Stop checking VolumeScheduling feature gate

cmd/kube-scheduler/app/BUILD

@@ -14,7 +14,6 @@ go_library(
         "//cmd/kube-scheduler/app/options:go_default_library",
         "//pkg/api/legacyscheme:go_default_library",
         "//pkg/controller:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/scheduler:go_default_library",
         "//pkg/scheduler/algorithmprovider:go_default_library",
         "//pkg/scheduler/api:go_default_library",
@@ -38,10 +37,8 @@ go_library(
         "//staging/src/k8s.io/apiserver/pkg/server/healthz:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/server/mux:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/server/routes:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/util/flag:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/util/globalflag:go_default_library",
-        "//staging/src/k8s.io/client-go/informers/storage/v1:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes/typed/core/v1:go_default_library",
         "//staging/src/k8s.io/client-go/tools/leaderelection:go_default_library",
         "//vendor/github.com/prometheus/client_golang/prometheus:go_default_library",

cmd/kube-scheduler/app/server.go

@@ -38,17 +38,14 @@ import (
 	"k8s.io/apiserver/pkg/server/healthz"
 	"k8s.io/apiserver/pkg/server/mux"
 	"k8s.io/apiserver/pkg/server/routes"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	apiserverflag "k8s.io/apiserver/pkg/util/flag"
 	"k8s.io/apiserver/pkg/util/globalflag"
-	storageinformers "k8s.io/client-go/informers/storage/v1"
 	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/client-go/tools/leaderelection"
 	schedulerserverconfig "k8s.io/kubernetes/cmd/kube-scheduler/app/config"
 	"k8s.io/kubernetes/cmd/kube-scheduler/app/options"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	"k8s.io/kubernetes/pkg/controller"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/scheduler"
 	"k8s.io/kubernetes/pkg/scheduler/algorithmprovider"
 	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
@@ -165,11 +162,6 @@ func runCommand(cmd *cobra.Command, args []string, opts *options.Options) error
 
 // Run executes the scheduler based on the given configuration. It only return on error or when stopCh is closed.
 func Run(cc schedulerserverconfig.CompletedConfig, stopCh <-chan struct{}) error {
-	var storageClassInformer storageinformers.StorageClassInformer
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		storageClassInformer = cc.InformerFactory.Storage().V1().StorageClasses()
-	}
-
 	// Create the scheduler.
 	sched, err := scheduler.New(cc.Client,
 		cc.InformerFactory.Core().V1().Nodes(),
@@ -181,7 +173,7 @@ func Run(cc schedulerserverconfig.CompletedConfig, stopCh <-chan struct{}) error
 		cc.InformerFactory.Apps().V1().StatefulSets(),
 		cc.InformerFactory.Core().V1().Services(),
 		cc.InformerFactory.Policy().V1beta1().PodDisruptionBudgets(),
-		storageClassInformer,
+		cc.InformerFactory.Storage().V1().StorageClasses(),
 		cc.Recorder,
 		cc.ComponentConfig.AlgorithmSource,
 		stopCh,
@@ -335,11 +327,6 @@ func newHealthzHandler(config *kubeschedulerconfig.KubeSchedulerConfiguration, s
 
 // NewSchedulerConfig creates the scheduler configuration. This is exposed for use by tests.
 func NewSchedulerConfig(s schedulerserverconfig.CompletedConfig) (*factory.Config, error) {
-	var storageClassInformer storageinformers.StorageClassInformer
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		storageClassInformer = s.InformerFactory.Storage().V1().StorageClasses()
-	}
-
 	// Set up the configurator which can create schedulers from configs.
 	configurator := factory.NewConfigFactory(&factory.ConfigFactoryArgs{
 		SchedulerName:                  s.ComponentConfig.SchedulerName,
@@ -353,7 +340,7 @@ func NewSchedulerConfig(s schedulerserverconfig.CompletedConfig) (*factory.Confi
 		StatefulSetInformer:            s.InformerFactory.Apps().V1().StatefulSets(),
 		ServiceInformer:                s.InformerFactory.Core().V1().Services(),
 		PdbInformer:                    s.InformerFactory.Policy().V1beta1().PodDisruptionBudgets(),
-		StorageClassInformer:           storageClassInformer,
+		StorageClassInformer:           s.InformerFactory.Storage().V1().StorageClasses(),
 		HardPodAffinitySymmetricWeight: s.ComponentConfig.HardPodAffinitySymmetricWeight,
 		DisablePreemption:              s.ComponentConfig.DisablePreemption,
 		PercentageOfNodesToScore:       s.ComponentConfig.PercentageOfNodesToScore,

pkg/apis/core/validation/validation.go

@@ -1783,12 +1783,10 @@ func ValidatePersistentVolumeUpdate(newPv, oldPv *core.PersistentVolume) field.E
 
 	allErrs = append(allErrs, ValidateImmutableField(newPv.Spec.VolumeMode, oldPv.Spec.VolumeMode, field.NewPath("volumeMode"))...)
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	// Allow setting NodeAffinity if oldPv NodeAffinity was not set
 	if oldPv.Spec.NodeAffinity != nil {
 		allErrs = append(allErrs, ValidateImmutableField(newPv.Spec.NodeAffinity, oldPv.Spec.NodeAffinity, field.NewPath("nodeAffinity"))...)
 	}
-	}
 
 	return allErrs
 }
@@ -3168,9 +3166,7 @@ func ValidateTopologySelectorTerm(term core.TopologySelectorTerm, fldPath *field
 	exprMap := make(map[string]sets.String)
 	exprPath := fldPath.Child("matchLabelExpressions")
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	// Allow empty MatchLabelExpressions, in case this field becomes optional in the future.
-
 	for i, req := range term.MatchLabelExpressions {
 		idxPath := exprPath.Index(i)
 		valueSet, exprErrs := validateTopologySelectorLabelRequirement(req, idxPath)
@@ -3182,9 +3178,6 @@ func ValidateTopologySelectorTerm(term core.TopologySelectorTerm, fldPath *field
 		}
 		exprMap[req.Key] = valueSet
 	}
-	} else if len(term.MatchLabelExpressions) != 0 {
-		allErrs = append(allErrs, field.Forbidden(fldPath, "field is disabled by feature-gate VolumeScheduling"))
-	}
 
 	return exprMap, allErrs
 }
@@ -5336,10 +5329,6 @@ func validateVolumeNodeAffinity(nodeAffinity *core.VolumeNodeAffinity, fldPath *
 		return false, allErrs
 	}
 
