fix golint failures of test/e2e/storage

hack/.golint_failures

@@ -610,7 +610,6 @@ test/e2e/network
 test/e2e/node
 test/e2e/scalability
 test/e2e/scheduling
-test/e2e/storage
 test/e2e/storage/drivers
 test/e2e/storage/testsuites
 test/e2e/storage/utils

test/e2e/storage/csi_mock_volume.go

@@ -756,12 +756,11 @@ func checkPodInfo(cs clientset.Interface, namespace, driverPodName, driverContai
 			return fmt.Errorf("number of found volume attributes does not match, expected %d, got %d", len(expectedAttributes), foundAttributes.Len())
 		}
 		return nil
-	} else {
-		if foundAttributes.Len() != 0 {
-			return fmt.Errorf("some unexpected volume attributes were found: %+v", foundAttributes.List())
-		}
-		return nil
 	}
+	if foundAttributes.Len() != 0 {
+		return fmt.Errorf("some unexpected volume attributes were found: %+v", foundAttributes.List())
+	}
+	return nil
 }
 
 func waitForCSIDriver(cs clientset.Interface, driverName string) error {
@@ -774,7 +773,7 @@ func waitForCSIDriver(cs clientset.Interface, driverName string) error {
 			return err
 		}
 	}
-	return fmt.Errorf("gave up after waiting %v for CSIDriver %q.", timeout, driverName)
+	return fmt.Errorf("gave up after waiting %v for CSIDriver %q", timeout, driverName)
 }
 
 func destroyCSIDriver(cs clientset.Interface, driverName string) {

test/e2e/storage/detach_mounted.go

@@ -35,6 +35,7 @@ import (
 )
 
 var (
+	// BusyBoxImage is the image URI of BusyBox.
 	BusyBoxImage          = imageutils.GetE2EImage(imageutils.BusyBox)
 	durationForStuckMount = 110 * time.Second
 )

test/e2e/storage/nfs_persistent_volume-disruptive.go

@@ -39,10 +39,6 @@ type disruptiveTest struct {
 	runTest    testBody
 }
 
-const (
-	MinNodes = 2
-)
-
 var _ = utils.SIGDescribe("NFSPersistentVolumes[Disruptive][Flaky]", func() {
 
 	f := framework.NewDefaultFramework("disruptive-pv")
@@ -60,7 +56,7 @@ var _ = utils.SIGDescribe("NFSPersistentVolumes[Disruptive][Flaky]", func() {
 
 	ginkgo.BeforeEach(func() {
 		// To protect the NFS volume pod from the kubelet restart, we isolate it on its own node.
-		framework.SkipUnlessNodeCountIsAtLeast(MinNodes)
+		framework.SkipUnlessNodeCountIsAtLeast(minNodes)
 		framework.SkipIfProviderIs("local")
 
 		c = f.ClientSet

test/e2e/storage/pd.go

@@ -421,9 +421,8 @@ var _ = utils.SIGDescribe("Pod Disks", func() {
 						err = cs.CoreV1().Pods(ns).Evict(evictTarget)
 						if err != nil {
 							return false, nil
-						} else {
-							return true, nil
 						}
+						return true, nil
 					})
 					framework.ExpectNoError(err, fmt.Sprintf("failed to evict host0Pod after %v", podEvictTimeout))
 				}

