fix golint errors in pkg/volume/*

hack/.golint_failures

@@ -403,8 +403,6 @@ pkg/version/verflag
 pkg/volume
 pkg/volume/azure_dd
 pkg/volume/azure_file
-pkg/volume/cephfs
-pkg/volume/configmap
 pkg/volume/csi/fake
 pkg/volume/git_repo
 pkg/volume/host_path
@@ -415,7 +413,6 @@ pkg/volume/photon_pd
 pkg/volume/portworx
 pkg/volume/rbd
 pkg/volume/scaleio
-pkg/volume/secret
 pkg/volume/storageos
 pkg/volume/testing
 pkg/volume/util/fs

pkg/volume/cephfs/cephfs.go

@@ -34,7 +34,7 @@ import (
 	"k8s.io/kubernetes/pkg/volume/util"
 )
 
-// This is the primary entrypoint for volume plugins.
+// ProbeVolumePlugins is the primary entrypoint for volume plugins.
 func ProbeVolumePlugins() []volume.VolumePlugin {
 	return []volume.VolumePlugin{&cephfsPlugin{nil}}
 }
@@ -144,7 +144,7 @@ func (plugin *cephfsPlugin) newMounterInternal(spec *volume.Spec, podUID types.U
 			path:         path,
 			secret:       secret,
 			id:           id,
-			secret_file:  secretFile,
+			secretFile:   secretFile,
 			readonly:     readOnly,
 			mounter:      mounter,
 			plugin:       plugin,
@@ -182,16 +182,16 @@ func (plugin *cephfsPlugin) ConstructVolumeSpec(volumeName, mountPath string) (*
 
 // CephFS volumes represent a bare host file or directory mount of an CephFS export.
 type cephfs struct {
-	volName     string
-	podUID      types.UID
-	mon         []string
-	path        string
-	id          string
-	secret      string
-	secret_file string
-	readonly    bool
-	mounter     mount.Interface
-	plugin      *cephfsPlugin
+	volName    string
+	podUID     types.UID
+	mon        []string
+	path       string
+	id         string
+	secret     string
+	secretFile string
+	readonly   bool
+	mounter    mount.Interface
+	plugin     *cephfsPlugin
 	volume.MetricsNil
 	mountOptions []string
 }
@@ -213,7 +213,7 @@ func (cephfsVolume *cephfsMounter) GetAttributes() volume.Attributes {
 // Checks prior to mount operations to verify that the required components (binaries, etc.)
 // to mount the volume are available on the underlying node.
 // If not, it returns an error
-func (cephfsMounter *cephfsMounter) CanMount() error {
+func (cephfsVolume *cephfsMounter) CanMount() error {
 	return nil
 }
 
@@ -250,10 +250,10 @@ func (cephfsVolume *cephfsMounter) SetUpAt(dir string, fsGroup *int64) error {
 		if err == nil {
 			// cephfs fuse mount succeeded.
 			return nil
-		} else {
-			// if cephfs fuse mount failed, fallback to kernel mount.
-			glog.V(2).Infof("CephFS fuse mount failed: %v, fallback to kernel mount.", err)
 		}
+		// if cephfs fuse mount failed, fallback to kernel mount.
+		glog.V(2).Infof("CephFS fuse mount failed: %v, fallback to kernel mount.", err)
+
 	}
 	glog.V(4).Info("CephFS kernel mount.")
 
@@ -298,19 +298,19 @@ func (cephfsVolume *cephfs) GetKeyringPath() string {
 
 func (cephfsVolume *cephfs) execMount(mountpoint string) error {
 	// cephfs mount option
-	ceph_opt := ""
+	cephOpt := ""
 	// override secretfile if secret is provided
 	if cephfsVolume.secret != "" {
-		ceph_opt = "name=" + cephfsVolume.id + ",secret=" + cephfsVolume.secret
+		cephOpt = "name=" + cephfsVolume.id + ",secret=" + cephfsVolume.secret
 	} else {
-		ceph_opt = "name=" + cephfsVolume.id + ",secretfile=" + cephfsVolume.secret_file
+		cephOpt = "name=" + cephfsVolume.id + ",secretfile=" + cephfsVolume.secretFile
 	}
 	// build option array
 	opt := []string{}
 	if cephfsVolume.readonly {
 		opt = append(opt, "ro")
 	}
-	opt = append(opt, ceph_opt)
+	opt = append(opt, cephOpt)
 
