v.KernelMemoryTCP {
v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support")
}
if !v.OomKillDisable {
v.Warnings = append(v.Warnings, "WARNING: No oom kill disable support")
}
if !v.CPUCfsQuota {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs quota support")
}
if !v.CPUCfsPeriod {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs period support")
}
if !v.CPUShares {
v.Warnings = append(v.Warnings, "WARNING: No cpu shares support")
}
if !v.CPUSet {
v.Warnings = append(v.Warnings, "WARNING: No cpuset support")
}
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Support for cgroup v2 is experimental")
}
// TODO add fields for these options in types.Info
if !sysInfo.BlkioWeight {
v.Warnings = append(v.Warnings, "WARNING: No blkio weight support")
}
if !sysInfo.BlkioWeightDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio weight_device support")
}
if !sysInfo.BlkioReadBpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_bps_device support")
}
if !sysInfo.BlkioWriteBpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_bps_device support")
}
if !sysInfo.BlkioReadIOpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_iops_device support")
}
if !sysInfo.BlkioWriteIOpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_iops_device support")
}
}
if !v.IPv4Forwarding {
v.Warnings = append(v.Warnings, "WARNING: IPv4 forwarding is disabled")
}
if !v.BridgeNfIptables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-iptables is disabled")
}
if !v.BridgeNfIP6tables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-ip6tables is disabled")
}
}
func (daemon *Daemon) fillPlatformVersion(v *types.Version) {
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.Components = append(v.Components, types.ComponentVersion{
Name: "containerd",
Version: rv.Version,
Details: map[string]string{
"GitCommit": rv.Revision,
},
})
}
defaultRuntime := daemon.configStore.GetDefaultRuntimeName()
defaultRuntimeBinary := daemon.configStore.GetRuntime(defaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, ver, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: defaultRuntime,
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
}
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if ver, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: filepath.Base(defaultInitBinary),
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
}
}
func fillDriverWarnings(v *types.Info) {
for _, pair := range v.DriverStatus {
if pair[0] == "Data loop file" {
msg := fmt.Sprintf("WARNING: %s: usage of loopback devices is "+
"strongly discouraged for production use.\n "+
"Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.", v.Driver)
v.Warnings = append(v.Warnings, msg)
continue
}
if pair[0] == "Supports d_type" && pair[1] == "false" {
backingFs := getBackingFs(v)
msg := fmt.Sprintf("WARNING: %s: the backing %s filesystem is formatted without d_type support, which leads to incorrect behavior.\n", v.Driver, backingFs)
if backingFs == "xfs" {
msg += " Reformat the filesystem with ftype=1 to enable d_type support.\n"
}
msg += " Running without d_type support will not be supported in future releases."
v.Warnings = append(v.Warnings, msg)
continue
}
}
}
func getBackingFs(v *types.Info) string {
for _, pair := range v.DriverStatus {
if pair[0] == "Backing Filesystem" {
return pair[1]
}
}
return ""
}
// parseInitVersion parses a Tini version string, and extracts the "version"
// and "git commit" from the output.
//
// Output example from `docker-init --version`:
//
// tini version 0.18.0 - git.fec3683
func parseInitVersion(v string) (version string, commit string, err error) {
parts := strings.Split(v, " - ")
if len(parts) >= 2 {
gitParts := strings.Split(strings.TrimSpace(parts[1]), ".")
if len(gitParts) == 2 && gitParts[0] == "git" {
commit = gitParts[1]
}
}
parts[0] = strings.TrimSpace(parts[0])
if strings.HasPrefix(parts[0], "tini version ") {
version = strings.TrimPrefix(parts[0], "tini version ")
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return version, commit, err
}
// parseRuntimeVersion parses the output of `[runtime] --version` and extracts the
// "name", "version" and "git commit" from the output.
//
// Output example from `runc --version`:
//
// runc version 1.0.0-rc5+dev
// commit: 69663f0bd4b60df09991c08812a60108003fa340
// spec: 1.0.0
func parseRuntimeVersion(v string) (runtime string, version string, commit string, err error) {
lines := strings.Split(strings.TrimSpace(v), "\n")
for _, line := range lines {
if strings.Contains(line, "version") {
s := strings.Split(line, "version")
runtime = strings.TrimSpace(s[0])
version = strings.TrimSpace(s[len(s)-1])
continue
}
if strings.HasPrefix(line, "commit:") {
commit = strings.TrimSpace(strings.TrimPrefix(line, "commit:"))
continue
}
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return runtime, version, commit, err
}
func (daemon *Daemon) cgroupNamespacesEnabled(sysInfo *sysinfo.SysInfo) bool {
return sysInfo.CgroupNamespaces && containertypes.CgroupnsMode(daemon.configStore.CgroupNamespaceMode).IsPrivate()
}
// Rootless returns true if daemon is running in rootless mode
func (daemon *Daemon) Rootless() bool {
return daemon.configStore.Rootless
}
| // +build !windows
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"os/exec"
"path/filepath"
"strings"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/pkg/sysinfo"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// fillPlatformInfo fills the platform related info.
func (daemon *Daemon) fillPlatformInfo(v *types.Info, sysInfo *sysinfo.SysInfo) {
v.CgroupDriver = daemon.getCgroupDriver()
v.CgroupVersion = "1"
if sysInfo.CgroupUnified {
v.CgroupVersion = "2"
}
v.MemoryLimit = sysInfo.MemoryLimit
v.SwapLimit = sysInfo.SwapLimit
v.KernelMemory = sysInfo.KernelMemory
v.KernelMemoryTCP = sysInfo.KernelMemoryTCP
v.OomKillDisable = sysInfo.OomKillDisable
v.CPUCfsPeriod = sysInfo.CPUCfs
v.CPUCfsQuota = sysInfo.CPUCfs
v.CPUShares = sysInfo.CPUShares
v.CPUSet = sysInfo.Cpuset
v.PidsLimit = sysInfo.PidsLimit
v.Runtimes = daemon.configStore.GetAllRuntimes()
v.DefaultRuntime = daemon.configStore.GetDefaultRuntimeName()
v.InitBinary = daemon.configStore.GetInitPath()
defaultRuntimeBinary := daemon.configStore.GetRuntime(v.DefaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, _, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
} else {
v.RuncCommit.ID = commit
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
}
// runc is now shipped as a separate package. Set "expected" to same value
// as "ID" to prevent clients from reporting a version-mismatch
v.RuncCommit.Expected = v.RuncCommit.ID
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.ContainerdCommit.ID = rv.Revision
} else {
logrus.Warnf("failed to retrieve containerd version: %v", err)
v.ContainerdCommit.ID = "N/A"
}
// containerd is now shipped as a separate package. Set "expected" to same
// value as "ID" to prevent clients from reporting a version-mismatch
v.ContainerdCommit.Expected = v.ContainerdCommit.ID
// TODO is there still a need to check the expected version for tini?
// if not, we can change this, and just set "Expected" to v.InitCommit.ID
v.InitCommit.Expected = dockerversion.InitCommitID
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if _, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
} else {
v.InitCommit.ID = commit
if len(dockerversion.InitCommitID) > len(commit) {
v.InitCommit.Expected = dockerversion.InitCommitID[0:len(commit)]
}
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
}
if v.CgroupDriver == cgroupNoneDriver {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. Systemd is required to enable cgroups in rootless-mode.")
} else {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. To enable cgroups in rootless-mode, you need to boot the system in cgroup v2 mode.")
}
} else {
if !v.MemoryLimit {
v.Warnings = append(v.Warnings, "WARNING: No memory limit support")
}
if !v.SwapLimit {
v.Warnings = append(v.Warnings, "WARNING: No swap limit support")
}
if !v.KernelMemoryTCP && v.CgroupVersion == "1" {
// kernel memory is not available for cgroup v2.
// Warning is not printed on cgroup v2, because there is no action user can take.
v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support")
}
if !v.OomKillDisable && v.CgroupVersion == "1" {
// oom kill disable is not available for cgroup v2.
// Warning is not printed on cgroup v2, because there is no action user can take.
v.Warnings = append(v.Warnings, "WARNING: No oom kill disable support")
}
if !v.CPUCfsQuota {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs quota support")
}
if !v.CPUCfsPeriod {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs period support")
}
if !v.CPUShares {
v.Warnings = append(v.Warnings, "WARNING: No cpu shares support")
}
if !v.CPUSet {
v.Warnings = append(v.Warnings, "WARNING: No cpuset support")
}
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Support for cgroup v2 is experimental")
}
// TODO add fields for these options in types.Info
if !sysInfo.BlkioWeight && v.CgroupVersion == "2" {
// blkio weight is not available on cgroup v1 since kernel 5.0.
// Warning is not printed on cgroup v1, because there is no action user can take.
// On cgroup v2, blkio weight is implemented using io.weight
v.Warnings = append(v.Warnings, "WARNING: No io.weight support")
}
if !sysInfo.BlkioWeightDevice && v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.weight (per device) support")
}
if !sysInfo.BlkioReadBpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (rbps) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_bps_device support")
}
}
if !sysInfo.BlkioWriteBpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (wbps) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_bps_device support")
}
}
if !sysInfo.BlkioReadIOpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (riops) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_iops_device support")
}
}
if !sysInfo.BlkioWriteIOpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (wiops) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_iops_device support")
}
}
}
if !v.IPv4Forwarding {
v.Warnings = append(v.Warnings, "WARNING: IPv4 forwarding is disabled")
}
if !v.BridgeNfIptables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-iptables is disabled")
}
if !v.BridgeNfIP6tables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-ip6tables is disabled")
}
}
func (daemon *Daemon) fillPlatformVersion(v *types.Version) {
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.Components = append(v.Components, types.ComponentVersion{
Name: "containerd",
Version: rv.Version,
Details: map[string]string{
"GitCommit": rv.Revision,
},
})
}
defaultRuntime := daemon.configStore.GetDefaultRuntimeName()
defaultRuntimeBinary := daemon.configStore.GetRuntime(defaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, ver, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: defaultRuntime,
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
}
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if ver, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: filepath.Base(defaultInitBinary),
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
}
}
func fillDriverWarnings(v *types.Info) {
for _, pair := range v.DriverStatus {
if pair[0] == "Data loop file" {
msg := fmt.Sprintf("WARNING: %s: usage of loopback devices is "+
"strongly discouraged for production use.\n "+
"Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.", v.Driver)
v.Warnings = append(v.Warnings, msg)
continue
}
if pair[0] == "Supports d_type" && pair[1] == "false" {
backingFs := getBackingFs(v)
msg := fmt.Sprintf("WARNING: %s: the backing %s filesystem is formatted without d_type support, which leads to incorrect behavior.\n", v.Driver, backingFs)
if backingFs == "xfs" {
msg += " Reformat the filesystem with ftype=1 to enable d_type support.\n"
}
msg += " Running without d_type support will not be supported in future releases."
v.Warnings = append(v.Warnings, msg)
continue
}
}
}
func getBackingFs(v *types.Info) string {
for _, pair := range v.DriverStatus {
if pair[0] == "Backing Filesystem" {
return pair[1]
}
}
return ""
}
// parseInitVersion parses a Tini version string, and extracts the "version"
// and "git commit" from the output.
//
// Output example from `docker-init --version`:
//
// tini version 0.18.0 - git.fec3683
func parseInitVersion(v string) (version string, commit string, err error) {
parts := strings.Split(v, " - ")
if len(parts) >= 2 {
gitParts := strings.Split(strings.TrimSpace(parts[1]), ".")
if len(gitParts) == 2 && gitParts[0] == "git" {
commit = gitParts[1]
}
}
parts[0] = strings.TrimSpace(parts[0])
if strings.HasPrefix(parts[0], "tini version ") {
version = strings.TrimPrefix(parts[0], "tini version ")
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return version, commit, err
}
// parseRuntimeVersion parses the output of `[runtime] --version` and extracts the
// "name", "version" and "git commit" from the output.
//
// Output example from `runc --version`:
//
// runc version 1.0.0-rc5+dev
// commit: 69663f0bd4b60df09991c08812a60108003fa340
// spec: 1.0.0
func parseRuntimeVersion(v string) (runtime string, version string, commit string, err error) {
lines := strings.Split(strings.TrimSpace(v), "\n")
for _, line := range lines {
if strings.Contains(line, "version") {
s := strings.Split(line, "version")
runtime = strings.TrimSpace(s[0])
version = strings.TrimSpace(s[len(s)-1])
continue
}
if strings.HasPrefix(line, "commit:") {
commit = strings.TrimSpace(strings.TrimPrefix(line, "commit:"))
continue
}
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return runtime, version, commit, err
}
func (daemon *Daemon) cgroupNamespacesEnabled(sysInfo *sysinfo.SysInfo) bool {
return sysInfo.CgroupNamespaces && containertypes.CgroupnsMode(daemon.configStore.CgroupNamespaceMode).IsPrivate()
}
// Rootless returns true if daemon is running in rootless mode
func (daemon *Daemon) Rootless() bool {
return daemon.configStore.Rootless
}
| AkihiroSuda | d5612a0ef8aa5c43f8345302e8d20b5fd25517b3 | b865beba22aac576b95952fef97d4e775632c362 | Do we need to update the warnings to match the new cgroup? (ok for a follow-up) | thaJeztah | 5,058 |
moby/moby | 41,894 | docker info: silence unhandleable warnings | fixes https://github.com/moby/moby/issues/41790
<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
The following warnings in `docker info` are now discarded, because there is no action user can actually take.
On cgroup v1:
- "WARNING: No blkio weight support"
- "WARNING: No blkio weight_device support"
On cgroup v2:
- "WARNING: No kernel memory TCP limit support"
- "WARNING: No oom kill disable support"
`docker run` still prints warnings when the missing feature is being attempted to use.
**- How I did it**
See the code
**- How to verify it**
Run `docker info`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
docker info: silence unhandleable warnings
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 06:11:29+00:00 | 2021-01-21 17:32:38+00:00 | daemon/info_unix.go | // +build !windows
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"os/exec"
"path/filepath"
"strings"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/pkg/sysinfo"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// fillPlatformInfo fills the platform related info.
func (daemon *Daemon) fillPlatformInfo(v *types.Info, sysInfo *sysinfo.SysInfo) {
v.CgroupDriver = daemon.getCgroupDriver()
v.CgroupVersion = "1"
if sysInfo.CgroupUnified {
v.CgroupVersion = "2"
}
v.MemoryLimit = sysInfo.MemoryLimit
v.SwapLimit = sysInfo.SwapLimit
v.KernelMemory = sysInfo.KernelMemory
v.KernelMemoryTCP = sysInfo.KernelMemoryTCP
v.OomKillDisable = sysInfo.OomKillDisable
v.CPUCfsPeriod = sysInfo.CPUCfs
v.CPUCfsQuota = sysInfo.CPUCfs
v.CPUShares = sysInfo.CPUShares
v.CPUSet = sysInfo.Cpuset
v.PidsLimit = sysInfo.PidsLimit
v.Runtimes = daemon.configStore.GetAllRuntimes()
v.DefaultRuntime = daemon.configStore.GetDefaultRuntimeName()
v.InitBinary = daemon.configStore.GetInitPath()
defaultRuntimeBinary := daemon.configStore.GetRuntime(v.DefaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, _, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
} else {
v.RuncCommit.ID = commit
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
}
// runc is now shipped as a separate package. Set "expected" to same value
// as "ID" to prevent clients from reporting a version-mismatch
v.RuncCommit.Expected = v.RuncCommit.ID
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.ContainerdCommit.ID = rv.Revision
} else {
logrus.Warnf("failed to retrieve containerd version: %v", err)
v.ContainerdCommit.ID = "N/A"
}
// containerd is now shipped as a separate package. Set "expected" to same
// value as "ID" to prevent clients from reporting a version-mismatch
v.ContainerdCommit.Expected = v.ContainerdCommit.ID
// TODO is there still a need to check the expected version for tini?
// if not, we can change this, and just set "Expected" to v.InitCommit.ID
v.InitCommit.Expected = dockerversion.InitCommitID
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if _, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
} else {
v.InitCommit.ID = commit
if len(dockerversion.InitCommitID) > len(commit) {
v.InitCommit.Expected = dockerversion.InitCommitID[0:len(commit)]
}
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
}
if v.CgroupDriver == cgroupNoneDriver {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. Systemd is required to enable cgroups in rootless-mode.")
} else {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. To enable cgroups in rootless-mode, you need to boot the system in cgroup v2 mode.")
