remove ExpandPersistentVolume feature gate

cmd/kube-controller-manager/app/core.go

@@ -65,7 +65,6 @@ import (
 	persistentvolumecontroller "k8s.io/kubernetes/pkg/controller/volume/persistentvolume"
 	"k8s.io/kubernetes/pkg/controller/volume/pvcprotection"
 	"k8s.io/kubernetes/pkg/controller/volume/pvprotection"
-	"k8s.io/kubernetes/pkg/features"
 	quotainstall "k8s.io/kubernetes/pkg/quota/v1/install"
 	"k8s.io/kubernetes/pkg/volume/csimigration"
 	netutils "k8s.io/utils/net"
@@ -336,36 +335,34 @@ func startAttachDetachController(ctx context.Context, controllerContext Controll
 }
 
 func startVolumeExpandController(ctx context.Context, controllerContext ControllerContext) (controller.Interface, bool, error) {
-	if utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) {
-		plugins, err := ProbeExpandableVolumePlugins(controllerContext.ComponentConfig.PersistentVolumeBinderController.VolumeConfiguration)
-		if err != nil {
-			return nil, true, fmt.Errorf("failed to probe volume plugins when starting volume expand controller: %v", err)
-		}
-		csiTranslator := csitrans.New()
-		filteredDialOptions, err := options.ParseVolumeHostFilters(
-			controllerContext.ComponentConfig.PersistentVolumeBinderController.VolumeHostCIDRDenylist,
-			controllerContext.ComponentConfig.PersistentVolumeBinderController.VolumeHostAllowLocalLoopback)
-		if err != nil {
-			return nil, true, err
-		}
-		expandController, expandControllerErr := expand.NewExpandController(
-			controllerContext.ClientBuilder.ClientOrDie("expand-controller"),
-			controllerContext.InformerFactory.Core().V1().PersistentVolumeClaims(),
-			controllerContext.InformerFactory.Core().V1().PersistentVolumes(),
-			controllerContext.Cloud,
-			plugins,
-			csiTranslator,
-			csimigration.NewPluginManager(csiTranslator, utilfeature.DefaultFeatureGate),
-			filteredDialOptions,
-		)
-
-		if expandControllerErr != nil {
-			return nil, true, fmt.Errorf("failed to start volume expand controller: %v", expandControllerErr)
-		}
-		go expandController.Run(ctx)
-		return nil, true, nil
+	plugins, err := ProbeExpandableVolumePlugins(controllerContext.ComponentConfig.PersistentVolumeBinderController.VolumeConfiguration)
+	if err != nil {
+		return nil, true, fmt.Errorf("failed to probe volume plugins when starting volume expand controller: %v", err)
 	}
-	return nil, false, nil
+	csiTranslator := csitrans.New()
+	filteredDialOptions, err := options.ParseVolumeHostFilters(
+		controllerContext.ComponentConfig.PersistentVolumeBinderController.VolumeHostCIDRDenylist,
+		controllerContext.ComponentConfig.PersistentVolumeBinderController.VolumeHostAllowLocalLoopback)
+	if err != nil {
+		return nil, true, err
+	}
+	expandController, expandControllerErr := expand.NewExpandController(
+		controllerContext.ClientBuilder.ClientOrDie("expand-controller"),
+		controllerContext.InformerFactory.Core().V1().PersistentVolumeClaims(),
+		controllerContext.InformerFactory.Core().V1().PersistentVolumes(),
+		controllerContext.Cloud,
+		plugins,
+		csiTranslator,
+		csimigration.NewPluginManager(csiTranslator, utilfeature.DefaultFeatureGate),
+		filteredDialOptions,
+	)
+
+	if expandControllerErr != nil {
+		return nil, true, fmt.Errorf("failed to start volume expand controller: %v", expandControllerErr)
+	}
+	go expandController.Run(ctx)
+	return nil, true, nil
+
 }
 
 func startEphemeralVolumeController(ctx context.Context, controllerContext ControllerContext) (controller.Interface, bool, error) {

pkg/api/persistentvolumeclaim/util.go

@@ -75,10 +75,6 @@ func EnforceDataSourceBackwardsCompatibility(pvcSpec, oldPVCSpec *core.Persisten
 }
 
 func DropDisabledFieldsFromStatus(pvc, oldPVC *core.PersistentVolumeClaim) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) && oldPVC.Status.Conditions == nil {
-		pvc.Status.Conditions = nil
-	}
-
 	if !utilfeature.DefaultFeatureGate.Enabled(features.RecoverVolumeExpansionFailure) {
 		if !allocatedResourcesInUse(oldPVC) {
 			pvc.Status.AllocatedResources = nil

