| package daemon |
| |
| import ( |
| "fmt" |
| |
| "github.com/Sirupsen/logrus" |
| "github.com/docker/docker/container" |
| ) |
| |
| // 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 := container.ToDiskLocking(); 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 |
| } |