Merge pull request kubernetes#84351 from wojtek-t/promote_node_lease_to_GA

Promote node lease to GA

Author: k8s-ci-robot

cmd/kubelet/app/server.go

@@ -576,13 +576,12 @@ func run(s *options.KubeletServer, kubeDeps *kubelet.Dependencies, stopCh <-chan
 		// make a separate client for heartbeat with throttling disabled and a timeout attached
 		heartbeatClientConfig := *clientConfig
 		heartbeatClientConfig.Timeout = s.KubeletConfiguration.NodeStatusUpdateFrequency.Duration
-		// if the NodeLease feature is enabled, the timeout is the minimum of the lease duration and status update frequency
-		if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) {
-			leaseTimeout := time.Duration(s.KubeletConfiguration.NodeLeaseDurationSeconds) * time.Second
-			if heartbeatClientConfig.Timeout > leaseTimeout {
-				heartbeatClientConfig.Timeout = leaseTimeout
-			}
+		// The timeout is the minimum of the lease duration and status update frequency
+		leaseTimeout := time.Duration(s.KubeletConfiguration.NodeLeaseDurationSeconds) * time.Second
+		if heartbeatClientConfig.Timeout > leaseTimeout {
+			heartbeatClientConfig.Timeout = leaseTimeout
 		}
+
 		heartbeatClientConfig.QPS = float32(-1)
 		kubeDeps.HeartbeatClient, err = clientset.NewForConfig(&heartbeatClientConfig)
 		if err != nil {

cmd/kubemark/BUILD

@@ -17,7 +17,6 @@ go_library(
     importpath = "k8s.io/kubernetes/cmd/kubemark",
     deps = [
         "//pkg/api/legacyscheme:go_default_library",
-        "//pkg/features:go_default_library",
         "//pkg/kubelet/cadvisor/testing:go_default_library",
         "//pkg/kubelet/cm:go_default_library",
         "//pkg/kubelet/dockershim:go_default_library",
@@ -28,7 +27,6 @@ go_library(
         "//pkg/util/sysctl/testing:go_default_library",
         "//staging/src/k8s.io/api/core/v1: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/client-go/kubernetes:go_default_library",
         "//staging/src/k8s.io/client-go/rest:go_default_library",
         "//staging/src/k8s.io/client-go/tools/clientcmd:go_default_library",

cmd/kubemark/hollow-node.go

@@ -30,7 +30,6 @@ import (
 
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/util/sets"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	clientset "k8s.io/client-go/kubernetes"
 	restclient "k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/clientcmd"
@@ -42,7 +41,6 @@ import (
 	"k8s.io/component-base/version"
 	"k8s.io/component-base/version/verflag"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
-	"k8s.io/kubernetes/pkg/features"
 	cadvisortest "k8s.io/kubernetes/pkg/kubelet/cadvisor/testing"
 	"k8s.io/kubernetes/pkg/kubelet/cm"
 	"k8s.io/kubernetes/pkg/kubelet/dockershim"
@@ -180,13 +178,12 @@ func run(config *hollowNodeConfig) {
 
 		heartbeatClientConfig := *clientConfig
 		heartbeatClientConfig.Timeout = c.NodeStatusUpdateFrequency.Duration
-		// if the NodeLease feature is enabled, the timeout is the minimum of the lease duration and status update frequency
-		if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) {
-			leaseTimeout := time.Duration(c.NodeLeaseDurationSeconds) * time.Second
-			if heartbeatClientConfig.Timeout > leaseTimeout {
-				heartbeatClientConfig.Timeout = leaseTimeout
-			}
+		// The timeout is the minimum of the lease duration and status update frequency
+		leaseTimeout := time.Duration(c.NodeLeaseDurationSeconds) * time.Second
+		if heartbeatClientConfig.Timeout > leaseTimeout {
+			heartbeatClientConfig.Timeout = leaseTimeout
 		}
+
 		heartbeatClientConfig.QPS = float32(-1)
 		heartbeatClient, err := clientset.NewForConfig(&heartbeatClientConfig)
 		if err != nil {

pkg/controller/nodelifecycle/node_lifecycle_controller.go

@@ -55,7 +55,6 @@ import (
 	"k8s.io/kubernetes/pkg/controller"
 	"k8s.io/kubernetes/pkg/controller/nodelifecycle/scheduler"
 	nodeutil "k8s.io/kubernetes/pkg/controller/util/node"
-	"k8s.io/kubernetes/pkg/features"
 	kubefeatures "k8s.io/kubernetes/pkg/features"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	utilnode "k8s.io/kubernetes/pkg/util/node"
@@ -537,12 +536,7 @@ func NewNodeLifecycleController(
 	})
 
