Golang system.IsMasterNode函数代码示例

func NewMetricsGrabber(c *client.Client, kubelets bool, scheduler bool, controllers bool, apiServer bool) (*MetricsGrabber, error) {
	registeredMaster := false
	masterName := ""
	nodeList, err := c.Nodes().List(api.ListOptions{})
	if err != nil {
		return nil, err
	}
	if len(nodeList.Items) < 1 {
		glog.Warning("Can't find any Nodes in the API server to grab metrics from")
	}
	for _, node := range nodeList.Items {
		if system.IsMasterNode(&node) {
			registeredMaster = true
			masterName = node.Name
			break
		}
	}
	if !registeredMaster {
		scheduler = false
		controllers = false
		glog.Warningf("Master node is not registered. Grabbing metrics from Scheduler and ControllerManager is disabled.")
	}

	return &MetricsGrabber{
		client:                    c,
		grabFromApiServer:         apiServer,
		grabFromControllerManager: controllers,
		grabFromKubelets:          kubelets,
		grabFromScheduler:         scheduler,
		masterName:                masterName,
		registeredMaster:          registeredMaster,
	}, nil
}

func NewResourceUsageGatherer(c clientset.Interface, options ResourceGathererOptions) (*containerResourceGatherer, error) {
	g := containerResourceGatherer{
		client:               c,
		stopCh:               make(chan struct{}),
		containerIDToNameMap: make(map[string]string),
		containerIDs:         make([]string, 0),
		options:              options,
	}

	if options.inKubemark {
		g.workerWg.Add(1)
		g.workers = append(g.workers, resourceGatherWorker{
			inKubemark: true,
			stopCh:     g.stopCh,
			wg:         &g.workerWg,
			finished:   false,
		})
	} else {
		pods, err := c.Core().Pods("kube-system").List(v1.ListOptions{})
		if err != nil {
			Logf("Error while listing Pods: %v", err)
			return nil, err
		}
		for _, pod := range pods.Items {
			for _, container := range pod.Status.ContainerStatuses {
				containerID := strings.TrimPrefix(container.ContainerID, "docker:/")
				g.containerIDToNameMap[containerID] = pod.Name + "/" + container.Name
				g.containerIDs = append(g.containerIDs, containerID)
			}
		}
		nodeList, err := c.Core().Nodes().List(v1.ListOptions{})
		if err != nil {
			Logf("Error while listing Nodes: %v", err)
			return nil, err
		}

		for _, node := range nodeList.Items {
			if !options.masterOnly || system.IsMasterNode(node.Name) {
				g.workerWg.Add(1)
				g.workers = append(g.workers, resourceGatherWorker{
					c:                    c,
					nodeName:             node.Name,
					wg:                   &g.workerWg,
					containerIDToNameMap: g.containerIDToNameMap,
					containerIDs:         g.containerIDs,
					stopCh:               g.stopCh,
					finished:             false,
					inKubemark:           false,
				})
				if options.masterOnly {
					break
				}
			}
		}
	}
	return &g, nil
}

// monitorNodeStatus verifies node status are constantly updated by kubelet, and if not,
// post "NodeReady==ConditionUnknown". It also evicts all pods if node is not ready or
// not reachable for a long period of time.
func (nc *NodeController) monitorNodeStatus() error {
	// We are listing nodes from local cache as we can tolerate some small delays
	// comparing to state from etcd and there is eventual consistency anyway.
	nodes, err := nc.nodeStore.List()
	if err != nil {
		return err
	}
	added, deleted := nc.checkForNodeAddedDeleted(&nodes)
	for i := range added {
		glog.V(1).Infof("NodeController observed a new Node: %#v", added[i].Name)
		recordNodeEvent(nc.recorder, added[i].Name, string(added[i].UID), v1.EventTypeNormal, "RegisteredNode", fmt.Sprintf("Registered Node %v in NodeController", added[i].Name))
		nc.knownNodeSet[added[i].Name] = added[i]
		// When adding new Nodes we need to check if new zone appeared, and if so add new evictor.
		zone := utilnode.GetZoneKey(added[i])
		if _, found := nc.zonePodEvictor[zone]; !found {
			nc.zonePodEvictor[zone] =
				NewRateLimitedTimedQueue(
					flowcontrol.NewTokenBucketRateLimiter(nc.evictionLimiterQPS, evictionRateLimiterBurst))
			// Init the metric for the new zone.
			glog.Infof("Initializing eviction metric for zone: %v", zone)
			EvictionsNumber.WithLabelValues(zone).Add(0)
		}
		nc.cancelPodEviction(added[i])
	}