-	if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		allErrs = append(allErrs, field.Forbidden(fldPath, "Volume node affinity is disabled by feature-gate"))
-	}
-
 	if nodeAffinity.Required != nil {
 		allErrs = append(allErrs, ValidateNodeSelector(nodeAffinity.Required, fldPath.Child("required"))...)
 	} else {

pkg/apis/core/validation/validation_test.go

@@ -577,19 +577,6 @@ func TestValidateLocalVolumesDisabled(t *testing.T) {
 			}
 		})
 	}
-
-	for name, scenario := range scenarios {
-		t.Run(name+" VolumeScheduling disabled", func(t *testing.T) {
-			defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, false)()
-			errs := ValidatePersistentVolume(scenario.volume)
-			if len(errs) == 0 && scenario.isExpectedFailure {
-				t.Errorf("Unexpected success for scenario: %s", name)
-			}
-			if len(errs) > 0 && !scenario.isExpectedFailure {
-				t.Errorf("Unexpected failure for scenario: %s - %+v", name, errs)
-			}
-		})
-	}
 }
 
 func testVolumeWithNodeAffinity(affinity *core.VolumeNodeAffinity) *core.PersistentVolume {

pkg/apis/storage/util/BUILD

@@ -39,7 +39,6 @@ go_test(
     srcs = ["util_test.go"],
     embed = [":go_default_library"],
     deps = [
-        "//pkg/apis/core:go_default_library",
         "//pkg/apis/storage:go_default_library",
         "//pkg/features:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/diff:go_default_library",

pkg/apis/storage/util/util.go

@@ -24,14 +24,6 @@ import (
 
 // DropDisabledFields removes disabled fields from the StorageClass object.
 func DropDisabledFields(class, oldClass *storage.StorageClass) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		class.VolumeBindingMode = nil
-		class.AllowedTopologies = nil
-		if oldClass != nil {
-			oldClass.VolumeBindingMode = nil
-			oldClass.AllowedTopologies = nil
-		}
-	}
 	if !utilfeature.DefaultFeatureGate.Enabled(features.ExpandPersistentVolumes) && !allowVolumeExpansionInUse(oldClass) {
 		class.AllowVolumeExpansion = nil
 	}

pkg/apis/storage/util/util_test.go

@@ -24,53 +24,10 @@ import (
 	"k8s.io/apimachinery/pkg/util/diff"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
-	api "k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/apis/storage"
 	"k8s.io/kubernetes/pkg/features"
 )
 
-func TestDropAlphaFields(t *testing.T) {
-	bindingMode := storage.VolumeBindingWaitForFirstConsumer
-	allowedTopologies := []api.TopologySelectorTerm{
-		{
-			MatchLabelExpressions: []api.TopologySelectorLabelRequirement{
-				{
-					Key:    "kubernetes.io/hostname",
-					Values: []string{"node1"},
-				},
-			},
-		},
-	}
-
-	// Test that field gets dropped when feature gate is not set
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, false)()
-	class := &storage.StorageClass{
-		VolumeBindingMode: &bindingMode,
-		AllowedTopologies: allowedTopologies,
-	}
-	DropDisabledFields(class, nil)
-	if class.VolumeBindingMode != nil {
-		t.Errorf("VolumeBindingMode field didn't get dropped: %+v", class.VolumeBindingMode)
-	}
-	if class.AllowedTopologies != nil {
-		t.Errorf("AllowedTopologies field didn't get dropped: %+v", class.AllowedTopologies)
-	}
-
-	// Test that field does not get dropped when feature gate is set
-	class = &storage.StorageClass{
-		VolumeBindingMode: &bindingMode,
-		AllowedTopologies: allowedTopologies,
-	}
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
-	DropDisabledFields(class, nil)
-	if class.VolumeBindingMode != &bindingMode {
-		t.Errorf("VolumeBindingMode field got unexpectantly modified: %+v", class.VolumeBindingMode)
-	}
-	if !reflect.DeepEqual(class.AllowedTopologies, allowedTopologies) {
-		t.Errorf("AllowedTopologies field got unexpectantly modified: %+v", class.AllowedTopologies)
-	}
-}
-
 func TestDropAllowVolumeExpansion(t *testing.T) {
 	allowVolumeExpansion := false
 	scWithoutAllowVolumeExpansion := func() *storage.StorageClass {

pkg/apis/storage/v1/BUILD

@@ -19,13 +19,11 @@ go_library(
     deps = [
         "//pkg/apis/core:go_default_library",
         "//pkg/apis/storage:go_default_library",
-        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/api/core/v1:go_default_library",
         "//staging/src/k8s.io/api/storage/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/conversion:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
     ],
 )
 
@@ -52,10 +50,7 @@ go_test(
     deps = [
         "//pkg/api/legacyscheme:go_default_library",
         "//pkg/apis/storage/install:go_default_library",
-        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/api/storage/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature/testing:go_default_library",
     ],
 )

pkg/apis/storage/v1/defaults.go

@@ -20,8 +20,6 @@ import (
 	"k8s.io/api/core/v1"
 	storagev1 "k8s.io/api/storage/v1"
 	"k8s.io/apimachinery/pkg/runtime"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 func addDefaultingFuncs(scheme *runtime.Scheme) error {
@@ -34,7 +32,7 @@ func SetDefaults_StorageClass(obj *storagev1.StorageClass) {
 		*obj.ReclaimPolicy = v1.PersistentVolumeReclaimDelete
 	}
 
-	if obj.VolumeBindingMode == nil && utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
+	if obj.VolumeBindingMode == nil {
 		obj.VolumeBindingMode = new(storagev1.VolumeBindingMode)
 		*obj.VolumeBindingMode = storagev1.VolumeBindingImmediate
 	}

pkg/apis/storage/v1/defaults_test.go

@@ -22,11 +22,8 @@ import (
 
 	storagev1 "k8s.io/api/storage/v1"
 	"k8s.io/apimachinery/pkg/runtime"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	_ "k8s.io/kubernetes/pkg/apis/storage/install"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 func roundTrip(t *testing.T, obj runtime.Object) runtime.Object {
@@ -53,7 +50,7 @@ func roundTrip(t *testing.T, obj runtime.Object) runtime.Object {
 func TestSetDefaultVolumeBindingMode(t *testing.T) {
 	class := &storagev1.StorageClass{}
 
