package daemon // import "github.com/docker/docker/daemon" import ( "fmt" "github.com/docker/docker/container" "github.com/sirupsen/logrus" ) // ContainerRestart stops and starts a container. It attempts to // gracefully stop the container within the given timeout, forcefully // stopping it if the timeout is exceeded. If given a negative // timeout, ContainerRestart will wait forever until a graceful // stop. Returns an error if the container cannot be found, or if // there is an underlying error at any stage of the restart. func (daemon *Daemon) ContainerRestart(name string, seconds *int) error { container, err := daemon.GetContainer(name) if err != nil { return err } if seconds == nil { stopTimeout := container.StopTimeout() seconds = &stopTimeout } if err := daemon.containerRestart(container, *seconds); err != nil { return fmt.Errorf("Cannot restart container %s: %v", name, err) } return nil } // containerRestart attempts to gracefully stop and then start the // container. When stopping, wait for the given duration in seconds to // gracefully stop, before forcefully terminating the container. If // given a negative duration, wait forever for a graceful stop. func (daemon *Daemon) containerRestart(container *container.Container, seconds int) error { // Avoid unnecessarily unmounting and then directly mounting // the container when the container stops and then starts // again if err := daemon.Mount(container); err == nil { defer daemon.Unmount(container) } if container.IsRunning() { // set AutoRemove flag to false before stop so the container won't be // removed during restart process autoRemove := container.HostConfig.AutoRemove container.HostConfig.AutoRemove = false err := daemon.containerStop(container, seconds) // restore AutoRemove irrespective of whether the stop worked or not container.HostConfig.AutoRemove = autoRemove // containerStop will write HostConfig to disk, we shall restore AutoRemove // in disk too if toDiskErr := daemon.checkpointAndSave(container); toDiskErr != nil { logrus.Errorf("Write container to disk error: %v", toDiskErr) } if err != nil { return err } } if err := daemon.containerStart(container, "", "", true); err != nil { return err } daemon.LogContainerEvent(container, "restart") return nil }