}
} else {
if !v.MemoryLimit {
v.Warnings = append(v.Warnings, "WARNING: No memory limit support")
}
if !v.SwapLimit {
v.Warnings = append(v.Warnings, "WARNING: No swap limit support")
}
if !v.KernelMemoryTCP {
v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support")
}
if !v.OomKillDisable {
v.Warnings = append(v.Warnings, "WARNING: No oom kill disable support")
}
if !v.CPUCfsQuota {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs quota support")
}
if !v.CPUCfsPeriod {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs period support")
}
if !v.CPUShares {
v.Warnings = append(v.Warnings, "WARNING: No cpu shares support")
}
if !v.CPUSet {
v.Warnings = append(v.Warnings, "WARNING: No cpuset support")
}
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Support for cgroup v2 is experimental")
}
// TODO add fields for these options in types.Info
if !sysInfo.BlkioWeight {
v.Warnings = append(v.Warnings, "WARNING: No blkio weight support")
}
if !sysInfo.BlkioWeightDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio weight_device support")
}
if !sysInfo.BlkioReadBpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_bps_device support")
}
if !sysInfo.BlkioWriteBpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_bps_device support")
}
if !sysInfo.BlkioReadIOpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_iops_device support")
}
if !sysInfo.BlkioWriteIOpsDevice {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_iops_device support")
}
}
if !v.IPv4Forwarding {
v.Warnings = append(v.Warnings, "WARNING: IPv4 forwarding is disabled")
}
if !v.BridgeNfIptables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-iptables is disabled")
}
if !v.BridgeNfIP6tables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-ip6tables is disabled")
}
}
func (daemon *Daemon) fillPlatformVersion(v *types.Version) {
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.Components = append(v.Components, types.ComponentVersion{
Name: "containerd",
Version: rv.Version,
Details: map[string]string{
"GitCommit": rv.Revision,
},
})
}
defaultRuntime := daemon.configStore.GetDefaultRuntimeName()
defaultRuntimeBinary := daemon.configStore.GetRuntime(defaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, ver, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: defaultRuntime,
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
}
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if ver, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: filepath.Base(defaultInitBinary),
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
}
}
func fillDriverWarnings(v *types.Info) {
for _, pair := range v.DriverStatus {
if pair[0] == "Data loop file" {
msg := fmt.Sprintf("WARNING: %s: usage of loopback devices is "+
"strongly discouraged for production use.\n "+
"Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.", v.Driver)
v.Warnings = append(v.Warnings, msg)
continue
}
if pair[0] == "Supports d_type" && pair[1] == "false" {
backingFs := getBackingFs(v)
msg := fmt.Sprintf("WARNING: %s: the backing %s filesystem is formatted without d_type support, which leads to incorrect behavior.\n", v.Driver, backingFs)
if backingFs == "xfs" {
msg += " Reformat the filesystem with ftype=1 to enable d_type support.\n"
}
msg += " Running without d_type support will not be supported in future releases."
v.Warnings = append(v.Warnings, msg)
continue
}
}
}
func getBackingFs(v *types.Info) string {
for _, pair := range v.DriverStatus {
if pair[0] == "Backing Filesystem" {
return pair[1]
}
}
return ""
}
// parseInitVersion parses a Tini version string, and extracts the "version"
// and "git commit" from the output.
//
// Output example from `docker-init --version`:
//
// tini version 0.18.0 - git.fec3683
func parseInitVersion(v string) (version string, commit string, err error) {
parts := strings.Split(v, " - ")
if len(parts) >= 2 {
gitParts := strings.Split(strings.TrimSpace(parts[1]), ".")
if len(gitParts) == 2 && gitParts[0] == "git" {
commit = gitParts[1]
}
}
parts[0] = strings.TrimSpace(parts[0])
if strings.HasPrefix(parts[0], "tini version ") {
version = strings.TrimPrefix(parts[0], "tini version ")
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return version, commit, err
}
// parseRuntimeVersion parses the output of `[runtime] --version` and extracts the
// "name", "version" and "git commit" from the output.
//
// Output example from `runc --version`:
//
// runc version 1.0.0-rc5+dev
// commit: 69663f0bd4b60df09991c08812a60108003fa340
// spec: 1.0.0
func parseRuntimeVersion(v string) (runtime string, version string, commit string, err error) {
lines := strings.Split(strings.TrimSpace(v), "\n")
for _, line := range lines {
if strings.Contains(line, "version") {
s := strings.Split(line, "version")
runtime = strings.TrimSpace(s[0])
version = strings.TrimSpace(s[len(s)-1])
continue
}
if strings.HasPrefix(line, "commit:") {
commit = strings.TrimSpace(strings.TrimPrefix(line, "commit:"))
continue
}
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return runtime, version, commit, err
}
func (daemon *Daemon) cgroupNamespacesEnabled(sysInfo *sysinfo.SysInfo) bool {
return sysInfo.CgroupNamespaces && containertypes.CgroupnsMode(daemon.configStore.CgroupNamespaceMode).IsPrivate()
}
// Rootless returns true if daemon is running in rootless mode
func (daemon *Daemon) Rootless() bool {
return daemon.configStore.Rootless
}
| // +build !windows
package daemon // import "github.com/docker/docker/daemon"
import (
"context"
"fmt"
"os/exec"
"path/filepath"
"strings"
"github.com/docker/docker/api/types"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/pkg/sysinfo"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// fillPlatformInfo fills the platform related info.
func (daemon *Daemon) fillPlatformInfo(v *types.Info, sysInfo *sysinfo.SysInfo) {
v.CgroupDriver = daemon.getCgroupDriver()
v.CgroupVersion = "1"
if sysInfo.CgroupUnified {
v.CgroupVersion = "2"
}
v.MemoryLimit = sysInfo.MemoryLimit
v.SwapLimit = sysInfo.SwapLimit
v.KernelMemory = sysInfo.KernelMemory
v.KernelMemoryTCP = sysInfo.KernelMemoryTCP
v.OomKillDisable = sysInfo.OomKillDisable
v.CPUCfsPeriod = sysInfo.CPUCfs
v.CPUCfsQuota = sysInfo.CPUCfs
v.CPUShares = sysInfo.CPUShares
v.CPUSet = sysInfo.Cpuset
v.PidsLimit = sysInfo.PidsLimit
v.Runtimes = daemon.configStore.GetAllRuntimes()
v.DefaultRuntime = daemon.configStore.GetDefaultRuntimeName()
v.InitBinary = daemon.configStore.GetInitPath()
defaultRuntimeBinary := daemon.configStore.GetRuntime(v.DefaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, _, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
} else {
v.RuncCommit.ID = commit
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
v.RuncCommit.ID = "N/A"
}
// runc is now shipped as a separate package. Set "expected" to same value
// as "ID" to prevent clients from reporting a version-mismatch
v.RuncCommit.Expected = v.RuncCommit.ID
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.ContainerdCommit.ID = rv.Revision
} else {
logrus.Warnf("failed to retrieve containerd version: %v", err)
v.ContainerdCommit.ID = "N/A"
}
// containerd is now shipped as a separate package. Set "expected" to same
// value as "ID" to prevent clients from reporting a version-mismatch
v.ContainerdCommit.Expected = v.ContainerdCommit.ID
// TODO is there still a need to check the expected version for tini?
// if not, we can change this, and just set "Expected" to v.InitCommit.ID
v.InitCommit.Expected = dockerversion.InitCommitID
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if _, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
} else {
v.InitCommit.ID = commit
if len(dockerversion.InitCommitID) > len(commit) {
v.InitCommit.Expected = dockerversion.InitCommitID[0:len(commit)]
}
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
v.InitCommit.ID = "N/A"
}
if v.CgroupDriver == cgroupNoneDriver {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. Systemd is required to enable cgroups in rootless-mode.")
} else {
v.Warnings = append(v.Warnings, "WARNING: Running in rootless-mode without cgroups. To enable cgroups in rootless-mode, you need to boot the system in cgroup v2 mode.")
}
} else {
if !v.MemoryLimit {
v.Warnings = append(v.Warnings, "WARNING: No memory limit support")
}
if !v.SwapLimit {
v.Warnings = append(v.Warnings, "WARNING: No swap limit support")
}
if !v.KernelMemoryTCP && v.CgroupVersion == "1" {
// kernel memory is not available for cgroup v2.
// Warning is not printed on cgroup v2, because there is no action user can take.
v.Warnings = append(v.Warnings, "WARNING: No kernel memory TCP limit support")
}
if !v.OomKillDisable && v.CgroupVersion == "1" {
// oom kill disable is not available for cgroup v2.
// Warning is not printed on cgroup v2, because there is no action user can take.
v.Warnings = append(v.Warnings, "WARNING: No oom kill disable support")
}
if !v.CPUCfsQuota {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs quota support")
}
if !v.CPUCfsPeriod {
v.Warnings = append(v.Warnings, "WARNING: No cpu cfs period support")
}
if !v.CPUShares {
v.Warnings = append(v.Warnings, "WARNING: No cpu shares support")
}
if !v.CPUSet {
v.Warnings = append(v.Warnings, "WARNING: No cpuset support")
}
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: Support for cgroup v2 is experimental")
}
// TODO add fields for these options in types.Info
if !sysInfo.BlkioWeight && v.CgroupVersion == "2" {
// blkio weight is not available on cgroup v1 since kernel 5.0.
// Warning is not printed on cgroup v1, because there is no action user can take.
// On cgroup v2, blkio weight is implemented using io.weight
v.Warnings = append(v.Warnings, "WARNING: No io.weight support")
}
if !sysInfo.BlkioWeightDevice && v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.weight (per device) support")
}
if !sysInfo.BlkioReadBpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (rbps) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_bps_device support")
}
}
if !sysInfo.BlkioWriteBpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (wbps) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_bps_device support")
}
}
if !sysInfo.BlkioReadIOpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (riops) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.read_iops_device support")
}
}
if !sysInfo.BlkioWriteIOpsDevice {
if v.CgroupVersion == "2" {
v.Warnings = append(v.Warnings, "WARNING: No io.max (wiops) support")
} else {
v.Warnings = append(v.Warnings, "WARNING: No blkio throttle.write_iops_device support")
}
}
}
if !v.IPv4Forwarding {
v.Warnings = append(v.Warnings, "WARNING: IPv4 forwarding is disabled")
}
if !v.BridgeNfIptables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-iptables is disabled")
}
if !v.BridgeNfIP6tables {
v.Warnings = append(v.Warnings, "WARNING: bridge-nf-call-ip6tables is disabled")
}
}
func (daemon *Daemon) fillPlatformVersion(v *types.Version) {
if rv, err := daemon.containerd.Version(context.Background()); err == nil {
v.Components = append(v.Components, types.ComponentVersion{
Name: "containerd",
Version: rv.Version,
Details: map[string]string{
"GitCommit": rv.Revision,
},
})
}
defaultRuntime := daemon.configStore.GetDefaultRuntimeName()
defaultRuntimeBinary := daemon.configStore.GetRuntime(defaultRuntime).Path
if rv, err := exec.Command(defaultRuntimeBinary, "--version").Output(); err == nil {
if _, ver, commit, err := parseRuntimeVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %v", defaultRuntimeBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: defaultRuntime,
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %v", defaultRuntimeBinary, err)
}
defaultInitBinary := daemon.configStore.GetInitPath()
if rv, err := exec.Command(defaultInitBinary, "--version").Output(); err == nil {
if ver, commit, err := parseInitVersion(string(rv)); err != nil {
logrus.Warnf("failed to parse %s version: %s", defaultInitBinary, err)
} else {
v.Components = append(v.Components, types.ComponentVersion{
Name: filepath.Base(defaultInitBinary),
Version: ver,
Details: map[string]string{
"GitCommit": commit,
},
})
}
} else {
logrus.Warnf("failed to retrieve %s version: %s", defaultInitBinary, err)
}
}
func fillDriverWarnings(v *types.Info) {
for _, pair := range v.DriverStatus {
if pair[0] == "Data loop file" {
msg := fmt.Sprintf("WARNING: %s: usage of loopback devices is "+
"strongly discouraged for production use.\n "+
"Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.", v.Driver)
v.Warnings = append(v.Warnings, msg)
continue
}
if pair[0] == "Supports d_type" && pair[1] == "false" {
backingFs := getBackingFs(v)
msg := fmt.Sprintf("WARNING: %s: the backing %s filesystem is formatted without d_type support, which leads to incorrect behavior.\n", v.Driver, backingFs)
if backingFs == "xfs" {
msg += " Reformat the filesystem with ftype=1 to enable d_type support.\n"
}
msg += " Running without d_type support will not be supported in future releases."
v.Warnings = append(v.Warnings, msg)
continue
}
}
}
func getBackingFs(v *types.Info) string {
for _, pair := range v.DriverStatus {
if pair[0] == "Backing Filesystem" {
return pair[1]
}
}
return ""
}
// parseInitVersion parses a Tini version string, and extracts the "version"
// and "git commit" from the output.
//
// Output example from `docker-init --version`:
//
// tini version 0.18.0 - git.fec3683
func parseInitVersion(v string) (version string, commit string, err error) {
parts := strings.Split(v, " - ")
if len(parts) >= 2 {
gitParts := strings.Split(strings.TrimSpace(parts[1]), ".")
if len(gitParts) == 2 && gitParts[0] == "git" {
commit = gitParts[1]
}
}
parts[0] = strings.TrimSpace(parts[0])
if strings.HasPrefix(parts[0], "tini version ") {
version = strings.TrimPrefix(parts[0], "tini version ")
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return version, commit, err
}
// parseRuntimeVersion parses the output of `[runtime] --version` and extracts the
// "name", "version" and "git commit" from the output.
//
// Output example from `runc --version`:
//
// runc version 1.0.0-rc5+dev
// commit: 69663f0bd4b60df09991c08812a60108003fa340
// spec: 1.0.0
func parseRuntimeVersion(v string) (runtime string, version string, commit string, err error) {
lines := strings.Split(strings.TrimSpace(v), "\n")
for _, line := range lines {
if strings.Contains(line, "version") {
s := strings.Split(line, "version")
runtime = strings.TrimSpace(s[0])
version = strings.TrimSpace(s[len(s)-1])
continue
}
if strings.HasPrefix(line, "commit:") {
commit = strings.TrimSpace(strings.TrimPrefix(line, "commit:"))
continue
}
}
if version == "" && commit == "" {
err = errors.Errorf("unknown output format: %s", v)
}
return runtime, version, commit, err
}
func (daemon *Daemon) cgroupNamespacesEnabled(sysInfo *sysinfo.SysInfo) bool {
return sysInfo.CgroupNamespaces && containertypes.CgroupnsMode(daemon.configStore.CgroupNamespaceMode).IsPrivate()
}
// Rootless returns true if daemon is running in rootless mode
func (daemon *Daemon) Rootless() bool {
return daemon.configStore.Rootless
}
| AkihiroSuda | d5612a0ef8aa5c43f8345302e8d20b5fd25517b3 | b865beba22aac576b95952fef97d4e775632c362 | updated | AkihiroSuda | 5,059 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | integration/container/run_cgroupns_linux_test.go | package container // import "github.com/docker/docker/integration/container"
import (
"context"
"strings"
"testing"
"time"
"github.com/docker/docker/client"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/integration/internal/requirement"
"github.com/docker/docker/testutil/daemon"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
"gotest.tools/v3/poll"
"gotest.tools/v3/skip"
)
// Gets the value of the cgroup namespace for pid 1 of a container
func containerCgroupNamespace(ctx context.Context, t *testing.T, client *client.Client, cID string) string {
res, err := container.Exec(ctx, client, cID, []string{"readlink", "/proc/1/ns/cgroup"})
assert.NilError(t, err)
assert.Assert(t, is.Len(res.Stderr(), 0))
assert.Equal(t, 0, res.ExitCode)
return strings.TrimSpace(res.Stdout())
}
// Bring up a daemon with the specified default cgroup namespace mode, and then create a container with the container options
func testRunWithCgroupNs(t *testing.T, daemonNsMode string, containerOpts ...func(*container.TestContainerConfig)) (string, string) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client, containerOpts...)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := containerCgroupNamespace(ctx, t, client, cID)
return containerCgroup, daemonCgroup
}
// Bring up a daemon with the specified default cgroup namespace mode. Create a container with the container options,
// expecting an error with the specified string
func testCreateFailureWithCgroupNs(t *testing.T, daemonNsMode string, errStr string, containerOpts ...func(*container.TestContainerConfig)) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
container.CreateExpectingErr(ctx, t, client, errStr, containerOpts...)