	for i := range deleted {
		glog.V(1).Infof("NodeController observed a Node deletion: %v", deleted[i].Name)
		recordNodeEvent(nc.recorder, deleted[i].Name, string(deleted[i].UID), v1.EventTypeNormal, "RemovingNode", fmt.Sprintf("Removing Node %v from NodeController", deleted[i].Name))
		delete(nc.knownNodeSet, deleted[i].Name)
	}

	zoneToNodeConditions := map[string][]*v1.NodeCondition{}
	for i := range nodes.Items {
		var gracePeriod time.Duration
		var observedReadyCondition v1.NodeCondition
		var currentReadyCondition *v1.NodeCondition
		nodeCopy, err := api.Scheme.DeepCopy(&nodes.Items[i])
		if err != nil {
			utilruntime.HandleError(err)
			continue
		}
		node := nodeCopy.(*v1.Node)
		for rep := 0; rep < nodeStatusUpdateRetry; rep++ {
			gracePeriod, observedReadyCondition, currentReadyCondition, err = nc.tryUpdateNodeStatus(node)
			if err == nil {
				break
			}
			name := node.Name
			node, err = nc.kubeClient.Core().Nodes().Get(name, metav1.GetOptions{})
			if err != nil {
				glog.Errorf("Failed while getting a Node to retry updating NodeStatus. Probably Node %s was deleted.", name)
				break
			}
			time.Sleep(retrySleepTime)
		}
		if err != nil {
			glog.Errorf("Update status  of Node %v from NodeController exceeds retry count."+
				"Skipping - no pods will be evicted.", node.Name)
			continue
		}
		// We do not treat a master node as a part of the cluster for network disruption checking.
		if !system.IsMasterNode(node.Name) {
			zoneToNodeConditions[utilnode.GetZoneKey(node)] = append(zoneToNodeConditions[utilnode.GetZoneKey(node)], currentReadyCondition)
		}

		decisionTimestamp := nc.now()
		if currentReadyCondition != nil {
			// Check eviction timeout against decisionTimestamp
			if observedReadyCondition.Status == v1.ConditionFalse &&
				decisionTimestamp.After(nc.nodeStatusMap[node.Name].readyTransitionTimestamp.Add(nc.podEvictionTimeout)) {
				if nc.evictPods(node) {
					glog.V(2).Infof("Evicting pods on node %s: %v is later than %v + %v", node.Name, decisionTimestamp, nc.nodeStatusMap[node.Name].readyTransitionTimestamp, nc.podEvictionTimeout)
				}
			}
			if observedReadyCondition.Status == v1.ConditionUnknown &&
				decisionTimestamp.After(nc.nodeStatusMap[node.Name].probeTimestamp.Add(nc.podEvictionTimeout)) {
				if nc.evictPods(node) {
					glog.V(2).Infof("Evicting pods on node %s: %v is later than %v + %v", node.Name, decisionTimestamp, nc.nodeStatusMap[node.Name].readyTransitionTimestamp, nc.podEvictionTimeout-gracePeriod)
				}
			}
			if observedReadyCondition.Status == v1.ConditionTrue {
				if nc.cancelPodEviction(node) {
					glog.V(2).Infof("Node %s is ready again, cancelled pod eviction", node.Name)
				}
			}

			// Report node event.
			if currentReadyCondition.Status != v1.ConditionTrue && observedReadyCondition.Status == v1.ConditionTrue {
				recordNodeStatusChange(nc.recorder, node, "NodeNotReady")
				if err = markAllPodsNotReady(nc.kubeClient, node); err != nil {
					utilruntime.HandleError(fmt.Errorf("Unable to mark all pods NotReady on node %v: %v", node.Name, err))
				}
			}

			// Check with the cloud provider to see if the node still exists. If it
			// doesn't, delete the node immediately.
			if currentReadyCondition.Status != v1.ConditionTrue && nc.cloud != nil {
//.........这里部分代码省略.........

