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59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
package daemon
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import (
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"context"
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"fmt"
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"github.com/containerd/log"
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"github.com/moby/moby/api/types/events"
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"github.com/moby/moby/v2/daemon/container"
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"github.com/moby/moby/v2/errdefs"
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)
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// ContainerPause pauses a container
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func (daemon *Daemon) ContainerPause(name string) error {
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ctr, err := daemon.GetContainer(name)
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if err != nil {
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return err
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}
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return daemon.containerPause(ctr)
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}
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// containerPause pauses the container execution without stopping the process.
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// The execution can be resumed by calling containerUnpause.
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func (daemon *Daemon) containerPause(container *container.Container) error {
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container.Lock()
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defer container.Unlock()
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// We cannot Pause the container which is not running
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tsk, err := container.GetRunningTask()
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if err != nil {
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return err
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}
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// We cannot Pause the container which is already paused
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if container.State.Paused {
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return errdefs.Conflict(fmt.Errorf("container %s is already paused", container.ID))
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}
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// We cannot Pause the container which is restarting
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if container.State.Restarting {
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return errContainerIsRestarting(container.ID)
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}
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if err := tsk.Pause(context.Background()); err != nil {
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return fmt.Errorf("cannot pause container %s: %s", container.ID, err)
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}
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container.State.Paused = true
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daemon.setStateCounter(container)
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daemon.updateHealthMonitor(container)
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daemon.LogContainerEvent(container, events.ActionPause)
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if err := container.CheckpointTo(context.WithoutCancel(context.TODO()), daemon.containersReplica); err != nil {
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log.G(context.TODO()).WithError(err).Warn("could not save container to disk")
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}
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return nil
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}
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