-	// When feature gate is enabled, field should be defaulted
+	// field should be defaulted
 	defaultMode := storagev1.VolumeBindingImmediate
 	output := roundTrip(t, runtime.Object(class)).(*storagev1.StorageClass)
 	outMode := output.VolumeBindingMode
@@ -62,13 +59,4 @@ func TestSetDefaultVolumeBindingMode(t *testing.T) {
 	} else if *outMode != defaultMode {
 		t.Errorf("Expected VolumeBindingMode to be defaulted to: %+v, got: %+v", defaultMode, outMode)
 	}
-
-	class = &storagev1.StorageClass{}
-
-	// When feature gate is disabled, field should not be defaulted
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, false)()
-	output = roundTrip(t, runtime.Object(class)).(*storagev1.StorageClass)
-	if output.VolumeBindingMode != nil {
-		t.Errorf("Expected VolumeBindingMode to not be defaulted, got: %+v", output.VolumeBindingMode)
-	}
 }

pkg/apis/storage/v1beta1/BUILD

@@ -19,13 +19,11 @@ go_library(
     deps = [
         "//pkg/apis/core:go_default_library",
         "//pkg/apis/storage:go_default_library",
-        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/api/core/v1:go_default_library",
         "//staging/src/k8s.io/api/storage/v1beta1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/conversion:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
     ],
 )
 
@@ -52,10 +50,7 @@ go_test(
     deps = [
         "//pkg/api/legacyscheme:go_default_library",
         "//pkg/apis/storage/install:go_default_library",
-        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/api/storage/v1beta1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature/testing:go_default_library",
     ],
 )

pkg/apis/storage/v1beta1/defaults.go

@@ -20,8 +20,6 @@ import (
 	"k8s.io/api/core/v1"
 	storagev1beta1 "k8s.io/api/storage/v1beta1"
 	"k8s.io/apimachinery/pkg/runtime"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 func addDefaultingFuncs(scheme *runtime.Scheme) error {
@@ -34,7 +32,7 @@ func SetDefaults_StorageClass(obj *storagev1beta1.StorageClass) {
 		*obj.ReclaimPolicy = v1.PersistentVolumeReclaimDelete
 	}
 
-	if obj.VolumeBindingMode == nil && utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
+	if obj.VolumeBindingMode == nil {
 		obj.VolumeBindingMode = new(storagev1beta1.VolumeBindingMode)
 		*obj.VolumeBindingMode = storagev1beta1.VolumeBindingImmediate
 	}

pkg/apis/storage/v1beta1/defaults_test.go

@@ -22,11 +22,8 @@ import (
 
 	storagev1beta1 "k8s.io/api/storage/v1beta1"
 	"k8s.io/apimachinery/pkg/runtime"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	_ "k8s.io/kubernetes/pkg/apis/storage/install"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 func roundTrip(t *testing.T, obj runtime.Object) runtime.Object {
@@ -53,7 +50,7 @@ func roundTrip(t *testing.T, obj runtime.Object) runtime.Object {
 func TestSetDefaultVolumeBindingMode(t *testing.T) {
 	class := &storagev1beta1.StorageClass{}
 
-	// When feature gate is enabled, field should be defaulted
+	// field should be defaulted
 	defaultMode := storagev1beta1.VolumeBindingImmediate
 	output := roundTrip(t, runtime.Object(class)).(*storagev1beta1.StorageClass)
 	outMode := output.VolumeBindingMode
@@ -62,14 +59,4 @@ func TestSetDefaultVolumeBindingMode(t *testing.T) {
 	} else if *outMode != defaultMode {
 		t.Errorf("Expected VolumeBindingMode to be defaulted to: %+v, got: %+v", defaultMode, outMode)
 	}
-
-	class = &storagev1beta1.StorageClass{}
-
-	// When feature gate is disabled, field should not be defaulted
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, false)()
-	output = roundTrip(t, runtime.Object(class)).(*storagev1beta1.StorageClass)
-	if output.VolumeBindingMode != nil {
-		t.Errorf("Expected VolumeBindingMode to not be defaulted, got: %+v", output.VolumeBindingMode)
-	}
-
 }

pkg/apis/storage/validation/BUILD

@@ -15,12 +15,10 @@ go_library(
         "//pkg/apis/core/helper:go_default_library",
         "//pkg/apis/core/validation:go_default_library",
         "//pkg/apis/storage:go_default_library",
-        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/api/equality:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/validation:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/validation/field:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
     ],
 )
 
@@ -31,10 +29,7 @@ go_test(
     deps = [
         "//pkg/apis/core:go_default_library",
         "//pkg/apis/storage:go_default_library",
-        "//pkg/features:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature/testing:go_default_library",
     ],
 )
 

pkg/apis/storage/validation/validation.go

@@ -24,12 +24,10 @@ import (
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/validation"
 	"k8s.io/apimachinery/pkg/util/validation/field"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	api "k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/apis/core/helper"
 	apivalidation "k8s.io/kubernetes/pkg/apis/core/validation"
 	"k8s.io/kubernetes/pkg/apis/storage"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 const (
@@ -233,15 +231,11 @@ var supportedVolumeBindingModes = sets.NewString(string(storage.VolumeBindingImm
 // validateVolumeBindingMode tests that VolumeBindingMode specifies valid values.
 func validateVolumeBindingMode(mode *storage.VolumeBindingMode, fldPath *field.Path) field.ErrorList {
 	allErrs := field.ErrorList{}
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	if mode == nil {
 		allErrs = append(allErrs, field.Required(fldPath, ""))
 	} else if !supportedVolumeBindingModes.Has(string(*mode)) {
 		allErrs = append(allErrs, field.NotSupported(fldPath, mode, supportedVolumeBindingModes.List()))
 	}
-	} else if mode != nil {
-		allErrs = append(allErrs, field.Forbidden(fldPath, "field is disabled by feature-gate VolumeScheduling"))
-	}
 
 	return allErrs
 }
@@ -254,10 +248,6 @@ func validateAllowedTopologies(topologies []api.TopologySelectorTerm, fldPath *f
 		return allErrs
 	}
 
