fix golint failures of test/e2e_node/services

hack/.golint_failures

@@ -613,5 +613,4 @@ test/e2e_kubeadm
 test/e2e_node
 test/e2e_node/remote
 test/e2e_node/runner/remote
-test/e2e_node/services
 test/utils

test/e2e_node/services/apiserver.go

@@ -90,6 +90,7 @@ func (a *APIServer) Stop() error {
 
 const apiserverName = "apiserver"
 
+// Name returns the name of APIServer.
 func (a *APIServer) Name() string {
 	return apiserverName
 }

test/e2e_node/services/internal_services.go

@@ -60,7 +60,7 @@ func (es *e2eServices) start(t *testing.T) error {
 	if err != nil {
 		return err
 	}
-	err = es.startApiServer(es.etcdStorage)
+	err = es.startAPIServer(es.etcdStorage)
 	if err != nil {
 		return err
 	}
@@ -116,8 +116,8 @@ func (es *e2eServices) startEtcd(t *testing.T) error {
 	return nil
 }
 
-// startApiServer starts the embedded API server or returns an error.
-func (es *e2eServices) startApiServer(etcdStorage *storagebackend.Config) error {
+// startAPIServer starts the embedded API server or returns an error.
+func (es *e2eServices) startAPIServer(etcdStorage *storagebackend.Config) error {
 	klog.Info("Starting API server")
 	es.apiServer = NewAPIServer(*etcdStorage)
 	return es.apiServer.Start()

test/e2e_node/services/kubelet.go

@@ -91,8 +91,9 @@ func RunKubelet() {
 
 const (
 	// Ports of different e2e services.
-	kubeletPort          = "10250"
-	kubeletReadOnlyPort  = "10255"
+	kubeletPort         = "10250"
+	kubeletReadOnlyPort = "10255"
+	// KubeletRootDirectory specifies the directory where the kubelet runtime information is stored.
 	KubeletRootDirectory = "/var/lib/kubelet"
 	// Health check url of kubelet
 	kubeletHealthCheckURL = "http://127.0.0.1:" + kubeletReadOnlyPort + "/healthz"
@@ -258,7 +259,7 @@ func (e *E2EServices) startKubelet() (*server, error) {
 	cmdArgs = append(cmdArgs,
 		"--kubeconfig", kubeconfigPath,
 		"--root-dir", KubeletRootDirectory,
-		"--v", LOG_VERBOSITY_LEVEL, "--logtostderr",
+		"--v", LogVerbosityLevel, "--logtostderr",
 		"--allow-privileged=true",
 	)
 
@@ -412,9 +413,8 @@ func createRootDirectory(path string) error {
 	if _, err := os.Stat(path); err != nil {
 		if os.IsNotExist(err) {
 			return os.MkdirAll(path, os.FileMode(0755))
-		} else {
-			return err
 		}
+		return err
 	}
 	return nil
 }

test/e2e_node/services/server.go

@@ -106,7 +106,7 @@ func (s *server) start() error {
 	var stopRestartingCh, ackStopRestartingCh chan bool
 	if s.restartOnExit {
 		if len(s.healthCheckUrls) == 0 {
-			return fmt.Errorf("Tried to start %s which has s.restartOnExit == true, but no health check urls provided.", s)
+			return fmt.Errorf("tried to start %s which has s.restartOnExit == true, but no health check urls provided", s)
 		}
 
 		stopRestartingCh = make(chan bool)
@@ -124,11 +124,10 @@ func (s *server) start() error {
 		outPath := path.Join(framework.TestContext.ReportDir, s.outFilename)
 		outfile, err := os.Create(outPath)
 		if err != nil {
-			errCh <- fmt.Errorf("failed to create file %q for `%s` %v.", outPath, s, err)
+			errCh <- fmt.Errorf("failed to create file %q for `%s` %v", outPath, s, err)
 			return
-		} else {
-			klog.Infof("Output file for server %q: %v", s.name, outfile.Name())
 		}
+		klog.Infof("Output file for server %q: %v", s.name, outfile.Name())
 		defer outfile.Close()
 		defer outfile.Sync()
 

test/e2e_node/services/services.go

@@ -121,8 +121,8 @@ func RunE2EServices(t *testing.T) {
 const (
 	// services.log is the combined log of all services
 	servicesLogFile = "services.log"
-	// LOG_VERBOSITY_LEVEL is consistent with the level used in a cluster e2e test.
-	LOG_VERBOSITY_LEVEL = "4"
+	// LogVerbosityLevel is consistent with the level used in a cluster e2e test.
+	LogVerbosityLevel = "4"
 )
 
 // startInternalServices starts the internal services in a separate process.