			By("Cleaning up the replication controller")
			err := framework.DeleteRC(c, ns, RCName)
			framework.ExpectNoError(err)
		}
	})

	f := framework.NewDefaultFramework("sched-pred")

	BeforeEach(func() {
		c = f.Client
		ns = f.Namespace.Name
		nodeList = &api.NodeList{}
		nodes, err := c.Nodes().List(api.ListOptions{})
		masterNodes = sets.NewString()
		for _, node := range nodes.Items {
			if system.IsMasterNode(&node) {
				masterNodes.Insert(node.Name)
			} else {
				nodeList.Items = append(nodeList.Items, node)
			}
		}

		err = framework.CheckTestingNSDeletedExcept(c, ns)
		framework.ExpectNoError(err)

		// Every test case in this suite assumes that cluster add-on pods stay stable and
		// cannot be run in parallel with any other test that touches Nodes or Pods.
		// It is so because we need to have precise control on what's running in the cluster.
		systemPods, err := framework.GetPodsInNamespace(c, ns, ignoreLabels)
		Expect(err).NotTo(HaveOccurred())
		systemPodsNo = 0

// monitorNodeStatus verifies node status are constantly updated by kubelet, and if not,
// post "NodeReady==ConditionUnknown". It also evicts all pods if node is not ready or
// not reachable for a long period of time.
func (nc *NodeController) monitorNodeStatus() error {
	nodes, err := nc.kubeClient.Core().Nodes().List(api.ListOptions{})
	if err != nil {
		return err
	}
	for _, node := range nodes.Items {
		if !nc.knownNodeSet.Has(node.Name) {
			glog.V(1).Infof("NodeController observed a new Node: %#v", node)
			nc.recordNodeEvent(node.Name, api.EventTypeNormal, "RegisteredNode", fmt.Sprintf("Registered Node %v in NodeController", node.Name))
			nc.cancelPodEviction(node.Name)
			nc.knownNodeSet.Insert(node.Name)
		}
	}
	// If there's a difference between lengths of known Nodes and observed nodes
	// we must have removed some Node.
	if len(nc.knownNodeSet) != len(nodes.Items) {
		observedSet := make(sets.String)
		for _, node := range nodes.Items {
			observedSet.Insert(node.Name)
		}
		deleted := nc.knownNodeSet.Difference(observedSet)
		for nodeName := range deleted {
			glog.V(1).Infof("NodeController observed a Node deletion: %v", nodeName)
			nc.recordNodeEvent(nodeName, api.EventTypeNormal, "RemovingNode", fmt.Sprintf("Removing Node %v from NodeController", nodeName))
			nc.evictPods(nodeName)
			nc.knownNodeSet.Delete(nodeName)
		}
	}

	seenReady := false
	for i := range nodes.Items {
		var gracePeriod time.Duration
		var observedReadyCondition api.NodeCondition
		var currentReadyCondition *api.NodeCondition
		node := &nodes.Items[i]
		for rep := 0; rep < nodeStatusUpdateRetry; rep++ {
			gracePeriod, observedReadyCondition, currentReadyCondition, err = nc.tryUpdateNodeStatus(node)
			if err == nil {
				break
			}
			name := node.Name
			node, err = nc.kubeClient.Core().Nodes().Get(name)
			if err != nil {
				glog.Errorf("Failed while getting a Node to retry updating NodeStatus. Probably Node %s was deleted.", name)
				break
			}
		}
		if err != nil {
			glog.Errorf("Update status  of Node %v from NodeController exceeds retry count."+
				"Skipping - no pods will be evicted.", node.Name)
			continue
		}

		decisionTimestamp := nc.now()

		if currentReadyCondition != nil {
			// Check eviction timeout against decisionTimestamp
			if observedReadyCondition.Status == api.ConditionFalse &&
				decisionTimestamp.After(nc.nodeStatusMap[node.Name].readyTransitionTimestamp.Add(nc.podEvictionTimeout)) {
				if nc.evictPods(node.Name) {
					glog.V(4).Infof("Evicting pods on node %s: %v is later than %v + %v", node.Name, decisionTimestamp, nc.nodeStatusMap[node.Name].readyTransitionTimestamp, nc.podEvictionTimeout)
				}
			}
			if observedReadyCondition.Status == api.ConditionUnknown &&
				decisionTimestamp.After(nc.nodeStatusMap[node.Name].probeTimestamp.Add(nc.podEvictionTimeout)) {
				if nc.evictPods(node.Name) {
					glog.V(4).Infof("Evicting pods on node %s: %v is later than %v + %v", node.Name, decisionTimestamp, nc.nodeStatusMap[node.Name].readyTransitionTimestamp, nc.podEvictionTimeout-gracePeriod)
				}
			}
			if observedReadyCondition.Status == api.ConditionTrue {
				// We do not treat a master node as a part of the cluster for network segmentation checking.
				if !system.IsMasterNode(node) {
					seenReady = true
				}
				if nc.cancelPodEviction(node.Name) {
					glog.V(2).Infof("Node %s is ready again, cancelled pod eviction", node.Name)
				}
			}

