Merge pull request #18448 from freehan/eslogging

add validation for fluentd pods

cluster/saltbase/salt/fluentd-es/fluentd-es.yaml

@@ -3,6 +3,8 @@ kind: Pod
 metadata:
   name: fluentd-elasticsearch
   namespace: kube-system
+  labels:
+    k8s-app: fluentd-logging
 spec:
   containers:
   - name: fluentd-elasticsearch

cluster/saltbase/salt/fluentd-gcp/fluentd-gcp.yaml

@@ -3,6 +3,8 @@ kind: Pod
 metadata:
   name: fluentd-cloud-logging
   namespace: kube-system
+  labels:
+    k8s-app: fluentd-logging
 spec:
   containers:
   - name: fluentd-cloud-logging

docs/getting-started-guides/logging.md

@@ -166,6 +166,8 @@ kind: Pod
 metadata:
   name: fluentd-cloud-logging
   namespace: kube-system
+  labels:
+    k8s-app: fluentd-logging
 spec:
   containers:
   - name: fluentd-cloud-logging

test/e2e/es_cluster_logging.go

@@ -46,8 +46,9 @@ var _ = Describe("Cluster level logging using Elasticsearch", func() {
 })
 
 const (
-	esKey   = "k8s-app"
-	esValue = "elasticsearch-logging"
+	k8sAppKey    = "k8s-app"
+	esValue      = "elasticsearch-logging"
+	fluentdValue = "fluentd-logging"
 )
 
 func bodyToJSON(body []byte) (map[string]interface{}, error) {
@@ -59,6 +60,15 @@ func bodyToJSON(body []byte) (map[string]interface{}, error) {
 	return r, nil
 }
 
+func nodeInNodeList(nodeName string, nodeList *api.NodeList) bool {
+	for _, node := range nodeList.Items {
+		if nodeName == node.Name {
+			return true
+		}
+	}
+	return false
+}
+
 // ClusterLevelLoggingWithElasticsearch is an end to end test for cluster level logging.
 func ClusterLevelLoggingWithElasticsearch(f *Framework) {
 	// graceTime is how long to keep retrying requests for status information.
@@ -83,7 +93,7 @@ func ClusterLevelLoggingWithElasticsearch(f *Framework) {
 
 	// Wait for the Elasticsearch pods to enter the running state.
 	By("Checking to make sure the Elasticsearch pods are running")
-	label := labels.SelectorFromSet(labels.Set(map[string]string{esKey: esValue}))
+	label := labels.SelectorFromSet(labels.Set(map[string]string{k8sAppKey: esValue}))
 	options := api.ListOptions{LabelSelector: label}
 	pods, err := f.Client.Pods(api.NamespaceSystem).List(options)
 	Expect(err).NotTo(HaveOccurred())
@@ -152,13 +162,14 @@ func ClusterLevelLoggingWithElasticsearch(f *Framework) {
 			Resource("services").
 			Name("elasticsearch-logging").
 			Suffix("_cluster/health").
-			Param("health", "pretty").
+			Param("level", "indices").
 			DoRaw()
 		if err != nil {
 			continue
 		}
 		health, err := bodyToJSON(body)
 		if err != nil {
+			Logf("Bad json response from elasticsearch: %v", err)
 			continue
 		}
 		statusIntf, ok := health["status"]
@@ -168,7 +179,7 @@ func ClusterLevelLoggingWithElasticsearch(f *Framework) {
 		}
 		status := statusIntf.(string)
 		if status != "green" && status != "yellow" {
-			Logf("Cluster health has bad status: %s", status)
+			Logf("Cluster health has bad status: %v", health)
 			continue
 		}
 		if err == nil && ok {
@@ -202,6 +213,33 @@ func ClusterLevelLoggingWithElasticsearch(f *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}
+	pods, err = f.Client.Pods(api.NamespaceSystem).List(options)
+	Expect(err).NotTo(HaveOccurred())
+	for _, pod := range pods.Items {
+		if nodeInNodeList(pod.Spec.NodeName, nodes) {
+			err = waitForPodRunningInNamespace(f.Client, pod.Name, api.NamespaceSystem)
+			Expect(err).NotTo(HaveOccurred())
+		}
+	}
+
+	// Check if each healthy node has fluentd running on it
+	for _, node := range nodes.Items {
+		exists := false
+		for _, pod := range pods.Items {
+			if pod.Spec.NodeName == node.Name {
+				exists = true
+				break
+			}
+		}
+		if !exists {
+			Failf("Node %v does not have fluentd pod running on it.", node.Name)
+		}
+	}
+
 	// Create a unique root name for the resources in this test to permit
 	// parallel executions of this test.
 	// Use a unique namespace for the resources created in this test.
@@ -268,7 +306,7 @@ func ClusterLevelLoggingWithElasticsearch(f *Framework) {
 	for start := time.Now(); time.Since(start) < ingestionTimeout; time.Sleep(10 * time.Second) {
 
 		// Debugging code to report the status of the elasticsearch logging endpoints.
-		selector := labels.Set{esKey: esValue}.AsSelector()
+		selector := labels.Set{k8sAppKey: esValue}.AsSelector()
 		options := api.ListOptions{LabelSelector: selector}
 		esPods, err := f.Client.Pods(api.NamespaceSystem).List(options)
 		if err != nil {
@@ -386,6 +424,13 @@ func ClusterLevelLoggingWithElasticsearch(f *Framework) {
 	for n := range missingPerNode {
 		if missingPerNode[n] > 0 {
 			Logf("Node %d is missing %d logs", n, missingPerNode[n])
+			opts := &api.PodLogOptions{}
+			body, err = f.Client.Pods(ns).GetLogs(podNames[n], opts).DoRaw()
+			if err != nil {
+				Logf("Cannot get logs from pod %v", podNames[n])
+				continue
+			}
+			Logf("Pod %s has the following logs: %s", podNames[n], body)
 		}
 	}
 	Failf("Failed to find all %d log lines", expected)