 	nc.leaseLister = leaseInformer.Lister()
-	if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) {
-		nc.leaseInformerSynced = leaseInformer.Informer().HasSynced
-	} else {
-		// Always indicate that lease is synced to prevent syncing lease.
-		nc.leaseInformerSynced = func() bool { return true }
-	}
+	nc.leaseInformerSynced = leaseInformer.Informer().HasSynced
 
 	nc.nodeLister = nodeInformer.Lister()
 	nc.nodeInformerSynced = nodeInformer.Informer().HasSynced
@@ -1103,17 +1097,14 @@ func (nc *Controller) tryUpdateNodeHealth(node *v1.Node) (time.Duration, v1.Node
 			readyTransitionTimestamp: transitionTime,
 		}
 	}
-	var observedLease *coordv1.Lease
-	if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) {
-		// Always update the probe time if node lease is renewed.
-		// Note: If kubelet never posted the node status, but continues renewing the
-		// heartbeat leases, the node controller will assume the node is healthy and
-		// take no action.
-		observedLease, _ = nc.leaseLister.Leases(v1.NamespaceNodeLease).Get(node.Name)
-		if observedLease != nil && (savedLease == nil || savedLease.Spec.RenewTime.Before(observedLease.Spec.RenewTime)) {
-			nodeHealth.lease = observedLease
-			nodeHealth.probeTimestamp = nc.now()
-		}
+	// Always update the probe time if node lease is renewed.
+	// Note: If kubelet never posted the node status, but continues renewing the
+	// heartbeat leases, the node controller will assume the node is healthy and
+	// take no action.
+	observedLease, _ := nc.leaseLister.Leases(v1.NamespaceNodeLease).Get(node.Name)
+	if observedLease != nil && (savedLease == nil || savedLease.Spec.RenewTime.Before(observedLease.Spec.RenewTime)) {
+		nodeHealth.lease = observedLease
+		nodeHealth.probeTimestamp = nc.now()
 	}
 
 	if nc.now().After(nodeHealth.probeTimestamp.Add(gracePeriod)) {

pkg/controller/nodelifecycle/node_lifecycle_controller_test.go

@@ -1747,8 +1747,6 @@ func TestMonitorNodeHealthUpdateStatus(t *testing.T) {
 }
 
 func TestMonitorNodeHealthUpdateNodeAndPodStatusWithLease(t *testing.T) {
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.NodeLease, true)()
-
 	nodeCreationTime := metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC)
 	fakeNow := metav1.Date(2015, 1, 1, 12, 0, 0, 0, time.UTC)
 	testcases := []struct {

pkg/features/kube_features.go

@@ -335,6 +335,7 @@ const (
 	// owner: @mtaufen
 	// alpha: v1.12
 	// beta:  v1.14
+	// GA: v1.17
 	//
 	// Kubelet uses the new Lease API to report node heartbeats,
 	// (Kube) Node Lifecycle Controller uses these heartbeats as a node health signal.
@@ -555,7 +556,7 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 	CSIBlockVolume:                 {Default: true, PreRelease: featuregate.Beta},
 	CSIInlineVolume:                {Default: true, PreRelease: featuregate.Beta},
 	RuntimeClass:                   {Default: true, PreRelease: featuregate.Beta},
-	NodeLease:                      {Default: true, PreRelease: featuregate.Beta},
+	NodeLease:                      {Default: true, PreRelease: featuregate.GA, LockToDefault: true},
 	SCTPSupport:                    {Default: false, PreRelease: featuregate.Alpha},
 	VolumeSnapshotDataSource:       {Default: false, PreRelease: featuregate.Alpha},
 	ProcMountType:                  {Default: false, PreRelease: featuregate.Alpha},

pkg/kubelet/kubelet.go

@@ -873,13 +873,10 @@ func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
 	klet.appArmorValidator = apparmor.NewValidator(containerRuntime)
 	klet.softAdmitHandlers.AddPodAdmitHandler(lifecycle.NewAppArmorAdmitHandler(klet.appArmorValidator))
 	klet.softAdmitHandlers.AddPodAdmitHandler(lifecycle.NewNoNewPrivsAdmitHandler(klet.containerRuntime))
-
-	if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) {
-		klet.nodeLeaseController = nodelease.NewController(klet.clock, klet.heartbeatClient, string(klet.nodeName), kubeCfg.NodeLeaseDurationSeconds, klet.onRepeatedHeartbeatFailure)
-	}
-
 	klet.softAdmitHandlers.AddPodAdmitHandler(lifecycle.NewProcMountAdmitHandler(klet.containerRuntime))
 
