github.com/rawahars/moby@v24.0.4+incompatible/daemon/pause.go (about) 1 package daemon // import "github.com/docker/docker/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 ctr, err := daemon.GetContainer(name) 14 if err != nil { 15 return err 16 } 17 return daemon.containerPause(ctr) 18 } 19 20 // containerPause pauses the container execution without stopping the process. 21 // The execution can be resumed by calling containerUnpause. 22 func (daemon *Daemon) containerPause(container *container.Container) error { 23 container.Lock() 24 defer container.Unlock() 25 26 // We cannot Pause the container which is not running 27 tsk, err := container.GetRunningTask() 28 if err != nil { 29 return err 30 } 31 32 // We cannot Pause the container which is already paused 33 if container.Paused { 34 return errNotPaused(container.ID) 35 } 36 37 // We cannot Pause the container which is restarting 38 if container.Restarting { 39 return errContainerIsRestarting(container.ID) 40 } 41 42 if err := tsk.Pause(context.Background()); err != nil { 43 return fmt.Errorf("cannot pause container %s: %s", container.ID, err) 44 } 45 46 container.Paused = true 47 daemon.setStateCounter(container) 48 daemon.updateHealthMonitor(container) 49 daemon.LogContainerEvent(container, "pause") 50 51 if err := container.CheckpointTo(daemon.containersReplica); err != nil { 52 logrus.WithError(err).Warn("could not save container to disk") 53 } 54 55 return nil 56 }