pkg/apis/core/validation/validation.go

@@ -2022,8 +2022,6 @@ func ValidatePersistentVolumeStatusUpdate(newPv, oldPv *core.PersistentVolume) f
 type PersistentVolumeClaimSpecValidationOptions struct {
 	// Allow spec to contain the "ReadWiteOncePod" access mode
 	AllowReadWriteOncePod bool
-	// Allow pvc expansion after PVC is created and bound to a PV
-	EnableExpansion bool
 	// Allow users to recover from previously failing expansion operation
 	EnableRecoverFromExpansionFailure bool
 }
@@ -2031,7 +2029,6 @@ type PersistentVolumeClaimSpecValidationOptions struct {
 func ValidationOptionsForPersistentVolumeClaim(pvc, oldPvc *core.PersistentVolumeClaim) PersistentVolumeClaimSpecValidationOptions {
 	opts := PersistentVolumeClaimSpecValidationOptions{
 		AllowReadWriteOncePod:             utilfeature.DefaultFeatureGate.Enabled(features.ReadWriteOncePod),
-		EnableExpansion:                   utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes),
 		EnableRecoverFromExpansionFailure: utilfeature.DefaultFeatureGate.Enabled(features.RecoverVolumeExpansionFailure),
 	}
 	if oldPvc == nil {
@@ -2178,40 +2175,30 @@ func ValidatePersistentVolumeClaimUpdate(newPvc, oldPvc *core.PersistentVolumeCl
 		allErrs = append(allErrs, ValidateImmutableAnnotation(newPvc.ObjectMeta.Annotations[v1.BetaStorageClassAnnotation], oldPvc.ObjectMeta.Annotations[v1.BetaStorageClassAnnotation], v1.BetaStorageClassAnnotation, field.NewPath("metadata"))...)
 	}
 
-	if opts.EnableExpansion {
-		// lets make sure storage values are same.
-		if newPvc.Status.Phase == core.ClaimBound && newPvcClone.Spec.Resources.Requests != nil {
-			newPvcClone.Spec.Resources.Requests["storage"] = oldPvc.Spec.Resources.Requests["storage"] // +k8s:verify-mutation:reason=clone
-		}
+	// lets make sure storage values are same.
+	if newPvc.Status.Phase == core.ClaimBound && newPvcClone.Spec.Resources.Requests != nil {
+		newPvcClone.Spec.Resources.Requests["storage"] = oldPvc.Spec.Resources.Requests["storage"] // +k8s:verify-mutation:reason=clone
+	}
 
-		oldSize := oldPvc.Spec.Resources.Requests["storage"]
-		newSize := newPvc.Spec.Resources.Requests["storage"]
-		statusSize := oldPvc.Status.Capacity["storage"]
+	oldSize := oldPvc.Spec.Resources.Requests["storage"]
+	newSize := newPvc.Spec.Resources.Requests["storage"]
+	statusSize := oldPvc.Status.Capacity["storage"]
 
-		if !apiequality.Semantic.DeepEqual(newPvcClone.Spec, oldPvcClone.Spec) {
-			specDiff := cmp.Diff(oldPvcClone.Spec, newPvcClone.Spec)
-			allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), fmt.Sprintf("spec is immutable after creation except resources.requests for bound claims\n%v", specDiff)))
-		}
-		if newSize.Cmp(oldSize) < 0 {
-			if !opts.EnableRecoverFromExpansionFailure {
-				allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "resources", "requests", "storage"), "field can not be less than previous value"))
-			} else {
-				// This validation permits reducing pvc requested size up to capacity recorded in pvc.status
-				// so that users can recover from volume expansion failure, but Kubernetes does not actually
-				// support volume shrinking
-				if newSize.Cmp(statusSize) <= 0 {
-					allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "resources", "requests", "storage"), "field can not be less than status.capacity"))
-				}
+	if !apiequality.Semantic.DeepEqual(newPvcClone.Spec, oldPvcClone.Spec) {
+		specDiff := cmp.Diff(oldPvcClone.Spec, newPvcClone.Spec)
+		allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), fmt.Sprintf("spec is immutable after creation except resources.requests for bound claims\n%v", specDiff)))
+	}
+	if newSize.Cmp(oldSize) < 0 {
+		if !opts.EnableRecoverFromExpansionFailure {
+			allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "resources", "requests", "storage"), "field can not be less than previous value"))
+		} else {
+			// This validation permits reducing pvc requested size up to capacity recorded in pvc.status
+			// so that users can recover from volume expansion failure, but Kubernetes does not actually
+			// support volume shrinking
+			if newSize.Cmp(statusSize) <= 0 {
+				allErrs = append(allErrs, field.Forbidden(field.NewPath("spec", "resources", "requests", "storage"), "field can not be less than status.capacity"))
 			}
 		}
-
-	} else {
-		// changes to Spec are not allowed, but updates to label/and some annotations are OK.
-		// no-op updates pass validation.
-		if !apiequality.Semantic.DeepEqual(newPvcClone.Spec, oldPvcClone.Spec) {
-			specDiff := cmp.Diff(oldPvcClone.Spec, newPvcClone.Spec)
-			allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), fmt.Sprintf("field is immutable after creation\n%v", specDiff)))
-		}
 	}
 
 	allErrs = append(allErrs, ValidateImmutableField(newPvc.Spec.VolumeMode, oldPvc.Spec.VolumeMode, field.NewPath("volumeMode"))...)

