Support collecting log for alternative container runtime in e2e test.

cluster/log-dump/log-dump.sh

@@ -50,7 +50,7 @@ readonly gce_logfiles="startupscript"
 readonly kern_logfile="kern"
 readonly initd_logfiles="docker"
 readonly supervisord_logfiles="kubelet supervisor/supervisord supervisor/kubelet-stdout supervisor/kubelet-stderr supervisor/docker-stdout supervisor/docker-stderr"
-readonly systemd_services="kubelet docker"
+readonly systemd_services="kubelet ${SYSTEMD_SERVICES:-docker}"
 
 # Limit the number of concurrent node connections so that we don't run out of
 # file descriptors for large clusters.

test/e2e/framework/test_context.go

@@ -65,6 +65,9 @@ type TestContextType struct {
 	GCEUpgradeScript         string
 	ContainerRuntime         string
 	ContainerRuntimeEndpoint string
+	// SystemdServices are comma separated list of systemd services the test framework
+	// will dump logs for.
+	SystemdServices          string
 	ImageServiceEndpoint     string
 	MasterOSDistro           string
 	NodeOSDistro             string
@@ -199,6 +202,7 @@ func RegisterCommonFlags() {
 	flag.StringVar(&TestContext.Viper, "viper-config", "e2e", "The name of the viper config i.e. 'e2e' will read values from 'e2e.json' locally.  All e2e parameters are meant to be configurable by viper.")
 	flag.StringVar(&TestContext.ContainerRuntime, "container-runtime", "docker", "The container runtime of cluster VM instances (docker/rkt/remote).")
 	flag.StringVar(&TestContext.ContainerRuntimeEndpoint, "container-runtime-endpoint", "", "The container runtime endpoint of cluster VM instances.")
+	flag.StringVar(&TestContext.SystemdServices, "systemd-services", "docker", "The comma separated list of systemd services the framework will dump logs for.")
 	flag.StringVar(&TestContext.ImageServiceEndpoint, "image-service-endpoint", "", "The image service endpoint of cluster VM instances.")
 	flag.StringVar(&TestContext.DockershimCheckpointDir, "dockershim-checkpoint-dir", "/var/lib/dockershim/sandbox", "The directory for dockershim to store sandbox checkpoints.")
 	flag.StringVar(&TestContext.KubernetesAnywherePath, "kubernetes-anywhere-path", "/workspace/kubernetes-anywhere", "Which directory kubernetes-anywhere is installed to.")

test/e2e/framework/util.go

@@ -4517,6 +4517,7 @@ func CoreDump(dir string) {
 		Logf("Dumping logs locally to: %s", dir)
 		cmd = exec.Command(path.Join(TestContext.RepoRoot, "cluster", "log-dump", "log-dump.sh"), dir)
 	}
+	cmd.Env = append(os.Environ(), fmt.Sprintf("SYSTEMD_SERVICES=%s", parseSystemdServices(TestContext.SystemdServices)))
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	if err := cmd.Run(); err != nil {
@@ -4524,6 +4525,11 @@ func CoreDump(dir string) {
 	}
 }
 
+// parseSystemdServices converts services separator from comma to space.
+func parseSystemdServices(services string) string {
+	return strings.TrimSpace(strings.Replace(services, ",", " ", -1))
+}
+
 func UpdatePodWithRetries(client clientset.Interface, ns, name string, update func(*v1.Pod)) (*v1.Pod, error) {
 	for i := 0; i < 3; i++ {
 		pod, err := client.CoreV1().Pods(ns).Get(name, metav1.GetOptions{})