-	if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		allErrs = append(allErrs, field.Forbidden(fldPath, "field is disabled by feature-gate VolumeScheduling"))
-	}
-
 	rawTopologies := make([]map[string]sets.String, len(topologies))
 	for i, term := range topologies {
 		idxPath := fldPath.Index(i)

pkg/apis/storage/validation/validation_test.go

@@ -22,11 +22,8 @@ import (
 	"testing"
 
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	api "k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/apis/storage"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 var (
@@ -480,22 +477,6 @@ func makeClass(mode *storage.VolumeBindingMode, topologies []api.TopologySelecto
 	}
 }
 
-// TODO: Remove these tests once feature gate is not required
-func TestValidateVolumeBindingModeAlphaDisabled(t *testing.T) {
-	errorCases := map[string]*storage.StorageClass{
-		"immediate mode": makeClass(&immediateMode1, nil),
-		"waiting mode":   makeClass(&waitingMode, nil),
-		"invalid mode":   makeClass(&invalidMode, nil),
-	}
-
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, false)()
-	for testName, storageClass := range errorCases {
-		if errs := ValidateStorageClass(storageClass); len(errs) == 0 {
-			t.Errorf("Expected failure for test: %v", testName)
-		}
-	}
-}
-
 type bindingTest struct {
 	class         *storage.StorageClass
 	shouldSucceed bool
@@ -521,8 +502,6 @@ func TestValidateVolumeBindingMode(t *testing.T) {
 		},
 	}
 
-	// TODO: remove when feature gate not required
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	for testName, testCase := range cases {
 		errs := ValidateStorageClass(testCase.class)
 		if testCase.shouldSucceed && len(errs) != 0 {
@@ -579,8 +558,6 @@ func TestValidateUpdateVolumeBindingMode(t *testing.T) {
 		},
 	}
 
-	// TODO: remove when feature gate not required
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	for testName, testCase := range cases {
 		errs := ValidateStorageClassUpdate(testCase.newClass, testCase.oldClass)
 		if testCase.shouldSucceed && len(errs) != 0 {
@@ -883,7 +860,6 @@ func TestValidateAllowedTopologies(t *testing.T) {
 		},
 	}
 
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	for testName, testCase := range cases {
 		errs := ValidateStorageClass(testCase.class)
 		if testCase.shouldSucceed && len(errs) != 0 {
@@ -893,12 +869,4 @@ func TestValidateAllowedTopologies(t *testing.T) {
 			t.Errorf("Expected failure for test %q, got success", testName)
 		}
 	}
-
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, false)()
-	for testName, testCase := range cases {
-		errs := ValidateStorageClass(testCase.class)
-		if len(errs) == 0 && testCase.class.AllowedTopologies != nil {
-			t.Errorf("Expected failure for test %q, got success", testName)
-		}
-	}
 }

pkg/controller/cloud/BUILD

@@ -18,7 +18,6 @@ go_library(
         "//pkg/api/v1/node:go_default_library",
         "//pkg/apis/core/v1/helper:go_default_library",
         "//pkg/controller:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/kubelet/apis:go_default_library",
         "//pkg/scheduler/api:go_default_library",
         "//pkg/util/node:go_default_library",
@@ -33,7 +32,6 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/util/strategicpatch:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/wait:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/watch:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/client-go/informers/core/v1:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes/scheme:go_default_library",
@@ -60,7 +58,6 @@ go_test(
         "//pkg/cloudprovider/providers/fake:go_default_library",
         "//pkg/controller:go_default_library",
         "//pkg/controller/testutil:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/kubelet/apis:go_default_library",
         "//pkg/scheduler/api:go_default_library",
         "//pkg/volume/util:go_default_library",
@@ -69,8 +66,6 @@ go_test(
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature/testing:go_default_library",
         "//staging/src/k8s.io/client-go/informers:go_default_library",
         "//staging/src/k8s.io/client-go/informers/core/v1:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",

pkg/controller/cloud/pvlcontroller.go

@@ -33,7 +33,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/strategicpatch"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/apimachinery/pkg/watch"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"k8s.io/client-go/kubernetes"
 	corelisters "k8s.io/client-go/listers/core/v1"
 	"k8s.io/client-go/tools/cache"
@@ -41,7 +40,6 @@ import (
 	cloudprovider "k8s.io/cloud-provider"
 	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
 	"k8s.io/kubernetes/pkg/controller"
-	"k8s.io/kubernetes/pkg/features"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	volumeutil "k8s.io/kubernetes/pkg/volume/util"
 )
@@ -204,7 +202,7 @@ func (pvlc *PersistentVolumeLabelController) addLabelsAndAffinityToVolume(vol *v
 func (pvlc *PersistentVolumeLabelController) createPatch(vol *v1.PersistentVolume, volLabels map[string]string) ([]byte, error) {
 	volName := vol.Name
 	newVolume := vol.DeepCopyObject().(*v1.PersistentVolume)
-	populateAffinity := utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) && len(volLabels) != 0
+	populateAffinity := len(volLabels) != 0
 
 	if newVolume.Labels == nil {
 		newVolume.Labels = make(map[string]string)

pkg/controller/cloud/pvlcontroller_test.go

@@ -27,11 +27,8 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 
 	sets "k8s.io/apimachinery/pkg/util/sets"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
-	"k8s.io/kubernetes/pkg/features"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	volumeutil "k8s.io/kubernetes/pkg/volume/util"
 
@@ -451,7 +448,6 @@ func TestCreatePatch(t *testing.T) {
 		},
 	}
 
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	for d, tc := range testCases {
 		cloud := &fakecloud.FakeCloud{}
 		client := fake.NewSimpleClientset()
@@ -520,8 +516,6 @@ func TestAddLabelsToVolume(t *testing.T) {
 		},
 	}
 