pkg/apis/core/validation/validation_test.go

@@ -2108,215 +2108,173 @@ func TestValidatePersistentVolumeClaimUpdate(t *testing.T) {
 		isExpectedFailure          bool
 		oldClaim                   *core.PersistentVolumeClaim
 		newClaim                   *core.PersistentVolumeClaim
-		enableResize               bool
 		enableRecoverFromExpansion bool
 	}{
 		"valid-update-volumeName-only": {
 			isExpectedFailure: false,
 			oldClaim:          validClaim,
 			newClaim:          validUpdateClaim,
-			enableResize:      false,
 		},
 		"valid-no-op-update": {
 			isExpectedFailure: false,
 			oldClaim:          validUpdateClaim,
 			newClaim:          validUpdateClaim,
-			enableResize:      false,
 		},
 		"invalid-update-change-resources-on-bound-claim": {
 			isExpectedFailure: true,
 			oldClaim:          validUpdateClaim,
 			newClaim:          invalidUpdateClaimResources,
-			enableResize:      false,
 		},
 		"invalid-update-change-access-modes-on-bound-claim": {
 			isExpectedFailure: true,
 			oldClaim:          validUpdateClaim,
 			newClaim:          invalidUpdateClaimAccessModes,
-			enableResize:      false,
 		},
 		"valid-update-volume-mode-block-to-block": {
 			isExpectedFailure: false,
 			oldClaim:          validClaimVolumeModeBlock,
 			newClaim:          validClaimVolumeModeBlock,
-			enableResize:      false,
 		},
 		"valid-update-volume-mode-file-to-file": {
 			isExpectedFailure: false,
 			oldClaim:          validClaimVolumeModeFile,
 			newClaim:          validClaimVolumeModeFile,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-to-block": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimVolumeModeFile,
 			newClaim:          validClaimVolumeModeBlock,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-to-file": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimVolumeModeBlock,
 			newClaim:          validClaimVolumeModeFile,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-nil-to-file": {
 			isExpectedFailure: true,
 			oldClaim:          invalidClaimVolumeModeNil,
 			newClaim:          validClaimVolumeModeFile,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-nil-to-block": {
 			isExpectedFailure: true,
 			oldClaim:          invalidClaimVolumeModeNil,
 			newClaim:          validClaimVolumeModeBlock,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-block-to-nil": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimVolumeModeBlock,
 			newClaim:          invalidClaimVolumeModeNil,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-file-to-nil": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimVolumeModeFile,
 			newClaim:          invalidClaimVolumeModeNil,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-empty-to-mode": {
 			isExpectedFailure: true,
 			oldClaim:          validClaim,
 			newClaim:          validClaimVolumeModeBlock,
-			enableResize:      false,
 		},
 		"invalid-update-volume-mode-mode-to-empty": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimVolumeModeBlock,
 			newClaim:          validClaim,
-			enableResize:      false,
 		},
 		"invalid-update-change-storage-class-annotation-after-creation": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimStorageClass,
 			newClaim:          invalidUpdateClaimStorageClass,
-			enableResize:      false,
 		},
 		"valid-update-mutable-annotation": {
 			isExpectedFailure: false,
 			oldClaim:          validClaimAnnotation,
 			newClaim:          validUpdateClaimMutableAnnotation,
-			enableResize:      false,
 		},
 		"valid-update-add-annotation": {
 			isExpectedFailure: false,
 			oldClaim:          validClaim,
 			newClaim:          validAddClaimAnnotation,
-			enableResize:      false,
 		},
 		"valid-size-update-resize-disabled": {
-			isExpectedFailure: true,
-			oldClaim:          validClaim,
-			newClaim:          validSizeUpdate,
-			enableResize:      false,
+			oldClaim: validClaim,
+			newClaim: validSizeUpdate,
 		},
 		"valid-size-update-resize-enabled": {
 			isExpectedFailure: false,
 			oldClaim:          validClaim,
 			newClaim:          validSizeUpdate,
-			enableResize:      true,
 		},
 		"invalid-size-update-resize-enabled": {
 			isExpectedFailure: true,
 			oldClaim:          validClaim,
 			newClaim:          invalidSizeUpdate,
-			enableResize:      true,
 		},
 		"unbound-size-update-resize-enabled": {
 			isExpectedFailure: true,
 			oldClaim:          validClaim,
 			newClaim:          unboundSizeUpdate,
-			enableResize:      true,
 		},
 		"valid-upgrade-storage-class-annotation-to-spec": {
 			isExpectedFailure: false,
 			oldClaim:          validClaimStorageClass,
 			newClaim:          validClaimStorageClassInSpec,
-			enableResize:      false,
 		},
 		"invalid-upgrade-storage-class-annotation-to-spec": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimStorageClass,
 			newClaim:          invalidClaimStorageClassInSpec,
-			enableResize:      false,
 		},
 		"valid-upgrade-storage-class-annotation-to-annotation-and-spec": {
 			isExpectedFailure: false,
 			oldClaim:          validClaimStorageClass,
 			newClaim:          validClaimStorageClassInAnnotationAndSpec,
-			enableResize:      false,
 		},
 		"invalid-upgrade-storage-class-annotation-to-annotation-and-spec": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimStorageClass,
 			newClaim:          invalidClaimStorageClassInAnnotationAndSpec,
-			enableResize:      false,
 		},
 		"invalid-upgrade-storage-class-in-spec": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimStorageClassInSpec,
 			newClaim:          invalidClaimStorageClassInSpec,
-			enableResize:      false,
 		},
 		"invalid-downgrade-storage-class-spec-to-annotation": {
 			isExpectedFailure: true,
 			oldClaim:          validClaimStorageClassInSpec,
 			newClaim:          validClaimStorageClass,
-			enableResize:      false,
 		},
 		"valid-update-rwop-used-and-rwop-feature-disabled": {
 			isExpectedFailure: false,
 			oldClaim:          validClaimRWOPAccessMode,
 			newClaim:          validClaimRWOPAccessModeAddAnnotation,
-			enableResize:      false,
 		},
 		"valid-expand-shrink-resize-enabled": {
 			oldClaim:                   validClaimShrinkInitial,
 			newClaim:                   validClaimShrink,
-			enableResize:               true,
 			enableRecoverFromExpansion: true,
 		},
 		"invalid-expand-shrink-resize-enabled": {
 			oldClaim:                   validClaimShrinkInitial,
 			newClaim:                   invalidClaimShrink,
-			enableResize:               true,
 			enableRecoverFromExpansion: true,
 			isExpectedFailure:          true,
 		},
 		"invalid-expand-shrink-to-status-resize-enabled": {
 			oldClaim:                   validClaimShrinkInitial,
 			newClaim:                   invalidShrinkToStatus,
-			enableResize:               true,
 			enableRecoverFromExpansion: true,
 			isExpectedFailure:          true,
 		},
 		"invalid-expand-shrink-recover-disabled": {
 			oldClaim:                   validClaimShrinkInitial,
 			newClaim:                   validClaimShrink,
-			enableResize:               true,
 			enableRecoverFromExpansion: false,
 			isExpectedFailure:          true,
 		},
-		"invalid-expand-shrink-resize-disabled": {
-			oldClaim:                   validClaimShrinkInitial,
-			newClaim:                   validClaimShrink,
-			enableResize:               false,
-			enableRecoverFromExpansion: true,
-			isExpectedFailure:          true,
-		},
 		"unbound-size-shrink-resize-enabled": {
 			oldClaim:                   validClaimShrinkInitial,
 			newClaim:                   unboundShrink,
-			enableResize:               true,
 			enableRecoverFromExpansion: true,
 			isExpectedFailure:          true,
 		},
@@ -2324,7 +2282,6 @@ func TestValidatePersistentVolumeClaimUpdate(t *testing.T) {
 