 	// build src like mon1:6789,mon2:6789,mon3:6789:/
 	hosts := cephfsVolume.mon
@@ -331,8 +331,8 @@ func (cephfsVolume *cephfs) execMount(mountpoint string) error {
 	return nil
 }
 
-func (cephfsMounter *cephfsMounter) checkFuseMount() bool {
-	execute := cephfsMounter.plugin.host.GetExec(cephfsMounter.plugin.GetPluginName())
+func (cephfsVolume *cephfsMounter) checkFuseMount() bool {
+	execute := cephfsVolume.plugin.host.GetExec(cephfsVolume.plugin.GetPluginName())
 	switch runtime.GOOS {
 	case "linux":
 		if _, err := execute.Run("/usr/bin/test", "-x", "/sbin/mount.fuse.ceph"); err == nil {
@@ -346,7 +346,7 @@ func (cephfsMounter *cephfsMounter) checkFuseMount() bool {
 
 func (cephfsVolume *cephfs) execFuseMount(mountpoint string) error {
 	// cephfs keyring file
-	keyring_file := ""
+	keyringFile := ""
 	// override secretfile if secret is provided
 	if cephfsVolume.secret != "" {
 		// TODO: cephfs fuse currently doesn't support secret option,
@@ -380,10 +380,10 @@ func (cephfsVolume *cephfs) execFuseMount(mountpoint string) error {
 			return err
 		}
 
-		keyring_file = path.Join(keyringPath, fileName)
+		keyringFile = path.Join(keyringPath, fileName)
 
 	} else {
-		keyring_file = cephfsVolume.secret_file
+		keyringFile = cephfsVolume.secretFile
 	}
 
 	// build src like mon1:6789,mon2:6789,mon3:6789:/
@@ -399,7 +399,7 @@ func (cephfsVolume *cephfs) execFuseMount(mountpoint string) error {
 
 	mountArgs := []string{}
 	mountArgs = append(mountArgs, "-k")
-	mountArgs = append(mountArgs, keyring_file)
+	mountArgs = append(mountArgs, keyringFile)
 	mountArgs = append(mountArgs, "-m")
 	mountArgs = append(mountArgs, src)
 	mountArgs = append(mountArgs, mountpoint)
@@ -423,7 +423,7 @@ func (cephfsVolume *cephfs) execFuseMount(mountpoint string) error {
 	command := exec.Command("ceph-fuse", mountArgs...)
 	output, err := command.CombinedOutput()
 	if err != nil || !(strings.Contains(string(output), "starting fuse")) {
-		return fmt.Errorf("Ceph-fuse failed: %v\narguments: %s\nOutput: %s\n", err, mountArgs, string(output))
+		return fmt.Errorf("Ceph-fuse failed: %v\narguments: %s\nOutput: %s", err, mountArgs, string(output))
 	}
 
 	return nil

pkg/volume/configmap/configmap.go

@@ -30,7 +30,7 @@ import (
 	volumeutil "k8s.io/kubernetes/pkg/volume/util"
 )
 
-// ProbeVolumePlugin is the entry point for plugin detection in a package.
+// ProbeVolumePlugins is the entry point for plugin detection in a package.
 func ProbeVolumePlugins() []volume.VolumePlugin {
 	return []volume.VolumePlugin{&configMapPlugin{}}
 }
@@ -260,7 +260,7 @@ func (b *configMapVolumeMounter) SetUpAt(dir string, fsGroup *int64) error {
 	return nil
 }
 
-// Note: this function is exported so that it can be called from the projection volume driver
+// MakePayload function is exported so that it can be called from the projection volume driver
 func MakePayload(mappings []v1.KeyToPath, configMap *v1.ConfigMap, defaultMode *int32, optional bool) (map[string]volumeutil.FileProjection, error) {
 	if defaultMode == nil {
 		return nil, fmt.Errorf("No defaultMode used, not even the default value for it")

pkg/volume/scaleio/sio_client.go

@@ -74,7 +74,7 @@ type sioClient struct {
 	spClient         *sio.StoragePool
 	provisionMode    string
 	sdcPath          string
-	sdcGuid          string
+	sdcGUID          string
 	instanceID       string
 	inited           bool
 	diskRegex        *regexp.Regexp
@@ -301,11 +301,11 @@ func (c *sioClient) IID() (string, error) {
 
