github.com/sams1990/dockerrepo@v17.12.1-ce-rc2+incompatible/daemon/pause.go (about) 1 package daemon 2 3 import ( 4 "context" 5 "fmt" 6 7 "github.com/docker/docker/container" 8 "github.com/sirupsen/logrus" 9 ) 10 11 // ContainerPause pauses a container 12 func (daemon *Daemon) ContainerPause(name string) error { 13 container, err := daemon.GetContainer(name) 14 if err != nil { 15 return err 16 } 17 18 if err := daemon.containerPause(container); err != nil { 19 return err 20 } 21 22 return nil 23 } 24 25 // containerPause pauses the container execution without stopping the process. 26 // The execution can be resumed by calling containerUnpause. 27 func (daemon *Daemon) containerPause(container *container.Container) error { 28 container.Lock() 29 defer container.Unlock() 30 31 // We cannot Pause the container which is not running 32 if !container.Running { 33 return errNotRunning(container.ID) 34 } 35 36 // We cannot Pause the container which is already paused 37 if container.Paused { 38 return errNotPaused(container.ID) 39 } 40 41 // We cannot Pause the container which is restarting 42 if container.Restarting { 43 return errContainerIsRestarting(container.ID) 44 } 45 46 if err := daemon.containerd.Pause(context.Background(), container.ID); err != nil { 47 return fmt.Errorf("Cannot pause container %s: %s", container.ID, err) 48 } 49 50 container.Paused = true 51 daemon.setStateCounter(container) 52 daemon.updateHealthMonitor(container) 53 daemon.LogContainerEvent(container, "pause") 54 55 if err := container.CheckpointTo(daemon.containersReplica); err != nil { 56 logrus.WithError(err).Warn("could not save container to disk") 57 } 58 59 return nil 60 }