Golang framework.FilterNodes函數代碼示例

// WaitForClusterSize waits until the cluster size matches the given function.
func WaitForClusterSizeFunc(c clientset.Interface, sizeFunc func(int) bool, timeout time.Duration) error {
	for start := time.Now(); time.Since(start) < timeout; time.Sleep(20 * time.Second) {
		nodes, err := c.Core().Nodes().List(v1.ListOptions{FieldSelector: fields.Set{
			"spec.unschedulable": "false",
		}.AsSelector().String()})
		if err != nil {
			glog.Warningf("Failed to list nodes: %v", err)
			continue
		}
		numNodes := len(nodes.Items)

		// Filter out not-ready nodes.
		framework.FilterNodes(nodes, func(node v1.Node) bool {
			return framework.IsNodeConditionSetAsExpected(&node, v1.NodeReady, true)
		})
		numReady := len(nodes.Items)

		if numNodes == numReady && sizeFunc(numReady) {
			glog.Infof("Cluster has reached the desired size")
			return nil
		}
		glog.Infof("Waiting for cluster, current size %d, not ready nodes %d", numNodes, numNodes-numReady)
	}
	return fmt.Errorf("timeout waiting %v for appropriate cluster size", timeout)
}

			// 1. Node is marked NotReady after timeout by nodecontroller (40seconds)
			// 2. All pods on node are marked NotReady shortly after #1
			// 3. Node and pods return to Ready after connectivivty recovers
			It("All pods on the unreachable node should be marked as NotReady upon the node turn NotReady "+
				"AND all pods should be mark back to Ready when the node get back to Ready before pod eviction timeout", func() {
				By("choose a node - we will block all network traffic on this node")
				var podOpts api.ListOptions
				nodeOpts := api.ListOptions{}
				nodes, err := c.Nodes().List(nodeOpts)
				Expect(err).NotTo(HaveOccurred())
				framework.FilterNodes(nodes, func(node api.Node) bool {
					if !framework.IsNodeConditionSetAsExpected(&node, api.NodeReady, true) {
						return false
					}
					podOpts = api.ListOptions{FieldSelector: fields.OneTermEqualSelector(api.PodHostField, node.Name)}
					pods, err := c.Pods(api.NamespaceAll).List(podOpts)
					if err != nil || len(pods.Items) <= 0 {
						return false
					}
					return true
				})
				if len(nodes.Items) <= 0 {
					framework.Failf("No eligible node were found: %d", len(nodes.Items))
				}
				node := nodes.Items[0]
				podOpts = api.ListOptions{FieldSelector: fields.OneTermEqualSelector(api.PodHostField, node.Name)}
				if err = framework.WaitForMatchPodsCondition(c, podOpts, "Running and Ready", podReadyTimeout, framework.PodRunningReady); err != nil {
					framework.Failf("Pods on node %s are not ready and running within %v: %v", node.Name, podReadyTimeout, err)
				}

				By("Set up watch on node status")

//.........這裏部分代碼省略.........
			framework.Logf("Bad json response from elasticsearch: %v", err)
			continue
		}
		statusIntf, ok := health["status"]
		if !ok {
			framework.Logf("No status field found in cluster health response: %v", health)
			continue
		}
		status := statusIntf.(string)
		if status != "green" && status != "yellow" {
			framework.Logf("Cluster health has bad status: %v", health)
			continue
		}
		if err == nil && ok {
			healthy = true
			break
		}
	}
	if !healthy {
		framework.Failf("After %v elasticsearch cluster is not healthy", graceTime)
	}

	// Obtain a list of nodes so we can place one synthetic logger on each node.
	nodes := framework.GetReadySchedulableNodesOrDie(f.Client)
	nodeCount := len(nodes.Items)
	if nodeCount == 0 {
		framework.Failf("Failed to find any nodes")
	}
	framework.Logf("Found %d nodes.", len(nodes.Items))

	// Filter out unhealthy nodes.
	// Previous tests may have cause failures of some nodes. Let's skip
	// 'Not Ready' nodes, just in case (there is no need to fail the test).
	framework.FilterNodes(nodes, func(node api.Node) bool {
		return framework.IsNodeConditionSetAsExpected(&node, api.NodeReady, true)
	})
	if len(nodes.Items) < 2 {
		framework.Failf("Less than two nodes were found Ready: %d", len(nodes.Items))
	}
	framework.Logf("Found %d healthy nodes.", len(nodes.Items))

	// Wait for the Fluentd pods to enter the running state.
	By("Checking to make sure the Fluentd pod are running on each healthy node")
	label = labels.SelectorFromSet(labels.Set(map[string]string{k8sAppKey: fluentdValue}))
	options = api.ListOptions{LabelSelector: label}
	fluentdPods, err := f.Client.Pods(api.NamespaceSystem).List(options)
	Expect(err).NotTo(HaveOccurred())
	for _, pod := range fluentdPods.Items {
		if nodeInNodeList(pod.Spec.NodeName, nodes) {
			err = framework.WaitForPodRunningInNamespace(f.Client, &pod)
			Expect(err).NotTo(HaveOccurred())
		}
	}

	// Check if each healthy node has fluentd running on it
	for _, node := range nodes.Items {
		exists := false
		for _, pod := range fluentdPods.Items {
			if pod.Spec.NodeName == node.Name {
				exists = true
				break
			}
		}
		if !exists {
			framework.Failf("Node %v does not have fluentd pod running on it.", node.Name)
		}