LockToDefault the ExternalPolicyForExternalIP feature gate

Author: knabben

pkg/features/kube_features.go

@@ -734,7 +734,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	ImmutableEphemeralVolumes:                      {Default: true, PreRelease: featuregate.Beta},
 	DefaultIngressClass:                            {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.20
 	HugePageStorageMediumSize:                      {Default: true, PreRelease: featuregate.Beta},
-	ExternalPolicyForExternalIP:                    {Default: true, PreRelease: featuregate.GA}, // remove in 1.20
+	ExternalPolicyForExternalIP:                    {Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.22
 	AnyVolumeDataSource:                            {Default: false, PreRelease: featuregate.Alpha},
 	DefaultPodTopologySpread:                       {Default: false, PreRelease: featuregate.Alpha},
 	SetHostnameAsFQDN:                              {Default: false, PreRelease: featuregate.Alpha},

pkg/proxy/iptables/BUILD

@@ -39,7 +39,6 @@ go_test(
     srcs = ["proxier_test.go"],
     embed = [":go_default_library"],
     deps = [
-        "//pkg/features:go_default_library",
         "//pkg/proxy:go_default_library",
         "//pkg/proxy/healthcheck:go_default_library",
         "//pkg/proxy/util:go_default_library",
@@ -54,8 +53,6 @@ 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/intstr:go_default_library",
-        "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
-        "//staging/src/k8s.io/component-base/featuregate/testing:go_default_library",
         "//vendor/github.com/stretchr/testify/assert:go_default_library",
         "//vendor/k8s.io/klog/v2:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",

pkg/proxy/iptables/proxier.go

@@ -1105,7 +1105,7 @@ func (proxier *Proxier) syncProxyRules() {
 
 				destChain := svcXlbChain
 				// We have to SNAT packets to external IPs if externalTrafficPolicy is cluster.
-				if !(utilfeature.DefaultFeatureGate.Enabled(features.ExternalPolicyForExternalIP) && svcInfo.OnlyNodeLocalEndpoints()) {
+				if !svcInfo.OnlyNodeLocalEndpoints() {
 					destChain = svcChain
 					writeLine(proxier.natRules, append(args, "-j", string(KubeMarkMasqChain))...)
 				}

pkg/proxy/iptables/proxier_test.go

@@ -34,9 +34,6 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/intstr"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/proxy"
 	"k8s.io/kubernetes/pkg/proxy/healthcheck"
 	utilproxy "k8s.io/kubernetes/pkg/proxy/util"
@@ -841,9 +838,6 @@ func TestExternalIPsReject(t *testing.T) {
 }
 
 func TestOnlyLocalExternalIPs(t *testing.T) {
-	// TODO(freehan): remove this in k8s 1.19
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExternalPolicyForExternalIP, true)()
-
 	ipt := iptablestest.NewFake()
 	fp := NewFakeProxier(ipt, false)
 	svcIP := "10.20.30.41"

pkg/proxy/ipvs/BUILD

@@ -15,7 +15,6 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
-        "//pkg/features:go_default_library",
         "//pkg/proxy:go_default_library",
         "//pkg/proxy/healthcheck:go_default_library",
         "//pkg/proxy/ipvs/testing:go_default_library",
@@ -35,8 +34,6 @@ go_test(
         "//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/intstr: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/component-base/featuregate/testing:go_default_library",
         "//vendor/github.com/stretchr/testify/assert:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",
         "//vendor/k8s.io/utils/exec/testing:go_default_library",

pkg/proxy/ipvs/proxier.go

@@ -1263,7 +1263,7 @@ func (proxier *Proxier) syncProxyRules() {
 				SetType:  utilipset.HashIPPort,
 			}
 
-			if utilfeature.DefaultFeatureGate.Enabled(features.ExternalPolicyForExternalIP) && svcInfo.OnlyNodeLocalEndpoints() {
+			if svcInfo.OnlyNodeLocalEndpoints() {
 				if valid := proxier.ipsetList[kubeExternalIPLocalSet].validateEntry(entry); !valid {
 					klog.Errorf("%s", fmt.Sprintf(EntryInvalidErr, entry, proxier.ipsetList[kubeExternalIPLocalSet].Name))
 					continue
@@ -1293,10 +1293,7 @@ func (proxier *Proxier) syncProxyRules() {
 				activeIPVSServices[serv.String()] = true
 				activeBindAddrs[serv.Address.String()] = true
 
-				onlyNodeLocalEndpoints := false
-				if utilfeature.DefaultFeatureGate.Enabled(features.ExternalPolicyForExternalIP) {
-					onlyNodeLocalEndpoints = svcInfo.OnlyNodeLocalEndpoints()
-				}
+				onlyNodeLocalEndpoints := svcInfo.OnlyNodeLocalEndpoints()
 				if err := proxier.syncEndpoint(svcName, onlyNodeLocalEndpoints, serv); err != nil {
 					klog.Errorf("Failed to sync endpoint for service: %v, err: %v", serv, err)
 				}

pkg/proxy/ipvs/proxier_test.go

@@ -33,9 +33,6 @@ import (
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/intstr"
 	"k8s.io/apimachinery/pkg/util/sets"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/proxy"
 	"k8s.io/kubernetes/pkg/proxy/healthcheck"
 	netlinktest "k8s.io/kubernetes/pkg/proxy/ipvs/testing"
@@ -1265,9 +1262,6 @@ func TestExternalIPs(t *testing.T) {
 }
 
 func TestOnlyLocalExternalIPs(t *testing.T) {
-	// TODO(freehan): remove this in k8s 1.19
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ExternalPolicyForExternalIP, true)()
-
 	ipt := iptablestest.NewFake()
 	ipvs := ipvstest.NewFake()
 	ipset := ipsettest.NewFake(testIPSetVersion)