KEP-4193: Promote ServiceAccountTokenJTI, ServiceAccountTokenPodNodeInfo, ServiceAccountTokenNodeBindingValidation to stable

pkg/features/versioned_kube_features.go

@@ -639,6 +639,7 @@ var defaultVersionedKubernetesFeatureGates = map[featuregate.Feature]featuregate
 	ServiceAccountTokenJTI: {
 		{Version: version.MustParse("1.29"), Default: false, PreRelease: featuregate.Alpha},
 		{Version: version.MustParse("1.30"), Default: true, PreRelease: featuregate.Beta},
+		{Version: version.MustParse("1.32"), Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.34
 	},
 
 	ServiceAccountTokenNodeBinding: {
@@ -649,11 +650,13 @@ var defaultVersionedKubernetesFeatureGates = map[featuregate.Feature]featuregate
 	ServiceAccountTokenNodeBindingValidation: {
 		{Version: version.MustParse("1.29"), Default: false, PreRelease: featuregate.Alpha},
 		{Version: version.MustParse("1.30"), Default: true, PreRelease: featuregate.Beta},
+		{Version: version.MustParse("1.32"), Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.34
 	},
 
 	ServiceAccountTokenPodNodeInfo: {
 		{Version: version.MustParse("1.29"), Default: false, PreRelease: featuregate.Alpha},
 		{Version: version.MustParse("1.30"), Default: true, PreRelease: featuregate.Beta},
+		{Version: version.MustParse("1.32"), Default: true, PreRelease: featuregate.GA, LockToDefault: true}, // remove in 1.34
 	},
 
 	ServiceTrafficDistribution: {

pkg/kubeapiserver/options/authentication_test.go

@@ -43,7 +43,6 @@ import (
 	"k8s.io/component-base/featuregate"
 	featuregatetesting "k8s.io/component-base/featuregate/testing"
 	openapicommon "k8s.io/kube-openapi/pkg/common"
-	kubefeatures "k8s.io/kubernetes/pkg/features"
 	kubeauthenticator "k8s.io/kubernetes/pkg/kubeapiserver/authenticator"
 	"k8s.io/kubernetes/pkg/serviceaccount"
 	"k8s.io/utils/pointer"
@@ -237,12 +236,6 @@ func TestAuthenticationValidate(t *testing.T) {
 			},
 			expectErr: "authentication-config file and oidc-* flags are mutually exclusive",
 		},
-		{
-			name:             "fails to validate if ServiceAccountTokenNodeBindingValidation is disabled and ServiceAccountTokenNodeBinding is enabled",
-			enabledFeatures:  []featuregate.Feature{kubefeatures.ServiceAccountTokenNodeBinding},
-			disabledFeatures: []featuregate.Feature{kubefeatures.ServiceAccountTokenNodeBindingValidation},
-			expectErr:        "the \"ServiceAccountTokenNodeBinding\" feature gate can only be enabled if the \"ServiceAccountTokenNodeBindingValidation\" feature gate is also enabled",
-		},
 		{
 			name:                         "test when authentication config file and anonymous-auth flags are set AnonymousAuthConfigurableEndpoints disabled",
 			disabledFeatures:             []featuregate.Feature{features.AnonymousAuthConfigurableEndpoints},
@@ -489,7 +482,6 @@ func TestBuiltInAuthenticationOptionsAddFlags(t *testing.T) {
 }
 
 func TestWithTokenGetterFunction(t *testing.T) {
-	featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, kubefeatures.ServiceAccountTokenNodeBindingValidation, false)
 	fakeClientset := fake.NewSimpleClientset()
 	versionedInformer := informers.NewSharedInformerFactory(fakeClientset, 0)
 	{

pkg/serviceaccount/claims_test.go

@@ -89,7 +89,7 @@ func TestClaims(t *testing.T) {
 		sc *jwt.Claims
 		pc *privateClaims
 