 	for name, scenario := range scenarios {
 		t.Run(name, func(t *testing.T) {
-			defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExpandPersistentVolumes, scenario.enableResize)()
 			defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.RecoverVolumeExpansionFailure, scenario.enableRecoverFromExpansion)()
 			scenario.oldClaim.ResourceVersion = "1"
 			scenario.newClaim.ResourceVersion = "1"
@@ -2351,7 +2308,6 @@ func TestValidationOptionsForPersistentVolumeClaim(t *testing.T) {
 			enableReadWriteOncePod: true,
 			expectValidationOpts: PersistentVolumeClaimSpecValidationOptions{
 				AllowReadWriteOncePod:             true,
-				EnableExpansion:                   true,
 				EnableRecoverFromExpansionFailure: false,
 			},
 		},
@@ -2360,7 +2316,6 @@ func TestValidationOptionsForPersistentVolumeClaim(t *testing.T) {
 			enableReadWriteOncePod: true,
 			expectValidationOpts: PersistentVolumeClaimSpecValidationOptions{
 				AllowReadWriteOncePod:             true,
-				EnableExpansion:                   true,
 				EnableRecoverFromExpansionFailure: false,
 			},
 		},
@@ -2369,7 +2324,6 @@ func TestValidationOptionsForPersistentVolumeClaim(t *testing.T) {
 			enableReadWriteOncePod: false,
 			expectValidationOpts: PersistentVolumeClaimSpecValidationOptions{
 				AllowReadWriteOncePod:             false,
-				EnableExpansion:                   true,
 				EnableRecoverFromExpansionFailure: false,
 			},
 		},
@@ -2378,7 +2332,6 @@ func TestValidationOptionsForPersistentVolumeClaim(t *testing.T) {
 			enableReadWriteOncePod: true,
 			expectValidationOpts: PersistentVolumeClaimSpecValidationOptions{
 				AllowReadWriteOncePod:             true,
-				EnableExpansion:                   true,
 				EnableRecoverFromExpansionFailure: false,
 			},
 		},
@@ -2387,7 +2340,6 @@ func TestValidationOptionsForPersistentVolumeClaim(t *testing.T) {
 			enableReadWriteOncePod: false,
 			expectValidationOpts: PersistentVolumeClaimSpecValidationOptions{
 				AllowReadWriteOncePod:             true,
-				EnableExpansion:                   true,
 				EnableRecoverFromExpansionFailure: false,
 			},
 		},

