Example #1
0
File: kill.go Project: Mic92/docker
// killWithSignal sends the container the given signal. This wrapper for the
// host specific kill command prepares the container before attempting
// to send the signal. An error is returned if the container is paused
// or not running, or if there is a problem returned from the
// underlying kill command.
func (daemon *Daemon) killWithSignal(container *container.Container, sig int) error {
	logrus.Debugf("Sending kill signal %d to container %s", sig, container.ID)
	container.Lock()
	defer container.Unlock()

	// We could unpause the container for them rather than returning this error
	if container.Paused {
		return fmt.Errorf("Container %s is paused. Unpause the container before stopping", container.ID)
	}

	if !container.Running {
		return errNotRunning{container.ID}
	}

	if container.Config.StopSignal != "" {
		containerStopSignal, err := signal.ParseSignal(container.Config.StopSignal)
		if err != nil {
			return err
		}
		if containerStopSignal == syscall.Signal(sig) {
			container.ExitOnNext()
		}
	} else {
		container.ExitOnNext()
	}

	if !daemon.IsShuttingDown() {
		container.HasBeenManuallyStopped = true
	}

	// if the container is currently restarting we do not need to send the signal
	// to the process. Telling the monitor that it should exit on its next event
	// loop is enough
	if container.Restarting {
		return nil
	}

	if err := daemon.kill(container, sig); err != nil {
		err = fmt.Errorf("Cannot kill container %s: %s", container.ID, err)
		// if container or process not exists, ignore the error
		if strings.Contains(err.Error(), "container not found") ||
			strings.Contains(err.Error(), "no such process") {
			logrus.Warnf("container kill failed because of 'container not found' or 'no such process': %s", err.Error())
		} else {
			return err
		}
	}

	attributes := map[string]string{
		"signal": fmt.Sprintf("%d", sig),
	}
	daemon.LogContainerEventWithAttributes(container, "kill", attributes)
	return nil
}
Example #2
0
// killWithSignal sends the container the given signal. This wrapper for the
// host specific kill command prepares the container before attempting
// to send the signal. An error is returned if the container is paused
// or not running, or if there is a problem returned from the
// underlying kill command.
func (daemon *Daemon) killWithSignal(container *container.Container, sig int) error {
	logrus.Debugf("Sending %d to %s", sig, container.ID)
	container.Lock()
	defer container.Unlock()

	// We could unpause the container for them rather than returning this error
	if container.Paused {
		return derr.ErrorCodeUnpauseContainer.WithArgs(container.ID)
	}

	if !container.Running {
		return derr.ErrorCodeNotRunning.WithArgs(container.ID)
	}

	container.ExitOnNext()

	// if the container is currently restarting we do not need to send the signal
	// to the process.  Telling the monitor that it should exit on it's next event
	// loop is enough
	if container.Restarting {
		return nil
	}

	if err := daemon.kill(container, sig); err != nil {
		return err
	}

	attributes := map[string]string{
		"signal": fmt.Sprintf("%d", sig),
	}
	daemon.LogContainerEventWithAttributes(container, "kill", attributes)
	return nil
}
Example #3
0
// killWithSignal sends the container the given signal. This wrapper for the
// host specific kill command prepares the container before attempting
// to send the signal. An error is returned if the container is paused
// or not running, or if there is a problem returned from the
// underlying kill command.
func (daemon *Daemon) killWithSignal(container *container.Container, sig int) error {
	logrus.Debugf("Sending %d to %s", sig, container.ID)
	container.Lock()
	defer container.Unlock()

	// We could unpause the container for them rather than returning this error
	if container.Paused {
		return fmt.Errorf("Container %s is paused. Unpause the container before stopping", container.ID)
	}

	if !container.Running {
		return errNotRunning{container.ID}
	}

	container.ExitOnNext()

	if !daemon.IsShuttingDown() {
		container.HasBeenManuallyStopped = true
	}

	// if the container is currently restarting we do not need to send the signal
	// to the process.  Telling the monitor that it should exit on it's next event
	// loop is enough
	if container.Restarting {
		return nil
	}

	if err := daemon.kill(container, sig); err != nil {
		return fmt.Errorf("Cannot kill container %s: %s", container.ID, err)
	}

	attributes := map[string]string{
		"signal": fmt.Sprintf("%d", sig),
	}
	daemon.LogContainerEventWithAttributes(container, "kill", attributes)
	return nil
}