Golang types.SortedContainerStatuses函数代码示例

// isStatusEqual returns true if the given pod statuses are equal, false otherwise.
// This method sorts container statuses so order does not affect equality.
func isStatusEqual(oldStatus, status *api.PodStatus) bool {
	sort.Sort(kubetypes.SortedContainerStatuses(status.ContainerStatuses))
	sort.Sort(kubetypes.SortedContainerStatuses(oldStatus.ContainerStatuses))

	// TODO: More sophisticated equality checking.
	return reflect.DeepEqual(status, oldStatus)
}

// We add this function, because apiserver only supports *RFC3339* now, which means that the timestamp returned by
// apiserver has no nanosecond infromation. However, the timestamp returned by unversioned.Now() contains nanosecond,
// so when we do comparison between status from apiserver and cached status, isStatusEqual() will always return false.
// There is related issue #15262 and PR #15263 about this.
// In fact, the best way to solve this is to do it on api side. However for now, we normalize the status locally in
// kubelet temporarily.
// TODO(random-liu): Remove timestamp related logic after apiserver supports nanosecond or makes it consistent.
func normalizeStatus(status *api.PodStatus) *api.PodStatus {
	normalizeTimeStamp := func(t *unversioned.Time) {
		*t = t.Rfc3339Copy()
	}
	normalizeContainerState := func(c *api.ContainerState) {
		if c.Running != nil {
			normalizeTimeStamp(&c.Running.StartedAt)
		}
		if c.Terminated != nil {
			normalizeTimeStamp(&c.Terminated.StartedAt)
			normalizeTimeStamp(&c.Terminated.FinishedAt)
		}
	}

	if status.StartTime != nil {
		normalizeTimeStamp(status.StartTime)
	}
	for i := range status.Conditions {
		condition := &status.Conditions[i]
		normalizeTimeStamp(&condition.LastProbeTime)
		normalizeTimeStamp(&condition.LastTransitionTime)
	}
	for i := range status.ContainerStatuses {
		cstatus := &status.ContainerStatuses[i]
		normalizeContainerState(&cstatus.State)
		normalizeContainerState(&cstatus.LastTerminationState)
	}
	// Sort the container statuses, so that the order won't affect the result of comparison
	sort.Sort(kubetypes.SortedContainerStatuses(status.ContainerStatuses))
	return status
}

// TODO(yifan): Delete this function when the logic is moved to kubelet.
func (r *runtime) ConvertPodStatusToAPIPodStatus(pod *api.Pod, status *kubecontainer.PodStatus) (*api.PodStatus, error) {
	apiPodStatus := &api.PodStatus{
		PodIP:             status.IP,
		ContainerStatuses: make([]api.ContainerStatus, 0, 1),
	}

	containerStatuses := make(map[string]*api.ContainerStatus)
	for _, c := range status.ContainerStatuses {
		var st api.ContainerState
		switch c.State {
		case kubecontainer.ContainerStateRunning:
			st.Running = &api.ContainerStateRunning{
				StartedAt: unversioned.NewTime(c.StartedAt),
			}
		case kubecontainer.ContainerStateExited:
			st.Terminated = &api.ContainerStateTerminated{
				ExitCode:    c.ExitCode,
				StartedAt:   unversioned.NewTime(c.StartedAt),
				Reason:      c.Reason,
				Message:     c.Message,
				FinishedAt:  unversioned.NewTime(c.FinishedAt),
				ContainerID: c.ID.String(),
			}
		default:
			// Unknown state.
			st.Waiting = &api.ContainerStateWaiting{}
		}

		status, ok := containerStatuses[c.Name]
		if !ok {
			containerStatuses[c.Name] = &api.ContainerStatus{
				Name:         c.Name,
				Image:        c.Image,
				ImageID:      c.ImageID,
				ContainerID:  c.ID.String(),
				RestartCount: c.RestartCount,
				State:        st,
			}
			continue
		}