+	klet.nodeLeaseController = nodelease.NewController(klet.clock, klet.heartbeatClient, string(klet.nodeName), kubeCfg.NodeLeaseDurationSeconds, klet.onRepeatedHeartbeatFailure)
+
 	// Finally, put the most recent version of the config on the Kubelet, so
 	// people can see how it was configured.
 	klet.kubeletConfiguration = *kubeCfg
@@ -1420,9 +1417,7 @@ func (kl *Kubelet) Run(updates <-chan kubetypes.PodUpdate) {
 		go kl.fastStatusUpdateOnce()
 
 		// start syncing lease
-		if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) {
-			go kl.nodeLeaseController.Run(wait.NeverStop)
-		}
+		go kl.nodeLeaseController.Run(wait.NeverStop)
 	}
 	go wait.Until(kl.updateRuntimeUp, 5*time.Second, wait.NeverStop)
 

pkg/kubelet/kubelet_node_status.go

@@ -434,7 +434,7 @@ func (kl *Kubelet) tryUpdateNodeStatus(tryNumber int) error {
 	kl.setNodeStatus(node)
 
 	now := kl.clock.Now()
-	if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) && now.Before(kl.lastStatusReportTime.Add(kl.nodeStatusReportFrequency)) {
+	if now.Before(kl.lastStatusReportTime.Add(kl.nodeStatusReportFrequency)) {
 		if !podCIDRChanged && !nodeStatusHasChanged(&originalNode.Status, &node.Status) {
 			// We must mark the volumes as ReportedInUse in volume manager's dsw even
 			// if no changes were made to the node status (no volumes were added or removed

pkg/kubelet/kubelet_node_status_test.go

@@ -43,14 +43,11 @@ import (
 	"k8s.io/apimachinery/pkg/util/strategicpatch"
 	"k8s.io/apimachinery/pkg/util/uuid"
 	"k8s.io/apimachinery/pkg/util/wait"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/kubernetes/fake"
 	"k8s.io/client-go/rest"
 	core "k8s.io/client-go/testing"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
 	"k8s.io/component-base/version"
-	"k8s.io/kubernetes/pkg/features"
 	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
 	cadvisortest "k8s.io/kubernetes/pkg/kubelet/cadvisor/testing"
 	"k8s.io/kubernetes/pkg/kubelet/cm"
@@ -786,8 +783,6 @@ func TestUpdateNodeStatusError(t *testing.T) {
 }
 
 func TestUpdateNodeStatusWithLease(t *testing.T) {
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.NodeLease, true)()
-
 	testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
 	defer testKubelet.Cleanup()
 	clock := testKubelet.fakeClock
@@ -1020,116 +1015,7 @@ func TestUpdateNodeStatusWithLease(t *testing.T) {
 	assert.IsType(t, core.GetActionImpl{}, actions[9])
 }
 
