Golang labels.Set函數代碼示例

// ValidateDaemonSetSpec tests if required fields in the DaemonSetSpec are set.
func ValidateDaemonSetSpec(spec *extensions.DaemonSetSpec) errs.ValidationErrorList {
	allErrs := errs.ValidationErrorList{}

	selector := labels.Set(spec.Selector).AsSelector()
	if selector.Empty() {
		allErrs = append(allErrs, errs.NewFieldRequired("selector"))
	}

	if spec.Template == nil {
		allErrs = append(allErrs, errs.NewFieldRequired("template"))
	} else {
		labels := labels.Set(spec.Template.Labels)
		if !selector.Matches(labels) {
			allErrs = append(allErrs, errs.NewFieldInvalid("template.metadata.labels", spec.Template.Labels, "selector does not match template"))
		}
		allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(spec.Template).Prefix("template")...)
		// Daemons typically run on more than one node, so mark Read-Write persistent disks as invalid.
		allErrs = append(allErrs, apivalidation.ValidateReadOnlyPersistentDisks(spec.Template.Spec.Volumes).Prefix("template.spec.volumes")...)
		// RestartPolicy has already been first-order validated as per ValidatePodTemplateSpec().
		if spec.Template.Spec.RestartPolicy != api.RestartPolicyAlways {
			allErrs = append(allErrs, errs.NewFieldValueNotSupported("template.spec.restartPolicy", spec.Template.Spec.RestartPolicy, []string{string(api.RestartPolicyAlways)}))
		}
	}
	return allErrs
}

// GetPodControllers returns a list of replication controllers managing a pod. Returns an error only if no matching controllers are found.
func (s *StoreToReplicationControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
	var selector labels.Selector
	var rc api.ReplicationController

	if len(pod.Labels) == 0 {
		err = fmt.Errorf("No controllers found for pod %v because it has no labels", pod.Name)
		return
	}

	for _, m := range s.Store.List() {
		rc = *m.(*api.ReplicationController)
		if rc.Namespace != pod.Namespace {
			continue
		}
		labelSet := labels.Set(rc.Spec.Selector)
		selector = labels.Set(rc.Spec.Selector).AsSelector()

		// If an rc with a nil or empty selector creeps in, it should match nothing, not everything.
		if labelSet.AsSelector().Empty() || !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		controllers = append(controllers, rc)
	}
	if len(controllers) == 0 {
		err = fmt.Errorf("Could not find daemon set for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}

// GetPodDaemonSets returns a list of daemon sets managing a pod.
// Returns an error if and only if no matching daemon sets are found.
func (s *StoreToDaemonSetLister) GetPodDaemonSets(pod *api.Pod) (daemonSets []extensions.DaemonSet, err error) {
	var selector labels.Selector
	var daemonSet extensions.DaemonSet

	if len(pod.Labels) == 0 {
		err = fmt.Errorf("No daemon sets found for pod %v because it has no labels", pod.Name)
		return
	}

	for _, m := range s.Store.List() {
		daemonSet = *m.(*extensions.DaemonSet)
		if daemonSet.Namespace != pod.Namespace {
			continue
		}
		selector = labels.Set(daemonSet.Spec.Selector).AsSelector()

		// If a daemonSet with a nil or empty selector creeps in, it should match nothing, not everything.
		if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		daemonSets = append(daemonSets, daemonSet)
	}
	if len(daemonSets) == 0 {
		err = fmt.Errorf("Could not find daemon set for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}