pkg/apis/storage/util/util.go

@@ -1,40 +0,0 @@
-/*
-Copyright 2017 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package util
-
-import (
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	"k8s.io/kubernetes/pkg/apis/storage"
-	"k8s.io/kubernetes/pkg/features"
-)
-
-// DropDisabledFields removes disabled fields from the StorageClass object.
-func DropDisabledFields(class, oldClass *storage.StorageClass) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) && !allowVolumeExpansionInUse(oldClass) {
-		class.AllowVolumeExpansion = nil
-	}
-}
-
-func allowVolumeExpansionInUse(oldClass *storage.StorageClass) bool {
-	if oldClass == nil {
-		return false
-	}
-	if oldClass.AllowVolumeExpansion != nil {
-		return true
-	}
-	return false
-}

pkg/apis/storage/util/util_test.go

@@ -1,108 +0,0 @@
-/*
-Copyright 2017 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package util
-
-import (
-	"fmt"
-	"reflect"
-	"testing"
-
-	"k8s.io/apimachinery/pkg/util/diff"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
-	"k8s.io/kubernetes/pkg/apis/storage"
-	"k8s.io/kubernetes/pkg/features"
-)
-
-func TestDropAllowVolumeExpansion(t *testing.T) {
-	allowVolumeExpansion := false
-	scWithoutAllowVolumeExpansion := func() *storage.StorageClass {
-		return &storage.StorageClass{}
-	}
-	scWithAllowVolumeExpansion := func() *storage.StorageClass {
-		return &storage.StorageClass{
-			AllowVolumeExpansion: &allowVolumeExpansion,
-		}
-	}
-
-	scInfo := []struct {
-		description             string
-		hasAllowVolumeExpansion bool
-		sc                      func() *storage.StorageClass
-	}{
-		{
-			description:             "StorageClass Without AllowVolumeExpansion",
-			hasAllowVolumeExpansion: false,
-			sc:                      scWithoutAllowVolumeExpansion,
-		},
-		{
-			description:             "StorageClass With AllowVolumeExpansion",
-			hasAllowVolumeExpansion: true,
-			sc:                      scWithAllowVolumeExpansion,
-		},
-		{
-			description:             "is nil",
-			hasAllowVolumeExpansion: false,
-			sc:                      func() *storage.StorageClass { return nil },
-		},
-	}
-
-	for _, enabled := range []bool{true, false} {
-		for _, oldStorageClassInfo := range scInfo {
-			for _, newStorageClassInfo := range scInfo {
-				oldStorageClassHasAllowVolumeExpansion, oldStorageClass := oldStorageClassInfo.hasAllowVolumeExpansion, oldStorageClassInfo.sc()
-				newStorageClassHasAllowVolumeExpansion, newStorageClass := newStorageClassInfo.hasAllowVolumeExpansion, newStorageClassInfo.sc()
-				if newStorageClass == nil {
-					continue
-				}
-
-				t.Run(fmt.Sprintf("feature enabled=%v, old StorageClass %v, new StorageClass %v", enabled, oldStorageClassInfo.description, newStorageClassInfo.description), func(t *testing.T) {
-					defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExpandPersistentVolumes, enabled)()
-
-					DropDisabledFields(newStorageClass, oldStorageClass)
-
-					// old StorageClass should never be changed
-					if !reflect.DeepEqual(oldStorageClass, oldStorageClassInfo.sc()) {
-						t.Errorf("old StorageClass changed: %v", diff.ObjectReflectDiff(oldStorageClass, oldStorageClassInfo.sc()))
-					}
-
-					switch {
-					case enabled || oldStorageClassHasAllowVolumeExpansion:
-						// new StorageClass should not be changed if the feature is enabled, or if the old StorageClass had AllowVolumeExpansion
-						if !reflect.DeepEqual(newStorageClass, newStorageClassInfo.sc()) {
-							t.Errorf("new StorageClass changed: %v", diff.ObjectReflectDiff(newStorageClass, newStorageClassInfo.sc()))
-						}
-					case newStorageClassHasAllowVolumeExpansion:
-						// new StorageClass should be changed
-						if reflect.DeepEqual(newStorageClass, newStorageClassInfo.sc()) {
-							t.Errorf("new StorageClass was not changed")
-						}
-						// new StorageClass should not have AllowVolumeExpansion
-						if !reflect.DeepEqual(newStorageClass, scWithoutAllowVolumeExpansion()) {
-							t.Errorf("new StorageClass had StorageClassAllowVolumeExpansion: %v", diff.ObjectReflectDiff(newStorageClass, scWithoutAllowVolumeExpansion()))
-						}
-					default:
-						// new StorageClass should not need to be changed
-						if !reflect.DeepEqual(newStorageClass, newStorageClassInfo.sc()) {
-							t.Errorf("new StorageClass changed: %v", diff.ObjectReflectDiff(newStorageClass, newStorageClassInfo.sc()))
-						}
-					}
-				})
-			}
-		}
-	}
-}