 	// if instanceID not set, retrieve it
 	if c.instanceID == "" {
-		guid, err := c.getGuid()
+		guid, err := c.getGUID()
 		if err != nil {
 			return "", err
 		}
-		sdc, err := c.sysClient.FindSdc("SdcGuid", guid)
+		sdc, err := c.sysClient.FindSdc("SdcGUID", guid)
 		if err != nil {
 			glog.Error(log("failed to retrieve sdc info %s", err))
 			return "", err
@@ -316,10 +316,10 @@ func (c *sioClient) IID() (string, error) {
 	return c.instanceID, nil
 }
 
-// getGuid returns instance GUID, if not set using resource labels
+// getGUID returns instance GUID, if not set using resource labels
 // it attempts to fallback to using drv_cfg binary
-func (c *sioClient) getGuid() (string, error) {
-	if c.sdcGuid == "" {
+func (c *sioClient) getGUID() (string, error) {
+	if c.sdcGUID == "" {
 		glog.V(4).Info(log("sdc guid label not set, falling back to using drv_cfg"))
 		cmd := c.getSdcCmd()
 		output, err := c.exec.Run(cmd, "--query_guid")
@@ -327,9 +327,9 @@ func (c *sioClient) getGuid() (string, error) {
 			glog.Error(log("drv_cfg --query_guid failed: %v", err))
 			return "", err
 		}
-		c.sdcGuid = strings.TrimSpace(string(output))
+		c.sdcGUID = strings.TrimSpace(string(output))
 	}
-	return c.sdcGuid, nil
+	return c.sdcGUID, nil
 }
 
 // getSioDiskPaths traverse local disk devices to retrieve device path
@@ -342,10 +342,10 @@ func (c *sioClient) getSioDiskPaths() ([]os.FileInfo, error) {
 		if os.IsNotExist(err) {
 			// sioDiskIDPath may not exist yet which is fine
 			return []os.FileInfo{}, nil
-		} else {
-			glog.Error(log("failed to ReadDir %s: %v", sioDiskIDPath, err))
-			return nil, err
 		}
+		glog.Error(log("failed to ReadDir %s: %v", sioDiskIDPath, err))
+		return nil, err
+
 	}
 	result := []os.FileInfo{}
 	for _, file := range files {
@@ -360,13 +360,13 @@ func (c *sioClient) getSioDiskPaths() ([]os.FileInfo, error) {
 
 // GetVolumeRefs counts the number of references an SIO volume has a disk device.
 // This is useful in preventing premature detach.
-func (c *sioClient) GetVolumeRefs(volId sioVolumeID) (refs int, err error) {
+func (c *sioClient) GetVolumeRefs(volID sioVolumeID) (refs int, err error) {
 	files, err := c.getSioDiskPaths()
 	if err != nil {
 		return 0, err
 	}
 	for _, file := range files {
-		if strings.Contains(file.Name(), string(volId)) {
+		if strings.Contains(file.Name(), string(volID)) {
 			refs++
 		}
 	}

pkg/volume/scaleio/sio_mgr.go

@@ -81,7 +81,7 @@ func (m *sioMgr) getClient() (sioInterface, error) {
 		client.spName = configs[confKey.storagePool]
 		client.sdcPath = configs[confKey.sdcRootPath]
 		client.provisionMode = configs[confKey.storageMode]
-		client.sdcGuid = configs[confKey.sdcGuid]
+		client.sdcGUID = configs[confKey.sdcGUID]
 
 		m.client = client
 

pkg/volume/scaleio/sio_mgr_test.go

@@ -311,7 +311,7 @@ func (f *fakeSio) Devs() (map[string]string, error) {
 	return f.devs, nil
 }
 
