package 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 } if err := daemon.containerPause(container); err != nil { return err } return nil } // 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 }