add azure file CSI translation feature gate

pkg/features/kube_features.go

@@ -423,6 +423,12 @@ const (
 	// Enables the Azure Disk in-tree driver to Azure Disk Driver migration feature.
 	CSIMigrationAzureDisk featuregate.Feature = "CSIMigrationAzureDisk"
 
+	// owner: @andyzhangx
+	// alpha: v1.15
+	//
+	// Enables the Azure File in-tree driver to Azure File Driver migration feature.
+	CSIMigrationAzureFile featuregate.Feature = "CSIMigrationAzureFile"
+
 	// owner: @RobertKrawitz
 	// beta: v1.15
 	//
@@ -503,6 +509,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	CSIMigrationGCE:                             {Default: false, PreRelease: featuregate.Alpha},
 	CSIMigrationAWS:                             {Default: false, PreRelease: featuregate.Alpha},
 	CSIMigrationAzureDisk:                       {Default: false, PreRelease: featuregate.Alpha},
+	CSIMigrationAzureFile:                       {Default: false, PreRelease: featuregate.Alpha},
 	RunAsGroup:                                  {Default: true, PreRelease: featuregate.Beta},
 	CSIMigrationOpenStack:                       {Default: false, PreRelease: featuregate.Alpha},
 	VolumeSubpath:                               {Default: true, PreRelease: featuregate.GA},

pkg/volume/azure_file/BUILD

@@ -16,6 +16,7 @@ go_library(
     ],
     importpath = "k8s.io/kubernetes/pkg/volume/azure_file",
     deps = [
+        "//pkg/features:go_default_library",
         "//pkg/util/mount:go_default_library",
         "//pkg/volume:go_default_library",
         "//pkg/volume/util:go_default_library",
@@ -24,6 +25,7 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/api/resource:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
+        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/cloud-provider:go_default_library",
         "//staging/src/k8s.io/cloud-provider/volume/helpers:go_default_library",
         "//staging/src/k8s.io/legacy-cloud-providers/azure:go_default_library",

pkg/volume/azure_file/azure_file.go

@@ -26,9 +26,11 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	cloudprovider "k8s.io/cloud-provider"
 	volumehelpers "k8s.io/cloud-provider/volume/helpers"
 	"k8s.io/klog"
+	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/util/mount"
 	"k8s.io/kubernetes/pkg/volume"
 	volutil "k8s.io/kubernetes/pkg/volume/util"
@@ -82,7 +84,8 @@ func (plugin *azureFilePlugin) CanSupport(spec *volume.Spec) bool {
 }
 
 func (plugin *azureFilePlugin) IsMigratedToCSI() bool {
-	return false
+	return utilfeature.DefaultFeatureGate.Enabled(features.CSIMigration) &&
+		utilfeature.DefaultFeatureGate.Enabled(features.CSIMigrationAzureFile)
 }
 
 func (plugin *azureFilePlugin) RequiresRemount() bool {

staging/src/k8s.io/csi-translation-lib/translate.go

@@ -31,6 +31,7 @@ var (
 		plugins.AWSEBSDriverName:    plugins.NewAWSElasticBlockStoreCSITranslator(),
 		plugins.CinderDriverName:    plugins.NewOpenStackCinderCSITranslator(),
 		plugins.AzureDiskDriverName: plugins.NewAzureDiskCSITranslator(),
+		plugins.AzureFileDriverName: plugins.NewAzureFileCSITranslator(),
 	}
 )