-		featureJTI, featurePodNodeInfo, featureNodeBinding bool
+		featureNodeBinding bool
 	}{
 		{
 			// pod and secret
@@ -115,6 +115,7 @@ func TestClaims(t *testing.T) {
 				IssuedAt:  jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				NotBefore: jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				Expiry:    jwt.NewNumericDate(time.Unix(1514764800+100, 0)),
+				ID:        "fixed",
 			},
 			pc: &privateClaims{
 				Kubernetes: kubernetes{
@@ -138,6 +139,7 @@ func TestClaims(t *testing.T) {
 				IssuedAt:  jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				NotBefore: jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				Expiry:    jwt.NewNumericDate(time.Unix(1514764800+100, 0)),
+				ID:        "fixed",
 			},
 			pc: &privateClaims{
 				Kubernetes: kubernetes{
@@ -160,6 +162,7 @@ func TestClaims(t *testing.T) {
 				IssuedAt:  jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				NotBefore: jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				Expiry:    jwt.NewNumericDate(time.Unix(1514764800+100, 0)),
+				ID:        "fixed",
 			},
 			pc: &privateClaims{
 				Kubernetes: kubernetes{
@@ -182,6 +185,7 @@ func TestClaims(t *testing.T) {
 				IssuedAt:  jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				NotBefore: jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				Expiry:    jwt.NewNumericDate(time.Unix(1514764800+60*60*24, 0)),
+				ID:        "fixed",
 			},
 			pc: &privateClaims{
 				Kubernetes: kubernetes{
@@ -202,30 +206,6 @@ func TestClaims(t *testing.T) {
 			aud: nil,
 			err: "token bound to Node object requested, but \"ServiceAccountTokenNodeBinding\" feature gate is disabled",
 		},
-		{
-			// node & pod with feature gate disabled
-			sa:   sa,
-			node: node,
-			pod:  pod,
-			// really fast
-			exp: 0,
-			// nil audience
-			aud: nil,
-
-			sc: &jwt.Claims{
-				Subject:   "system:serviceaccount:myns:mysvcacct",
-				IssuedAt:  jwt.NewNumericDate(time.Unix(1514764800, 0)),
-				NotBefore: jwt.NewNumericDate(time.Unix(1514764800, 0)),
-				Expiry:    jwt.NewNumericDate(time.Unix(1514764800, 0)),
-			},
-			pc: &privateClaims{
-				Kubernetes: kubernetes{
-					Namespace: "myns",
-					Pod:       &ref{Name: "mypod", UID: "mypod-uid"},
-					Svcacct:   ref{Name: "mysvcacct", UID: "mysvcacct-uid"},
-				},
-			},
-		},
 		{
 			// node alone
 			sa:   sa,
@@ -242,6 +222,7 @@ func TestClaims(t *testing.T) {
 				IssuedAt:  jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				NotBefore: jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				Expiry:    jwt.NewNumericDate(time.Unix(1514764800, 0)),
+				ID:        "fixed",
 			},
 			pc: &privateClaims{
 				Kubernetes: kubernetes{
@@ -256,8 +237,6 @@ func TestClaims(t *testing.T) {
 			sa:   sa,
 			pod:  pod,
 			node: node,
-			// enable embedding pod node info feature
-			featurePodNodeInfo: true,
 			// really fast
 			exp: 0,
 			// nil audience
@@ -268,6 +247,7 @@ func TestClaims(t *testing.T) {
 				IssuedAt:  jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				NotBefore: jwt.NewNumericDate(time.Unix(1514764800, 0)),
 				Expiry:    jwt.NewNumericDate(time.Unix(1514764800, 0)),
+				ID:        "fixed",
 			},
 			pc: &privateClaims{
 				Kubernetes: kubernetes{
@@ -294,8 +274,6 @@ func TestClaims(t *testing.T) {
 		{
 			// ensure JTI is set
 			sa: sa,
-			// enable setting JTI feature
-			featureJTI: true,
 			// really fast
 			exp: 0,
 			// nil audience
@@ -342,9 +320,7 @@ func TestClaims(t *testing.T) {
 			}
 
 			// set feature flags for the duration of the test case
-			featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceAccountTokenJTI, c.featureJTI)
 			featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceAccountTokenNodeBinding, c.featureNodeBinding)
-			featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceAccountTokenPodNodeInfo, c.featurePodNodeInfo)
 
 			sc, pc, err := Claims(c.sa, c.pod, c.sec, c.node, c.exp, c.warnafter, c.aud)
 			if err != nil && err.Error() != c.err {
@@ -376,8 +352,6 @@ type claimTestCase struct {
 	expiry    jwt.NumericDate
 	notBefore jwt.NumericDate
 	expectErr string
-
-	featureNodeBindingValidation bool
 }
 
