remove feature-gate StableLoadBalancerNodeSet

pkg/features/kube_features.go

@@ -772,15 +772,6 @@ const (
 	// Enables kubelet support to size memory backed volumes
 	SizeMemoryBackedVolumes featuregate.Feature = "SizeMemoryBackedVolumes"
 
-	// owner: @alexanderConstantinescu
-	// kep: http://kep.k8s.io/3458
-	// beta: v1.27
-	// GA: v1.30
-	//
-	// Enables less load balancer re-configurations by the service controller
-	// (KCCM) as an effect of changing node state.
-	StableLoadBalancerNodeSet featuregate.Feature = "StableLoadBalancerNodeSet"
-
 	// owner: @mattcary
 	// alpha: v1.22
 	// beta: v1.27
@@ -1183,8 +1174,6 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	SizeMemoryBackedVolumes: {Default: true, PreRelease: featuregate.Beta},
 
-	StableLoadBalancerNodeSet: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // GA in 1.30, remove in 1.32
-
 	StatefulSetAutoDeletePVC: {Default: true, PreRelease: featuregate.Beta},
 
 	StatefulSetStartOrdinal: {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // GA in 1.31, remove in 1.33

staging/src/k8s.io/cloud-provider/controllers/service/controller.go

@@ -30,7 +30,6 @@ 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"
 	coreinformers "k8s.io/client-go/informers/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/kubernetes/scheme"
@@ -44,7 +43,6 @@ import (
 	servicehelper "k8s.io/cloud-provider/service/helpers"
 	"k8s.io/component-base/featuregate"
 	controllersmetrics "k8s.io/component-base/metrics/prometheus/controllers"
-	"k8s.io/controller-manager/pkg/features"
 	"k8s.io/klog/v2"
 )
 
@@ -439,7 +437,7 @@ func (c *Controller) syncLoadBalancerIfNeeded(ctx context.Context, service *v1.S
 }
 
 func (c *Controller) ensureLoadBalancer(ctx context.Context, service *v1.Service) (*v1.LoadBalancerStatus, error) {
-	nodes, err := listWithPredicates(c.nodeLister, getNodePredicatesForService(service)...)
+	nodes, err := listWithPredicates(c.nodeLister, stableNodeSetPredicates...)
 	if err != nil {
 		return nil, err
 	}
@@ -701,12 +699,9 @@ func loggableNodeNames(nodes []*v1.Node) []string {
 
 func shouldSyncUpdatedNode(oldNode, newNode *v1.Node) bool {
 	// Evaluate the individual node exclusion predicate before evaluating the
-	// compounded result of all predicates. We don't sync changes on the
-	// readiness condition for eTP:Local services or when
-	// StableLoadBalancerNodeSet is enabled, hence if a node remains NotReady
-	// and a user adds the exclusion label we will need to sync as to make sure
-	// this change is reflected correctly on ETP=local services. The sync
-	// function compares lastSyncedNodes with the new (existing) set of nodes
+	// compounded result of all predicates.
+	//
+	// The sync function compares lastSyncedNodes with the new (existing) set of nodes
 	// for each service, so services which are synced with the same set of nodes
 	// should be skipped internally in the sync function. This is needed as to
 	// trigger a global sync for all services and make sure no service gets
@@ -718,9 +713,7 @@ func shouldSyncUpdatedNode(oldNode, newNode *v1.Node) bool {
 	if oldNode.Spec.ProviderID != newNode.Spec.ProviderID {
 		return true
 	}
-	if !utilfeature.DefaultFeatureGate.Enabled(features.StableLoadBalancerNodeSet) {
-		return respectsPredicates(oldNode, allNodePredicates...) != respectsPredicates(newNode, allNodePredicates...)
-	}
+
 	return false
 }
 
@@ -760,8 +753,8 @@ func (c *Controller) nodeSyncService(svc *v1.Service) bool {
 		nodeSyncErrorCount.Inc()
 		return retNeedRetry
 	}
-	newNodes = filterWithPredicates(newNodes, getNodePredicatesForService(svc)...)
-	oldNodes := filterWithPredicates(c.getLastSyncedNodes(svc), getNodePredicatesForService(svc)...)
+	newNodes = filterWithPredicates(newNodes, stableNodeSetPredicates...)
+	oldNodes := filterWithPredicates(c.getLastSyncedNodes(svc), stableNodeSetPredicates...)
 	// Store last synced nodes without actually determining if we successfully
 	// synced them or not. Failed node syncs are passed off to retries in the
 	// service queue, so no need to wait. If we don't store it now, we risk
@@ -1011,11 +1004,7 @@ var (
 		nodeUnTaintedPredicate,
 		nodeReadyPredicate,
 	}
-	etpLocalNodePredicates []NodeConditionPredicate = []NodeConditionPredicate{
-		nodeIncludedPredicate,
-		nodeUnTaintedPredicate,
-		nodeReadyPredicate,
-	}
+
 	stableNodeSetPredicates []NodeConditionPredicate = []NodeConditionPredicate{
 		nodeNotDeletedPredicate,
 		nodeIncludedPredicate,
@@ -1028,16 +1017,6 @@ var (
 	}
 )
 
-func getNodePredicatesForService(service *v1.Service) []NodeConditionPredicate {
-	if utilfeature.DefaultFeatureGate.Enabled(features.StableLoadBalancerNodeSet) {
-		return stableNodeSetPredicates
-	}
-	if service.Spec.ExternalTrafficPolicy == v1.ServiceExternalTrafficPolicyLocal {
-		return etpLocalNodePredicates
-	}
-	return allNodePredicates
-}
-
 // We consider the node for load balancing only when the node is not labelled for exclusion.
 func nodeIncludedPredicate(node *v1.Node) bool {
 	_, hasExcludeBalancerLabel := node.Labels[v1.LabelNodeExcludeBalancers]

staging/src/k8s.io/controller-manager/pkg/features/kube_features.go

@@ -37,15 +37,6 @@ const (
 	// alpha: v1.27
 	// Enable webhook in cloud controller manager
 	CloudControllerManagerWebhook featuregate.Feature = "CloudControllerManagerWebhook"
-
-	// owner: @alexanderConstantinescu
-	// kep: http://kep.k8s.io/3458
-	// beta: v1.27
-	// GA: v1.30
-	//
-	// Enables less load balancer re-configurations by the service controller
-	// (KCCM) as an effect of changing node state.
-	StableLoadBalancerNodeSet featuregate.Feature = "StableLoadBalancerNodeSet"
 )
 
 func SetupCurrentKubernetesSpecificFeatureGates(featuregates featuregate.MutableFeatureGate) error {
@@ -56,5 +47,4 @@ func SetupCurrentKubernetesSpecificFeatureGates(featuregates featuregate.Mutable
 // To add a new feature, define a key for it at k8s.io/api/pkg/features and add it here.
 var cloudPublicFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
 	CloudControllerManagerWebhook: {Default: false, PreRelease: featuregate.Alpha},
-	StableLoadBalancerNodeSet:     {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // GA in 1.30, remove in 1.31
 }

test/featuregates_linter/test_data/unversioned_feature_list.yaml

@@ -760,12 +760,6 @@
     lockToDefault: false
     preRelease: Beta
     version: ""
-- name: StableLoadBalancerNodeSet
-  versionedSpecs:
-  - default: true
-    lockToDefault: true
-    preRelease: GA
-    version: ""
 - name: StatefulSetAutoDeletePVC
   versionedSpecs:
   - default: true