		// Found multiple container statuses, fill that as last termination state.
		if status.LastTerminationState.Waiting == nil &&
			status.LastTerminationState.Running == nil &&
			status.LastTerminationState.Terminated == nil {
			status.LastTerminationState = st
		}
	}

	for _, c := range pod.Spec.Containers {
		cs, ok := containerStatuses[c.Name]
		if !ok {
			cs = &api.ContainerStatus{
				Name:  c.Name,
				Image: c.Image,
				// TODO(yifan): Add reason and message.
				State: api.ContainerState{Waiting: &api.ContainerStateWaiting{}},
			}
		}
		apiPodStatus.ContainerStatuses = append(apiPodStatus.ContainerStatuses, *cs)
	}

	sort.Sort(kubetypes.SortedContainerStatuses(apiPodStatus.ContainerStatuses))

	return apiPodStatus, nil
}

//.........这里部分代码省略.........
	// Fetch old containers statuses from old pod status.
	oldStatuses := make(map[string]api.ContainerStatus, len(containers))
	for _, status := range previousStatus {
		oldStatuses[status.Name] = status
	}

	// Set all container statuses to default waiting state
	statuses := make(map[string]*api.ContainerStatus, len(containers))
	defaultWaitingState := api.ContainerState{Waiting: &api.ContainerStateWaiting{Reason: "ContainerCreating"}}
	if hasInitContainers {
		defaultWaitingState = api.ContainerState{Waiting: &api.ContainerStateWaiting{Reason: "PodInitializing"}}
	}

	for _, container := range containers {
		status := &api.ContainerStatus{
			Name:  container.Name,
			Image: container.Image,
			State: defaultWaitingState,
		}
		// Apply some values from the old statuses as the default values.
		if oldStatus, found := oldStatuses[container.Name]; found {
			status.RestartCount = oldStatus.RestartCount
			status.LastTerminationState = oldStatus.LastTerminationState
		}
		statuses[container.Name] = status
	}

	// Make the latest container status comes first.
	sort.Sort(sort.Reverse(kubecontainer.SortContainerStatusesByCreationTime(podStatus.ContainerStatuses)))
	// Set container statuses according to the statuses seen in pod status
	containerSeen := map[string]int{}
	for _, cStatus := range podStatus.ContainerStatuses {
		cName := cStatus.Name
		if _, ok := statuses[cName]; !ok {
			// This would also ignore the infra container.
			continue
		}
		if containerSeen[cName] >= 2 {
			continue
		}
		status := convertContainerStatus(cStatus)
		if containerSeen[cName] == 0 {
			statuses[cName] = status
		} else {
			statuses[cName].LastTerminationState = status.State
		}
		containerSeen[cName] = containerSeen[cName] + 1
	}

	// Handle the containers failed to be started, which should be in Waiting state.
	for _, container := range containers {
		if isInitContainer {
			// If the init container is terminated with exit code 0, it won't be restarted.
			// TODO(random-liu): Handle this in a cleaner way.
			s := podStatus.FindContainerStatusByName(container.Name)
			if s != nil && s.State == kubecontainer.ContainerStateExited && s.ExitCode == 0 {
				continue
			}
		}
		// If a container should be restarted in next syncpod, it is *Waiting*.
		if !kubecontainer.ShouldContainerBeRestarted(&container, pod, podStatus) {
			continue
		}
		status := statuses[container.Name]
		reason, message, ok := kl.reasonCache.Get(pod.UID, container.Name)
		if !ok {
			// In fact, we could also apply Waiting state here, but it is less informative,
			// and the container will be restarted soon, so we prefer the original state here.
			// Note that with the current implementation of ShouldContainerBeRestarted the original state here
			// could be:
			//   * Waiting: There is no associated historical container and start failure reason record.
			//   * Terminated: The container is terminated.
			continue
		}
		if status.State.Terminated != nil {
			status.LastTerminationState = status.State
		}
		status.State = api.ContainerState{
			Waiting: &api.ContainerStateWaiting{
				Reason:  reason.Error(),
				Message: message,
			},
		}
		statuses[container.Name] = status
	}

	var containerStatuses []api.ContainerStatus
	for _, status := range statuses {
		containerStatuses = append(containerStatuses, *status)
	}

	// Sort the container statuses since clients of this interface expect the list
	// of containers in a pod has a deterministic order.
	if isInitContainer {
		kubetypes.SortInitContainerStatuses(pod, containerStatuses)
	} else {
		sort.Sort(kubetypes.SortedContainerStatuses(containerStatuses))
	}
	return containerStatuses
}