// TODO: Move this back to scheduler as a helper function that takes a Store,
// rather than a method of StoreToServiceLister.
func (s *StoreToServiceLister) GetPodServices(pod *api.Pod) (services []api.Service, err error) {
	var selector labels.Selector
	var service api.Service

	for _, m := range s.Store.List() {
		service = *m.(*api.Service)
		// consider only services that are in the same namespace as the pod
		if service.Namespace != pod.Namespace {
			continue
		}
		if service.Spec.Selector == nil {
			// services with nil selectors match nothing, not everything.
			continue
		}
		selector = labels.Set(service.Spec.Selector).AsSelector()
		if selector.Matches(labels.Set(pod.Labels)) {
			services = append(services, service)
		}
	}
	if len(services) == 0 {
		err = fmt.Errorf("Could not find service for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}

	return
}

func MappingTypeForPod(pod *api.Pod) HostPortMappingType {
	filter := map[string]string{
		PortMappingLabelKey: string(HostPortMappingFixed),
	}
	selector := labels.Set(filter).AsSelector()
	if selector.Matches(labels.Set(pod.Labels)) {
		return HostPortMappingFixed
	}
	return HostPortMappingWildcard
}

// getOverlappingControllers finds rcs that this controller overlaps, as well as rcs overlapping this controller.
func getOverlappingControllers(c client.ReplicationControllerInterface, rc *api.ReplicationController) ([]api.ReplicationController, error) {
	rcs, err := c.List(labels.Everything(), fields.Everything())
	if err != nil {
		return nil, fmt.Errorf("error getting replication controllers: %v", err)
	}
	var matchingRCs []api.ReplicationController
	rcLabels := labels.Set(rc.Spec.Selector)
	for _, controller := range rcs.Items {
		newRCLabels := labels.Set(controller.Spec.Selector)
		if labels.SelectorFromSet(newRCLabels).Matches(rcLabels) || labels.SelectorFromSet(rcLabels).Matches(newRCLabels) {
			matchingRCs = append(matchingRCs, controller)
		}
	}
	return matchingRCs, nil
}

func (h *HeapsterMetricsClient) GetResourceConsumptionAndRequest(resourceName api.ResourceName, namespace string, selector map[string]string) (consumption *ResourceConsumption, request *resource.Quantity, timestamp time.Time, err error) {
	podList, err := h.client.Pods(namespace).
		List(labels.SelectorFromSet(labels.Set(selector)), fields.Everything())

	if err != nil {
		return nil, nil, time.Time{}, fmt.Errorf("failed to get pod list: %v", err)
	}
	podNames := []string{}
	sum := resource.MustParse("0")
	missing := false
	for _, pod := range podList.Items {
		podNames = append(podNames, pod.Name)
		for _, container := range pod.Spec.Containers {
			containerRequest := container.Resources.Requests[resourceName]
			if containerRequest.Amount != nil {
				sum.Add(containerRequest)
			} else {
				missing = true
			}
		}
	}
	if missing || sum.Cmp(resource.MustParse("0")) == 0 {
		return nil, nil, time.Time{}, fmt.Errorf("some pods do not have request for %s", resourceName)
	}
	glog.Infof("Sum of %s requested: %v", resourceName, sum)
	avg := resource.MustParse(fmt.Sprintf("%dm", sum.MilliValue()/int64(len(podList.Items))))
	request = &avg
	consumption, timestamp, err = h.getForPods(resourceName, namespace, podNames)
	if err != nil {
		return nil, nil, time.Time{}, err
	}
	return consumption, request, timestamp, nil
}

func (t *Tester) testListMatchLabels(obj runtime.Object, assignFn AssignFunc) {
	ctx := t.TestContext()
	testLabels := map[string]string{"key": "value"}

	foo1 := copyOrDie(obj)
	t.setObjectMeta(foo1, "foo1")
	foo2 := copyOrDie(obj)
	foo2Meta := t.getObjectMetaOrFail(foo2)
	foo2Meta.Name = "foo2"
	foo2Meta.Namespace = api.NamespaceValue(ctx)
	foo2Meta.Labels = testLabels

	existing := assignFn([]runtime.Object{foo1, foo2})
	filtered := []runtime.Object{existing[1]}

	selector := labels.SelectorFromSet(labels.Set(testLabels))
	listObj, err := t.storage.(rest.Lister).List(ctx, selector, fields.Everything())
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	items, err := listToItems(listObj)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	if len(items) != len(filtered) {
		t.Errorf("unexpected number of items: %v", len(items))
	}
	if !api.Semantic.DeepEqual(filtered, items) {
		t.Errorf("expected: %#v, got: %#v", filtered, items)
	}
}