test/e2e/storage/persistent_volumes-local.go

@@ -59,27 +59,30 @@ type localTestConfig struct {
 type localVolumeType string
 
 const (
-	// default local volume type, aka a directory
+	// DirectoryLocalVolumeType is the default local volume type, aka a directory
 	DirectoryLocalVolumeType localVolumeType = "dir"
-	// like DirectoryLocalVolumeType but it's a symbolic link to directory
+	// DirectoryLinkLocalVolumeType is like DirectoryLocalVolumeType,
+	// but it's a symbolic link to directory
 	DirectoryLinkLocalVolumeType localVolumeType = "dir-link"
-	// like DirectoryLocalVolumeType but bind mounted
+	// DirectoryBindMountedLocalVolumeType is like DirectoryLocalVolumeType
+	// but bind mounted
 	DirectoryBindMountedLocalVolumeType localVolumeType = "dir-bindmounted"
-	// like DirectoryLocalVolumeType but it's a symbolic link to self bind mounted directory
+	// DirectoryLinkBindMountedLocalVolumeType is like DirectoryLocalVolumeType,
+	// but it's a symbolic link to self bind mounted directory
 	// Note that bind mounting at symbolic link actually mounts at directory it
 	// links to.
 	DirectoryLinkBindMountedLocalVolumeType localVolumeType = "dir-link-bindmounted"
-	// creates a tmpfs and mounts it
+	// TmpfsLocalVolumeType creates a tmpfs and mounts it
 	TmpfsLocalVolumeType localVolumeType = "tmpfs"
-	// tests based on local ssd at /mnt/disks/by-uuid/
+	// GCELocalSSDVolumeType tests based on local ssd at /mnt/disks/by-uuid/
 	GCELocalSSDVolumeType localVolumeType = "gce-localssd-scsi-fs"
-	// Creates a local file, formats it, and maps it as a block device.
+	// BlockLocalVolumeType creates a local file, formats it, and maps it as a block device.
 	BlockLocalVolumeType localVolumeType = "block"
-	// Creates a local file serving as the backing for block device., formats it,
-	// and mounts it to use as FS mode local volume.
+	// BlockFsWithFormatLocalVolumeType creates a local file serving as the backing for block device,
+	// formats it, and mounts it to use as FS mode local volume.
 	BlockFsWithFormatLocalVolumeType localVolumeType = "blockfswithformat"
-	// Creates a local file serving as the backing for block device. do not format it manually,
-	// and mounts it to use as FS mode local volume.
+	// BlockFsWithoutFormatLocalVolumeType creates a local file serving as the backing for block device,
+	// does not format it manually, and mounts it to use as FS mode local volume.
 	BlockFsWithoutFormatLocalVolumeType localVolumeType = "blockfswithoutformat"
 )
 
@@ -1003,21 +1006,19 @@ func createWriteCmd(testDir string, testFile string, writeTestFileContent string
 		// Cleanup the file containing testFileContent.
 		deleteTestFileCmd := fmt.Sprintf("rm %s", testFilePath)
 		return fmt.Sprintf("%s && %s && %s && %s", writeTestFileCmd, sudoCmd, writeBlockCmd, deleteTestFileCmd)
-	} else {
-		testFilePath := filepath.Join(testDir, testFile)
-		return fmt.Sprintf("mkdir -p %s; echo %s > %s", testDir, writeTestFileContent, testFilePath)
 	}
+	testFilePath := filepath.Join(testDir, testFile)
+	return fmt.Sprintf("mkdir -p %s; echo %s > %s", testDir, writeTestFileContent, testFilePath)
 }
 
 func createReadCmd(testFileDir string, testFile string, volumeType localVolumeType) string {
 	if volumeType == BlockLocalVolumeType {
 		// Create the command to read the beginning of the block device and print it in ascii.
 		return fmt.Sprintf("hexdump -n 100 -e '100 \"%%_p\"' %s | head -1", testFileDir)
-	} else {
-		// Create the command to read (aka cat) a file.
-		testFilePath := filepath.Join(testFileDir, testFile)
-		return fmt.Sprintf("cat %s", testFilePath)
 	}
+	// Create the command to read (aka cat) a file.
+	testFilePath := filepath.Join(testFileDir, testFile)
+	return fmt.Sprintf("cat %s", testFilePath)
 }
 
 // Read testFile and evaluate whether it contains the testFileContent

test/e2e/storage/volume_provisioning.go

@@ -847,7 +847,7 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 			framework.SkipIfProviderIs("gke")
 			ginkgo.By("creating a Gluster DP server Pod")
 			pod := startGlusterDpServerPod(c, ns)
-			serverUrl := "http://" + pod.Status.PodIP + ":8081"
+			serverURL := "http://" + pod.Status.PodIP + ":8081"
 			ginkgo.By("creating a StorageClass")
 			test := testsuites.StorageClassTest{
 				Client:       c,
@@ -855,7 +855,7 @@ var _ = utils.SIGDescribe("Dynamic Provisioning", func() {
 				Provisioner:  "kubernetes.io/glusterfs",
 				ClaimSize:    "2Gi",
 				ExpectedSize: "2Gi",
-				Parameters:   map[string]string{"resturl": serverUrl},
+				Parameters:   map[string]string{"resturl": serverURL},
 			}
 			suffix := fmt.Sprintf("glusterdptest")
 			test.Class = newStorageClass(test, ns, suffix)
@@ -1206,9 +1206,8 @@ func waitForProvisionedVolumesDeleted(c clientset.Interface, scName string) ([]*
 		}
 		if len(remainingPVs) > 0 {
 			return false, nil // Poll until no PVs remain
-		} else {
-			return true, nil // No PVs remain
 		}
+		return true, nil // No PVs remain
 	})
 	return remainingPVs, err
 }

test/e2e/storage/volumes.go

@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 // This test is volumes test for configmap.
+
 package storage
 
 import (