Merge pull request #20108 from yujuhong/get_logs

e2e reboot: print status and logs for not running/ready pods

test/e2e/downwardapi_volume.go

@@ -18,11 +18,9 @@ package e2e
 
 import (
 	"fmt"
-	"strings"
 	"time"
 
 	"k8s.io/kubernetes/pkg/api"
-	client "k8s.io/kubernetes/pkg/client/unversioned"
 	"k8s.io/kubernetes/pkg/util"
 
 	. "github.com/onsi/ginkgo"
@@ -32,18 +30,6 @@ import (
 // How long to wait for a log pod to be displayed
 const podLogTimeout = 45 * time.Second
 
-// utility function for gomega Eventually
-func getPodLogs(c *client.Client, namespace, podName, containerName string) (string, error) {
-	logs, err := c.Get().Resource("pods").Namespace(namespace).Name(podName).SubResource("log").Param("container", containerName).Do().Raw()
-	if err != nil {
-		return "", err
-	}
-	if err == nil && strings.Contains(string(logs), "Internal Error") {
-		return "", fmt.Errorf("Internal Error")
-	}
-	return string(logs), err
-}
-
 var _ = Describe("Downward API volume", func() {
 	f := NewFramework("downward-api")
 	It("should provide podname only [Conformance]", func() {

test/e2e/reboot.go

@@ -157,6 +157,41 @@ func testReboot(c *client.Client, rebootCmd string) {
 	}
 }
 
+func printStatusAndLogsForNotReadyPods(c *client.Client, oldPods, newPods []*api.Pod) {
+	printFn := func(id, log string, err error, previous bool) {
+		prefix := "Retrieving log for container"
+		if previous {
+			prefix = "Retrieving log for the last terminated container"
+		}
+		if err != nil {
+			Logf("%s %s, err: %v:\n%s\n", prefix, id, log)
+		} else {
+			Logf("%s %s:\n%s\n", prefix, id, log)
+		}
+	}
+	for _, oldPod := range oldPods {
+		for _, p := range newPods {
+			if p.Namespace != oldPod.Namespace || p.Name != oldPod.Name {
+				continue
+			}
+			if ok, _ := podRunningReady(p); !ok {
+				Logf("Status for not ready pod %s/%s: %+v", p.Namespace, p.Name, p.Status)
+				// Print the log of the containers if pod is not running and ready.
+				for _, container := range p.Status.ContainerStatuses {
+					cIdentifer := fmt.Sprintf("%s/%s/%s", p.Namespace, p.Name, container.Name)
+					log, err := getPodLogs(c, p.Namespace, p.Name, container.Name)
+					printFn(cIdentifer, log, err, false)
+					// Get log from the previous container.
+					if container.RestartCount > 0 {
+						printFn(cIdentifer, log, err, true)
+					}
+				}
+			}
+			break
+		}
+	}
+}
+
 // rebootNode takes node name on provider through the following steps using c:
 //  - ensures the node is ready
 //  - ensures all pods on the node are running and ready
@@ -229,6 +264,8 @@ func rebootNode(c *client.Client, provider, name, rebootCmd string) bool {
 	// Ensure all of the pods that we found on this node before the reboot are
 	// running / healthy.
 	if !checkPodsRunningReady(c, ns, podNames, rebootPodReadyAgainTimeout) {
+		newPods := ps.List()
+		printStatusAndLogsForNotReadyPods(c, pods, newPods)
 		return false
 	}
 

test/e2e/util.go

@@ -1339,23 +1339,13 @@ func testContainerOutputMatcher(scenarioName string,
 
 	By(fmt.Sprintf("Trying to get logs from node %s pod %s container %s: %v",
 		podStatus.Spec.NodeName, podStatus.Name, containerName, err))
-	var logs []byte
+	var logs string
 	start := time.Now()
 
 	// Sometimes the actual containers take a second to get started, try to get logs for 60s
 	for time.Now().Sub(start) < (60 * time.Second) {
 		err = nil
-		logs, err = c.Get().
-			Resource("pods").
-			Namespace(ns).
-			Name(pod.Name).
-			SubResource("log").
-			Param("container", containerName).
-			Do().
-			Raw()
-		if err == nil && strings.Contains(string(logs), "Internal Error") {
-			err = fmt.Errorf("Fetched log contains \"Internal Error\": %q.", string(logs))
-		}
+		logs, err = getPodLogs(c, ns, pod.Name, containerName)
 		if err != nil {
 			By(fmt.Sprintf("Warning: Failed to get logs from node %q pod %q container %q. %v",
 				podStatus.Spec.NodeName, podStatus.Name, containerName, err))
@@ -1363,12 +1353,12 @@ func testContainerOutputMatcher(scenarioName string,
 			continue
 
 		}
-		By(fmt.Sprintf("Successfully fetched pod logs:%v\n", string(logs)))
+		By(fmt.Sprintf("Successfully fetched pod logs:%v\n", logs))
 		break
 	}
 
 	for _, m := range expectedOutput {
-		Expect(string(logs)).To(matcher(m), "%q in container output", m)
+		Expect(logs).To(matcher(m), "%q in container output", m)
 	}
 }
 
@@ -2716,3 +2706,30 @@ func scaleRCByName(client *client.Client, ns, name string, replicas uint) error
 			client, ns, labels.SelectorFromSet(labels.Set(rc.Spec.Selector)))
 	}
 }
+
+func getPodLogs(c *client.Client, namespace, podName, containerName string) (string, error) {
+	return getPodLogsInternal(c, namespace, podName, containerName, false)
+}
+
+func getPreviousPodLogs(c *client.Client, namespace, podName, containerName string) (string, error) {
+	return getPodLogsInternal(c, namespace, podName, containerName, true)
+}
+
+// utility function for gomega Eventually
+func getPodLogsInternal(c *client.Client, namespace, podName, containerName string, previous bool) (string, error) {
+	logs, err := c.Get().
+		Resource("pods").
+		Namespace(namespace).
+		Name(podName).SubResource("log").
+		Param("container", containerName).
+		Param("previous", strconv.FormatBool(previous)).
+		Do().
+		Raw()
+	if err != nil {
+		return "", err
+	}
+	if err == nil && strings.Contains(string(logs), "Internal Error") {
+		return "", fmt.Errorf("Fetched log contains \"Internal Error\": %q.", string(logs))
+	}
+	return string(logs), err
+}