edad52707c
Reuse existing structures and rely on json serialization to deep copy Container objects. Also consolidate all "save" operations on container.CheckpointTo, which now both saves a serialized json to disk, and replicates state to the ACID in-memory store. Signed-off-by: Fabio Kung <fabio.kung@gmail.com>
70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
package daemon
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import (
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"fmt"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/container"
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)
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// ContainerRestart stops and starts a container. It attempts to
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// gracefully stop the container within the given timeout, forcefully
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// stopping it if the timeout is exceeded. If given a negative
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// timeout, ContainerRestart will wait forever until a graceful
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// stop. Returns an error if the container cannot be found, or if
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// there is an underlying error at any stage of the restart.
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func (daemon *Daemon) ContainerRestart(name string, seconds *int) error {
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container, err := daemon.GetContainer(name)
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if err != nil {
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return err
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}
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if seconds == nil {
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stopTimeout := container.StopTimeout()
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seconds = &stopTimeout
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}
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if err := daemon.containerRestart(container, *seconds); err != nil {
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return fmt.Errorf("Cannot restart container %s: %v", name, err)
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}
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return nil
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}
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// containerRestart attempts to gracefully stop and then start the
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// container. When stopping, wait for the given duration in seconds to
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// gracefully stop, before forcefully terminating the container. If
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// given a negative duration, wait forever for a graceful stop.
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func (daemon *Daemon) containerRestart(container *container.Container, seconds int) error {
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// Avoid unnecessarily unmounting and then directly mounting
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// the container when the container stops and then starts
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// again
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if err := daemon.Mount(container); err == nil {
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defer daemon.Unmount(container)
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}
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if container.IsRunning() {
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// set AutoRemove flag to false before stop so the container won't be
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// removed during restart process
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autoRemove := container.HostConfig.AutoRemove
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container.HostConfig.AutoRemove = false
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err := daemon.containerStop(container, seconds)
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// restore AutoRemove irrespective of whether the stop worked or not
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container.HostConfig.AutoRemove = autoRemove
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// containerStop will write HostConfig to disk, we shall restore AutoRemove
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// in disk too
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if toDiskErr := daemon.checkpointAndSave(container); toDiskErr != nil {
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logrus.Errorf("Write container to disk error: %v", toDiskErr)
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}
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if err != nil {
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return err
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}
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}
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if err := daemon.containerStart(container, "", "", true); err != nil {
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return err
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}
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daemon.LogContainerEvent(container, "restart")
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return nil
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}
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