func (engine *DockerTaskEngine) pullContainer(task *api.Task, container *api.Container) DockerContainerMetadata {
log.Info("Pulling container", "task", task, "container", container)
seelog.Debugf("Attempting to obtain ImagePullDeleteLock to pull image - %s", container.Image)
ImagePullDeleteLock.Lock()
seelog.Debugf("Obtained ImagePullDeleteLock to pull image - %s", container.Image)
defer seelog.Debugf("Released ImagePullDeleteLock after pulling image - %s", container.Image)
defer ImagePullDeleteLock.Unlock()
// If a task is blocked here for some time, and before it starts pulling image,
// the task's desired status is set to stopped, then don't pull the image
if task.GetDesiredStatus() == api.TaskStopped {
seelog.Infof("Task desired status is stopped, skip pull container: %v, task %v", container, task)
container.SetDesiredStatus(api.ContainerStopped)
return DockerContainerMetadata{Error: TaskStoppedBeforePullBeginError{task.Arn}}
}
metadata := engine.client.PullImage(container.Image, container.RegistryAuthentication)
err := engine.imageManager.AddContainerReferenceToImageState(container)
if err != nil {
seelog.Errorf("Error adding container reference to image state: %v", err)
}
imageState := engine.imageManager.GetImageStateFromImageName(container.Image)
engine.state.AddImageState(imageState)
engine.saver.Save()
return metadata
}