-func TestUpdateNodeStatusAndVolumesInUseWithoutNodeLease(t *testing.T) {
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.NodeLease, false)()
-
-	cases := []struct {
-		desc                  string
-		existingVolumes       []v1.UniqueVolumeName // volumes to initially populate volumeManager
-		existingNode          *v1.Node              // existing node object
-		expectedNode          *v1.Node              // new node object after patch
-		expectedReportedInUse []v1.UniqueVolumeName // expected volumes reported in use in volumeManager
-	}{
-		{
-			desc:         "no volumes and no update",
-			existingNode: &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname}},
-			expectedNode: &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname}},
-		},
-		{
-			desc:            "volumes inuse on node and volumeManager",
-			existingVolumes: []v1.UniqueVolumeName{"vol1"},
-			existingNode: &v1.Node{
-				ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname},
-				Status: v1.NodeStatus{
-					VolumesInUse: []v1.UniqueVolumeName{"vol1"},
-				},
-			},
-			expectedNode: &v1.Node{
-				ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname},
-				Status: v1.NodeStatus{
-					VolumesInUse: []v1.UniqueVolumeName{"vol1"},
-				},
-			},
-			expectedReportedInUse: []v1.UniqueVolumeName{"vol1"},
-		},
-		{
-			desc: "volumes inuse on node but not in volumeManager",
-			existingNode: &v1.Node{
-				ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname},
-				Status: v1.NodeStatus{
-					VolumesInUse: []v1.UniqueVolumeName{"vol1"},
-				},
-			},
-			expectedNode: &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname}},
-		},
-		{
-			desc:            "volumes inuse in volumeManager but not on node",
-			existingVolumes: []v1.UniqueVolumeName{"vol1"},
-			existingNode:    &v1.Node{ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname}},
-			expectedNode: &v1.Node{
-				ObjectMeta: metav1.ObjectMeta{Name: testKubeletHostname},
-				Status: v1.NodeStatus{
-					VolumesInUse: []v1.UniqueVolumeName{"vol1"},
-				},
-			},
-			expectedReportedInUse: []v1.UniqueVolumeName{"vol1"},
-		},
-	}
-
-	for _, tc := range cases {
-		t.Run(tc.desc, func(t *testing.T) {
-			// Setup
-			testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
-			defer testKubelet.Cleanup()
-
-			kubelet := testKubelet.kubelet
-			kubelet.kubeClient = nil // ensure only the heartbeat client is used
-			kubelet.containerManager = &localCM{ContainerManager: cm.NewStubContainerManager()}
-			kubelet.lastStatusReportTime = kubelet.clock.Now()
-			kubelet.nodeStatusReportFrequency = time.Hour
-			kubelet.machineInfo = &cadvisorapi.MachineInfo{}
-
-			// override test volumeManager
-			fakeVolumeManager := kubeletvolume.NewFakeVolumeManager(tc.existingVolumes)
-			kubelet.volumeManager = fakeVolumeManager
-
-			// Only test VolumesInUse setter
-			kubelet.setNodeStatusFuncs = []func(*v1.Node) error{
-				nodestatus.VolumesInUse(kubelet.volumeManager.ReconcilerStatesHasBeenSynced,
-					kubelet.volumeManager.GetVolumesInUse),
-			}
-
-			kubeClient := testKubelet.fakeKubeClient
-			kubeClient.ReactionChain = fake.NewSimpleClientset(&v1.NodeList{Items: []v1.Node{*tc.existingNode}}).ReactionChain
-
-			// Execute
-			assert.NoError(t, kubelet.updateNodeStatus())
-
-			// Validate
-			actions := kubeClient.Actions()
-			if tc.expectedNode != nil {
-				assert.Len(t, actions, 2)
-				assert.IsType(t, core.GetActionImpl{}, actions[0])
-				assert.IsType(t, core.PatchActionImpl{}, actions[1])
-				patchAction := actions[1].(core.PatchActionImpl)
-
-				updatedNode, err := applyNodeStatusPatch(tc.existingNode, patchAction.GetPatch())
-				require.NoError(t, err)
-				assert.True(t, apiequality.Semantic.DeepEqual(tc.expectedNode, updatedNode), "%s", diff.ObjectDiff(tc.expectedNode, updatedNode))
-			} else {
-				assert.Len(t, actions, 1)
-				assert.IsType(t, core.GetActionImpl{}, actions[0])
-			}
-
-			reportedInUse := fakeVolumeManager.GetVolumesReportedInUse()
-			assert.True(t, apiequality.Semantic.DeepEqual(tc.expectedReportedInUse, reportedInUse), "%s", diff.ObjectDiff(tc.expectedReportedInUse, reportedInUse))
-		})
-	}
-}
-
 func TestUpdateNodeStatusAndVolumesInUseWithNodeLease(t *testing.T) {
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.NodeLease, true)()
-
 	cases := []struct {
 		desc                  string
 		existingVolumes       []v1.UniqueVolumeName // volumes to initially populate volumeManager

pkg/master/controller.go

@@ -30,11 +30,9 @@ import (
 	"k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
 	genericapiserver "k8s.io/apiserver/pkg/server"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/client-go/rest"
 	"k8s.io/klog"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/master/reconcilers"
 	"k8s.io/kubernetes/pkg/registry/core/rangeallocation"
 	corerest "k8s.io/kubernetes/pkg/registry/core/rest"
@@ -92,10 +90,7 @@ func (c *completedConfig) NewBootstrapController(legacyRESTStorage corerest.Lega
 		klog.Fatalf("failed to get listener address: %v", err)
 	}
 
-	systemNamespaces := []string{metav1.NamespaceSystem, metav1.NamespacePublic}
-	if utilfeature.DefaultFeatureGate.Enabled(features.NodeLease) {
-		systemNamespaces = append(systemNamespaces, corev1.NamespaceNodeLease)
-	}
+	systemNamespaces := []string{metav1.NamespaceSystem, metav1.NamespacePublic, corev1.NamespaceNodeLease}
 
 	return &Controller{
 		ServiceClient:   serviceClient,