			// Report node event.
			if currentReadyCondition.Status != api.ConditionTrue && observedReadyCondition.Status == api.ConditionTrue {
				nc.recordNodeStatusChange(node, "NodeNotReady")
				if err = nc.markAllPodsNotReady(node.Name); err != nil {
					utilruntime.HandleError(fmt.Errorf("Unable to mark all pods NotReady on node %v: %v", node.Name, err))
				}
			}

			// Check with the cloud provider to see if the node still exists. If it
			// doesn't, delete the node immediately.
			if currentReadyCondition.Status != api.ConditionTrue && nc.cloud != nil {
				exists, err := nc.nodeExistsInCloudProvider(node.Name)
				if err != nil {
					glog.Errorf("Error determining if node %v exists in cloud: %v", node.Name, err)
					continue
				}
				if !exists {
					glog.V(2).Infof("Deleting node (no longer present in cloud provider): %s", node.Name)
//.........这里部分代码省略.........

					"pattern": "` + tempMessage + `"
				},
				{
					"type": "permanent",
					"condition": "` + string(condition) + `",
					"reason": "` + permReason + `",
					"pattern": "` + permMessage + `"
				}
				]
			}`
			By("Get a non master node to run the pod")
			nodes, err := c.Nodes().List(api.ListOptions{})
			Expect(err).NotTo(HaveOccurred())
			node = nil
			for _, n := range nodes.Items {
				if !system.IsMasterNode(&n) {
					node = &n
					break
				}
			}
			Expect(node).NotTo(BeNil())
			By("Generate event list options")
			selector := fields.Set{
				"involvedObject.kind":      "Node",
				"involvedObject.name":      node.Name,
				"involvedObject.namespace": api.NamespaceAll,
				"source":                   source,
			}.AsSelector()
			eventListOptions = api.ListOptions{FieldSelector: selector}
			By("Create the test log file")
			tmpDir = "/tmp/" + name

					"pattern": "` + tempMessage + `"
				},
				{
					"type": "permanent",
					"condition": "` + string(condition) + `",
					"reason": "` + permReason + `",
					"pattern": "` + permMessage + `"
				}
				]
			}`
			By("Get a non master node to run the pod")
			nodes, err := c.Core().Nodes().List(v1.ListOptions{})
			Expect(err).NotTo(HaveOccurred())
			node = nil
			for _, n := range nodes.Items {
				if !system.IsMasterNode(n.Name) {
					node = &n
					break
				}
			}
			Expect(node).NotTo(BeNil())
			By("Generate event list options")
			selector := fields.Set{
				"involvedObject.kind":      "Node",
				"involvedObject.name":      node.Name,
				"involvedObject.namespace": v1.NamespaceAll,
				"source":                   source,
			}.AsSelector().String()
			eventListOptions = v1.ListOptions{FieldSelector: selector}
			By("Create the test log file")
			tmpDir = "/tmp/" + name

// monitorNodeStatus verifies node status are constantly updated by kubelet, and if not,
// post "NodeReady==ConditionUnknown". It also evicts all pods if node is not ready or
// not reachable for a long period of time.
func (nc *NodeController) monitorNodeStatus() error {
	nodes, err := nc.kubeClient.Core().Nodes().List(api.ListOptions{})
	if err != nil {
		return err
	}
	added, deleted := nc.checkForNodeAddedDeleted(nodes)
	for i := range added {
		glog.V(1).Infof("NodeController observed a new Node: %#v", added[i].Name)
		recordNodeEvent(nc.recorder, added[i].Name, api.EventTypeNormal, "RegisteredNode", fmt.Sprintf("Registered Node %v in NodeController", added[i].Name))
		nc.knownNodeSet[added[i].Name] = added[i]
		// When adding new Nodes we need to check if new zone appeared, and if so add new evictor.
		zone := utilnode.GetZoneKey(added[i])
		if _, found := nc.zonePodEvictor[zone]; !found {
			nc.zonePodEvictor[zone] =
				NewRateLimitedTimedQueue(
					flowcontrol.NewTokenBucketRateLimiter(nc.evictionLimiterQPS, evictionRateLimiterBurst))
		}
		if _, found := nc.zoneTerminationEvictor[zone]; !found {
			nc.zoneTerminationEvictor[zone] = NewRateLimitedTimedQueue(
				flowcontrol.NewTokenBucketRateLimiter(nc.evictionLimiterQPS, evictionRateLimiterBurst))
		}
		nc.cancelPodEviction(added[i])
	}

