Exemplo n.º 1
0
// Creates a name which can be reversed to identify both full pod name and container name.
func BuildDockerName(dockerName KubeletContainerName, container *api.Container) (string, string) {
	containerName := dockerName.ContainerName + "." + strconv.FormatUint(kubecontainer.HashContainer(container), 16)
	stableName := fmt.Sprintf("%s_%s_%s_%s",
		containerNamePrefix,
		containerName,
		dockerName.PodFullName,
		dockerName.PodUID)

	return stableName, fmt.Sprintf("%s_%08x", stableName, rand.Uint32())
}
Exemplo n.º 2
0
// apiPodToruntimePod converts an api.Pod to kubelet/container.Pod.
// we save the this for later reconstruction of the kubelet/container.Pod
// such as in GetPods().
func apiPodToRuntimePod(uuid string, pod *api.Pod) *kubecontainer.Pod {
	p := &kubecontainer.Pod{
		ID:        pod.UID,
		Name:      pod.Name,
		Namespace: pod.Namespace,
	}
	for i := range pod.Spec.Containers {
		c := &pod.Spec.Containers[i]
		p.Containers = append(p.Containers, &kubecontainer.Container{
			ID:      types.UID(buildContainerID(&containerID{uuid, c.Name})),
			Name:    c.Name,
			Image:   c.Image,
			Hash:    kubecontainer.HashContainer(c),
			Created: time.Now().Unix(),
		})
	}
	return p
}
Exemplo n.º 3
0
// SyncPod syncs the running pod to match the specified desired pod.
func (r *runtime) SyncPod(pod *api.Pod, runningPod kubecontainer.Pod, podStatus api.PodStatus, pullSecrets []api.Secret, backOff *util.Backoff) error {
	podFullName := kubeletUtil.FormatPodName(pod)
	if len(runningPod.Containers) == 0 {
		glog.V(4).Infof("Pod %q is not running, will start it", podFullName)
		return r.RunPod(pod, pullSecrets)
	}

	// Add references to all containers.
	unidentifiedContainers := make(map[types.UID]*kubecontainer.Container)
	for _, c := range runningPod.Containers {
		unidentifiedContainers[c.ID] = c
	}

	restartPod := false
	for _, container := range pod.Spec.Containers {
		expectedHash := kubecontainer.HashContainer(&container)

		c := runningPod.FindContainerByName(container.Name)
		if c == nil {
			if kubecontainer.ShouldContainerBeRestarted(&container, pod, &podStatus, r.readinessManager) {
				glog.V(3).Infof("Container %+v is dead, but RestartPolicy says that we should restart it.", container)
				// TODO(yifan): Containers in one pod are fate-sharing at this moment, see:
				// https://github.com/appc/spec/issues/276.
				restartPod = true
				break
			}
			continue
		}

		// TODO: check for non-root image directives.  See ../docker/manager.go#SyncPod

		// TODO(yifan): Take care of host network change.
		containerChanged := c.Hash != 0 && c.Hash != expectedHash
		if containerChanged {
			glog.Infof("Pod %q container %q hash changed (%d vs %d), it will be killed and re-created.", podFullName, container.Name, c.Hash, expectedHash)
			restartPod = true
			break
		}

		result, err := r.prober.Probe(pod, podStatus, container, string(c.ID), c.Created)
		// TODO(vmarmol): examine this logic.
		if err == nil && result != probe.Success {
			glog.Infof("Pod %q container %q is unhealthy (probe result: %v), it will be killed and re-created.", podFullName, container.Name, result)
			restartPod = true
			break
		}

		if err != nil {
			glog.V(2).Infof("Probe container %q failed: %v", container.Name, err)
		}
		delete(unidentifiedContainers, c.ID)
	}

	// If there is any unidentified containers, restart the pod.
	if len(unidentifiedContainers) > 0 {
		restartPod = true
	}

	if restartPod {
		if err := r.KillPod(pod, runningPod); err != nil {
			return err
		}
		if err := r.RunPod(pod, pullSecrets); err != nil {
			return err
		}
	}
	return nil
}