 func TestValidatePrivateClaims(t *testing.T) {
@@ -458,11 +432,10 @@ func TestValidatePrivateClaims(t *testing.T) {
 			expectErr: "service account token has been invalidated",
 		},
 		{
-			name:                         "missing node",
-			getter:                       fakeGetter{serviceAccount, nil, nil, nil},
-			private:                      &privateClaims{Kubernetes: kubernetes{Svcacct: ref{Name: "saname", UID: "sauid"}, Node: &ref{Name: "nodename", UID: "nodeuid"}, Namespace: "ns"}},
-			expectErr:                    "service account token has been invalidated",
-			featureNodeBindingValidation: true,
+			name:      "missing node",
+			getter:    fakeGetter{serviceAccount, nil, nil, nil},
+			private:   &privateClaims{Kubernetes: kubernetes{Svcacct: ref{Name: "saname", UID: "sauid"}, Node: &ref{Name: "nodename", UID: "nodeuid"}, Namespace: "ns"}},
+			expectErr: "service account token has been invalidated",
 		},
 		{
 			name:      "different uid serviceaccount",
@@ -522,11 +495,10 @@ func TestValidatePrivateClaims(t *testing.T) {
 				expectErr: deletedErr,
 			},
 			claimTestCase{
-				name:                         deletionTestCase.name + " node",
-				getter:                       fakeGetter{serviceAccount, nil, nil, deletedNode},
-				private:                      &privateClaims{Kubernetes: kubernetes{Svcacct: ref{Name: "saname", UID: "sauid"}, Node: &ref{Name: "nodename", UID: "nodeuid"}, Namespace: "ns"}},
-				expectErr:                    deletedErr,
-				featureNodeBindingValidation: true,
+				name:      deletionTestCase.name + " node",
+				getter:    fakeGetter{serviceAccount, nil, nil, deletedNode},
+				private:   &privateClaims{Kubernetes: kubernetes{Svcacct: ref{Name: "saname", UID: "sauid"}, Node: &ref{Name: "nodename", UID: "nodeuid"}, Namespace: "ns"}},
+				expectErr: deletedErr,
 			},
 		)
 	}
@@ -539,8 +511,6 @@ func TestValidatePrivateClaims(t *testing.T) {
 				expiry = tc.expiry
 			}
 
-			featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceAccountTokenNodeBindingValidation, tc.featureNodeBindingValidation)
-
 			_, err := v.Validate(context.Background(), "", &jwt.Claims{Expiry: &expiry, NotBefore: &tc.notBefore}, tc.private)
 			if len(tc.expectErr) > 0 {
 				if errStr := errString(err); tc.expectErr != errStr {

test/e2e/auth/per_node_update.go

@@ -24,6 +24,7 @@ import (
 
 	g "github.com/onsi/ginkgo/v2"
 	o "github.com/onsi/gomega"
+
 	admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
 	authenticationv1 "k8s.io/api/authentication/v1"
 	v1 "k8s.io/api/core/v1"
@@ -34,7 +35,6 @@ import (
 	"k8s.io/client-go/kubernetes"
 	cgoscheme "k8s.io/client-go/kubernetes/scheme"
 	"k8s.io/client-go/rest"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/test/e2e/framework"
 	e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
 	imageutils "k8s.io/kubernetes/test/utils/image"
@@ -52,7 +52,7 @@ var (
 	perNodeCheckValidatingAdmissionPolicyBinding string
 )
 
-var _ = SIGDescribe("ValidatingAdmissionPolicy", framework.WithFeatureGate(features.ServiceAccountTokenNodeBindingValidation), func() {
+var _ = SIGDescribe("ValidatingAdmissionPolicy", func() {
 	defer g.GinkgoRecover()
 	f := framework.NewDefaultFramework("node-authn")
 	f.NamespacePodSecurityLevel = admissionapi.LevelRestricted

test/e2e/auth/service_accounts.go

@@ -100,6 +100,12 @@ var _ = SIGDescribe("ServiceAccounts", func() {
 		framework.ExpectNoError(err)
 		framework.ExpectNoError(e2epod.WaitForPodRunningInNamespace(ctx, f.ClientSet, pod))
 