}
func TestCgroupNamespacesRun(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// should be in their own private cgroup namespace by default
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private")
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivileged(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
skip.If(t, testEnv.DaemonInfo.CgroupVersion == "2", "on cgroup v2, privileged containers use private cgroupns")
// When the daemon defaults to private cgroup namespaces, privileged containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunDaemonHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to host cgroup namespaces, containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "host")
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "host" should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("host"))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunPrivateMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "private" should be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivilegedAndPrivate(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true), container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunInvalidMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// An invalid cgroup namespace mode should return an error on container creation
errStr := "invalid cgroup namespace mode: invalid"
testCreateFailureWithCgroupNs(t, "private", errStr, container.WithCgroupnsMode("invalid"))
}
// Clients before 1.40 expect containers to be created in the host cgroup namespace,
// regardless of the default setting of the daemon, unless running with cgroup v2
func TestCgroupNamespacesRunOlderClient(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode("private"))
client := d.NewClientT(t, client.WithVersion("1.39"))
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := containerCgroupNamespace(ctx, t, client, cID)
if testEnv.DaemonInfo.CgroupVersion != "2" {
assert.Assert(t, daemonCgroup == containerCgroup)
} else {
assert.Assert(t, daemonCgroup != containerCgroup)
}
}
| package container // import "github.com/docker/docker/integration/container"
import (
"context"
"testing"
"time"
"github.com/docker/docker/client"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/integration/internal/requirement"
"github.com/docker/docker/testutil/daemon"
"gotest.tools/v3/assert"
"gotest.tools/v3/poll"
"gotest.tools/v3/skip"
)
// Bring up a daemon with the specified default cgroup namespace mode, and then create a container with the container options
func testRunWithCgroupNs(t *testing.T, daemonNsMode string, containerOpts ...func(*container.TestContainerConfig)) (string, string) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client, containerOpts...)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := container.GetContainerNS(ctx, t, client, cID, "cgroup")
return containerCgroup, daemonCgroup
}
// Bring up a daemon with the specified default cgroup namespace mode. Create a container with the container options,
// expecting an error with the specified string
func testCreateFailureWithCgroupNs(t *testing.T, daemonNsMode string, errStr string, containerOpts ...func(*container.TestContainerConfig)) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
container.CreateExpectingErr(ctx, t, client, errStr, containerOpts...)
}
func TestCgroupNamespacesRun(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// should be in their own private cgroup namespace by default
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private")
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivileged(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
skip.If(t, testEnv.DaemonInfo.CgroupVersion == "2", "on cgroup v2, privileged containers use private cgroupns")
// When the daemon defaults to private cgroup namespaces, privileged containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunDaemonHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to host cgroup namespaces, containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "host")
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "host" should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("host"))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunPrivateMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "private" should be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivilegedAndPrivate(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true), container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunInvalidMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// An invalid cgroup namespace mode should return an error on container creation
errStr := "invalid cgroup namespace mode: invalid"
testCreateFailureWithCgroupNs(t, "private", errStr, container.WithCgroupnsMode("invalid"))
}
// Clients before 1.40 expect containers to be created in the host cgroup namespace,
// regardless of the default setting of the daemon, unless running with cgroup v2
func TestCgroupNamespacesRunOlderClient(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode("private"))
client := d.NewClientT(t, client.WithVersion("1.39"))
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := container.GetContainerNS(ctx, t, client, cID, "cgroup")
if testEnv.DaemonInfo.CgroupVersion != "2" {
assert.Assert(t, daemonCgroup == containerCgroup)
} else {
assert.Assert(t, daemonCgroup != containerCgroup)
}
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | This changes the code from reading `/proc/1/ns/cgroup` to `/proc/self/ns/cgroup` but the end result should be the same, so no issue here (just noticing). | kolyshkin | 5,060 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
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https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | integration/container/run_cgroupns_linux_test.go | package container // import "github.com/docker/docker/integration/container"
import (
"context"
"strings"
"testing"
"time"
"github.com/docker/docker/client"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/integration/internal/requirement"
"github.com/docker/docker/testutil/daemon"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
"gotest.tools/v3/poll"
"gotest.tools/v3/skip"
)
// Gets the value of the cgroup namespace for pid 1 of a container
func containerCgroupNamespace(ctx context.Context, t *testing.T, client *client.Client, cID string) string {
res, err := container.Exec(ctx, client, cID, []string{"readlink", "/proc/1/ns/cgroup"})
assert.NilError(t, err)
assert.Assert(t, is.Len(res.Stderr(), 0))
assert.Equal(t, 0, res.ExitCode)
return strings.TrimSpace(res.Stdout())
}
// Bring up a daemon with the specified default cgroup namespace mode, and then create a container with the container options
func testRunWithCgroupNs(t *testing.T, daemonNsMode string, containerOpts ...func(*container.TestContainerConfig)) (string, string) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client, containerOpts...)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := containerCgroupNamespace(ctx, t, client, cID)
return containerCgroup, daemonCgroup
}
// Bring up a daemon with the specified default cgroup namespace mode. Create a container with the container options,
// expecting an error with the specified string
func testCreateFailureWithCgroupNs(t *testing.T, daemonNsMode string, errStr string, containerOpts ...func(*container.TestContainerConfig)) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
container.CreateExpectingErr(ctx, t, client, errStr, containerOpts...)
}
func TestCgroupNamespacesRun(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// should be in their own private cgroup namespace by default
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private")
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivileged(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
skip.If(t, testEnv.DaemonInfo.CgroupVersion == "2", "on cgroup v2, privileged containers use private cgroupns")
// When the daemon defaults to private cgroup namespaces, privileged containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunDaemonHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to host cgroup namespaces, containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "host")
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "host" should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("host"))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunPrivateMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "private" should be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivilegedAndPrivate(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true), container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunInvalidMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// An invalid cgroup namespace mode should return an error on container creation
errStr := "invalid cgroup namespace mode: invalid"
testCreateFailureWithCgroupNs(t, "private", errStr, container.WithCgroupnsMode("invalid"))
}
// Clients before 1.40 expect containers to be created in the host cgroup namespace,
// regardless of the default setting of the daemon, unless running with cgroup v2
func TestCgroupNamespacesRunOlderClient(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode("private"))
client := d.NewClientT(t, client.WithVersion("1.39"))
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := containerCgroupNamespace(ctx, t, client, cID)
if testEnv.DaemonInfo.CgroupVersion != "2" {
assert.Assert(t, daemonCgroup == containerCgroup)
} else {
assert.Assert(t, daemonCgroup != containerCgroup)
}
}
| package container // import "github.com/docker/docker/integration/container"
import (
"context"
"testing"
"time"
"github.com/docker/docker/client"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/integration/internal/requirement"
"github.com/docker/docker/testutil/daemon"
"gotest.tools/v3/assert"
"gotest.tools/v3/poll"
"gotest.tools/v3/skip"
)
// Bring up a daemon with the specified default cgroup namespace mode, and then create a container with the container options
func testRunWithCgroupNs(t *testing.T, daemonNsMode string, containerOpts ...func(*container.TestContainerConfig)) (string, string) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client, containerOpts...)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := container.GetContainerNS(ctx, t, client, cID, "cgroup")
return containerCgroup, daemonCgroup
}
// Bring up a daemon with the specified default cgroup namespace mode. Create a container with the container options,
// expecting an error with the specified string
func testCreateFailureWithCgroupNs(t *testing.T, daemonNsMode string, errStr string, containerOpts ...func(*container.TestContainerConfig)) {
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode(daemonNsMode))
client := d.NewClientT(t)
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
container.CreateExpectingErr(ctx, t, client, errStr, containerOpts...)
}
func TestCgroupNamespacesRun(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// should be in their own private cgroup namespace by default
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private")
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivileged(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
skip.If(t, testEnv.DaemonInfo.CgroupVersion == "2", "on cgroup v2, privileged containers use private cgroupns")
// When the daemon defaults to private cgroup namespaces, privileged containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunDaemonHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to host cgroup namespaces, containers
// launched should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "host")
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunHostMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "host" should not be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("host"))
assert.Assert(t, daemonCgroup == containerCgroup)
}
func TestCgroupNamespacesRunPrivateMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// When the daemon defaults to private cgroup namespaces, containers launched
// with a cgroup ns mode of "private" should be inside their own cgroup namespaces
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunPrivilegedAndPrivate(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true), container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunInvalidMode(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// An invalid cgroup namespace mode should return an error on container creation
errStr := "invalid cgroup namespace mode: invalid"
testCreateFailureWithCgroupNs(t, "private", errStr, container.WithCgroupnsMode("invalid"))
}
// Clients before 1.40 expect containers to be created in the host cgroup namespace,
// regardless of the default setting of the daemon, unless running with cgroup v2
func TestCgroupNamespacesRunOlderClient(t *testing.T) {
skip.If(t, testEnv.DaemonInfo.OSType != "linux")
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
d := daemon.New(t, daemon.WithDefaultCgroupNamespaceMode("private"))
client := d.NewClientT(t, client.WithVersion("1.39"))
ctx := context.Background()
d.StartWithBusybox(t)
defer d.Stop(t)
cID := container.Run(ctx, t, client)
poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
daemonCgroup := d.CgroupNamespace(t)
containerCgroup := container.GetContainerNS(ctx, t, client, cID, "cgroup")
if testEnv.DaemonInfo.CgroupVersion != "2" {
assert.Assert(t, daemonCgroup == containerCgroup)
} else {
assert.Assert(t, daemonCgroup != containerCgroup)
}
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | Yes, I know. | AkihiroSuda | 5,061 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | Would this be more readable? (Not sure)
```suggestion
// Fix up /proc if --pid=host
ok, err := isPidHost(spec)
if err != nil {
return err
}
if !ok {
return nil
}
return bindMountHostProcfs(spec)
```
| thaJeztah | 5,062 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | This is linux specific, so can use `path` instead of `filepath`;
```suggestion
s = path.Clean(s)
``` | thaJeztah | 5,063 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | This can use `path.Clean` as well (instead of `filepath`. Do we want a fast-path here in case no cleaning is needed?
```suggestion
if m.Destination == "/proc" || path.Clean(m.Destination) == "/proc" {
``` | thaJeztah | 5,064 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | Not sure if premature optimisation, but could use https://github.com/golang/go/wiki/SliceTricks#filtering-without-allocating
```suggestion
newROP := spec.Linux.ReadonlyPaths[:0]
``` | thaJeztah | 5,065 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | That makes the code longer and I feel less readable, but just my feeling
| AkihiroSuda | 5,066 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | fixed | AkihiroSuda | 5,067 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | fixed | AkihiroSuda | 5,068 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | fixed | AkihiroSuda | 5,069 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | A little bit faster way would be to run stat on both paths and `return (st1.Dev == st2.Dev) && (st1.Ino == st2.Ino), nil`. Comparing symlinks is OK, too.
| kolyshkin | 5,070 |
moby/moby | 41,893 | rootless: support --pid=host | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
rootless: support --pid=host
Fix #41457
Also port `TestRunModePIDHost` from CLI test to API test
**- How I did it**
By substituting procfs mount with rbind (https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257)
**- How to verify it**
`DOCKER_ROOTLESS=1 TEST_SKIP_INTEGRATION_CLI=1 TESTFLAGS='-test.run TestPidHost' make test-integration`
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
rootless: support --pid=host
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin: | null | 2021-01-19 05:42:07+00:00 | 2021-04-06 05:30:41+00:00 | rootless/specconv/specconv_linux.go | package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
return nil
}
| package specconv // import "github.com/docker/docker/rootless/specconv"
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// ToRootless converts spec to be compatible with "rootless" runc.
// * Remove non-supported cgroups
// * Fix up OOMScoreAdj
// * Fix up /proc if --pid=host
//
// v2Controllers should be non-nil only if running with v2 and systemd.
func ToRootless(spec *specs.Spec, v2Controllers []string) error {
return toRootless(spec, v2Controllers, getCurrentOOMScoreAdj())
}
func getCurrentOOMScoreAdj() int {
b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
if err != nil {
logrus.WithError(err).Warn("failed to read /proc/self/oom_score_adj")
return 0
}
s := string(b)
i, err := strconv.Atoi(strings.TrimSpace(s))
if err != nil {
logrus.WithError(err).Warnf("failed to parse /proc/self/oom_score_adj (%q)", s)
return 0
}
return i
}
func toRootless(spec *specs.Spec, v2Controllers []string, currentOOMScoreAdj int) error {
if len(v2Controllers) == 0 {
// Remove cgroup settings.
spec.Linux.Resources = nil
spec.Linux.CgroupsPath = ""
} else {
if spec.Linux.Resources != nil {
m := make(map[string]struct{})
for _, s := range v2Controllers {
m[s] = struct{}{}
}
// Remove devices: https://github.com/containers/crun/issues/255
spec.Linux.Resources.Devices = nil
if _, ok := m["memory"]; !ok {
spec.Linux.Resources.Memory = nil
}
if _, ok := m["cpu"]; !ok {
spec.Linux.Resources.CPU = nil
}
if _, ok := m["cpuset"]; !ok {
if spec.Linux.Resources.CPU != nil {
spec.Linux.Resources.CPU.Cpus = ""
spec.Linux.Resources.CPU.Mems = ""
}
}
if _, ok := m["pids"]; !ok {
spec.Linux.Resources.Pids = nil
}
if _, ok := m["io"]; !ok {
spec.Linux.Resources.BlockIO = nil
}
if _, ok := m["rdma"]; !ok {
spec.Linux.Resources.Rdma = nil
}
spec.Linux.Resources.HugepageLimits = nil
spec.Linux.Resources.Network = nil
}
}
if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
*spec.Process.OOMScoreAdj = currentOOMScoreAdj
}
// Fix up /proc if --pid=host
pidHost, err := isPidHost(spec)
if err != nil {
return err
}
if !pidHost {
return nil
}
return bindMountHostProcfs(spec)
}
func isPidHost(spec *specs.Spec) (bool, error) {
for _, ns := range spec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
if ns.Path == "" {
return false, nil
}
pidNS, err := os.Readlink(ns.Path)
if err != nil {
return false, err
}
selfPidNS, err := os.Readlink("/proc/self/ns/pid")
if err != nil {
return false, err
}
return pidNS == selfPidNS, nil
}
}
return true, nil
}
func bindMountHostProcfs(spec *specs.Spec) error {
// Replace procfs mount with rbind
// https://github.com/containers/podman/blob/v3.0.0-rc1/pkg/specgen/generate/oci.go#L248-L257
for i, m := range spec.Mounts {
if path.Clean(m.Destination) == "/proc" {
newM := specs.Mount{
Destination: "/proc",
Type: "bind",
Source: "/proc",
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
}
spec.Mounts[i] = newM
}
}
// Remove ReadonlyPaths for /proc/*
newROP := spec.Linux.ReadonlyPaths[:0]
for _, s := range spec.Linux.ReadonlyPaths {
s = path.Clean(s)
if !strings.HasPrefix(s, "/proc/") {
newROP = append(newROP, s)
}
}
spec.Linux.ReadonlyPaths = newROP
return nil
}
| AkihiroSuda | dd14dbd53d1a49de58411a174e2314d2a2d33169 | c8ff7305f6ebc861d6918c4323060c9362bdf3ad | Too bad we don't have a spec requirement that the paths should be absolute and cleaned.
Hmm, a somewhat similar code in buildkit do not have `path.Clean()`:
https://github.com/moby/buildkit/blob/master/util/rootless/specconv/specconv_linux.go#L28-L29
So I'm not sure whether it is needed here. | kolyshkin | 5,071 |
moby/moby | 41,892 | pkg/archive: allow mknodding FIFO inside userns | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Fix #41803
Also attempt to mknod devices.
Mknodding devices are likely to fail, but still worth trying when running with a seccomp user notification.
**- How I did it**
By allowing mknodding FIFO inside userns.
**- How to verify it**
`docker pull docker.io/gitlab/gitlab-ee:13.6.3-ee.0` with rootless
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin:
| null | 2021-01-19 04:03:16+00:00 | 2021-01-28 07:26:06+00:00 | pkg/archive/archive_unix.go | // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
if sys.RunningInUserNS() {
// cannot create a device if running in user namespace
return nil
}
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
return system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
err := system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
if errors.Is(err, syscall.EPERM) && sys.RunningInUserNS() {
// In most cases, cannot create a device if running in user namespace
err = nil
}
return err
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| AkihiroSuda | e64651075d716f731cd5ef1d5b123c5a04313592 | e4224454186d33ceed8574eadb00465f5eb52298 | is there a specific error returned in here? | tonistiigi | 5,072 |
moby/moby | 41,892 | pkg/archive: allow mknodding FIFO inside userns | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Fix #41803
Also attempt to mknod devices.
Mknodding devices are likely to fail, but still worth trying when running with a seccomp user notification.
**- How I did it**
By allowing mknodding FIFO inside userns.
**- How to verify it**
`docker pull docker.io/gitlab/gitlab-ee:13.6.3-ee.0` with rootless
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin:
| null | 2021-01-19 04:03:16+00:00 | 2021-01-28 07:26:06+00:00 | pkg/archive/archive_unix.go | // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
if sys.RunningInUserNS() {
// cannot create a device if running in user namespace
return nil
}
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
return system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
err := system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
if errors.Is(err, syscall.EPERM) && sys.RunningInUserNS() {
// In most cases, cannot create a device if running in user namespace
err = nil
}
return err
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| AkihiroSuda | e64651075d716f731cd5ef1d5b123c5a04313592 | e4224454186d33ceed8574eadb00465f5eb52298 | Mknodding device nodes inside UserNS fails in most cases | AkihiroSuda | 5,073 |
moby/moby | 41,892 | pkg/archive: allow mknodding FIFO inside userns | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Fix #41803
Also attempt to mknod devices.