pkg/quota/v1/evaluator/core/persistent_volume_claims.go

@@ -94,7 +94,7 @@ func (p *pvcEvaluator) Handles(a admission.Attributes) bool {
 	if op == admission.Create {
 		return true
 	}
-	if op == admission.Update && utilfeature.DefaultFeatureGate.Enabled(k8sfeatures.ExpandPersistentVolumes) {
+	if op == admission.Update {
 		return true
 	}
 	return false

pkg/registry/core/persistentvolumeclaim/strategy_test.go

@@ -76,15 +76,13 @@ func TestDropConditions(t *testing.T) {
 		},
 	}
 
-	for _, enabled := range []bool{true, false} {
+	for _, enabled := range []bool{true} {
 		for _, oldPvcInfo := range pvcInfo {
 			for _, newPvcInfo := range pvcInfo {
 				oldPvcHasConditins, oldPvc := oldPvcInfo.hasConditions, oldPvcInfo.pvc()
 				newPvcHasConditions, newPvc := newPvcInfo.hasConditions, newPvcInfo.pvc()
 
 				t.Run(fmt.Sprintf("feature enabled=%v, old pvc %v, new pvc %v", enabled, oldPvcInfo.description, newPvcInfo.description), func(t *testing.T) {
-					defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExpandPersistentVolumes, enabled)()
-
 					StatusStrategy.PrepareForUpdate(ctx, newPvc, oldPvc)
 
 					// old pvc should never be changed

pkg/registry/storage/storageclass/strategy.go

@@ -24,7 +24,6 @@ import (
 	"k8s.io/apiserver/pkg/storage/names"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	"k8s.io/kubernetes/pkg/apis/storage"
-	storageutil "k8s.io/kubernetes/pkg/apis/storage/util"
 	"k8s.io/kubernetes/pkg/apis/storage/validation"
 )
 
@@ -44,9 +43,6 @@ func (storageClassStrategy) NamespaceScoped() bool {
 
 // ResetBeforeCreate clears the Status field which is not allowed to be set by end users on creation.
 func (storageClassStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
-	class := obj.(*storage.StorageClass)
-
-	storageutil.DropDisabledFields(class, nil)
 }
 
 func (storageClassStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
@@ -69,10 +65,6 @@ func (storageClassStrategy) AllowCreateOnUpdate() bool {
 
 // PrepareForUpdate sets the Status fields which is not allowed to be set by an end user updating a PV
 func (storageClassStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
-	newClass := obj.(*storage.StorageClass)
-	oldClass := old.(*storage.StorageClass)
-
-	storageutil.DropDisabledFields(oldClass, newClass)
 }
 
 func (storageClassStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {

pkg/volume/util/operationexecutor/operation_generator.go

@@ -2025,10 +2025,6 @@ func (og *operationGenerator) nodeExpandVolume(
 	volumeToMount VolumeToMount,
 	actualStateOfWorld ActualStateOfWorldMounterUpdater,
 	rsOpts volume.NodeResizeOptions) (bool, error) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) {
-		klog.V(4).Infof("Resizing is not enabled for this volume %s", volumeToMount.VolumeName)
-		return true, nil
-	}
 
 	if volumeToMount.VolumeSpec != nil &&
 		volumeToMount.VolumeSpec.InlineVolumeSpecForCSIMigration {

plugin/pkg/admission/noderestriction/admission.go

@@ -71,8 +71,7 @@ type Plugin struct {
 	podsGetter     corev1lister.PodLister
 	nodesGetter    corev1lister.NodeLister
 
-	expandPersistentVolumesEnabled bool
-	expansionRecoveryEnabled       bool
+	expansionRecoveryEnabled bool
 }
 
 var (
@@ -83,7 +82,6 @@ var (
 
 // InspectFeatureGates allows setting bools without taking a dep on a global variable
 func (p *Plugin) InspectFeatureGates(featureGates featuregate.FeatureGate) {
-	p.expandPersistentVolumesEnabled = featureGates.Enabled(features.ExpandPersistentVolumes)
 	p.expansionRecoveryEnabled = featureGates.Enabled(features.RecoverVolumeExpansionFailure)
 }
 
