package daemon import ( "time" "github.com/Sirupsen/logrus" "github.com/docker/docker/container" derr "github.com/docker/docker/errors" ) // ContainerStop looks for the given container and terminates it, // waiting the given number of seconds before forcefully killing the // container. If a negative number of seconds is given, ContainerStop // will wait for a graceful termination. An error is returned if the // container is not found, is already stopped, or if there is a // problem stopping the container. func (daemon *Daemon) ContainerStop(name string, seconds int) error { container, err := daemon.GetContainer(name) if err != nil { return err } if !container.IsRunning() { return derr.ErrorCodeStopped } if err := daemon.containerStop(container, seconds); err != nil { return derr.ErrorCodeCantStop.WithArgs(name, err) } return nil } // containerStop halts a container by sending a stop signal, waiting for the given // duration in seconds, and then calling SIGKILL and waiting for the // process to exit. If a negative duration is given, Stop will wait // for the initial signal forever. If the container is not running Stop returns // immediately. func (daemon *Daemon) containerStop(container *container.Container, seconds int) error { if !container.IsRunning() { return nil } // 1. Send a SIGTERM if err := daemon.killPossiblyDeadProcess(container, container.StopSignal()); err != nil { logrus.Infof("Failed to send SIGTERM to the process, force killing") if err := daemon.killPossiblyDeadProcess(container, 9); err != nil { return err } } // 2. Wait for the process to exit on its own if _, err := container.WaitStop(time.Duration(seconds) * time.Second); err != nil { logrus.Infof("Container %v failed to exit within %d seconds of SIGTERM - using the force", container.ID, seconds) // 3. If it doesn't, then send SIGKILL if err := daemon.Kill(container); err != nil { container.WaitStop(-1 * time.Second) logrus.Warn(err) // Don't return error because we only care that container is stopped, not what function stopped it } } daemon.LogContainerEvent(container, "stop") return nil }