Mknodding devices are likely to fail, but still worth trying when running with a seccomp user notification.
**- How I did it**
By allowing mknodding FIFO inside userns.
**- How to verify it**
`docker pull docker.io/gitlab/gitlab-ee:13.6.3-ee.0` with rootless
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin:
| null | 2021-01-19 04:03:16+00:00 | 2021-01-28 07:26:06+00:00 | pkg/archive/archive_unix.go | // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
if sys.RunningInUserNS() {
// cannot create a device if running in user namespace
return nil
}
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
return system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
err := system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
if errors.Is(err, syscall.EPERM) && sys.RunningInUserNS() {
// In most cases, cannot create a device if running in user namespace
err = nil
}
return err
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| AkihiroSuda | e64651075d716f731cd5ef1d5b123c5a04313592 | e4224454186d33ceed8574eadb00465f5eb52298 | I think you usually get `EPERM`. | cyphar | 5,074 |
moby/moby | 41,892 | pkg/archive: allow mknodding FIFO inside userns | <!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/moby/moby/blob/master/CONTRIBUTING.md
** Make sure all your commits include a signature generated with `git commit -s` **
For additional information on our contributing process, read our contributing
guide https://docs.docker.com/opensource/code/
If this is a bug fix, make sure your description includes "fixes #xxxx", or
"closes #xxxx"
Please provide the following information:
-->
**- What I did**
Fix #41803
Also attempt to mknod devices.
Mknodding devices are likely to fail, but still worth trying when running with a seccomp user notification.
**- How I did it**
By allowing mknodding FIFO inside userns.
**- How to verify it**
`docker pull docker.io/gitlab/gitlab-ee:13.6.3-ee.0` with rootless
**- Description for the changelog**
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->
**- A picture of a cute animal (not mandatory but encouraged)**
:penguin:
| null | 2021-01-19 04:03:16+00:00 | 2021-01-28 07:26:06+00:00 | pkg/archive/archive_unix.go | // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
if sys.RunningInUserNS() {
// cannot create a device if running in user namespace
return nil
}
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
return system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| // +build !windows
package archive // import "github.com/docker/docker/pkg/archive"
import (
"archive/tar"
"errors"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/containerd/sys"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/system"
"golang.org/x/sys/unix"
)
// fixVolumePathPrefix does platform specific processing to ensure that if
// the path being passed in is not in a volume path format, convert it to one.
func fixVolumePathPrefix(srcPath string) string {
return srcPath
}
// getWalkRoot calculates the root path when performing a TarWithOptions.
// We use a separate function as this is platform specific. On Linux, we
// can't use filepath.Join(srcPath,include) because this will clean away
// a trailing "." or "/" which may be important.
func getWalkRoot(srcPath string, include string) string {
return strings.TrimSuffix(srcPath, string(filepath.Separator)) + string(filepath.Separator) + include
}
// CanonicalTarNameForPath returns platform-specific filepath
// to canonical posix-style path for tar archival. p is relative
// path.
func CanonicalTarNameForPath(p string) string {
return p // already unix-style
}
// chmodTarEntry is used to adjust the file permissions used in tar header based
// on the platform the archival is done.
func chmodTarEntry(perm os.FileMode) os.FileMode {
return perm // noop for unix as golang APIs provide perm bits correctly
}
func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
// Currently go does not fill in the major/minors
if s.Mode&unix.S_IFBLK != 0 ||
s.Mode&unix.S_IFCHR != 0 {
hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
}
}
return
}
func getInodeFromStat(stat interface{}) (inode uint64, err error) {
s, ok := stat.(*syscall.Stat_t)
if ok {
inode = s.Ino
}
return
}
func getFileUIDGID(stat interface{}) (idtools.Identity, error) {
s, ok := stat.(*syscall.Stat_t)
if !ok {
return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
}
return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
}
// handleTarTypeBlockCharFifo is an OS-specific helper function used by
// createTarFile to handle the following types of header: Block; Char; Fifo
func handleTarTypeBlockCharFifo(hdr *tar.Header, path string) error {
mode := uint32(hdr.Mode & 07777)
switch hdr.Typeflag {
case tar.TypeBlock:
mode |= unix.S_IFBLK
case tar.TypeChar:
mode |= unix.S_IFCHR
case tar.TypeFifo:
mode |= unix.S_IFIFO
}
err := system.Mknod(path, mode, int(system.Mkdev(hdr.Devmajor, hdr.Devminor)))
if errors.Is(err, syscall.EPERM) && sys.RunningInUserNS() {
// In most cases, cannot create a device if running in user namespace
err = nil
}
return err
}
func handleLChmod(hdr *tar.Header, path string, hdrInfo os.FileInfo) error {
if hdr.Typeflag == tar.TypeLink {
if fi, err := os.Lstat(hdr.Linkname); err == nil && (fi.Mode()&os.ModeSymlink == 0) {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
} else if hdr.Typeflag != tar.TypeSymlink {
if err := os.Chmod(path, hdrInfo.Mode()); err != nil {
return err
}
}
return nil
}
| AkihiroSuda | e64651075d716f731cd5ef1d5b123c5a04313592 | e4224454186d33ceed8574eadb00465f5eb52298 | updated | AkihiroSuda | 5,075 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | Should be cleaner to reset `Created` property and run `h.Created.Equal(i.Created)` for it specifically. | tonistiigi | 5,076 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | I considered doing that, but it would mean that 14:00:00+01:00 would equal 16:00:00+03:00, for example.
Since the difference between those times is preserved across Unmarshal/Marshal (unlike "+00:00" vs "Z") I went for this approach. | rcowsill | 5,077 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | (Thinking out loud); At a quick glance, I'd say that'd be correct 🤔; if we'd treat them as "different", that would mean that setting a different timezone on a server would be considered a different artefact even if the time was actually the same. | thaJeztah | 5,078 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | For a valid parent the histories being compared were copied directly from parent to child. The only difference is that the child's copies took an extra round trip through UnmarshalJSON/MarshalJSON. In that case I don't think changing the server TZ can change the result of the comparison.
That said, I'll take another look at Time.Unmarshal to make sure it isn't doing anything unexpected with the current TZ. | rcowsill | 5,079 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | @thaJeztah, here's what I found:
- The system timezone is read once per execution and cached; the new zone isn't used until the daemon restarts
- There's a quirk in the [unmarshaling of non-local times](https://play.golang.org/p/MnqaDk-7VnL) (doesn't affect checkValidParent as it uses reflect.DeepEqual)
These points don't have any negative impact on this approach or using time.Equal instead.
To clarify, I chose this approach as it only modifies behaviour in the specific case reported in #41829. Using time.Equal would fix that issue too, but it may have knock-on effects such as failing to detect a non-valid parent. | rcowsill | 5,080 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | Thanks!
> such as failing to detect a non-valid parent.
Let me defer that one to @tonistiigi as he's more familiar with this.
We should consider consistently using UTC for these. I did a very quick check on what variants are used in the code base; looks like many paths already use `.UTC()` or `.Unix()` (which implicitly uses UTC) when reading.
I found one place that didn't use UTC; opened https://github.com/moby/moby/pull/41905 for that.
| thaJeztah | 5,081 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | @thaJeztah I don't know if this is important, but buildkit uses local times (time.Now()) in the history when making new images. The legacy build system uses time.Now().UTC(). | rcowsill | 5,082 |
moby/moby | 41,884 | Fix spurious error from "docker load" | **- What I did**
Fixed the spurious error "...is not a valid parent for..." when using `docker load`. Closes #41829
**- How I did it**
Added an `Equal` method to History, which normalizes UTC-equivalent times into UTC before comparison. This is used instead of `reflect.DeepEqual` in checkValidParent.
**- How to verify it**
With the following Dockerfile, on a Windows machine:
```
FROM mcr.microsoft.com/windows/nanoserver:1809
CMD ["cmd", "/C", "echo hello world"]
```
1. Run `docker build -t test-image .`
2. Run `docker save -o images.tar test-image mcr.microsoft.com/windows/nanoserver:1809`
3. Run `docker load -i images.tar`
With the patch this should work without giving an "is not a valid parent for" error message in step 3.
**- Description for the changelog**
Fix "is not a valid parent for" error from `docker load`
**- A picture of a cute animal (not mandatory but encouraged)**
🦊 | null | 2021-01-14 15:04:54+00:00 | 2021-02-22 21:00:29+00:00 | image/image.go | package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| package image // import "github.com/docker/docker/image"
import (
"encoding/json"
"errors"
"io"
"reflect"
"runtime"
"strings"
"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/layer"
digest "github.com/opencontainers/go-digest"
)
// ID is the content-addressable ID of an image.
type ID digest.Digest
func (id ID) String() string {
return id.Digest().String()
}
// Digest converts ID into a digest
func (id ID) Digest() digest.Digest {
return digest.Digest(id)
}
// IDFromDigest creates an ID from a digest
func IDFromDigest(digest digest.Digest) ID {
return ID(digest)
}
// V1Image stores the V1 image configuration.
type V1Image struct {
// ID is a unique 64 character identifier of the image
ID string `json:"id,omitempty"`
// Parent is the ID of the parent image
Parent string `json:"parent,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Container is the id of the container used to commit
Container string `json:"container,omitempty"`
// ContainerConfig is the configuration of the container that is committed into the image
ContainerConfig container.Config `json:"container_config,omitempty"`
// DockerVersion specifies the version of Docker that was used to build the image
DockerVersion string `json:"docker_version,omitempty"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// Config is the configuration of the container received from the client
Config *container.Config `json:"config,omitempty"`
// Architecture is the hardware that the image is built and runs on
Architecture string `json:"architecture,omitempty"`
// Variant is the CPU architecture variant (presently ARM-only)
Variant string `json:"variant,omitempty"`
// OS is the operating system used to build and run the image
OS string `json:"os,omitempty"`
// Size is the total size of the image including all layers it is composed of
Size int64 `json:",omitempty"`
}
// Image stores the image configuration
type Image struct {
V1Image
Parent ID `json:"parent,omitempty"` //nolint:govet
RootFS *RootFS `json:"rootfs,omitempty"`
History []History `json:"history,omitempty"`
OSVersion string `json:"os.version,omitempty"`
OSFeatures []string `json:"os.features,omitempty"`
// rawJSON caches the immutable JSON associated with this image.
rawJSON []byte
// computedID is the ID computed from the hash of the image config.
// Not to be confused with the legacy V1 ID in V1Image.
computedID ID
}
// RawJSON returns the immutable JSON associated with the image.
func (img *Image) RawJSON() []byte {
return img.rawJSON
}
// ID returns the image's content-addressable ID.
func (img *Image) ID() ID {
return img.computedID
}
// ImageID stringifies ID.
func (img *Image) ImageID() string {
return img.ID().String()
}
// RunConfig returns the image's container config.
func (img *Image) RunConfig() *container.Config {
return img.Config
}
// BaseImgArch returns the image's architecture. If not populated, defaults to the host runtime arch.
func (img *Image) BaseImgArch() string {
arch := img.Architecture
if arch == "" {
arch = runtime.GOARCH
}
return arch
}
// BaseImgVariant returns the image's variant, whether populated or not.
// This avoids creating an inconsistency where the stored image variant
// is "greater than" (i.e. v8 vs v6) the actual image variant.
func (img *Image) BaseImgVariant() string {
return img.Variant
}
// OperatingSystem returns the image's operating system. If not populated, defaults to the host runtime OS.
func (img *Image) OperatingSystem() string {
os := img.OS
if os == "" {
os = runtime.GOOS
}
return os
}
// MarshalJSON serializes the image to JSON. It sorts the top-level keys so
// that JSON that's been manipulated by a push/pull cycle with a legacy
// registry won't end up with a different key order.
func (img *Image) MarshalJSON() ([]byte, error) {
type MarshalImage Image
pass1, err := json.Marshal(MarshalImage(*img))
if err != nil {
return nil, err
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(pass1, &c); err != nil {
return nil, err
}
return json.Marshal(c)
}
// ChildConfig is the configuration to apply to an Image to create a new
// Child image. Other properties of the image are copied from the parent.
type ChildConfig struct {
ContainerID string
Author string
Comment string
DiffID layer.DiffID
ContainerConfig *container.Config
Config *container.Config
}
// NewChildImage creates a new Image as a child of this image.
func NewChildImage(img *Image, child ChildConfig, os string) *Image {
isEmptyLayer := layer.IsEmpty(child.DiffID)
var rootFS *RootFS
if img.RootFS != nil {
rootFS = img.RootFS.Clone()
} else {
rootFS = NewRootFS()
}
if !isEmptyLayer {
rootFS.Append(child.DiffID)
}
imgHistory := NewHistory(
child.Author,
child.Comment,
strings.Join(child.ContainerConfig.Cmd, " "),
isEmptyLayer)
return &Image{
V1Image: V1Image{
DockerVersion: dockerversion.Version,
Config: child.Config,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
OS: os,
Container: child.ContainerID,
ContainerConfig: *child.ContainerConfig,
Author: child.Author,
Created: imgHistory.Created,
},
RootFS: rootFS,
History: append(img.History, imgHistory),
OSFeatures: img.OSFeatures,
OSVersion: img.OSVersion,
}
}
// History stores build commands that were used to create an image
type History struct {
// Created is the timestamp at which the image was created
Created time.Time `json:"created"`
// Author is the name of the author that was specified when committing the image
Author string `json:"author,omitempty"`
// CreatedBy keeps the Dockerfile command used while building the image
CreatedBy string `json:"created_by,omitempty"`
// Comment is the commit message that was set when committing the image
Comment string `json:"comment,omitempty"`
// EmptyLayer is set to true if this history item did not generate a
// layer. Otherwise, the history item is associated with the next
// layer in the RootFS section.
EmptyLayer bool `json:"empty_layer,omitempty"`
}
// NewHistory creates a new history struct from arguments, and sets the created
// time to the current time in UTC
func NewHistory(author, comment, createdBy string, isEmptyLayer bool) History {
return History{
Author: author,
Created: time.Now().UTC(),
CreatedBy: createdBy,
Comment: comment,
EmptyLayer: isEmptyLayer,
}
}
// Equal compares two history structs for equality
func (h History) Equal(i History) bool {
if !h.Created.Equal(i.Created) {
return false
}
i.Created = h.Created
return reflect.DeepEqual(h, i)
}
// Exporter provides interface for loading and saving images
type Exporter interface {
Load(io.ReadCloser, io.Writer, bool) error
// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
Save([]string, io.Writer) error
}
// NewFromJSON creates an Image configuration from json.
func NewFromJSON(src []byte) (*Image, error) {
img := &Image{}
if err := json.Unmarshal(src, img); err != nil {
return nil, err
}
if img.RootFS == nil {
return nil, errors.New("invalid image JSON, no RootFS key")
}
img.rawJSON = src
return img, nil
}
| rcowsill | 841600fb2b472304be44c6500221d4e2b8352295 | 4a054ec00f8e58a5efae0e809cd353d38d1146d1 | Interesting. Wondering if there was a reason for that, or if that was overlooked 🤔. For "internal" use, it probably wouldn't make a difference if `.Equal()` is used, mostly thinking about what will end up in JSON (manifests, local storage), and if _not_ using `.UTC()` would make things less reproducible/consistent. That said; fully "reproducible" is still hard, and may require things like `SOURCE_DATE_EPOCH` | thaJeztah | 5,083 |
moby/moby | 41,873 | Fix builder inconsistent error on buggy platform | addresses https://github.com/docker/for-linux/issues/1170
When pulling an image by platform, it is possible for the image's
configured platform to not match what was in the manifest list.
The image itself is buggy because either the manifest list is incorrect
or the image config is incorrect. In any case, this is preventing people
from upgrading because many times users do not have control over these
buggy images.
This was not a problem in 19.03 because we did not compare on platform
before. It just assumed if we had the image it was the one we wanted
regardless of platform, which has its own problems.
Example Dockerfile that has this problem:
```Dockerfile
FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
RUN echo hello
```
This fails the first time you try to build after it finishes pulling but
before performing the `RUN` command.
On the second attempt it works because the image is already there and
does not hit the code that errors out on platform mismatch (Actually it
ignores errors if an image is returned at all).
Must be run with the classic builder (DOCKER_BUILDKIT=0).
This should mostly be safe (and certainly safer than 19.03) since we only check this immediately after a pull.
Example output before the fix:
```
root@07d110f25ff1:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
image with reference k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0 was found but does not match the specified platform: wanted linux/arm64, actual: linux/amd64
root@07d110f25ff1:/go/src/github.com/docker/docker#
```
Example output after the fix:
```
root@34d494e751a0:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
WARNING: Pulled image with specified platform (linux/arm64), but resulting image's configured platform (linux/amd64) does not match.