func verifyExpectedRcsExistAndGetExpectedPods(c *client.Client) ([]string, error) {
	expectedPods := []string{}
	// Iterate over the labels that identify the replication controllers that we
	// want to check. The rcLabels contains the value values for the k8s-app key
	// that identify the replication controllers that we want to check. Using a label
	// rather than an explicit name is preferred because the names will typically have
	// a version suffix e.g. heapster-monitoring-v1 and this will change after a rolling
	// update e.g. to heapster-monitoring-v2. By using a label query we can check for the
	// situaiton when a heapster-monitoring-v1 and heapster-monitoring-v2 replication controller
	// is running (which would be an error except during a rolling update).
	for _, rcLabel := range rcLabels {
		rcList, err := c.ReplicationControllers(api.NamespaceSystem).List(labels.Set{"k8s-app": rcLabel}.AsSelector())
		if err != nil {
			return nil, err
		}
		if len(rcList.Items) != 1 {
			return nil, fmt.Errorf("expected to find one replica for RC with label %s but got %d",
				rcLabel, len(rcList.Items))
		}
		for _, rc := range rcList.Items {
			podList, err := c.Pods(api.NamespaceSystem).List(labels.Set(rc.Spec.Selector).AsSelector(), fields.Everything())
			if err != nil {
				return nil, err
			}
			for _, pod := range podList.Items {
				if pod.DeletionTimestamp != nil {
					continue
				}
				expectedPods = append(expectedPods, string(pod.UID))
			}
		}
	}
	return expectedPods, nil
}

func checkDaemonPodOnNodes(f *Framework, selector map[string]string, nodeNames []string) func() (bool, error) {
	return func() (bool, error) {
		podList, err := f.Client.Pods(f.Namespace.Name).List(labels.Set(selector).AsSelector(), fields.Everything())
		if err != nil {
			return false, nil
		}
		pods := podList.Items

		nodesToPodCount := make(map[string]int)
		for _, pod := range pods {
			nodesToPodCount[pod.Spec.NodeName] += 1
		}

		// Ensure that exactly 1 pod is running on all nodes in nodeNames.
		for _, nodeName := range nodeNames {
			if nodesToPodCount[nodeName] != 1 {
				return false, nil
			}
		}

		// Ensure that sizes of the lists are the same. We've verified that every element of nodeNames is in
		// nodesToPodCount, so verifying the lengths are equal ensures that there aren't pods running on any
		// other nodes.
		return len(nodesToPodCount) == len(nodeNames), nil
	}
}

func PodMatchesNodeLabels(pod *api.Pod, node *api.Node) bool {
	if len(pod.Spec.NodeSelector) == 0 {
		return true
	}
	selector := labels.SelectorFromSet(pod.Spec.NodeSelector)
	return selector.Matches(labels.Set(node.Labels))
}

// pollForReadyPods polls oldRc and newRc each interval and returns the old
// and new ready counts for their pods. If a pod is observed as being ready,
// it's considered ready even if it later becomes notReady.
func (r *RollingUpdater) pollForReadyPods(interval, timeout time.Duration, oldRc, newRc *api.ReplicationController) (int, int, error) {
	controllers := []*api.ReplicationController{oldRc, newRc}
	oldReady := 0
	newReady := 0
	err := wait.Poll(interval, timeout, func() (done bool, err error) {
		anyReady := false
		for _, controller := range controllers {
			selector := labels.Set(controller.Spec.Selector).AsSelector()
			pods, err := r.c.Pods(controller.Namespace).List(selector, fields.Everything())
			if err != nil {
				return false, err
			}
			for _, pod := range pods.Items {
				if api.IsPodReady(&pod) {
					switch controller.Name {
					case oldRc.Name:
						oldReady++
					case newRc.Name:
						newReady++
					}
					anyReady = true
				}
			}
		}
		if anyReady {
			return true, nil
		}
		return false, nil
	})
	return oldReady, newReady, err
}