-func (f *fakeSio) GetVolumeRefs(volId sioVolumeID) (int, error) {
+func (f *fakeSio) GetVolumeRefs(volID sioVolumeID) (int, error) {
 	if f.volume == nil {
 		return 0, nil
 	}

pkg/volume/scaleio/sio_plugin.go

@@ -36,6 +36,7 @@ type sioPlugin struct {
 	volumeMtx keymutex.KeyMutex
 }
 
+// ProbeVolumePlugins is the primary entrypoint for volume plugins.
 func ProbeVolumePlugins() []volume.VolumePlugin {
 	p := &sioPlugin{
 		host: nil,

pkg/volume/scaleio/sio_util.go

@@ -54,7 +54,7 @@ var (
 		username,
 		password,
 		secretNamespace,
-		sdcGuid string
+		sdcGUID string
 	}{
 		gateway:          "gateway",
 		sslEnabled:       "sslEnabled",
@@ -71,9 +71,9 @@ var (
 		readOnly:         "readOnly",
 		username:         "username",
 		password:         "password",
-		sdcGuid:          "sdcGuid",
+		sdcGUID:          "sdcGUID",
 	}
-	sdcGuidLabelName = "scaleio.sdcGuid"
+	sdcGUIDLabelName = "scaleio.sdcGUID"
 	sdcRootPath      = "/opt/emc/scaleio/sdc/bin"
 
 	secretNotFoundErr              = errors.New("secret not found")
@@ -232,30 +232,30 @@ func attachSecret(plug *sioPlugin, namespace string, configData map[string]strin
 	return nil
 }
 
-// attachSdcGuid injects the sdc guid node label value into config
-func attachSdcGuid(plug *sioPlugin, conf map[string]string) error {
-	guid, err := getSdcGuidLabel(plug)
+// attachSdcGUID injects the sdc guid node label value into config
+func attachSdcGUID(plug *sioPlugin, conf map[string]string) error {
+	guid, err := getSdcGUIDLabel(plug)
 	if err != nil {
 		return err
 	}
-	conf[confKey.sdcGuid] = guid
+	conf[confKey.sdcGUID] = guid
 	return nil
 }
 
-// getSdcGuidLabel fetches the scaleio.sdcGuid node label
+// getSdcGUIDLabel fetches the scaleio.sdcGuid node label
 // associated with the node executing this code.
-func getSdcGuidLabel(plug *sioPlugin) (string, error) {
+func getSdcGUIDLabel(plug *sioPlugin) (string, error) {
 	nodeLabels, err := plug.host.GetNodeLabels()
 	if err != nil {
 		return "", err
 	}
-	label, ok := nodeLabels[sdcGuidLabelName]
+	label, ok := nodeLabels[sdcGUIDLabelName]
 	if !ok {
-		glog.V(4).Info(log("node label %s not found", sdcGuidLabelName))
+		glog.V(4).Info(log("node label %s not found", sdcGUIDLabelName))
 		return "", nil
 	}
 
-	glog.V(4).Info(log("found node label %s=%s", sdcGuidLabelName, label))
+	glog.V(4).Info(log("found node label %s=%s", sdcGUIDLabelName, label))
 	return label, nil
 }
 

pkg/volume/scaleio/sio_volume.go

@@ -266,7 +266,7 @@ func (v *sioVolume) Provision(selectedNode *api.Node, allowedTopologies []api.To
 	// setup volume attrributes
 	genName := v.generateName("k8svol", 11)
 	var oneGig int64 = 1024 * 1024 * 1024
-	var eightGig int64 = 8 * oneGig
+	eightGig := 8 * oneGig
 
 	capacity := v.options.PVC.Spec.Resources.Requests[api.ResourceName(api.ResourceStorage)]
 	volSizeBytes := capacity.Value()
@@ -393,7 +393,7 @@ func (v *sioVolume) setSioMgr() error {
 		}
 
 		// merge in Sdc Guid label value
-		if err := attachSdcGuid(v.plugin, configData); err != nil {
+		if err := attachSdcGUID(v.plugin, configData); err != nil {
 			glog.Error(log("failed to retrieve sdc guid: %v", err))
 			return err
 		}
@@ -432,7 +432,7 @@ func (v *sioVolume) resetSioMgr() error {
 		}
 