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
-
 	for d, tc := range testCases {
 		labeledCh := make(chan bool, 1)
 		client := fake.NewSimpleClientset()

pkg/controller/volume/persistentvolume/pv_controller.go

@@ -286,10 +286,6 @@ func checkVolumeSatisfyClaim(volume *v1.PersistentVolume, claim *v1.PersistentVo
 }
 
 func (ctrl *PersistentVolumeController) shouldDelayBinding(claim *v1.PersistentVolumeClaim) (bool, error) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		return false, nil
-	}
-
 	// When feature VolumeScheduling enabled,
 	// Scheduler signal to the PV controller to start dynamic
 	// provisioning by setting the "annSelectedNode" annotation

pkg/controller/volume/persistentvolume/pv_controller_test.go

@@ -24,15 +24,12 @@ import (
 	storagev1 "k8s.io/api/storage/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/watch"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/klog"
 	"k8s.io/kubernetes/pkg/controller"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 var (
@@ -336,24 +333,3 @@ func TestDelayBinding(t *testing.T) {
 		}
 	}
 }
-
-func TestDelayBindingDisabled(t *testing.T) {
-	// When volumeScheduling feature gate is disabled, should always be immediate
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, false)()
-
-	client := &fake.Clientset{}
-	informerFactory := informers.NewSharedInformerFactory(client, controller.NoResyncPeriodFunc())
-	classInformer := informerFactory.Storage().V1().StorageClasses()
-	ctrl := &PersistentVolumeController{
-		classLister: classInformer.Lister(),
-	}
-
-	name := "volumeScheduling-feature-disabled"
-	shouldDelay, err := ctrl.shouldDelayBinding(makePVCClass(&classWaitMode, false))
-	if err != nil {
-		t.Errorf("Test %q returned error: %v", name, err)
-	}
-	if shouldDelay {
-		t.Errorf("Test %q returned true, expected false", name)
-	}
-}

pkg/features/kube_features.go

@@ -413,7 +413,7 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	PodShareProcessNamespace:                    {Default: true, PreRelease: utilfeature.Beta},
 	PodPriority:                                 {Default: true, PreRelease: utilfeature.Beta},
 	TaintNodesByCondition:                       {Default: true, PreRelease: utilfeature.Beta},
-	MountPropagation:                            {Default: true, PreRelease: utilfeature.GA},
+	MountPropagation:                            {Default: true, PreRelease: utilfeature.GA, LockToDefault: true}, // remove in 1.14
 	QOSReserved:                                 {Default: false, PreRelease: utilfeature.Alpha},
 	ExpandPersistentVolumes:                     {Default: true, PreRelease: utilfeature.Beta},
 	ExpandInUsePersistentVolumes:                {Default: false, PreRelease: utilfeature.Alpha},
@@ -422,7 +422,7 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	CPUCFSQuotaPeriod:                           {Default: false, PreRelease: utilfeature.Alpha},
 	ServiceNodeExclusion:                        {Default: false, PreRelease: utilfeature.Alpha},
 	MountContainers:                             {Default: false, PreRelease: utilfeature.Alpha},
-	VolumeScheduling:                            {Default: true, PreRelease: utilfeature.GA},
+	VolumeScheduling:                            {Default: true, PreRelease: utilfeature.GA, LockToDefault: true}, // remove in 1.16
 	CSIPersistentVolume:                         {Default: true, PreRelease: utilfeature.GA},
 	CSIDriverRegistry:                           {Default: false, PreRelease: utilfeature.Alpha},
 	CSINodeInfo:                                 {Default: false, PreRelease: utilfeature.Alpha},

pkg/scheduler/BUILD

@@ -9,7 +9,6 @@ go_library(
     importpath = "k8s.io/kubernetes/pkg/scheduler",
     visibility = ["//visibility:public"],
     deps = [
-        "//pkg/features:go_default_library",
         "//pkg/scheduler/algorithm:go_default_library",
         "//pkg/scheduler/algorithm/predicates:go_default_library",
         "//pkg/scheduler/api:go_default_library",
@@ -27,7 +26,6 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/wait:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/client-go/informers/apps/v1:go_default_library",
         "//staging/src/k8s.io/client-go/informers/core/v1:go_default_library",
         "//staging/src/k8s.io/client-go/informers/policy/v1beta1:go_default_library",
@@ -46,7 +44,6 @@ go_test(
     deps = [
         "//pkg/api/legacyscheme:go_default_library",
         "//pkg/controller/volume/persistentvolume:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/scheduler/algorithm:go_default_library",
         "//pkg/scheduler/algorithm/predicates:go_default_library",
         "//pkg/scheduler/api:go_default_library",
@@ -66,8 +63,6 @@ go_test(
         "//staging/src/k8s.io/apimachinery/pkg/util/diff:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/wait:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature/testing:go_default_library",
         "//staging/src/k8s.io/client-go/informers:go_default_library",
         "//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
         "//staging/src/k8s.io/client-go/listers/core/v1:go_default_library",

pkg/scheduler/algorithm/predicates/predicates.go

@@ -635,7 +635,6 @@ func (c *VolumeZoneChecker) predicate(pod *v1.Pod, meta PredicateMetadata, nodeI
 
 			pvName := pvc.Spec.VolumeName
 			if pvName == "" {
-				if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 				scName := v1helper.GetPersistentVolumeClaimClass(pvc)
 				if len(scName) > 0 {
 					class, _ := c.classInfo.GetStorageClassInfo(scName)
@@ -649,7 +648,6 @@ func (c *VolumeZoneChecker) predicate(pod *v1.Pod, meta PredicateMetadata, nodeI
 						}
 					}
 				}
-				}
 				return false, nil, fmt.Errorf("PersistentVolumeClaim is not bound: %q", pvcName)
 			}
 
@@ -1618,10 +1616,6 @@ func NewVolumeBindingPredicate(binder *volumebinder.VolumeBinder) FitPredicate {
 }
 
 func (c *VolumeBindingChecker) predicate(pod *v1.Pod, meta PredicateMetadata, nodeInfo *schedulernodeinfo.NodeInfo) (bool, []PredicateFailureReason, error) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		return true, nil, nil
-	}
-
 	node := nodeInfo.Node()
 	if node == nil {
 		return false, nil, fmt.Errorf("node not found")

pkg/scheduler/algorithm/predicates/predicates_test.go

@@ -29,10 +29,7 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/sets"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
-	"k8s.io/kubernetes/pkg/features"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
 	schedulernodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
@@ -4884,8 +4881,6 @@ func TestVolumeZonePredicateWithVolumeBinding(t *testing.T) {
 		},
 	}
 
