Remove feature gate CustomResourceValidationExpressions.

cluster/gce/config-default.sh

@@ -265,7 +265,7 @@ fi
 RUN_CCM_CONTROLLERS="${RUN_CCM_CONTROLLERS:-*,-gkenetworkparamset}"
 
 # List of the set of feature gates recognized by the GCP CCM
-export CCM_FEATURE_GATES="APIPriorityAndFairness,APIResponseCompression,APIServerIdentity,APIServerTracing,AllAlpha,AllBeta,CustomResourceValidationExpressions,KMSv2,OpenAPIEnums,OpenAPIV3,ServerSideFieldValidation,StorageVersionAPI,StorageVersionHash"
+export CCM_FEATURE_GATES="APIPriorityAndFairness,APIResponseCompression,APIServerIdentity,APIServerTracing,AllAlpha,AllBeta,KMSv2,OpenAPIEnums,OpenAPIV3,ServerSideFieldValidation,StorageVersionAPI,StorageVersionHash"
 
 # Optional: set feature gates
 # shellcheck disable=SC2034 # Variables sourced in other scripts.

cluster/gce/config-test.sh

@@ -316,7 +316,7 @@ if [[ -n "${NODE_ACCELERATORS}" ]]; then
 fi
 
 # List of the set of feature gates recognized by the GCP CCM
-export CCM_FEATURE_GATES="APIPriorityAndFairness,APIResponseCompression,APIServerIdentity,APIServerTracing,AllAlpha,AllBeta,CustomResourceValidationExpressions,KMSv2,OpenAPIEnums,OpenAPIV3,ServerSideFieldValidation,StorageVersionAPI,StorageVersionHash"
+export CCM_FEATURE_GATES="APIPriorityAndFairness,APIResponseCompression,APIServerIdentity,APIServerTracing,AllAlpha,AllBeta,KMSv2,OpenAPIEnums,OpenAPIV3,ServerSideFieldValidation,StorageVersionAPI,StorageVersionHash"
 
 # Optional: Install cluster DNS.
 # Set CLUSTER_DNS_CORE_DNS to 'false' to install kube-dns instead of CoreDNS.

pkg/features/kube_features.go

@@ -1236,8 +1236,6 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	genericfeatures.ConsistentListFromCache: {Default: true, PreRelease: featuregate.Beta},
 
-	genericfeatures.CustomResourceValidationExpressions: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.31
-
 	genericfeatures.EfficientWatchResumption: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
 
 	genericfeatures.KMSv1: {Default: false, PreRelease: featuregate.Deprecated},

staging/src/k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/types_jsonschema.go

@@ -144,7 +144,6 @@ type JSONSchemaProps struct {
 	XMapType *string
 
 	// x-kubernetes-validations -kubernetes-validations describes a list of validation rules written in the CEL expression language.
-	// This field is an alpha-level. Using this field requires the feature gate `CustomResourceValidationExpressions` to be enabled.
 	// +patchMergeKey=rule
 	// +patchStrategy=merge
 	// +listType=map

staging/src/k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1/types_jsonschema.go

@@ -189,7 +189,6 @@ type JSONSchemaProps struct {
 	XMapType *string `json:"x-kubernetes-map-type,omitempty" protobuf:"bytes,43,opt,name=xKubernetesMapType"`
 
 	// x-kubernetes-validations describes a list of validation rules written in the CEL expression language.
-	// This field is an alpha-level. Using this field requires the feature gate `CustomResourceValidationExpressions` to be enabled.
 	// +patchMergeKey=rule
 	// +patchStrategy=merge
 	// +listType=map

staging/src/k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1/types_jsonschema.go

@@ -189,7 +189,6 @@ type JSONSchemaProps struct {
 	XMapType *string `json:"x-kubernetes-map-type,omitempty" protobuf:"bytes,43,opt,name=xKubernetesMapType"`
 
