| package daemon // import "github.com/docker/docker/daemon" |
| |
| import ( |
| "context" |
| "fmt" |
| |
| "github.com/docker/docker/container" |
| "github.com/sirupsen/logrus" |
| ) |
| |
| // ContainerPause pauses a container |
| func (daemon *Daemon) ContainerPause(name string) error { |
| container, err := daemon.GetContainer(name) |
| if err != nil { |
| return err |
| } |
| return daemon.containerPause(container) |
| } |
| |
| // containerPause pauses the container execution without stopping the process. |
| // The execution can be resumed by calling containerUnpause. |
| func (daemon *Daemon) containerPause(container *container.Container) error { |
| container.Lock() |
| defer container.Unlock() |
| |
| // We cannot Pause the container which is not running |
| if !container.Running { |
| return errNotRunning(container.ID) |
| } |
| |
| // We cannot Pause the container which is already paused |
| if container.Paused { |
| return errNotPaused(container.ID) |
| } |
| |
| // We cannot Pause the container which is restarting |
| if container.Restarting { |
| return errContainerIsRestarting(container.ID) |
| } |
| |
| if err := daemon.containerd.Pause(context.Background(), container.ID); err != nil { |
| return fmt.Errorf("Cannot pause container %s: %s", container.ID, err) |
| } |
| |
| container.Paused = true |
| daemon.setStateCounter(container) |
| daemon.updateHealthMonitor(container) |
| daemon.LogContainerEvent(container, "pause") |
| |
| if err := container.CheckpointTo(daemon.containersReplica); err != nil { |
| logrus.WithError(err).Warn("could not save container to disk") |
| } |
| |
| return nil |
| } |