This is most likely caused by a bug in the build system that created the fetched image (k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0).
Please notify the image author to correct the configuration.
---> ee124318448e
Step 2/2 : RUN echo hello
---> Running in 375eb8439033
hello
Removing intermediate container 375eb8439033
---> cd1060cadbce
Successfully built cd1060cadbce
Successfully tagged test:latest
``` | null | 2021-01-13 01:28:58+00:00 | 2021-01-21 15:23:29+00:00 | daemon/images/image_builder.go | package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
return i.GetImage(name, platform)
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
img, err := i.GetImage(name, platform)
if errdefs.IsNotFound(err) && img != nil && platform != nil {
imgPlat := specs.Platform{
OS: img.OS,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
}
p := *platform
if !platforms.Only(p).Match(imgPlat) {
po := streamformatter.NewJSONProgressOutput(output, false)
progress.Messagef(po, "", `
WARNING: Pulled image with specified platform (%s), but the resulting image's configured platform (%s) does not match.
This is most likely caused by a bug in the build system that created the fetched image (%s).
Please notify the image author to correct the configuration.`,
platforms.Format(p), platforms.Format(imgPlat), name,
)
logrus.WithError(err).WithField("image", name).Warn("Ignoring error about platform mismatch where the manifest list points to an image whose configuration does not match the platform in the manifest.")
err = nil
}
}
return img, err
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| cpuguy83 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | 44aacff3fc090f66b2c15776b4dfad60619b8a95 | Do you think it's worth logging image platform as well?
(not sure) | thaJeztah | 5,084 |
moby/moby | 41,873 | Fix builder inconsistent error on buggy platform | addresses https://github.com/docker/for-linux/issues/1170
When pulling an image by platform, it is possible for the image's
configured platform to not match what was in the manifest list.
The image itself is buggy because either the manifest list is incorrect
or the image config is incorrect. In any case, this is preventing people
from upgrading because many times users do not have control over these
buggy images.
This was not a problem in 19.03 because we did not compare on platform
before. It just assumed if we had the image it was the one we wanted
regardless of platform, which has its own problems.
Example Dockerfile that has this problem:
```Dockerfile
FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
RUN echo hello
```
This fails the first time you try to build after it finishes pulling but
before performing the `RUN` command.
On the second attempt it works because the image is already there and
does not hit the code that errors out on platform mismatch (Actually it
ignores errors if an image is returned at all).
Must be run with the classic builder (DOCKER_BUILDKIT=0).
This should mostly be safe (and certainly safer than 19.03) since we only check this immediately after a pull.
Example output before the fix:
```
root@07d110f25ff1:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
image with reference k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0 was found but does not match the specified platform: wanted linux/arm64, actual: linux/amd64
root@07d110f25ff1:/go/src/github.com/docker/docker#
```
Example output after the fix:
```
root@34d494e751a0:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
WARNING: Pulled image with specified platform (linux/arm64), but resulting image's configured platform (linux/amd64) does not match.
This is most likely caused by a bug in the build system that created the fetched image (k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0).
Please notify the image author to correct the configuration.
---> ee124318448e
Step 2/2 : RUN echo hello
---> Running in 375eb8439033
hello
Removing intermediate container 375eb8439033
---> cd1060cadbce
Successfully built cd1060cadbce
Successfully tagged test:latest
``` | null | 2021-01-13 01:28:58+00:00 | 2021-01-21 15:23:29+00:00 | daemon/images/image_builder.go | package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
return i.GetImage(name, platform)
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
img, err := i.GetImage(name, platform)
if errdefs.IsNotFound(err) && img != nil && platform != nil {
imgPlat := specs.Platform{
OS: img.OS,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
}
p := *platform
if !platforms.Only(p).Match(imgPlat) {
po := streamformatter.NewJSONProgressOutput(output, false)
progress.Messagef(po, "", `
WARNING: Pulled image with specified platform (%s), but the resulting image's configured platform (%s) does not match.
This is most likely caused by a bug in the build system that created the fetched image (%s).
Please notify the image author to correct the configuration.`,
platforms.Format(p), platforms.Format(imgPlat), name,
)
logrus.WithError(err).WithField("image", name).Warn("Ignoring error about platform mismatch where the manifest list points to an image whose configuration does not match the platform in the manifest.")
err = nil
}
}
return img, err
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| cpuguy83 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | 44aacff3fc090f66b2c15776b4dfad60619b8a95 | We can, but it is in the error message itself which we already have. | cpuguy83 | 5,085 |
moby/moby | 41,873 | Fix builder inconsistent error on buggy platform | addresses https://github.com/docker/for-linux/issues/1170
When pulling an image by platform, it is possible for the image's
configured platform to not match what was in the manifest list.
The image itself is buggy because either the manifest list is incorrect
or the image config is incorrect. In any case, this is preventing people
from upgrading because many times users do not have control over these
buggy images.
This was not a problem in 19.03 because we did not compare on platform
before. It just assumed if we had the image it was the one we wanted
regardless of platform, which has its own problems.
Example Dockerfile that has this problem:
```Dockerfile
FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
RUN echo hello
```
This fails the first time you try to build after it finishes pulling but
before performing the `RUN` command.
On the second attempt it works because the image is already there and
does not hit the code that errors out on platform mismatch (Actually it
ignores errors if an image is returned at all).
Must be run with the classic builder (DOCKER_BUILDKIT=0).
This should mostly be safe (and certainly safer than 19.03) since we only check this immediately after a pull.
Example output before the fix:
```
root@07d110f25ff1:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
image with reference k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0 was found but does not match the specified platform: wanted linux/arm64, actual: linux/amd64
root@07d110f25ff1:/go/src/github.com/docker/docker#
```
Example output after the fix:
```
root@34d494e751a0:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
WARNING: Pulled image with specified platform (linux/arm64), but resulting image's configured platform (linux/amd64) does not match.
This is most likely caused by a bug in the build system that created the fetched image (k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0).
Please notify the image author to correct the configuration.
---> ee124318448e
Step 2/2 : RUN echo hello
---> Running in 375eb8439033
hello
Removing intermediate container 375eb8439033
---> cd1060cadbce
Successfully built cd1060cadbce
Successfully tagged test:latest
``` | null | 2021-01-13 01:28:58+00:00 | 2021-01-21 15:23:29+00:00 | daemon/images/image_builder.go | package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
return i.GetImage(name, platform)
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
img, err := i.GetImage(name, platform)
if errdefs.IsNotFound(err) && img != nil && platform != nil {
imgPlat := specs.Platform{
OS: img.OS,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
}
p := *platform
if !platforms.Only(p).Match(imgPlat) {
po := streamformatter.NewJSONProgressOutput(output, false)
progress.Messagef(po, "", `
WARNING: Pulled image with specified platform (%s), but the resulting image's configured platform (%s) does not match.
This is most likely caused by a bug in the build system that created the fetched image (%s).
Please notify the image author to correct the configuration.`,
platforms.Format(p), platforms.Format(imgPlat), name,
)
logrus.WithError(err).WithField("image", name).Warn("Ignoring error about platform mismatch where the manifest list points to an image whose configuration does not match the platform in the manifest.")
err = nil
}
}
return img, err
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| cpuguy83 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | 44aacff3fc090f66b2c15776b4dfad60619b8a95 | ah, yes, makes sense | thaJeztah | 5,086 |
moby/moby | 41,873 | Fix builder inconsistent error on buggy platform | addresses https://github.com/docker/for-linux/issues/1170
When pulling an image by platform, it is possible for the image's
configured platform to not match what was in the manifest list.
The image itself is buggy because either the manifest list is incorrect
or the image config is incorrect. In any case, this is preventing people
from upgrading because many times users do not have control over these
buggy images.
This was not a problem in 19.03 because we did not compare on platform
before. It just assumed if we had the image it was the one we wanted
regardless of platform, which has its own problems.
Example Dockerfile that has this problem:
```Dockerfile
FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
RUN echo hello
```
This fails the first time you try to build after it finishes pulling but
before performing the `RUN` command.
On the second attempt it works because the image is already there and
does not hit the code that errors out on platform mismatch (Actually it
ignores errors if an image is returned at all).
Must be run with the classic builder (DOCKER_BUILDKIT=0).
This should mostly be safe (and certainly safer than 19.03) since we only check this immediately after a pull.
Example output before the fix:
```
root@07d110f25ff1:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
image with reference k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0 was found but does not match the specified platform: wanted linux/arm64, actual: linux/amd64
root@07d110f25ff1:/go/src/github.com/docker/docker#
```
Example output after the fix:
```
root@34d494e751a0:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
WARNING: Pulled image with specified platform (linux/arm64), but resulting image's configured platform (linux/amd64) does not match.
This is most likely caused by a bug in the build system that created the fetched image (k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0).
Please notify the image author to correct the configuration.
---> ee124318448e
Step 2/2 : RUN echo hello
---> Running in 375eb8439033
hello
Removing intermediate container 375eb8439033
---> cd1060cadbce
Successfully built cd1060cadbce
Successfully tagged test:latest
``` | null | 2021-01-13 01:28:58+00:00 | 2021-01-21 15:23:29+00:00 | daemon/images/image_builder.go | package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
return i.GetImage(name, platform)
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
img, err := i.GetImage(name, platform)
if errdefs.IsNotFound(err) && img != nil && platform != nil {
imgPlat := specs.Platform{
OS: img.OS,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
}
p := *platform
if !platforms.Only(p).Match(imgPlat) {
po := streamformatter.NewJSONProgressOutput(output, false)
progress.Messagef(po, "", `
WARNING: Pulled image with specified platform (%s), but the resulting image's configured platform (%s) does not match.
This is most likely caused by a bug in the build system that created the fetched image (%s).
Please notify the image author to correct the configuration.`,
platforms.Format(p), platforms.Format(imgPlat), name,
)
logrus.WithError(err).WithField("image", name).Warn("Ignoring error about platform mismatch where the manifest list points to an image whose configuration does not match the platform in the manifest.")
err = nil
}
}
return img, err
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| cpuguy83 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | 44aacff3fc090f66b2c15776b4dfad60619b8a95 | ```suggestion
`, platforms.Format(p), platforms.Format(imgPlat), name)
``` | thaJeztah | 5,087 |
moby/moby | 41,873 | Fix builder inconsistent error on buggy platform | addresses https://github.com/docker/for-linux/issues/1170
When pulling an image by platform, it is possible for the image's
configured platform to not match what was in the manifest list.
The image itself is buggy because either the manifest list is incorrect
or the image config is incorrect. In any case, this is preventing people
from upgrading because many times users do not have control over these
buggy images.
This was not a problem in 19.03 because we did not compare on platform
before. It just assumed if we had the image it was the one we wanted
regardless of platform, which has its own problems.
Example Dockerfile that has this problem:
```Dockerfile
FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
RUN echo hello
```
This fails the first time you try to build after it finishes pulling but
before performing the `RUN` command.
On the second attempt it works because the image is already there and
does not hit the code that errors out on platform mismatch (Actually it
ignores errors if an image is returned at all).
Must be run with the classic builder (DOCKER_BUILDKIT=0).
This should mostly be safe (and certainly safer than 19.03) since we only check this immediately after a pull.
Example output before the fix:
```
root@07d110f25ff1:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
image with reference k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0 was found but does not match the specified platform: wanted linux/arm64, actual: linux/amd64
root@07d110f25ff1:/go/src/github.com/docker/docker#
```
Example output after the fix:
```
root@34d494e751a0:/go/src/github.com/docker/docker# DOCKER_BUILDKIT=0 docker build -t test -< ./Dockerfile.fix
Sending build context to Docker daemon 2.048kB
Step 1/2 : FROM --platform=linux/arm64 k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
buster-v1.3.0: Pulling from build-image/debian-iptables
0b711604db4a: Pull complete
952e2ac66b7a: Pull complete
37e66e9a979e: Pull complete
c3cbd1f2e855: Pull complete
0e1a7dafc259: Pull complete
643e4c7dc28d: Pull complete
Digest: sha256:4c9410a4ee555dcb0e8b7bd6fc77c65ac400f7c5bd4555df8187630efaea6ea4
Status: Downloaded newer image for k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0
WARNING: Pulled image with specified platform (linux/arm64), but resulting image's configured platform (linux/amd64) does not match.
This is most likely caused by a bug in the build system that created the fetched image (k8s.gcr.io/build-image/debian-iptables:buster-v1.3.0).
Please notify the image author to correct the configuration.
---> ee124318448e
Step 2/2 : RUN echo hello
---> Running in 375eb8439033
hello
Removing intermediate container 375eb8439033
---> cd1060cadbce
Successfully built cd1060cadbce
Successfully tagged test:latest
``` | null | 2021-01-13 01:28:58+00:00 | 2021-01-21 15:23:29+00:00 | daemon/images/image_builder.go | package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
return i.GetImage(name, platform)
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| package images // import "github.com/docker/docker/daemon/images"
import (
"context"
"io"
"runtime"
"github.com/containerd/containerd/platforms"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/builder"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/pkg/containerfs"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
type roLayer struct {
released bool
layerStore layer.Store
roLayer layer.Layer
}
func (l *roLayer) DiffID() layer.DiffID {
if l.roLayer == nil {
return layer.DigestSHA256EmptyTar
}
return l.roLayer.DiffID()
}
func (l *roLayer) Release() error {
if l.released {
return nil
}
if l.roLayer != nil {
metadata, err := l.layerStore.Release(l.roLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release ROLayer")
}
}
l.roLayer = nil
l.released = true
return nil
}
func (l *roLayer) NewRWLayer() (builder.RWLayer, error) {
var chainID layer.ChainID
if l.roLayer != nil {
chainID = l.roLayer.ChainID()
}
mountID := stringid.GenerateRandomID()
newLayer, err := l.layerStore.CreateRWLayer(mountID, chainID, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to create rwlayer")
}
rwLayer := &rwLayer{layerStore: l.layerStore, rwLayer: newLayer}
fs, err := newLayer.Mount("")
if err != nil {
rwLayer.Release()
return nil, err
}
rwLayer.fs = fs
return rwLayer, nil
}
type rwLayer struct {
released bool
layerStore layer.Store
rwLayer layer.RWLayer
fs containerfs.ContainerFS
}
func (l *rwLayer) Root() containerfs.ContainerFS {
return l.fs
}
func (l *rwLayer) Commit() (builder.ROLayer, error) {
stream, err := l.rwLayer.TarStream()
if err != nil {
return nil, err
}
defer stream.Close()
var chainID layer.ChainID
if parent := l.rwLayer.Parent(); parent != nil {
chainID = parent.ChainID()
}
newLayer, err := l.layerStore.Register(stream, chainID)
if err != nil {
return nil, err
}
// TODO: An optimization would be to handle empty layers before returning
return &roLayer{layerStore: l.layerStore, roLayer: newLayer}, nil
}
func (l *rwLayer) Release() error {
if l.released {
return nil
}
if l.fs != nil {
if err := l.rwLayer.Unmount(); err != nil {
return errors.Wrap(err, "failed to unmount RWLayer")
}
l.fs = nil
}
metadata, err := l.layerStore.ReleaseRWLayer(l.rwLayer)
layer.LogReleaseMetadata(metadata)
if err != nil {
return errors.Wrap(err, "failed to release RWLayer")
}
l.released = true
return nil
}
func newROLayerForImage(img *image.Image, layerStore layer.Store) (builder.ROLayer, error) {
if img == nil || img.RootFS.ChainID() == "" {
return &roLayer{layerStore: layerStore}, nil
}
// Hold a reference to the image layer so that it can't be removed before
// it is released
layer, err := layerStore.Get(img.RootFS.ChainID())
if err != nil {
return nil, errors.Wrapf(err, "failed to get layer for image %s", img.ImageID())
}
return &roLayer{layerStore: layerStore, roLayer: layer}, nil
}
// TODO: could this use the regular daemon PullImage ?
func (i *ImageService) pullForBuilder(ctx context.Context, name string, authConfigs map[string]types.AuthConfig, output io.Writer, platform *specs.Platform) (*image.Image, error) {
ref, err := reference.ParseNormalizedNamed(name)
if err != nil {
return nil, err
}
ref = reference.TagNameOnly(ref)
pullRegistryAuth := &types.AuthConfig{}
if len(authConfigs) > 0 {
// The request came with a full auth config, use it
repoInfo, err := i.registryService.ResolveRepository(ref)
if err != nil {
return nil, err
}
resolvedConfig := registry.ResolveAuthConfig(authConfigs, repoInfo.Index)
pullRegistryAuth = &resolvedConfig
}
if err := i.pullImageWithReference(ctx, ref, platform, nil, pullRegistryAuth, output); err != nil {
return nil, err
}
img, err := i.GetImage(name, platform)
if errdefs.IsNotFound(err) && img != nil && platform != nil {
imgPlat := specs.Platform{
OS: img.OS,
Architecture: img.BaseImgArch(),
Variant: img.BaseImgVariant(),
}
p := *platform
if !platforms.Only(p).Match(imgPlat) {
po := streamformatter.NewJSONProgressOutput(output, false)
progress.Messagef(po, "", `
WARNING: Pulled image with specified platform (%s), but the resulting image's configured platform (%s) does not match.
