// 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 fmt.Errorf("Container %s is already paused", container.ID)
}
// We cannot Pause the container which is restarting
if container.Restarting {
return errContainerIsRestarting(container.ID)
}
if err := daemon.execDriver.Pause(container.Command); err != nil {
return fmt.Errorf("Cannot pause container %s: %s", container.ID, err)
}
container.Paused = true
daemon.LogContainerEvent(container, "pause")
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 derr.ErrorCodeNotRunning.WithArgs(container.ID)
}
// We cannot Pause the container which is already paused
if container.Paused {
return derr.ErrorCodeAlreadyPaused.WithArgs(container.ID)
}
// We cannot Pause the container which is restarting
if container.Restarting {
return derr.ErrorCodeContainerRestarting.WithArgs(container.ID)
}
if err := daemon.execDriver.Pause(container.Command); err != nil {
return derr.ErrorCodeCantPause.WithArgs(container.ID, err)
}
container.Paused = true
daemon.LogContainerEvent(container, "pause")
return nil
}
// containerUnpause resumes the container execution after the container is paused.
func (daemon *Daemon) containerUnpause(container *container.Container) error {
container.Lock()
defer container.Unlock()
// We cannot unpause the container which is not running
if !container.Running {
return derr.ErrorCodeNotRunning.WithArgs(container.ID)
}
// We cannot unpause the container which is not paused
if !container.Paused {
return derr.ErrorCodeNotPaused.WithArgs(container.ID)
}
if err := daemon.execDriver.Unpause(container.Command); err != nil {
return err
}
container.Paused = false
daemon.LogContainerEvent(container, "unpause")
return nil
}