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package libcontainerd // import "github.com/docker/docker/libcontainerd"
import (
"context"
"github.com/containerd/containerd"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/libcontainerd/types"
)
// ReplaceContainer creates a new container, replacing any existing container
// with the same id if necessary.
func ReplaceContainer(ctx context.Context, client types.Client, id string, spec *specs.Spec, shim string, runtimeOptions interface{}, opts ...containerd.NewContainerOpts) (types.Container, error) {
newContainer := func() (types.Container, error) {
return client.NewContainer(ctx, id, spec, shim, runtimeOptions, opts...)
}
ctr, err := newContainer()
if err == nil || !errdefs.IsConflict(err) {
return ctr, err
}
log := logrus.WithContext(ctx).WithField("container", id)
log.Debug("A container already exists with the same ID. Attempting to clean up the old container.")
ctr, err = client.LoadContainer(ctx, id)
if err != nil {
if errdefs.IsNotFound(err) {
// Task failed successfully: the container no longer exists,
// despite us not doing anything. May as well try to create
// the container again. It might succeed.
return newContainer()
}
return nil, errors.Wrap(err, "could not load stale containerd container object")
}
tsk, err := ctr.Task(ctx)
if err != nil {
if errdefs.IsNotFound(err) {
goto deleteContainer
}
// There is no point in trying to delete the container if we
// cannot determine whether or not it has a task. The containerd
// client would just try to load the task itself, get the same
// error, and give up.
return nil, errors.Wrap(err, "could not load stale containerd task object")
}
if err := tsk.ForceDelete(ctx); err != nil {
if !errdefs.IsNotFound(err) {
return nil, errors.Wrap(err, "could not delete stale containerd task object")
}
// The task might have exited on its own. Proceed with
// attempting to delete the container.
}
deleteContainer:
if err := ctr.Delete(ctx); err != nil && !errdefs.IsNotFound(err) {
return nil, errors.Wrap(err, "could not delete stale containerd container object")
}
return newContainer()
}
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