 	// x-kubernetes-validations describes a list of validation rules written in the CEL expression language.
-	// This field is an alpha-level. Using this field requires the feature gate `CustomResourceValidationExpressions` to be enabled.
 	// +patchMergeKey=rule
 	// +patchStrategy=merge
 	// +listType=map

staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresource/strategy.go

@@ -44,7 +44,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/validation/field"
 	celconfig "k8s.io/apiserver/pkg/apis/cel"
 	"k8s.io/apiserver/pkg/cel/common"
-	"k8s.io/apiserver/pkg/features"
 	"k8s.io/apiserver/pkg/registry/generic"
 	apiserverstorage "k8s.io/apiserver/pkg/storage"
 	"k8s.io/apiserver/pkg/storage/names"
@@ -76,9 +75,7 @@ type selectableField struct {
 
 func NewStrategy(typer runtime.ObjectTyper, namespaceScoped bool, kind schema.GroupVersionKind, schemaValidator, statusSchemaValidator validation.SchemaValidator, structuralSchema *structuralschema.Structural, status *apiextensions.CustomResourceSubresourceStatus, scale *apiextensions.CustomResourceSubresourceScale, selectableFields []v1.SelectableField) customResourceStrategy {
 	var celValidator *cel.Validator
-	if utilfeature.DefaultFeatureGate.Enabled(features.CustomResourceValidationExpressions) {
+	celValidator = cel.NewValidator(structuralSchema, true, celconfig.PerCallLimit) // CEL programs are compiled and cached here
-		celValidator = cel.NewValidator(structuralSchema, true, celconfig.PerCallLimit) // CEL programs are compiled and cached here
-	}
 
 	strategy := customResourceStrategy{
 		ObjectTyper:     typer,

staging/src/k8s.io/apiserver/pkg/features/kube_features.go

@@ -105,15 +105,6 @@ const (
 	// Enables expression validation in Admission Control
 	ValidatingAdmissionPolicy featuregate.Feature = "ValidatingAdmissionPolicy"
 
-	// owner: @cici37
-	// kep: https://kep.k8s.io/2876
-	// alpha: v1.23
-	// beta: v1.25
-	// stable: v1.29
-	//
-	// Enables expression validation for Custom Resource
-	CustomResourceValidationExpressions featuregate.Feature = "CustomResourceValidationExpressions"
-
 	// alpha: v1.20
 	// beta: v1.21
 	// GA: v1.24
@@ -362,8 +353,6 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	ValidatingAdmissionPolicy: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.32
 
-	CustomResourceValidationExpressions: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.31
-
 	EfficientWatchResumption: {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
 
 	KMSv1: {Default: false, PreRelease: featuregate.Deprecated},

test/integration/apiserver/crd_validation_expressions_test.go

@@ -30,12 +30,8 @@ import (
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/apimachinery/pkg/util/json"
-	genericfeatures "k8s.io/apiserver/pkg/features"
 	"k8s.io/apiserver/pkg/storage/names"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"k8s.io/client-go/dynamic"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
-
 	apiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
 	"k8s.io/kubernetes/test/integration/framework"
 )
@@ -43,8 +39,6 @@ import (
 // TestCustomResourceValidators tests x-kubernetes-validations compile and validate as expected when the feature gate
 // is enabled.
 func TestCustomResourceValidators(t *testing.T) {
-	featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, genericfeatures.CustomResourceValidationExpressions, true)
-
 	server, err := apiservertesting.StartTestServer(t, apiservertesting.NewDefaultTestServerOptions(), nil, framework.SharedEtcd())
 	if err != nil {
 		t.Fatal(err)
@@ -426,8 +420,6 @@ func TestCustomResourceValidators(t *testing.T) {
 // TestCustomResourceValidatorsWithBlockingErrors tests x-kubernetes-validations is skipped when
 // blocking errors occurred.
 func TestCustomResourceValidatorsWithBlockingErrors(t *testing.T) {
-	featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, genericfeatures.CustomResourceValidationExpressions, true)
-
 	server, err := apiservertesting.StartTestServer(t, apiservertesting.NewDefaultTestServerOptions(), nil, framework.SharedEtcd())
 	if err != nil {
 		t.Fatal(err)