@@ -336,10 +334,6 @@ func (p *Plugin) admitPodEviction(nodeName string, a admission.Attributes) error
 func (p *Plugin) admitPVCStatus(nodeName string, a admission.Attributes) error {
 	switch a.GetOperation() {
 	case admission.Update:
-		if !p.expandPersistentVolumesEnabled {
-			return admission.NewForbidden(a, fmt.Errorf("node %q is not allowed to update persistentvolumeclaim metadata", nodeName))
-		}
-
 		oldPVC, ok := a.GetOldObject().(*api.PersistentVolumeClaim)
 		if !ok {
 			return admission.NewForbidden(a, fmt.Errorf("unexpected type %T", a.GetOldObject()))

plugin/pkg/admission/noderestriction/admission_test.go

@@ -18,14 +18,15 @@ package noderestriction
 
 import (
 	"context"
-	"k8s.io/apiserver/pkg/util/feature"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
-	"k8s.io/kubernetes/pkg/features"
 	"reflect"
 	"strings"
 	"testing"
 	"time"
 
+	"k8s.io/apiserver/pkg/util/feature"
+	featuregatetesting "k8s.io/component-base/featuregate/testing"
+	"k8s.io/kubernetes/pkg/features"
+
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -1527,8 +1528,6 @@ func TestAdmitPVCStatus(t *testing.T) {
 			attributes := admission.NewAttributesRecord(
 				test.newObj, test.oldObj, schema.GroupVersionKind{},
 				metav1.NamespaceDefault, "foo", apiResource, test.subresource, operation, &metav1.CreateOptions{}, false, mynode)
-
-			defer featuregatetesting.SetFeatureGateDuringTest(t, feature.DefaultFeatureGate, features.ExpandPersistentVolumes, test.expansionFeatureEnabled)()
 			defer featuregatetesting.SetFeatureGateDuringTest(t, feature.DefaultFeatureGate, features.RecoverVolumeExpansionFailure, test.recoveryFeatureEnabled)()
 			a := &admitTestCase{
 				name:        test.name,

plugin/pkg/admission/resourcequota/admission_test.go

@@ -30,15 +30,12 @@ import (
 	"k8s.io/apiserver/pkg/admission"
 	"k8s.io/apiserver/pkg/admission/plugin/resourcequota"
 	resourcequotaapi "k8s.io/apiserver/pkg/admission/plugin/resourcequota/apis/resourcequota"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/kubernetes/fake"
 	testcore "k8s.io/client-go/testing"
 	"k8s.io/client-go/tools/cache"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
 	api "k8s.io/kubernetes/pkg/apis/core"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/quota/v1/install"
 )
 
@@ -408,8 +405,6 @@ func TestAdmitHandlesNegativePVCUpdates(t *testing.T) {
 	stopCh := make(chan struct{})
 	defer close(stopCh)
 
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExpandPersistentVolumes, true)()
-
 	kubeClient := fake.NewSimpleClientset(resourceQuota)
 	informerFactory := informers.NewSharedInformerFactory(kubeClient, 0)
 
@@ -458,8 +453,6 @@ func TestAdmitHandlesPVCUpdates(t *testing.T) {
 		},
 	}
 
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExpandPersistentVolumes, true)()
-
 	// start up quota system
 	stopCh := make(chan struct{})
 	defer close(stopCh)

plugin/pkg/auth/authorizer/node/node_authorizer.go

@@ -32,7 +32,6 @@ import (
 	api "k8s.io/kubernetes/pkg/apis/core"
 	storageapi "k8s.io/kubernetes/pkg/apis/storage"
 	"k8s.io/kubernetes/pkg/auth/nodeidentifier"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/plugin/pkg/auth/authorizer/rbac"
 	"k8s.io/kubernetes/third_party/forked/gonum/graph"
 	"k8s.io/kubernetes/third_party/forked/gonum/graph/traverse"
@@ -112,10 +111,8 @@ func (r *NodeAuthorizer) Authorize(ctx context.Context, attrs authorizer.Attribu
 		case configMapResource:
 			return r.authorizeReadNamespacedObject(nodeName, configMapVertexType, attrs)
 		case pvcResource:
-			if r.features.Enabled(features.ExpandPersistentVolumes) {
-				if attrs.GetSubresource() == "status" {
-					return r.authorizeStatusUpdate(nodeName, pvcVertexType, attrs)
-				}
+			if attrs.GetSubresource() == "status" {
+				return r.authorizeStatusUpdate(nodeName, pvcVertexType, attrs)
 			}
 			return r.authorizeGet(nodeName, pvcVertexType, attrs)
 		case pvResource:

plugin/pkg/auth/authorizer/rbac/bootstrappolicy/controller_policy.go

@@ -177,21 +177,19 @@ func buildControllerRoles() ([]rbacv1.ClusterRole, []rbacv1.ClusterRoleBinding)
 		},
 	})
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) {
-		addControllerRole(&controllerRoles, &controllerRoleBindings, rbacv1.ClusterRole{
-			ObjectMeta: metav1.ObjectMeta{Name: saRolePrefix + "expand-controller"},
-			Rules: []rbacv1.PolicyRule{
-				rbacv1helpers.NewRule("get", "list", "watch", "update", "patch").Groups(legacyGroup).Resources("persistentvolumes").RuleOrDie(),
-				rbacv1helpers.NewRule("update", "patch").Groups(legacyGroup).Resources("persistentvolumeclaims/status").RuleOrDie(),
-				rbacv1helpers.NewRule("get", "list", "watch").Groups(legacyGroup).Resources("persistentvolumeclaims").RuleOrDie(),
-				// glusterfs
-				rbacv1helpers.NewRule("get", "list", "watch").Groups(storageGroup).Resources("storageclasses").RuleOrDie(),
-				rbacv1helpers.NewRule("get").Groups(legacyGroup).Resources("services", "endpoints").RuleOrDie(),
-				rbacv1helpers.NewRule("get").Groups(legacyGroup).Resources("secrets").RuleOrDie(),
-				eventsRule(),
-			},
-		})
-	}
+	addControllerRole(&controllerRoles, &controllerRoleBindings, rbacv1.ClusterRole{
+		ObjectMeta: metav1.ObjectMeta{Name: saRolePrefix + "expand-controller"},
+		Rules: []rbacv1.PolicyRule{
+			rbacv1helpers.NewRule("get", "list", "watch", "update", "patch").Groups(legacyGroup).Resources("persistentvolumes").RuleOrDie(),
+			rbacv1helpers.NewRule("update", "patch").Groups(legacyGroup).Resources("persistentvolumeclaims/status").RuleOrDie(),
+			rbacv1helpers.NewRule("get", "list", "watch").Groups(legacyGroup).Resources("persistentvolumeclaims").RuleOrDie(),
+			// glusterfs
+			rbacv1helpers.NewRule("get", "list", "watch").Groups(storageGroup).Resources("storageclasses").RuleOrDie(),
+			rbacv1helpers.NewRule("get").Groups(legacyGroup).Resources("services", "endpoints").RuleOrDie(),
+			rbacv1helpers.NewRule("get").Groups(legacyGroup).Resources("secrets").RuleOrDie(),
+			eventsRule(),
+		},
+	})
 
 	addControllerRole(&controllerRoles, &controllerRoleBindings, rbacv1.ClusterRole{
 		ObjectMeta: metav1.ObjectMeta{Name: saRolePrefix + "ephemeral-volume-controller"},

plugin/pkg/auth/authorizer/rbac/bootstrappolicy/policy.go

@@ -24,9 +24,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apiserver/pkg/authentication/serviceaccount"
 	"k8s.io/apiserver/pkg/authentication/user"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	rbacv1helpers "k8s.io/kubernetes/pkg/apis/rbac/v1"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 // Write and other vars are slices of the allowed verbs.
@@ -161,12 +159,10 @@ func NodeRules() []rbacv1.PolicyRule {
 		rbacv1helpers.NewRule("create").Groups(legacyGroup).Resources("serviceaccounts/token").RuleOrDie(),
 	}
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) {
-		// Use the Node authorization mode to limit a node to update status of pvc objects referenced by pods bound to itself.
-		// Use the NodeRestriction admission plugin to limit a node to just update the status stanza.
-		pvcStatusPolicyRule := rbacv1helpers.NewRule("get", "update", "patch").Groups(legacyGroup).Resources("persistentvolumeclaims/status").RuleOrDie()
-		nodePolicyRules = append(nodePolicyRules, pvcStatusPolicyRule)
-	}
+	// Use the Node authorization mode to limit a node to update status of pvc objects referenced by pods bound to itself.
+	// Use the NodeRestriction admission plugin to limit a node to just update the status stanza.
+	pvcStatusPolicyRule := rbacv1helpers.NewRule("get", "update", "patch").Groups(legacyGroup).Resources("persistentvolumeclaims/status").RuleOrDie()
+	nodePolicyRules = append(nodePolicyRules, pvcStatusPolicyRule)
 
 	// CSI
 	csiDriverRule := rbacv1helpers.NewRule("get", "watch", "list").Groups("storage.k8s.io").Resources("csidrivers").RuleOrDie()

test/integration/auth/node_test.go

@@ -567,13 +567,7 @@ func TestNodeAuthorizer(t *testing.T) {
 	// re-create a pod as an admin to add object references
 	expectAllowed(t, createNode2NormalPod(superuserClient))
 
-	// ExpandPersistentVolumes feature disabled
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExpandPersistentVolumes, false)()
-	expectForbidden(t, updatePVCCapacity(node1Client))
-	expectForbidden(t, updatePVCCapacity(node2Client))
-
 	// ExpandPersistentVolumes feature enabled
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExpandPersistentVolumes, true)()
 	expectForbidden(t, updatePVCCapacity(node1Client))
 	expectAllowed(t, updatePVCCapacity(node2Client))
 	expectForbidden(t, updatePVCPhase(node2Client))