This is most likely caused by a bug in the build system that created the fetched image (%s).
Please notify the image author to correct the configuration.`,
platforms.Format(p), platforms.Format(imgPlat), name,
)
logrus.WithError(err).WithField("image", name).Warn("Ignoring error about platform mismatch where the manifest list points to an image whose configuration does not match the platform in the manifest.")
err = nil
}
}
return img, err
}
// GetImageAndReleasableLayer returns an image and releaseable layer for a reference or ID.
// Every call to GetImageAndReleasableLayer MUST call releasableLayer.Release() to prevent
// leaking of layers.
func (i *ImageService) GetImageAndReleasableLayer(ctx context.Context, refOrID string, opts backend.GetImageAndLayerOptions) (builder.Image, builder.ROLayer, error) {
if refOrID == "" { // ie FROM scratch
os := runtime.GOOS
if runtime.GOOS == "windows" {
os = "linux"
}
if opts.Platform != nil {
os = opts.Platform.OS
}
if !system.IsOSSupported(os) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(nil, i.layerStores[os])
return nil, layer, err
}
if opts.PullOption != backend.PullOptionForcePull {
image, err := i.GetImage(refOrID, opts.Platform)
if err != nil && opts.PullOption == backend.PullOptionNoPull {
return nil, nil, err
}
// TODO: shouldn't we error out if error is different from "not found" ?
if image != nil {
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
}
image, err := i.pullForBuilder(ctx, refOrID, opts.AuthConfig, opts.Output, opts.Platform)
if err != nil {
return nil, nil, err
}
if !system.IsOSSupported(image.OperatingSystem()) {
return nil, nil, system.ErrNotSupportedOperatingSystem
}
layer, err := newROLayerForImage(image, i.layerStores[image.OperatingSystem()])
return image, layer, err
}
// CreateImage creates a new image by adding a config and ID to the image store.
// This is similar to LoadImage() except that it receives JSON encoded bytes of
// an image instead of a tar archive.
func (i *ImageService) CreateImage(config []byte, parent string) (builder.Image, error) {
id, err := i.imageStore.Create(config)
if err != nil {
return nil, errors.Wrapf(err, "failed to create image")
}
if parent != "" {
if err := i.imageStore.SetParent(id, image.ID(parent)); err != nil {
return nil, errors.Wrapf(err, "failed to set parent %s", parent)
}
}
return i.imageStore.Get(id)
}
| cpuguy83 | c0c3e58bb2b3714683658d331a138b2d80a6e974 | 44aacff3fc090f66b2c15776b4dfad60619b8a95 | Just create struct directly instead of parsing string | tonistiigi | 5,088 |
moby/moby | 41,869 | contrib/check-config.sh: fixes for cgroup v2 and kernel v5.x | fixes https://github.com/moby/moby/issues/41797
fixes https://github.com/moby/moby/issues/41798
1. contrib/check-config.sh: support for cgroupv2
Before:
> Generally Necessary:
> - cgroup hierarchy: nonexistent??
> (see https://github.com/tianon/cgroupfs-mount)
After:
> Generally Necessary:
> - cgroup hierarchy: cgroupv2
2. Make check for various CONFIG_* options recently removed from the kernel conditional.
See individual commits for details. | null | 2021-01-11 21:49:06+00:00 | 2021-01-13 02:25:05+00:00 | contrib/check-config.sh | #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
NF_NAT_IPV4 IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT NF_NAT_NEEDED
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
CODE=${EXITCODE}
check_flags MEMCG_SWAP MEMCG_SWAP_ENABLED
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING IOSCHED_CFQ CFQ_GROUP_IOSCHED
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
echo "$(wrap_good 'cgroup hierarchy' 'cgroupv2')"
else
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| kolyshkin | 5799d1c89c70373cf92e5ece5185321a30927d34 | cebc744e306c4614d0820d869569235a59428e0d | ```suggestion
if [ "$(stat -f -c %t /sys/fs/cgroup 2>/dev/null)" = '63677270' ]; then
``` | tianon | 5,089 |
moby/moby | 41,869 | contrib/check-config.sh: fixes for cgroup v2 and kernel v5.x | fixes https://github.com/moby/moby/issues/41797
fixes https://github.com/moby/moby/issues/41798
1. contrib/check-config.sh: support for cgroupv2
Before:
> Generally Necessary:
> - cgroup hierarchy: nonexistent??
> (see https://github.com/tianon/cgroupfs-mount)
After:
> Generally Necessary:
> - cgroup hierarchy: cgroupv2
2. Make check for various CONFIG_* options recently removed from the kernel conditional.
See individual commits for details. | null | 2021-01-11 21:49:06+00:00 | 2021-01-13 02:25:05+00:00 | contrib/check-config.sh | #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
NF_NAT_IPV4 IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT NF_NAT_NEEDED
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
CODE=${EXITCODE}
check_flags MEMCG_SWAP MEMCG_SWAP_ENABLED
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING IOSCHED_CFQ CFQ_GROUP_IOSCHED
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
echo "$(wrap_good 'cgroup hierarchy' 'cgroupv2')"
else
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| kolyshkin | 5799d1c89c70373cf92e5ece5185321a30927d34 | cebc744e306c4614d0820d869569235a59428e0d | Actually looks like shfmt validation is failing on this; it expects a space after `2>`; might indeed as well change to single quotes while at it
```suggestion
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
``` | thaJeztah | 5,090 |
moby/moby | 41,869 | contrib/check-config.sh: fixes for cgroup v2 and kernel v5.x | fixes https://github.com/moby/moby/issues/41797
fixes https://github.com/moby/moby/issues/41798
1. contrib/check-config.sh: support for cgroupv2
Before:
> Generally Necessary:
> - cgroup hierarchy: nonexistent??
> (see https://github.com/tianon/cgroupfs-mount)
After:
> Generally Necessary:
> - cgroup hierarchy: cgroupv2
2. Make check for various CONFIG_* options recently removed from the kernel conditional.
See individual commits for details. | null | 2021-01-11 21:49:06+00:00 | 2021-01-13 02:25:05+00:00 | contrib/check-config.sh | #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
NF_NAT_IPV4 IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT NF_NAT_NEEDED
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
CODE=${EXITCODE}
check_flags MEMCG_SWAP MEMCG_SWAP_ENABLED
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING IOSCHED_CFQ CFQ_GROUP_IOSCHED
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
echo "$(wrap_good 'cgroup hierarchy' 'cgroupv2')"
else
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| kolyshkin | 5799d1c89c70373cf92e5ece5185321a30927d34 | cebc744e306c4614d0820d869569235a59428e0d | fixed | kolyshkin | 5,091 |
moby/moby | 41,869 | contrib/check-config.sh: fixes for cgroup v2 and kernel v5.x | fixes https://github.com/moby/moby/issues/41797
fixes https://github.com/moby/moby/issues/41798
1. contrib/check-config.sh: support for cgroupv2
Before:
> Generally Necessary:
> - cgroup hierarchy: nonexistent??
> (see https://github.com/tianon/cgroupfs-mount)
After:
> Generally Necessary:
> - cgroup hierarchy: cgroupv2
2. Make check for various CONFIG_* options recently removed from the kernel conditional.
See individual commits for details. | null | 2021-01-11 21:49:06+00:00 | 2021-01-13 02:25:05+00:00 | contrib/check-config.sh | #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
NF_NAT_IPV4 IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT NF_NAT_NEEDED
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
CODE=${EXITCODE}
check_flags MEMCG_SWAP MEMCG_SWAP_ENABLED
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING IOSCHED_CFQ CFQ_GROUP_IOSCHED
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| #!/usr/bin/env bash
set -e
EXITCODE=0
# bits of this were adapted from lxc-checkconfig
# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
possibleConfigs=(
'/proc/config.gz'
"/boot/config-$(uname -r)"
"/usr/src/linux-$(uname -r)/.config"
'/usr/src/linux/.config'
)
if [ $# -gt 0 ]; then
CONFIG="$1"
else
: "${CONFIG:="${possibleConfigs[0]}"}"
fi
if ! command -v zgrep &> /dev/null; then
zgrep() {
zcat "$2" | grep "$1"
}
fi
kernelVersion="$(uname -r)"
kernelMajor="${kernelVersion%%.*}"
kernelMinor="${kernelVersion#$kernelMajor.}"
kernelMinor="${kernelMinor%%.*}"
is_set() {
zgrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null
}
is_set_in_kernel() {
zgrep "CONFIG_$1=y" "$CONFIG" > /dev/null
}
is_set_as_module() {
zgrep "CONFIG_$1=m" "$CONFIG" > /dev/null
}
color() {
local codes=()
if [ "$1" = 'bold' ]; then
codes=("${codes[@]}" '1')
shift
fi
if [ "$#" -gt 0 ]; then
local code=
case "$1" in
# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
black) code=30 ;;
red) code=31 ;;
green) code=32 ;;
yellow) code=33 ;;
blue) code=34 ;;
magenta) code=35 ;;
cyan) code=36 ;;
white) code=37 ;;
esac
if [ "$code" ]; then
codes=("${codes[@]}" "$code")
fi
fi
local IFS=';'
echo -en '\033['"${codes[*]}"'m'
}
wrap_color() {
text="$1"
shift
color "$@"
echo -n "$text"
color reset
echo
}
wrap_good() {
echo "$(wrap_color "$1" white): $(wrap_color "$2" green)"
}
wrap_bad() {
echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)"
}
wrap_warning() {
wrap_color >&2 "$*" red
}
check_flag() {
if is_set_in_kernel "$1"; then
wrap_good "CONFIG_$1" 'enabled'
elif is_set_as_module "$1"; then
wrap_good "CONFIG_$1" 'enabled (as module)'
else
wrap_bad "CONFIG_$1" 'missing'
EXITCODE=1
fi
}
check_flags() {
for flag in "$@"; do
echo -n "- "
check_flag "$flag"
done
}
check_command() {
if command -v "$1" > /dev/null 2>&1; then
wrap_good "$1 command" 'available'
else
wrap_bad "$1 command" 'missing'
EXITCODE=1
fi
}
check_device() {
if [ -c "$1" ]; then
wrap_good "$1" 'present'
else
wrap_bad "$1" 'missing'
EXITCODE=1
fi
}
check_distro_userns() {
source /etc/os-release 2> /dev/null || /bin/true
if [[ "${ID}" =~ ^(centos|rhel)$ && "${VERSION_ID}" =~ ^7 ]]; then
# this is a CentOS7 or RHEL7 system
grep -q "user_namespace.enable=1" /proc/cmdline || {
# no user namespace support enabled
wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
EXITCODE=1
}
fi
}
if [ ! -e "$CONFIG" ]; then
wrap_warning "warning: $CONFIG does not exist, searching other paths for kernel config ..."
for tryConfig in "${possibleConfigs[@]}"; do
if [ -e "$tryConfig" ]; then
CONFIG="$tryConfig"
break
fi
done
if [ ! -e "$CONFIG" ]; then
wrap_warning "error: cannot find kernel config"
wrap_warning " try running this script again, specifying the kernel config:"
wrap_warning " CONFIG=/path/to/kernel/.config $0 or $0 /path/to/kernel/.config"
exit 1
fi
fi
wrap_color "info: reading kernel config from $CONFIG ..." white
echo
echo 'Generally Necessary:'
echo -n '- '
if [ "$(stat -f -c %t /sys/fs/cgroup 2> /dev/null)" = '63677270' ]; then
echo "$(wrap_good 'cgroup hierarchy' 'cgroupv2')"
else
cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)"
cgroupDir="$(dirname "$cgroupSubsystemDir")"
if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then
echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]"
else
if [ "$cgroupSubsystemDir" ]; then
echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]"
else
wrap_bad 'cgroup hierarchy' 'nonexistent??'
fi
EXITCODE=1
echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
fi
fi
if [ "$(cat /sys/module/apparmor/parameters/enabled 2> /dev/null)" = 'Y' ]; then
echo -n '- '
if command -v apparmor_parser &> /dev/null; then
wrap_good 'apparmor' 'enabled and tools installed'
else
wrap_bad 'apparmor' 'enabled, but apparmor_parser missing'
echo -n ' '
if command -v apt-get &> /dev/null; then
wrap_color '(use "apt-get install apparmor" to fix this)'
elif command -v yum &> /dev/null; then
wrap_color '(your best bet is "yum install apparmor-parser")'
else
wrap_color '(look for an "apparmor" package for your distribution)'
fi
EXITCODE=1
fi
fi
flags=(
NAMESPACES {NET,PID,IPC,UTS}_NS
CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG
KEYS
VETH BRIDGE BRIDGE_NETFILTER
IP_NF_FILTER IP_NF_TARGET_MASQUERADE
NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK,IPVS}
IP_NF_NAT NF_NAT
# required for bind-mounting /dev/mqueue into containers
POSIX_MQUEUE
)
check_flags "${flags[@]}"
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ]); then
check_flags DEVPTS_MULTIPLE_INSTANCES
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 1 ]; then
check_flags NF_NAT_IPV4
fi
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 2 ]; then
check_flags NF_NAT_NEEDED
fi
echo
echo 'Optional Features:'
{
check_flags USER_NS
check_distro_userns
}
{
check_flags SECCOMP
}
{
check_flags CGROUP_PIDS
}
{
check_flags MEMCG_SWAP
# Kernel v5.8+ removes MEMCG_SWAP_ENABLED.
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 8 ]; then
CODE=${EXITCODE}
check_flags MEMCG_SWAP_ENABLED
# FIXME this check is cgroupv1-specific
if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
EXITCODE=${CODE}
elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then
echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi
else
# Kernel v5.8+ enables swap accounting by default.
echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)"
fi
}
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)"
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "
wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "
wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || ([ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ]); then
check_flags MEMCG_KMEM
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ]); then
check_flags RESOURCE_COUNTERS
fi
if [ "$kernelMajor" -lt 3 ] || ([ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ]); then
netprio=NETPRIO_CGROUP
else
netprio=CGROUP_NET_PRIO
fi
if [ "$kernelMajor" -lt 5 ]; then
check_flags IOSCHED_CFQ CFQ_GROUP_IOSCHED
fi
flags=(
BLK_CGROUP BLK_DEV_THROTTLING
CGROUP_PERF
CGROUP_HUGETLB
NET_CLS_CGROUP $netprio
CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED
IP_NF_TARGET_REDIRECT
IP_VS
IP_VS_NFCT
IP_VS_PROTO_TCP
IP_VS_PROTO_UDP
IP_VS_RR
)
check_flags "${flags[@]}"
if ! is_set EXT4_USE_FOR_EXT2; then
check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY
if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then
echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)"
fi
fi
check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY
if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then
if is_set EXT4_USE_FOR_EXT2; then
echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)"
else
echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)"
fi
fi
echo '- Network Drivers:'
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags VXLAN BRIDGE_VLAN_FILTERING | sed 's/^/ /'
echo ' Optional (for encrypted networks):'
check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
XFRM XFRM_USER XFRM_ALGO INET_ESP | sed 's/^/ /'
if [ "$kernelMajor" -lt 5 ] || [ "$kernelMajor" -eq 5 -a "$kernelMinor" -le 3 ]; then
check_flags INET_XFRM_MODE_TRANSPORT | sed 's/^/ /'
fi
echo " - \"$(wrap_color 'ipvlan' blue)\":"
check_flags IPVLAN | sed 's/^/ /'
echo " - \"$(wrap_color 'macvlan' blue)\":"
check_flags MACVLAN DUMMY | sed 's/^/ /'
echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":"
check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /'
# only fail if no storage drivers available
CODE=${EXITCODE}
EXITCODE=0
STORAGE=1
echo '- Storage Drivers:'
echo " - \"$(wrap_color 'aufs' blue)\":"
check_flags AUFS_FS | sed 's/^/ /'
if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
echo " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
fi
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'btrfs' blue)\":"
check_flags BTRFS_FS | sed 's/^/ /'
check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'devicemapper' blue)\":"
check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'overlay' blue)\":"
check_flags OVERLAY_FS | sed 's/^/ /'
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
echo " - \"$(wrap_color 'zfs' blue)\":"
echo -n " - "
check_device /dev/zfs
echo -n " - "
check_command zfs
echo -n " - "
check_command zpool
[ "$EXITCODE" = 0 ] && STORAGE=0
EXITCODE=0
EXITCODE=$CODE
[ "$STORAGE" = 1 ] && EXITCODE=1
echo
check_limit_over() {
if [ "$(cat "$1")" -le "$2" ]; then
wrap_bad "- $1" "$(cat "$1")"
wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
EXITCODE=1
else
wrap_good "- $1" "$(cat "$1")"
fi
}
echo 'Limits:'
check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
echo
exit $EXITCODE
| kolyshkin | 5799d1c89c70373cf92e5ece5185321a30927d34 | cebc744e306c4614d0820d869569235a59428e0d | fixed | kolyshkin | 5,092 |
moby/moby | 41,863 | builder: ensure libnetwork state files do not leak | Apparently calling `sandbox.Delete` is not enough to remove all the libnetwork state files, eg. the hosts and resolv.conf file. So to avoid leaks clean up the sandbox state directory manually.