 		// merge in Sdc Guid label value
-		if err := attachSdcGuid(v.plugin, configData); err != nil {
+		if err := attachSdcGUID(v.plugin, configData); err != nil {
 			glog.Error(log("failed to retrieve sdc guid: %v", err))
 			return err
 		}

pkg/volume/scaleio/sio_volume_test.go

@@ -56,7 +56,7 @@ func newPluginMgr(t *testing.T, apiObject runtime.Object) (*volume.VolumePluginM
 		tmpDir,
 		fakeClient,
 		nil,
-		map[string]string{sdcGuidLabelName: "abc-123"},
+		map[string]string{sdcGUIDLabelName: "abc-123"},
 	)
 	plugMgr := &volume.VolumePluginMgr{}
 	plugMgr.InitPlugins(ProbeVolumePlugins(), nil /* prober */, host)
@@ -206,9 +206,9 @@ func TestVolumeMounterUnmounter(t *testing.T) {
 		t.Errorf("SetUp() - expecting multiple volume disabled by default")
 	}
 
-	// did we read sdcGuid label
-	if _, ok := sioVol.sioMgr.configData[confKey.sdcGuid]; !ok {
-		t.Errorf("Expected to find node label scaleio.sdcGuid, but did not find it")
+	// did we read sdcGUID label
+	if _, ok := sioVol.sioMgr.configData[confKey.sdcGUID]; !ok {
+		t.Errorf("Expected to find node label scaleio.sdcGUID, but did not find it")
 	}
 
 	// rebuild spec
@@ -349,9 +349,9 @@ func TestVolumeProvisioner(t *testing.T) {
 		t.Fatalf("Expected success, got: %v", err)
 	}
 
-	// did we read sdcGuid label
-	if _, ok := sioVol.sioMgr.configData[confKey.sdcGuid]; !ok {
-		t.Errorf("Expected to find node label scaleio.sdcGuid, but did not find it")
+	// did we read sdcGUID label
+	if _, ok := sioVol.sioMgr.configData[confKey.sdcGUID]; !ok {
+		t.Errorf("Expected to find node label scaleio.sdcGUID, but did not find it")
 	}
 
 	// isMultiMap applied

pkg/volume/secret/secret.go

@@ -30,7 +30,7 @@ import (
 	volumeutil "k8s.io/kubernetes/pkg/volume/util"
 )
 
-// ProbeVolumePlugin is the entry point for plugin detection in a package.
+// ProbeVolumePlugins is the entry point for plugin detection in a package.
 func ProbeVolumePlugins() []volume.VolumePlugin {
 	return []volume.VolumePlugin{&secretPlugin{}}
 }
@@ -259,7 +259,7 @@ func (b *secretVolumeMounter) SetUpAt(dir string, fsGroup *int64) error {
 	return nil
 }
 
-// Note: this function is exported so that it can be called from the projection volume driver
+// MakePayload function is exported so that it can be called from the projection volume driver
 func MakePayload(mappings []v1.KeyToPath, secret *v1.Secret, defaultMode *int32, optional bool) (map[string]volumeutil.FileProjection, error) {
 	if defaultMode == nil {
 		return nil, fmt.Errorf("No defaultMode used, not even the default value for it")
@@ -281,9 +281,9 @@ func MakePayload(mappings []v1.KeyToPath, secret *v1.Secret, defaultMode *int32,
 				if optional {
 					continue
 				}
-				err_msg := "references non-existent secret key"
-				glog.Errorf(err_msg)
-				return nil, fmt.Errorf(err_msg)
+				errMsg := "references non-existent secret key"
+				glog.Errorf(errMsg)
+				return nil, fmt.Errorf(errMsg)
 			}
 
 			fileProjection.Data = []byte(content)

pkg/volume/storageos/storageos_util_test.go

@@ -30,7 +30,7 @@ import (
 	"testing"
 )
 
-var testApiSecretName = "storageos-api"
+var testAPISecretName = "storageos-api"
 var testVolName = "storageos-test-vol"
 var testPVName = "storageos-test-pv"
 var testNamespace = "storageos-test-namespace"