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
-
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			fit := NewVolumeZonePredicate(pvInfo, pvcInfo, classInfo)

pkg/scheduler/factory/BUILD

@@ -12,7 +12,6 @@ go_library(
     visibility = ["//visibility:public"],
     deps = [
         "//pkg/api/v1/pod:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/kubelet/apis:go_default_library",
         "//pkg/scheduler/algorithm:go_default_library",
         "//pkg/scheduler/algorithm/predicates:go_default_library",
@@ -38,7 +37,6 @@ go_library(
         "//staging/src/k8s.io/apimachinery/pkg/util/runtime:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/wait:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/client-go/informers/apps/v1:go_default_library",
         "//staging/src/k8s.io/client-go/informers/core/v1:go_default_library",
         "//staging/src/k8s.io/client-go/informers/policy/v1beta1:go_default_library",

pkg/scheduler/factory/factory.go

@@ -38,7 +38,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/wait"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	appsinformers "k8s.io/client-go/informers/apps/v1"
 	coreinformers "k8s.io/client-go/informers/core/v1"
 	policyinformers "k8s.io/client-go/informers/policy/v1beta1"
@@ -51,7 +50,6 @@ import (
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/record"
 	podutil "k8s.io/kubernetes/pkg/api/v1/pod"
-	"k8s.io/kubernetes/pkg/features"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	"k8s.io/kubernetes/pkg/scheduler/algorithm"
 	"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
@@ -378,7 +376,6 @@ func NewConfigFactory(args *ConfigFactoryArgs) Configurator {
 		},
 	)
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	// Setup volume binder
 	c.volumeBinder = volumebinder.NewVolumeBinder(args.Client, args.PvcInformer, args.PvInformer, args.StorageClassInformer, time.Duration(args.BindTimeoutSeconds)*time.Second)
 
@@ -387,7 +384,6 @@ func NewConfigFactory(args *ConfigFactoryArgs) Configurator {
 			AddFunc: c.onStorageClassAdd,
 		},
 	)
-	}
 
 	// Setup cache comparer
 	debugger := cachedebugger.New(
@@ -491,9 +487,6 @@ func (c *configFactory) onPvcAdd(obj interface{}) {
 }
 
 func (c *configFactory) onPvcUpdate(old, new interface{}) {
-	if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		return
-	}
 	c.podQueue.MoveAllToActiveQueue()
 }
 

pkg/scheduler/scheduler.go

@@ -29,14 +29,12 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	appsinformers "k8s.io/client-go/informers/apps/v1"
 	coreinformers "k8s.io/client-go/informers/core/v1"
 	policyinformers "k8s.io/client-go/informers/policy/v1beta1"
 	storageinformers "k8s.io/client-go/informers/storage/v1"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/record"
-	"k8s.io/kubernetes/pkg/features"
 	schedulerapi "k8s.io/kubernetes/pkg/scheduler/api"
 	latestschedulerapi "k8s.io/kubernetes/pkg/scheduler/api/latest"
 	kubeschedulerconfig "k8s.io/kubernetes/pkg/scheduler/apis/config"
@@ -352,13 +350,11 @@ func (sched *Scheduler) preempt(preemptor *v1.Pod, scheduleErr error) (string, e
 //
 // This function modifies assumed if volume binding is required.
 func (sched *Scheduler) assumeVolumes(assumed *v1.Pod, host string) (allBound bool, err error) {
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	allBound, err = sched.config.VolumeBinder.Binder.AssumePodVolumes(assumed, host)
 	if err != nil {
 		sched.recordSchedulingFailure(assumed, err, SchedulerError,
 			fmt.Sprintf("AssumePodVolumes failed: %v", err))
 	}
-	}
 	return
 }
 

pkg/scheduler/scheduler_test.go

@@ -32,8 +32,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/diff"
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/wait"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	"k8s.io/client-go/informers"
 	clientsetfake "k8s.io/client-go/kubernetes/fake"
 	corelister "k8s.io/client-go/listers/core/v1"
@@ -41,7 +39,6 @@ import (
 	"k8s.io/client-go/tools/record"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	"k8s.io/kubernetes/pkg/controller/volume/persistentvolume"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/scheduler/algorithm"
 	"k8s.io/kubernetes/pkg/scheduler/algorithm/predicates"
 	"k8s.io/kubernetes/pkg/scheduler/api"
@@ -779,8 +776,6 @@ func TestSchedulerWithVolumeBinding(t *testing.T) {
 	// This can be small because we wait for pod to finish scheduling first
 	chanTimeout := 2 * time.Second
 
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
-
 	table := []struct {
 		name               string
 		expectError        error

pkg/volume/awsebs/aws_ebs.go

@@ -576,12 +576,10 @@ func (c *awsElasticBlockStoreProvisioner) Provision(selectedNode *v1.Node, allow
 		}
 	}
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	pv.Spec.NodeAffinity = new(v1.VolumeNodeAffinity)
 	pv.Spec.NodeAffinity.Required = new(v1.NodeSelector)
 	pv.Spec.NodeAffinity.Required.NodeSelectorTerms = make([]v1.NodeSelectorTerm, 1)
 	pv.Spec.NodeAffinity.Required.NodeSelectorTerms[0].MatchExpressions = requirements
-	}
 
 	return pv, nil
 }

pkg/volume/azure_dd/azure_provision.go

@@ -311,7 +311,6 @@ func (p *azureDiskProvisioner) Provision(selectedNode *v1.Node, allowedTopologie
 		},
 	}
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	nodeSelectorTerms := make([]v1.NodeSelectorTerm, 0)
 
 	if zoned {
@@ -357,7 +356,6 @@ func (p *azureDiskProvisioner) Provision(selectedNode *v1.Node, allowedTopologie
 			},
 		}
 	}
-	}
 
 	return pv, nil
 }

pkg/volume/cinder/cinder.go

@@ -561,7 +561,6 @@ func (c *cinderVolumeProvisioner) Provision(selectedNode *v1.Node, allowedTopolo
 		pv.Spec.AccessModes = c.plugin.GetAccessModes()
 	}
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 	requirements := make([]v1.NodeSelectorRequirement, 0)
 	for k, v := range labels {
 		if v != "" {
@@ -574,7 +573,6 @@ func (c *cinderVolumeProvisioner) Provision(selectedNode *v1.Node, allowedTopolo
 		pv.Spec.NodeAffinity.Required.NodeSelectorTerms = make([]v1.NodeSelectorTerm, 1)
 		pv.Spec.NodeAffinity.Required.NodeSelectorTerms[0].MatchExpressions = requirements
 	}
-	}
 