Looking at what happens on regular containers, it seems that netns is cleaned up by finalized and not directly by code. This could be investigated more in the future as could leak on restarts etc. The hosts/resolv.conf is stored in container state directory and cleaned up with container afaics.
Signed-off-by: Tonis Tiigi <[email protected]>
| null | 2021-01-07 06:52:36+00:00 | 2021-01-08 19:03:00+00:00 | builder/builder-next/executor_unix.go | // +build !windows
package buildkit
import (
"os"
"path/filepath"
"strconv"
"sync"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/libnetwork"
"github.com/moby/buildkit/executor"
"github.com/moby/buildkit/executor/oci"
"github.com/moby/buildkit/executor/runcexecutor"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/network"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
const networkName = "bridge"
func newExecutor(root, cgroupParent string, net libnetwork.NetworkController, dnsConfig *oci.DNSConfig, rootless bool, idmap *idtools.IdentityMapping) (executor.Executor, error) {
networkProviders := map[pb.NetMode]network.Provider{
pb.NetMode_UNSET: &bridgeProvider{NetworkController: net, Root: filepath.Join(root, "net")},
pb.NetMode_HOST: network.NewHostProvider(),
pb.NetMode_NONE: network.NewNoneProvider(),
}
return runcexecutor.New(runcexecutor.Opt{
Root: filepath.Join(root, "executor"),
CommandCandidates: []string{"runc"},
DefaultCgroupParent: cgroupParent,
Rootless: rootless,
NoPivot: os.Getenv("DOCKER_RAMDISK") != "",
IdentityMapping: idmap,
DNS: dnsConfig,
}, networkProviders)
}
type bridgeProvider struct {
libnetwork.NetworkController
Root string
}
func (p *bridgeProvider) New() (network.Namespace, error) {
n, err := p.NetworkByName(networkName)
if err != nil {
return nil, err
}
iface := &lnInterface{ready: make(chan struct{}), provider: p}
iface.Once.Do(func() {
go iface.init(p.NetworkController, n)
})
return iface, nil
}
type lnInterface struct {
ep libnetwork.Endpoint
sbx libnetwork.Sandbox
sync.Once
err error
ready chan struct{}
provider *bridgeProvider
}
func (iface *lnInterface) init(c libnetwork.NetworkController, n libnetwork.Network) {
defer close(iface.ready)
id := identity.NewID()
ep, err := n.CreateEndpoint(id, libnetwork.CreateOptionDisableResolution())
if err != nil {
iface.err = err
return
}
sbx, err := c.NewSandbox(id, libnetwork.OptionUseExternalKey(), libnetwork.OptionHostsPath(filepath.Join(iface.provider.Root, id, "hosts")),
libnetwork.OptionResolvConfPath(filepath.Join(iface.provider.Root, id, "resolv.conf")))
if err != nil {
iface.err = err
return
}
if err := ep.Join(sbx); err != nil {
iface.err = err
return
}
iface.sbx = sbx
iface.ep = ep
}
func (iface *lnInterface) Set(s *specs.Spec) error {
<-iface.ready
if iface.err != nil {
logrus.WithError(iface.err).Error("failed to set networking spec")
return iface.err
}
shortNetCtlrID := stringid.TruncateID(iface.provider.NetworkController.ID())
// attach netns to bridge within the container namespace, using reexec in a prestart hook
s.Hooks = &specs.Hooks{
Prestart: []specs.Hook{{
Path: filepath.Join("/proc", strconv.Itoa(os.Getpid()), "exe"),
Args: []string{"libnetwork-setkey", "-exec-root=" + iface.provider.Config().Daemon.ExecRoot, iface.sbx.ContainerID(), shortNetCtlrID},
}},
}
return nil
}
func (iface *lnInterface) Close() error {
<-iface.ready
if iface.sbx != nil {
go func() {
if err := iface.sbx.Delete(); err != nil {
logrus.Errorf("failed to delete builder network sandbox: %v", err)
}
}()
}
return iface.err
}
func getDNSConfig(cfg config.DNSConfig) *oci.DNSConfig {
if cfg.DNS != nil || cfg.DNSSearch != nil || cfg.DNSOptions != nil {
return &oci.DNSConfig{
Nameservers: cfg.DNS,
SearchDomains: cfg.DNSSearch,
Options: cfg.DNSOptions,
}
}
return nil
}
| // +build !windows
package buildkit
import (
"io/ioutil"
"os"
"path/filepath"
"strconv"
"sync"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/libnetwork"
"github.com/moby/buildkit/executor"
"github.com/moby/buildkit/executor/oci"
"github.com/moby/buildkit/executor/runcexecutor"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/network"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
const networkName = "bridge"
func newExecutor(root, cgroupParent string, net libnetwork.NetworkController, dnsConfig *oci.DNSConfig, rootless bool, idmap *idtools.IdentityMapping) (executor.Executor, error) {
netRoot := filepath.Join(root, "net")
networkProviders := map[pb.NetMode]network.Provider{
pb.NetMode_UNSET: &bridgeProvider{NetworkController: net, Root: netRoot},
pb.NetMode_HOST: network.NewHostProvider(),
pb.NetMode_NONE: network.NewNoneProvider(),
}
// make sure net state directory is cleared from previous state
fis, err := ioutil.ReadDir(netRoot)
if err == nil {
for _, fi := range fis {
fp := filepath.Join(netRoot, fi.Name())
if err := os.RemoveAll(fp); err != nil {
logrus.WithError(err).Errorf("failed to delete old network state: %v", fp)
}
}
}
return runcexecutor.New(runcexecutor.Opt{
Root: filepath.Join(root, "executor"),
CommandCandidates: []string{"runc"},
DefaultCgroupParent: cgroupParent,
Rootless: rootless,
NoPivot: os.Getenv("DOCKER_RAMDISK") != "",
IdentityMapping: idmap,
DNS: dnsConfig,
}, networkProviders)
}
type bridgeProvider struct {
libnetwork.NetworkController
Root string
}
func (p *bridgeProvider) New() (network.Namespace, error) {
n, err := p.NetworkByName(networkName)
if err != nil {
return nil, err
}
iface := &lnInterface{ready: make(chan struct{}), provider: p}
iface.Once.Do(func() {
go iface.init(p.NetworkController, n)
})
return iface, nil
}
type lnInterface struct {
ep libnetwork.Endpoint
sbx libnetwork.Sandbox
sync.Once
err error
ready chan struct{}
provider *bridgeProvider
}
func (iface *lnInterface) init(c libnetwork.NetworkController, n libnetwork.Network) {
defer close(iface.ready)
id := identity.NewID()
ep, err := n.CreateEndpoint(id, libnetwork.CreateOptionDisableResolution())
if err != nil {
iface.err = err
return
}
sbx, err := c.NewSandbox(id, libnetwork.OptionUseExternalKey(), libnetwork.OptionHostsPath(filepath.Join(iface.provider.Root, id, "hosts")),
libnetwork.OptionResolvConfPath(filepath.Join(iface.provider.Root, id, "resolv.conf")))
if err != nil {
iface.err = err
return
}
if err := ep.Join(sbx); err != nil {
iface.err = err
return
}
iface.sbx = sbx
iface.ep = ep
}
func (iface *lnInterface) Set(s *specs.Spec) error {
<-iface.ready
if iface.err != nil {
logrus.WithError(iface.err).Error("failed to set networking spec")
return iface.err
}
shortNetCtlrID := stringid.TruncateID(iface.provider.NetworkController.ID())
// attach netns to bridge within the container namespace, using reexec in a prestart hook
s.Hooks = &specs.Hooks{
Prestart: []specs.Hook{{
Path: filepath.Join("/proc", strconv.Itoa(os.Getpid()), "exe"),
Args: []string{"libnetwork-setkey", "-exec-root=" + iface.provider.Config().Daemon.ExecRoot, iface.sbx.ContainerID(), shortNetCtlrID},
}},
}
return nil
}
func (iface *lnInterface) Close() error {
<-iface.ready
if iface.sbx != nil {
go func() {
if err := iface.sbx.Delete(); err != nil {
logrus.WithError(err).Errorf("failed to delete builder network sandbox")
}
if err := os.RemoveAll(filepath.Join(iface.provider.Root, iface.sbx.ContainerID())); err != nil {
logrus.WithError(err).Errorf("failed to delete builder sandbox directory")
}
}()
}
return iface.err
}
func getDNSConfig(cfg config.DNSConfig) *oci.DNSConfig {
if cfg.DNS != nil || cfg.DNSSearch != nil || cfg.DNSOptions != nil {
return &oci.DNSConfig{
Nameservers: cfg.DNS,
SearchDomains: cfg.DNSSearch,
Options: cfg.DNSOptions,
}
}
return nil
}
| tonistiigi | e5275087b2fac376cc1554f91801bd27fab1f225 | cd049777a21bc17bcedd5eec95ace65bbba833cf | While at it, perhaps use `WithError()` here as well
```suggestion
logrus.WithError(err).Error("failed to delete builder sandbox directory")
``` | thaJeztah | 5,093 |
moby/moby | 41,863 | builder: ensure libnetwork state files do not leak | Apparently calling `sandbox.Delete` is not enough to remove all the libnetwork state files, eg. the hosts and resolv.conf file. So to avoid leaks clean up the sandbox state directory manually.
Looking at what happens on regular containers, it seems that netns is cleaned up by finalized and not directly by code. This could be investigated more in the future as could leak on restarts etc. The hosts/resolv.conf is stored in container state directory and cleaned up with container afaics.
Signed-off-by: Tonis Tiigi <[email protected]>
| null | 2021-01-07 06:52:36+00:00 | 2021-01-08 19:03:00+00:00 | builder/builder-next/executor_unix.go | // +build !windows
package buildkit
import (
"os"
"path/filepath"
"strconv"
"sync"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/libnetwork"
"github.com/moby/buildkit/executor"
"github.com/moby/buildkit/executor/oci"
"github.com/moby/buildkit/executor/runcexecutor"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/network"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
const networkName = "bridge"
func newExecutor(root, cgroupParent string, net libnetwork.NetworkController, dnsConfig *oci.DNSConfig, rootless bool, idmap *idtools.IdentityMapping) (executor.Executor, error) {
networkProviders := map[pb.NetMode]network.Provider{
pb.NetMode_UNSET: &bridgeProvider{NetworkController: net, Root: filepath.Join(root, "net")},
pb.NetMode_HOST: network.NewHostProvider(),
pb.NetMode_NONE: network.NewNoneProvider(),
}
return runcexecutor.New(runcexecutor.Opt{
Root: filepath.Join(root, "executor"),
CommandCandidates: []string{"runc"},
DefaultCgroupParent: cgroupParent,
Rootless: rootless,
NoPivot: os.Getenv("DOCKER_RAMDISK") != "",
IdentityMapping: idmap,
DNS: dnsConfig,
}, networkProviders)
}
type bridgeProvider struct {
libnetwork.NetworkController
Root string
}
func (p *bridgeProvider) New() (network.Namespace, error) {
n, err := p.NetworkByName(networkName)
if err != nil {
return nil, err
}
iface := &lnInterface{ready: make(chan struct{}), provider: p}
iface.Once.Do(func() {
go iface.init(p.NetworkController, n)
})
return iface, nil
}
type lnInterface struct {
ep libnetwork.Endpoint
sbx libnetwork.Sandbox
sync.Once
err error
ready chan struct{}
provider *bridgeProvider
}
func (iface *lnInterface) init(c libnetwork.NetworkController, n libnetwork.Network) {
defer close(iface.ready)
id := identity.NewID()
ep, err := n.CreateEndpoint(id, libnetwork.CreateOptionDisableResolution())
if err != nil {
iface.err = err
return
}
sbx, err := c.NewSandbox(id, libnetwork.OptionUseExternalKey(), libnetwork.OptionHostsPath(filepath.Join(iface.provider.Root, id, "hosts")),
libnetwork.OptionResolvConfPath(filepath.Join(iface.provider.Root, id, "resolv.conf")))
if err != nil {
iface.err = err
return
}
if err := ep.Join(sbx); err != nil {
iface.err = err
return
}
iface.sbx = sbx
iface.ep = ep
}
func (iface *lnInterface) Set(s *specs.Spec) error {
<-iface.ready
if iface.err != nil {
logrus.WithError(iface.err).Error("failed to set networking spec")
return iface.err
}
shortNetCtlrID := stringid.TruncateID(iface.provider.NetworkController.ID())
// attach netns to bridge within the container namespace, using reexec in a prestart hook
s.Hooks = &specs.Hooks{
Prestart: []specs.Hook{{
Path: filepath.Join("/proc", strconv.Itoa(os.Getpid()), "exe"),
Args: []string{"libnetwork-setkey", "-exec-root=" + iface.provider.Config().Daemon.ExecRoot, iface.sbx.ContainerID(), shortNetCtlrID},
}},
}
return nil
}
func (iface *lnInterface) Close() error {
<-iface.ready
if iface.sbx != nil {
go func() {
if err := iface.sbx.Delete(); err != nil {
logrus.Errorf("failed to delete builder network sandbox: %v", err)
}
}()
}
return iface.err
}
func getDNSConfig(cfg config.DNSConfig) *oci.DNSConfig {
if cfg.DNS != nil || cfg.DNSSearch != nil || cfg.DNSOptions != nil {
return &oci.DNSConfig{
Nameservers: cfg.DNS,
SearchDomains: cfg.DNSSearch,
Options: cfg.DNSOptions,
}
}
return nil
}
| // +build !windows
package buildkit
import (
"io/ioutil"
"os"
"path/filepath"
"strconv"
"sync"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/libnetwork"
"github.com/moby/buildkit/executor"
"github.com/moby/buildkit/executor/oci"
"github.com/moby/buildkit/executor/runcexecutor"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/network"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
const networkName = "bridge"
func newExecutor(root, cgroupParent string, net libnetwork.NetworkController, dnsConfig *oci.DNSConfig, rootless bool, idmap *idtools.IdentityMapping) (executor.Executor, error) {
netRoot := filepath.Join(root, "net")
networkProviders := map[pb.NetMode]network.Provider{
pb.NetMode_UNSET: &bridgeProvider{NetworkController: net, Root: netRoot},
pb.NetMode_HOST: network.NewHostProvider(),
pb.NetMode_NONE: network.NewNoneProvider(),
}
// make sure net state directory is cleared from previous state
fis, err := ioutil.ReadDir(netRoot)
if err == nil {
for _, fi := range fis {
fp := filepath.Join(netRoot, fi.Name())
if err := os.RemoveAll(fp); err != nil {
logrus.WithError(err).Errorf("failed to delete old network state: %v", fp)
}
}
}
return runcexecutor.New(runcexecutor.Opt{
Root: filepath.Join(root, "executor"),
CommandCandidates: []string{"runc"},
DefaultCgroupParent: cgroupParent,
Rootless: rootless,
NoPivot: os.Getenv("DOCKER_RAMDISK") != "",
IdentityMapping: idmap,
DNS: dnsConfig,
}, networkProviders)
}
type bridgeProvider struct {
libnetwork.NetworkController
Root string
}
func (p *bridgeProvider) New() (network.Namespace, error) {
n, err := p.NetworkByName(networkName)
if err != nil {
return nil, err
}
iface := &lnInterface{ready: make(chan struct{}), provider: p}
iface.Once.Do(func() {
go iface.init(p.NetworkController, n)
})
return iface, nil
}
type lnInterface struct {
ep libnetwork.Endpoint
sbx libnetwork.Sandbox
sync.Once
err error
ready chan struct{}
provider *bridgeProvider
}
func (iface *lnInterface) init(c libnetwork.NetworkController, n libnetwork.Network) {
defer close(iface.ready)
id := identity.NewID()
ep, err := n.CreateEndpoint(id, libnetwork.CreateOptionDisableResolution())
if err != nil {
iface.err = err
return
}
sbx, err := c.NewSandbox(id, libnetwork.OptionUseExternalKey(), libnetwork.OptionHostsPath(filepath.Join(iface.provider.Root, id, "hosts")),
libnetwork.OptionResolvConfPath(filepath.Join(iface.provider.Root, id, "resolv.conf")))
if err != nil {
iface.err = err
return
}
if err := ep.Join(sbx); err != nil {
iface.err = err
return
}
iface.sbx = sbx
iface.ep = ep
}
func (iface *lnInterface) Set(s *specs.Spec) error {
<-iface.ready
if iface.err != nil {
logrus.WithError(iface.err).Error("failed to set networking spec")
return iface.err
}
shortNetCtlrID := stringid.TruncateID(iface.provider.NetworkController.ID())
// attach netns to bridge within the container namespace, using reexec in a prestart hook
s.Hooks = &specs.Hooks{
Prestart: []specs.Hook{{
Path: filepath.Join("/proc", strconv.Itoa(os.Getpid()), "exe"),
Args: []string{"libnetwork-setkey", "-exec-root=" + iface.provider.Config().Daemon.ExecRoot, iface.sbx.ContainerID(), shortNetCtlrID},
}},
}
return nil
}
func (iface *lnInterface) Close() error {
<-iface.ready
if iface.sbx != nil {
go func() {
if err := iface.sbx.Delete(); err != nil {
logrus.WithError(err).Errorf("failed to delete builder network sandbox")
}
if err := os.RemoveAll(filepath.Join(iface.provider.Root, iface.sbx.ContainerID())); err != nil {
logrus.WithError(err).Errorf("failed to delete builder sandbox directory")
}
}()
}
return iface.err
}
func getDNSConfig(cfg config.DNSConfig) *oci.DNSConfig {
if cfg.DNS != nil || cfg.DNSSearch != nil || cfg.DNSOptions != nil {
return &oci.DNSConfig{
Nameservers: cfg.DNS,
SearchDomains: cfg.DNSSearch,
Options: cfg.DNSOptions,
}
}
return nil
}
| tonistiigi | e5275087b2fac376cc1554f91801bd27fab1f225 | cd049777a21bc17bcedd5eec95ace65bbba833cf | Perhaps log the actual error here? I think we can actually omit the `fp` in that case (the error likely contains the path that failed?)