// GetPodControllers returns a list of jobs managing a pod. Returns an error only if no matching jobs are found.
func (s *StoreToJobLister) GetPodJobs(pod *api.Pod) (jobs []extensions.Job, err error) {
	var selector labels.Selector
	var job extensions.Job

	if len(pod.Labels) == 0 {
		err = fmt.Errorf("No jobs found for pod %v because it has no labels", pod.Name)
		return
	}

	for _, m := range s.Store.List() {
		job = *m.(*extensions.Job)
		if job.Namespace != pod.Namespace {
			continue
		}

		selector, _ = extensions.PodSelectorAsSelector(job.Spec.Selector)
		if !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		jobs = append(jobs, job)
	}
	if len(jobs) == 0 {
		err = fmt.Errorf("Could not find jobs for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}

// Returns the old RCs targetted by the given Deployment.
func GetOldRCs(deployment extensions.Deployment, c client.Interface) ([]*api.ReplicationController, error) {
	namespace := deployment.ObjectMeta.Namespace
	// 1. Find all pods whose labels match deployment.Spec.Selector
	podList, err := c.Pods(namespace).List(labels.SelectorFromSet(deployment.Spec.Selector), fields.Everything())
	if err != nil {
		return nil, fmt.Errorf("error listing pods: %v", err)
	}
	// 2. Find the corresponding RCs for pods in podList.
	// TODO: Right now we list all RCs and then filter. We should add an API for this.
	oldRCs := map[string]api.ReplicationController{}
	rcList, err := c.ReplicationControllers(namespace).List(labels.Everything())
	if err != nil {
		return nil, fmt.Errorf("error listing replication controllers: %v", err)
	}
	for _, pod := range podList.Items {
		podLabelsSelector := labels.Set(pod.ObjectMeta.Labels)
		for _, rc := range rcList.Items {
			rcLabelsSelector := labels.SelectorFromSet(rc.Spec.Selector)
			if rcLabelsSelector.Matches(podLabelsSelector) {
				// Filter out RC that has the same pod template spec as the deployment - that is the new RC.
				if api.Semantic.DeepEqual(rc.Spec.Template, GetNewRCTemplate(deployment)) {
					continue
				}
				oldRCs[rc.ObjectMeta.Name] = rc
			}
		}
	}
	requiredRCs := []*api.ReplicationController{}
	for _, value := range oldRCs {
		requiredRCs = append(requiredRCs, &value)
	}
	return requiredRCs, nil
}

func ValidateJobSpec(spec *extensions.JobSpec) errs.ValidationErrorList {
	allErrs := errs.ValidationErrorList{}

	if spec.Parallelism != nil {
		allErrs = append(allErrs, apivalidation.ValidatePositiveField(int64(*spec.Parallelism), "parallelism")...)
	}
	if spec.Completions != nil {
		allErrs = append(allErrs, apivalidation.ValidatePositiveField(int64(*spec.Completions), "completions")...)
	}
	if spec.Selector == nil {
		allErrs = append(allErrs, errs.NewFieldRequired("selector"))
	} else {
		allErrs = append(allErrs, ValidatePodSelector(spec.Selector).Prefix("selector")...)
	}

	if selector, err := extensions.PodSelectorAsSelector(spec.Selector); err == nil {
		labels := labels.Set(spec.Template.Labels)
		if !selector.Matches(labels) {
			allErrs = append(allErrs, errs.NewFieldInvalid("template.metadata.labels", spec.Template.Labels, "selector does not match template"))
		}
	}

	allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(&spec.Template).Prefix("template")...)
	if spec.Template.Spec.RestartPolicy != api.RestartPolicyOnFailure &&
		spec.Template.Spec.RestartPolicy != api.RestartPolicyNever {
		allErrs = append(allErrs, errs.NewFieldValueNotSupported("template.spec.restartPolicy",
			spec.Template.Spec.RestartPolicy, []string{string(api.RestartPolicyOnFailure), string(api.RestartPolicyNever)}))
	}
	return allErrs
}