+		// Read the running pod to get the current node name
+		pod, err = f.ClientSet.CoreV1().Pods(f.Namespace.Name).Get(ctx, pod.Name, metav1.GetOptions{})
+		framework.ExpectNoError(err)
+		node, err := f.ClientSet.CoreV1().Nodes().Get(ctx, pod.Spec.NodeName, metav1.GetOptions{})
+		framework.ExpectNoError(err)
+
 		tk := e2ekubectl.NewTestKubeconfig(framework.TestContext.CertDir, framework.TestContext.Host, framework.TestContext.KubeConfig, framework.TestContext.KubeContext, framework.TestContext.KubectlPath, f.Namespace.Name)
 		mountedToken, err := tk.ReadFileViaContainer(pod.Name, pod.Spec.Containers[0].Name, path.Join(serviceaccount.DefaultAPITokenMountPath, v1.ServiceAccountTokenKey))
 		framework.ExpectNoError(err)
@@ -133,6 +139,29 @@ var _ = SIGDescribe("ServiceAccounts", func() {
 		if !groups.Has("system:serviceaccounts:" + f.Namespace.Name) {
 			framework.Failf("expected system:serviceaccounts:%s group, had %v", f.Namespace.Name, groups.List())
 		}
+
+		credentialID, ok := tokenReview.Status.User.Extra["authentication.kubernetes.io/credential-id"]
+		if !ok || len(credentialID) != 1 || !strings.HasPrefix(credentialID[0], "JTI=") {
+			framework.Failf("expected single authentication.kubernetes.io/credential-id extra info item starting with 'JTI=', got %v", credentialID)
+		}
+
+		podName, ok := tokenReview.Status.User.Extra["authentication.kubernetes.io/pod-name"]
+		if !ok || len(podName) != 1 || podName[0] != pod.Name {
+			framework.Failf("expected single authentication.kubernetes.io/pod-name extra info item matching %v, got %v", pod.Name, podName)
+		}
+		podUID, ok := tokenReview.Status.User.Extra["authentication.kubernetes.io/pod-uid"]
+		if !ok || len(podUID) != 1 || podUID[0] != string(pod.UID) {
+			framework.Failf("expected single authentication.kubernetes.io/pod-uid extra info item matching %v, got %v", pod.UID, podUID)
+		}
+
+		nodeName, ok := tokenReview.Status.User.Extra["authentication.kubernetes.io/node-name"]
+		if !ok || len(nodeName) != 1 || nodeName[0] != node.Name {
+			framework.Failf("expected single authentication.kubernetes.io/node-name extra info item matching %v, got %v", node.Name, nodeName)
+		}
+		nodeUID, ok := tokenReview.Status.User.Extra["authentication.kubernetes.io/node-uid"]
+		if !ok || len(nodeUID) != 1 || nodeUID[0] != string(node.UID) {
+			framework.Failf("expected single authentication.kubernetes.io/node-uid extra info item matching %v, got %v", node.UID, nodeUID)
+		}
 	})
 
 	/*

test/featuregates_linter/test_data/versioned_feature_list.yaml

@@ -1036,6 +1036,10 @@
     lockToDefault: false
     preRelease: Beta
     version: "1.30"
+  - default: true
+    lockToDefault: true
+    preRelease: GA
+    version: "1.32"
 - name: ServiceAccountTokenNodeBinding
   versionedSpecs:
   - default: false
@@ -1056,6 +1060,10 @@
     lockToDefault: false
     preRelease: Beta
     version: "1.30"
+  - default: true
+    lockToDefault: true
+    preRelease: GA
+    version: "1.32"
 - name: ServiceAccountTokenPodNodeInfo
   versionedSpecs:
   - default: false
@@ -1066,6 +1074,10 @@
     lockToDefault: false
     preRelease: Beta
     version: "1.30"
+  - default: true
+    lockToDefault: true
+    preRelease: GA
+    version: "1.32"
 - name: ServiceTrafficDistribution
   versionedSpecs:
   - default: false

test/integration/auth/svcaccttoken_test.go

@@ -248,8 +248,6 @@ func TestServiceAccountTokenCreate(t *testing.T) {
 	})
 
 	t.Run("bound to service account and pod", func(t *testing.T) {
-		// Disable embedding pod's node info
-		featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceAccountTokenPodNodeInfo, false)
 		treq := &authenticationv1.TokenRequest{
 			Spec: authenticationv1.TokenRequestSpec{
 				Audiences: []string{"api"},