```suggestion
if err := os.RemoveAll(filepath.Join(netRoot, fi.Name())); err != nil {
logrus.WithError(err).Error("failed to delete old network state")
``` | thaJeztah | 5,094 |
moby/moby | 41,863 | builder: ensure libnetwork state files do not leak | Apparently calling `sandbox.Delete` is not enough to remove all the libnetwork state files, eg. the hosts and resolv.conf file. So to avoid leaks clean up the sandbox state directory manually.
Looking at what happens on regular containers, it seems that netns is cleaned up by finalized and not directly by code. This could be investigated more in the future as could leak on restarts etc. The hosts/resolv.conf is stored in container state directory and cleaned up with container afaics.
Signed-off-by: Tonis Tiigi <[email protected]>
| null | 2021-01-07 06:52:36+00:00 | 2021-01-08 19:03:00+00:00 | builder/builder-next/executor_unix.go | // +build !windows
package buildkit
import (
"os"
"path/filepath"
"strconv"
"sync"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/libnetwork"
"github.com/moby/buildkit/executor"
"github.com/moby/buildkit/executor/oci"
"github.com/moby/buildkit/executor/runcexecutor"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/network"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
const networkName = "bridge"
func newExecutor(root, cgroupParent string, net libnetwork.NetworkController, dnsConfig *oci.DNSConfig, rootless bool, idmap *idtools.IdentityMapping) (executor.Executor, error) {
networkProviders := map[pb.NetMode]network.Provider{
pb.NetMode_UNSET: &bridgeProvider{NetworkController: net, Root: filepath.Join(root, "net")},
pb.NetMode_HOST: network.NewHostProvider(),
pb.NetMode_NONE: network.NewNoneProvider(),
}
return runcexecutor.New(runcexecutor.Opt{
Root: filepath.Join(root, "executor"),
CommandCandidates: []string{"runc"},
DefaultCgroupParent: cgroupParent,
Rootless: rootless,
NoPivot: os.Getenv("DOCKER_RAMDISK") != "",
IdentityMapping: idmap,
DNS: dnsConfig,
}, networkProviders)
}
type bridgeProvider struct {
libnetwork.NetworkController
Root string
}
func (p *bridgeProvider) New() (network.Namespace, error) {
n, err := p.NetworkByName(networkName)
if err != nil {
return nil, err
}
iface := &lnInterface{ready: make(chan struct{}), provider: p}
iface.Once.Do(func() {
go iface.init(p.NetworkController, n)
})
return iface, nil
}
type lnInterface struct {
ep libnetwork.Endpoint
sbx libnetwork.Sandbox
sync.Once
err error
ready chan struct{}
provider *bridgeProvider
}
func (iface *lnInterface) init(c libnetwork.NetworkController, n libnetwork.Network) {
defer close(iface.ready)
id := identity.NewID()
ep, err := n.CreateEndpoint(id, libnetwork.CreateOptionDisableResolution())
if err != nil {
iface.err = err
return
}
sbx, err := c.NewSandbox(id, libnetwork.OptionUseExternalKey(), libnetwork.OptionHostsPath(filepath.Join(iface.provider.Root, id, "hosts")),
libnetwork.OptionResolvConfPath(filepath.Join(iface.provider.Root, id, "resolv.conf")))
if err != nil {
iface.err = err
return
}
if err := ep.Join(sbx); err != nil {
iface.err = err
return
}
iface.sbx = sbx
iface.ep = ep
}
func (iface *lnInterface) Set(s *specs.Spec) error {
<-iface.ready
if iface.err != nil {
logrus.WithError(iface.err).Error("failed to set networking spec")
return iface.err
}
shortNetCtlrID := stringid.TruncateID(iface.provider.NetworkController.ID())
// attach netns to bridge within the container namespace, using reexec in a prestart hook
s.Hooks = &specs.Hooks{
Prestart: []specs.Hook{{
Path: filepath.Join("/proc", strconv.Itoa(os.Getpid()), "exe"),
Args: []string{"libnetwork-setkey", "-exec-root=" + iface.provider.Config().Daemon.ExecRoot, iface.sbx.ContainerID(), shortNetCtlrID},
}},
}
return nil
}
func (iface *lnInterface) Close() error {
<-iface.ready
if iface.sbx != nil {
go func() {
if err := iface.sbx.Delete(); err != nil {
logrus.Errorf("failed to delete builder network sandbox: %v", err)
}
}()
}
return iface.err
}
func getDNSConfig(cfg config.DNSConfig) *oci.DNSConfig {
if cfg.DNS != nil || cfg.DNSSearch != nil || cfg.DNSOptions != nil {
return &oci.DNSConfig{
Nameservers: cfg.DNS,
SearchDomains: cfg.DNSSearch,
Options: cfg.DNSOptions,
}
}
return nil
}
| // +build !windows
package buildkit
import (
"io/ioutil"
"os"
"path/filepath"
"strconv"
"sync"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/libnetwork"
"github.com/moby/buildkit/executor"
"github.com/moby/buildkit/executor/oci"
"github.com/moby/buildkit/executor/runcexecutor"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/network"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
const networkName = "bridge"
func newExecutor(root, cgroupParent string, net libnetwork.NetworkController, dnsConfig *oci.DNSConfig, rootless bool, idmap *idtools.IdentityMapping) (executor.Executor, error) {
netRoot := filepath.Join(root, "net")
networkProviders := map[pb.NetMode]network.Provider{
pb.NetMode_UNSET: &bridgeProvider{NetworkController: net, Root: netRoot},
pb.NetMode_HOST: network.NewHostProvider(),
pb.NetMode_NONE: network.NewNoneProvider(),
}
// make sure net state directory is cleared from previous state
fis, err := ioutil.ReadDir(netRoot)
if err == nil {
for _, fi := range fis {
fp := filepath.Join(netRoot, fi.Name())
if err := os.RemoveAll(fp); err != nil {
logrus.WithError(err).Errorf("failed to delete old network state: %v", fp)
}
}
}
return runcexecutor.New(runcexecutor.Opt{
Root: filepath.Join(root, "executor"),
CommandCandidates: []string{"runc"},
DefaultCgroupParent: cgroupParent,
Rootless: rootless,
NoPivot: os.Getenv("DOCKER_RAMDISK") != "",
IdentityMapping: idmap,
DNS: dnsConfig,
}, networkProviders)
}
type bridgeProvider struct {
libnetwork.NetworkController
Root string
}
func (p *bridgeProvider) New() (network.Namespace, error) {
n, err := p.NetworkByName(networkName)
if err != nil {
return nil, err
}
iface := &lnInterface{ready: make(chan struct{}), provider: p}
iface.Once.Do(func() {
go iface.init(p.NetworkController, n)
})
return iface, nil
}
type lnInterface struct {
ep libnetwork.Endpoint
sbx libnetwork.Sandbox
sync.Once
err error
ready chan struct{}
provider *bridgeProvider
}
func (iface *lnInterface) init(c libnetwork.NetworkController, n libnetwork.Network) {
defer close(iface.ready)
id := identity.NewID()
ep, err := n.CreateEndpoint(id, libnetwork.CreateOptionDisableResolution())
if err != nil {
iface.err = err
return
}
sbx, err := c.NewSandbox(id, libnetwork.OptionUseExternalKey(), libnetwork.OptionHostsPath(filepath.Join(iface.provider.Root, id, "hosts")),
libnetwork.OptionResolvConfPath(filepath.Join(iface.provider.Root, id, "resolv.conf")))
if err != nil {
iface.err = err
return
}
if err := ep.Join(sbx); err != nil {
iface.err = err
return
}
iface.sbx = sbx
iface.ep = ep
}
func (iface *lnInterface) Set(s *specs.Spec) error {
<-iface.ready
if iface.err != nil {
logrus.WithError(iface.err).Error("failed to set networking spec")
return iface.err
}
shortNetCtlrID := stringid.TruncateID(iface.provider.NetworkController.ID())
// attach netns to bridge within the container namespace, using reexec in a prestart hook
s.Hooks = &specs.Hooks{
Prestart: []specs.Hook{{
Path: filepath.Join("/proc", strconv.Itoa(os.Getpid()), "exe"),
Args: []string{"libnetwork-setkey", "-exec-root=" + iface.provider.Config().Daemon.ExecRoot, iface.sbx.ContainerID(), shortNetCtlrID},
}},
}
return nil
}
func (iface *lnInterface) Close() error {
<-iface.ready
if iface.sbx != nil {
go func() {
if err := iface.sbx.Delete(); err != nil {
logrus.WithError(err).Errorf("failed to delete builder network sandbox")
}
if err := os.RemoveAll(filepath.Join(iface.provider.Root, iface.sbx.ContainerID())); err != nil {
logrus.WithError(err).Errorf("failed to delete builder sandbox directory")
}
}()
}
return iface.err
}
func getDNSConfig(cfg config.DNSConfig) *oci.DNSConfig {
if cfg.DNS != nil || cfg.DNSSearch != nil || cfg.DNSOptions != nil {
return &oci.DNSConfig{
Nameservers: cfg.DNS,
SearchDomains: cfg.DNSSearch,
Options: cfg.DNSOptions,
}
}
return nil
}
| tonistiigi | e5275087b2fac376cc1554f91801bd27fab1f225 | cd049777a21bc17bcedd5eec95ace65bbba833cf | I don't want this line to use a different style than the rest of the file/pkg. | tonistiigi | 5,095 |
gohugoio/hugo | 11,706 | resources/resource: Fix GroupByParamDate with raw TOML dates | Closes #11563
| null | 2023-11-13 23:09:55+00:00 | 2023-11-22 11:09:48+00:00 | resources/resource/resource_helpers.go | // Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package resource
import (
"strings"
"time"
"github.com/gohugoio/hugo/helpers"
"github.com/spf13/cast"
)
// GetParam will return the param with the given key from the Resource,
// nil if not found.
func GetParam(r Resource, key string) any {
return getParam(r, key, false)
}
// GetParamToLower is the same as GetParam but it will lower case any string
// result, including string slices.
func GetParamToLower(r Resource, key string) any {
return getParam(r, key, true)
}
func getParam(r Resource, key string, stringToLower bool) any {
v := r.Params()[strings.ToLower(key)]
if v == nil {
return nil
}
switch val := v.(type) {
case bool:
return val
case string:
if stringToLower {
return strings.ToLower(val)
}
return val
case int64, int32, int16, int8, int:
return cast.ToInt(v)
case float64, float32:
return cast.ToFloat64(v)
case time.Time:
return val
case []string:
if stringToLower {
return helpers.SliceToLower(val)
}
return v
case map[string]any:
return v
case map[any]any:
return v
}
return nil
}
| // Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package resource
import (
"strings"
"time"
"github.com/gohugoio/hugo/helpers"
"github.com/pelletier/go-toml/v2"
"github.com/spf13/cast"
)
// GetParam will return the param with the given key from the Resource,
// nil if not found.
func GetParam(r Resource, key string) any {
return getParam(r, key, false)
}
// GetParamToLower is the same as GetParam but it will lower case any string
// result, including string slices.
func GetParamToLower(r Resource, key string) any {
return getParam(r, key, true)
}
func getParam(r Resource, key string, stringToLower bool) any {
v := r.Params()[strings.ToLower(key)]
if v == nil {
return nil
}
switch val := v.(type) {
case bool:
return val
case string:
if stringToLower {
return strings.ToLower(val)
}
return val
case int64, int32, int16, int8, int:
return cast.ToInt(v)
case float64, float32:
return cast.ToFloat64(v)
case time.Time:
return val
case toml.LocalDate:
return val.AsTime(time.UTC)
case toml.LocalDateTime:
return val.AsTime(time.UTC)
case []string:
if stringToLower {
return helpers.SliceToLower(val)
}
return v
case map[string]any:
return v
case map[any]any:
return v
}
return nil
}
| jmooring | 27620daa20bfd951971f98c8177488fc46d7637c | dd6cd6268d2f73c5505077ff278c3e964d3a2e3b | Using reflect here isn't needed. You can just do `val.AsTime(time.UTC)`. | bep | 0 |
gohugoio/hugo | 11,706 | resources/resource: Fix GroupByParamDate with raw TOML dates | Closes #11563
| null | 2023-11-13 23:09:55+00:00 | 2023-11-22 11:09:48+00:00 | resources/resource/resource_helpers.go | // Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package resource
import (
"strings"
"time"
"github.com/gohugoio/hugo/helpers"
"github.com/spf13/cast"
)
// GetParam will return the param with the given key from the Resource,
// nil if not found.
func GetParam(r Resource, key string) any {
return getParam(r, key, false)
}
// GetParamToLower is the same as GetParam but it will lower case any string
// result, including string slices.
func GetParamToLower(r Resource, key string) any {
return getParam(r, key, true)
}
func getParam(r Resource, key string, stringToLower bool) any {
v := r.Params()[strings.ToLower(key)]
if v == nil {
return nil
}
switch val := v.(type) {
case bool:
return val
case string:
if stringToLower {
return strings.ToLower(val)
}
return val
case int64, int32, int16, int8, int:
return cast.ToInt(v)
case float64, float32:
return cast.ToFloat64(v)
case time.Time:
return val
case []string:
if stringToLower {
return helpers.SliceToLower(val)
}
return v
case map[string]any:
return v
case map[any]any:
return v
}
return nil
}
| // Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package resource
import (
"strings"
"time"
"github.com/gohugoio/hugo/helpers"
"github.com/pelletier/go-toml/v2"
"github.com/spf13/cast"
)
// GetParam will return the param with the given key from the Resource,
// nil if not found.
func GetParam(r Resource, key string) any {
return getParam(r, key, false)
}
// GetParamToLower is the same as GetParam but it will lower case any string
// result, including string slices.
func GetParamToLower(r Resource, key string) any {
return getParam(r, key, true)
}
func getParam(r Resource, key string, stringToLower bool) any {
v := r.Params()[strings.ToLower(key)]
if v == nil {
return nil
}
switch val := v.(type) {
case bool:
return val
case string:
if stringToLower {
return strings.ToLower(val)
}
return val
case int64, int32, int16, int8, int:
return cast.ToInt(v)
case float64, float32:
return cast.ToFloat64(v)
case time.Time:
return val
case toml.LocalDate:
return val.AsTime(time.UTC)
case toml.LocalDateTime:
return val.AsTime(time.UTC)
case []string:
if stringToLower {
return helpers.SliceToLower(val)
}
return v
case map[string]any:
return v
case map[any]any:
return v
}
return nil
}
| jmooring | 27620daa20bfd951971f98c8177488fc46d7637c | dd6cd6268d2f73c5505077ff278c3e964d3a2e3b | I couldn't quite figure out how to do what you describe, but hopefully using `htime.ToTimeInDefaultLocationE(val, time.UTC)` is sufficient. | jmooring | 1 |
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