 	return pv, nil
 }

pkg/volume/gcepd/gce_pd.go

@@ -551,7 +551,7 @@ func (c *gcePersistentDiskProvisioner) Provision(selectedNode *v1.Node, allowedT
 		}
 	}
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) && len(requirements) > 0 {
+	if len(requirements) > 0 {
 		pv.Spec.NodeAffinity = new(v1.VolumeNodeAffinity)
 		pv.Spec.NodeAffinity.Required = new(v1.NodeSelector)
 		pv.Spec.NodeAffinity.Required.NodeSelectorTerms = make([]v1.NodeSelectorTerm, 1)

pkg/volume/util/BUILD

@@ -60,7 +60,6 @@ go_test(
     deps = [
         "//pkg/apis/core/install:go_default_library",
         "//pkg/apis/core/v1/helper:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/kubelet/apis:go_default_library",
         "//pkg/util/mount:go_default_library",
         "//pkg/util/slice:go_default_library",
@@ -70,8 +69,6 @@ go_test(
         "//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/apimachinery/pkg/util/sets:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature/testing:go_default_library",
         "//staging/src/k8s.io/client-go/util/testing:go_default_library",
     ],
 )

plugin/pkg/admission/storage/persistentvolume/label/BUILD

@@ -18,13 +18,11 @@ go_library(
         "//pkg/cloudprovider/providers/aws:go_default_library",
         "//pkg/cloudprovider/providers/azure:go_default_library",
         "//pkg/cloudprovider/providers/gce:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/kubeapiserver/admission:go_default_library",
         "//pkg/kubelet/apis:go_default_library",
         "//pkg/volume:go_default_library",
         "//pkg/volume/util:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/admission:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/cloud-provider:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
     ],
@@ -37,15 +35,12 @@ go_test(
     deps = [
         "//pkg/apis/core:go_default_library",
         "//pkg/cloudprovider/providers/aws:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/kubelet/apis:go_default_library",
         "//pkg/volume/util:go_default_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/admission:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature/testing:go_default_library",
     ],
 )
 

plugin/pkg/admission/storage/persistentvolume/label/admission.go

@@ -23,14 +23,12 @@ import (
 	"sync"
 
 	"k8s.io/apiserver/pkg/admission"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	cloudprovider "k8s.io/cloud-provider"
 	"k8s.io/klog"
 	api "k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/cloudprovider/providers/aws"
 	"k8s.io/kubernetes/pkg/cloudprovider/providers/azure"
 	"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
-	"k8s.io/kubernetes/pkg/features"
 	kubeapiserveradmission "k8s.io/kubernetes/pkg/kubeapiserver/admission"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	vol "k8s.io/kubernetes/pkg/volume"
@@ -158,7 +156,6 @@ func (l *persistentVolumeLabel) Admit(a admission.Attributes) (err error) {
 			requirements = append(requirements, api.NodeSelectorRequirement{Key: k, Operator: api.NodeSelectorOpIn, Values: values})
 		}
 
-		if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
 		if volume.Spec.NodeAffinity == nil {
 			volume.Spec.NodeAffinity = new(api.VolumeNodeAffinity)
 		}
@@ -180,7 +177,6 @@ func (l *persistentVolumeLabel) Admit(a admission.Attributes) (err error) {
 			}
 		}
 	}
-	}
 
 	return nil
 }

plugin/pkg/admission/storage/persistentvolume/label/admission_test.go

@@ -27,11 +27,8 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apiserver/pkg/admission"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	utilfeaturetesting "k8s.io/apiserver/pkg/util/feature/testing"
 	api "k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/cloudprovider/providers/aws"
-	"k8s.io/kubernetes/pkg/features"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	volumeutil "k8s.io/kubernetes/pkg/volume/util"
 )
@@ -125,8 +122,6 @@ func TestAdmission(t *testing.T) {
 		},
 	}
 
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
-
 	// Non-cloud PVs are ignored
 	err := handler.Admit(admission.NewAttributesRecord(&ignoredPV, nil, api.Kind("PersistentVolume").WithVersion("version"), ignoredPV.Namespace, ignoredPV.Name, api.Resource("persistentvolumes").WithVersion("version"), "", admission.Create, false, nil))
 	if err != nil {

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

@@ -489,17 +489,14 @@ func ClusterRoles() []rbacv1.ClusterRole {
 				rbacv1helpers.NewRule("create").Groups(certificatesGroup).Resources("certificatesigningrequests/selfnodeclient").RuleOrDie(),
 			},
 		},
-	}
-
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		roles = append(roles, rbacv1.ClusterRole{
+		{
 			ObjectMeta: metav1.ObjectMeta{Name: "system:volume-scheduler"},
 			Rules: []rbacv1.PolicyRule{
 				rbacv1helpers.NewRule(ReadUpdate...).Groups(legacyGroup).Resources("persistentvolumes").RuleOrDie(),
 				rbacv1helpers.NewRule(Read...).Groups(storageGroup).Resources("storageclasses").RuleOrDie(),
 				rbacv1helpers.NewRule(ReadUpdate...).Groups(legacyGroup).Resources("persistentvolumeclaims").RuleOrDie(),
 			},
-		})
+		},
 	}
 
 	externalProvisionerRules := []rbacv1.PolicyRule{
@@ -535,6 +532,7 @@ func ClusterRoleBindings() []rbacv1.ClusterRoleBinding {
 		rbacv1helpers.NewClusterBinding("system:kube-dns").SAs("kube-system", "kube-dns").BindingOrDie(),
 		rbacv1helpers.NewClusterBinding("system:kube-scheduler").Users(user.KubeScheduler).BindingOrDie(),
 		rbacv1helpers.NewClusterBinding("system:aws-cloud-provider").SAs("kube-system", "aws-cloud-provider").BindingOrDie(),
+		rbacv1helpers.NewClusterBinding("system:volume-scheduler").Users(user.KubeScheduler).BindingOrDie(),
 
 		// This default binding of the system:node role to the system:nodes group is deprecated in 1.7 with the availability of the Node authorizer.
 		// This leaves the binding, but with an empty set of subjects, so that tightening reconciliation can remove the subject.
@@ -544,10 +542,6 @@ func ClusterRoleBindings() []rbacv1.ClusterRoleBinding {
 		},
 	}
 
