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moby--moby/daemon/pause.go
Daniel Nephin 4f0d95fa6e Add canonical import comment
Signed-off-by: Daniel Nephin <dnephin@docker.com>
2018-02-05 16:51:57 -05:00

55 lines
1.4 KiB
Go

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
}