	for i := range deleted {
		glog.V(1).Infof("NodeController observed a Node deletion: %v", deleted[i].Name)
		recordNodeEvent(nc.recorder, deleted[i].Name, api.EventTypeNormal, "RemovingNode", fmt.Sprintf("Removing Node %v from NodeController", deleted[i].Name))
		nc.evictPods(deleted[i])
		delete(nc.knownNodeSet, deleted[i].Name)
	}

	zoneToNodeConditions := map[string][]*api.NodeCondition{}
	for i := range nodes.Items {
		var gracePeriod time.Duration
		var observedReadyCondition api.NodeCondition
		var currentReadyCondition *api.NodeCondition
		node := &nodes.Items[i]
		for rep := 0; rep < nodeStatusUpdateRetry; rep++ {
			gracePeriod, observedReadyCondition, currentReadyCondition, err = nc.tryUpdateNodeStatus(node)
			if err == nil {
				break
			}
			name := node.Name
			node, err = nc.kubeClient.Core().Nodes().Get(name)
			if err != nil {
				glog.Errorf("Failed while getting a Node to retry updating NodeStatus. Probably Node %s was deleted.", name)
				break
			}
		}
		if err != nil {
			glog.Errorf("Update status  of Node %v from NodeController exceeds retry count."+
				"Skipping - no pods will be evicted.", node.Name)
			continue
		}
		// We do not treat a master node as a part of the cluster for network segmentation checking.
		if !system.IsMasterNode(node) {
			zoneToNodeConditions[utilnode.GetZoneKey(node)] = append(zoneToNodeConditions[utilnode.GetZoneKey(node)], currentReadyCondition)
		}

		decisionTimestamp := nc.now()
		if currentReadyCondition != nil {
			// Check eviction timeout against decisionTimestamp
			if observedReadyCondition.Status == api.ConditionFalse &&
				decisionTimestamp.After(nc.nodeStatusMap[node.Name].readyTransitionTimestamp.Add(nc.podEvictionTimeout)) {
				if nc.evictPods(node) {
					glog.V(4).Infof("Evicting pods on node %s: %v is later than %v + %v", node.Name, decisionTimestamp, nc.nodeStatusMap[node.Name].readyTransitionTimestamp, nc.podEvictionTimeout)
				}
			}
			if observedReadyCondition.Status == api.ConditionUnknown &&
				decisionTimestamp.After(nc.nodeStatusMap[node.Name].probeTimestamp.Add(nc.podEvictionTimeout)) {
				if nc.evictPods(node) {
					glog.V(4).Infof("Evicting pods on node %s: %v is later than %v + %v", node.Name, decisionTimestamp, nc.nodeStatusMap[node.Name].readyTransitionTimestamp, nc.podEvictionTimeout-gracePeriod)
				}
			}
			if observedReadyCondition.Status == api.ConditionTrue {
				if nc.cancelPodEviction(node) {
					glog.V(2).Infof("Node %s is ready again, cancelled pod eviction", node.Name)
				}
			}

			// Report node event.
			if currentReadyCondition.Status != api.ConditionTrue && observedReadyCondition.Status == api.ConditionTrue {
				recordNodeStatusChange(nc.recorder, node, "NodeNotReady")
				if err = markAllPodsNotReady(nc.kubeClient, node.Name); err != nil {
					utilruntime.HandleError(fmt.Errorf("Unable to mark all pods NotReady on node %v: %v", node.Name, err))
				}
			}

			// Check with the cloud provider to see if the node still exists. If it
			// doesn't, delete the node immediately.
			if currentReadyCondition.Status != api.ConditionTrue && nc.cloud != nil {
				exists, err := nc.nodeExistsInCloudProvider(node.Name)
				if err != nil {
					glog.Errorf("Error determining if node %v exists in cloud: %v", node.Name, err)
					continue
				}
				if !exists {
//.........这里部分代码省略.........