-	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
-		rolebindings = append(rolebindings, rbacv1helpers.NewClusterBinding("system:volume-scheduler").Users(user.KubeScheduler).BindingOrDie())
-	}
-
 	addClusterRoleBindingLabel(rolebindings)
 
 	return rolebindings

staging/src/k8s.io/apiserver/pkg/util/feature/feature_gate.go

@@ -63,7 +63,11 @@ var (
 )
 
 type FeatureSpec struct {
+	// Default is the default enablement state for the feature
 	Default bool
+	// LockToDefault indicates that the feature is locked to its default and cannot be changed
+	LockToDefault bool
+	// PreRelease indicates the maturity level of the feature
 	PreRelease prerelease
 }
 
@@ -199,6 +203,9 @@ func (f *featureGate) SetFromMap(m map[string]bool) error {
 		if !ok {
 			return fmt.Errorf("unrecognized feature gate: %s", k)
 		}
+		if featureSpec.LockToDefault && featureSpec.Default != v {
+			return fmt.Errorf("cannot set feature gate %v to %v, feature is locked to %v", k, v, featureSpec.Default)
+		}
 		enabled[k] = v
 		// Handle "special" features like "all alpha gates"
 		if fn, found := f.special[k]; found {

staging/src/k8s.io/apiserver/pkg/util/feature/feature_gate_test.go

@@ -221,6 +221,8 @@ func TestFeatureGateSetFromMap(t *testing.T) {
 	// gates for testing
 	const testAlphaGate Feature = "TestAlpha"
 	const testBetaGate Feature = "TestBeta"
+	const testLockedTrueGate Feature = "TestLockedTrue"
+	const testLockedFalseGate Feature = "TestLockedFalse"
 
 	tests := []struct {
 		name        string
@@ -270,6 +272,39 @@ func TestFeatureGateSetFromMap(t *testing.T) {
 			},
 			setmapError: "unrecognized feature gate:",
 		},
+		{
+			name: "set locked gates",
+			setmap: map[string]bool{
+				"TestLockedTrue":  true,
+				"TestLockedFalse": false,
+			},
+			expect: map[Feature]bool{
+				testAlphaGate: false,
+				testBetaGate:  false,
+			},
+		},
+		{
+			name: "set locked gates",
+			setmap: map[string]bool{
+				"TestLockedTrue": false,
+			},
+			expect: map[Feature]bool{
+				testAlphaGate: false,
+				testBetaGate:  false,
+			},
+			setmapError: "cannot set feature gate TestLockedTrue to false, feature is locked to true",
+		},
+		{
+			name: "set locked gates",
+			setmap: map[string]bool{
+				"TestLockedFalse": true,
+			},
+			expect: map[Feature]bool{
+				testAlphaGate: false,
+				testBetaGate:  false,
+			},
+			setmapError: "cannot set feature gate TestLockedFalse to true, feature is locked to false",
+		},
 	}
 	for i, test := range tests {
 		t.Run(fmt.Sprintf("SetFromMap %s", test.name), func(t *testing.T) {
@@ -277,10 +312,14 @@ func TestFeatureGateSetFromMap(t *testing.T) {
 			f.Add(map[Feature]FeatureSpec{
 				testAlphaGate:       {Default: false, PreRelease: Alpha},
 				testBetaGate:        {Default: false, PreRelease: Beta},
+				testLockedTrueGate:  {Default: true, PreRelease: GA, LockToDefault: true},
+				testLockedFalseGate: {Default: false, PreRelease: GA, LockToDefault: true},
 			})
 			err := f.SetFromMap(test.setmap)
 			if test.setmapError != "" {
-				if !strings.Contains(err.Error(), test.setmapError) {
+				if err == nil {
+					t.Errorf("expected error, got none")
+				} else if !strings.Contains(err.Error(), test.setmapError) {
 					t.Errorf("%d: SetFromMap(%#v) Expected err:%v, Got err:%v", i, test.setmap, test.setmapError, err)
 				}
 			} else if err != nil {

test/integration/scheduler/volume_binding_test.go

@@ -97,7 +97,6 @@ type testPVC struct {
 }
 
 func TestVolumeBinding(t *testing.T) {
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PersistentLocalVolumes, true)()
 	config := setupCluster(t, "volume-scheduling-", 2, 0, 0)
 	defer config.teardown()
@@ -268,7 +267,6 @@ func TestVolumeBinding(t *testing.T) {
 
 // TestVolumeBindingRescheduling tests scheduler will retry scheduling when needed.
 func TestVolumeBindingRescheduling(t *testing.T) {
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PersistentLocalVolumes, true)()
 	config := setupCluster(t, "volume-scheduling-", 2, 0, 0)
 	defer config.teardown()
@@ -412,7 +410,6 @@ func TestVolumeBindingDynamicStressSlow(t *testing.T) {
 }
 
 func testVolumeBindingStress(t *testing.T, schedulerResyncPeriod time.Duration, dynamic bool, provisionDelaySeconds int) {
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PersistentLocalVolumes, true)()
 	config := setupCluster(t, "volume-binding-stress-", 1, schedulerResyncPeriod, provisionDelaySeconds)
 	defer config.teardown()
@@ -502,7 +499,6 @@ func testVolumeBindingStress(t *testing.T, schedulerResyncPeriod time.Duration,
 }
 
 func testVolumeBindingWithAffinity(t *testing.T, anti bool, numNodes, numPods, numPVsFirstNode int) {
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PersistentLocalVolumes, true)()
 	config := setupCluster(t, "volume-pod-affinity-", numNodes, 0, 0)
 	defer config.teardown()
@@ -629,7 +625,6 @@ func TestVolumeBindingWithAffinity(t *testing.T) {
 }
 
 func TestPVAffinityConflict(t *testing.T) {
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PersistentLocalVolumes, true)()
 	config := setupCluster(t, "volume-scheduling-", 3, 0, 0)
 	defer config.teardown()
@@ -690,7 +685,6 @@ func TestPVAffinityConflict(t *testing.T) {
 }
 
 func TestVolumeProvision(t *testing.T) {
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.PersistentLocalVolumes, true)()
 	config := setupCluster(t, "volume-scheduling", 1, 0, 0)
 	defer config.teardown()
@@ -830,7 +824,6 @@ func TestVolumeProvision(t *testing.T) {
 // on provision failure.
 func TestRescheduleProvisioning(t *testing.T) {
 	// Set feature gates
-	defer utilfeaturetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeScheduling, true)()
 	controllerCh := make(chan struct{})
 
 	context := initTestMaster(t, "reschedule-volume-provision", nil)