Add annotation with values hash to re-create listener

charts/gha-runner-scale-set/templates/autoscalingrunnerset.yaml

@@ -13,6 +13,7 @@ metadata:
     app.kubernetes.io/component: "autoscaling-runner-set"
     {{- include "gha-runner-scale-set.labels" . | nindent 4 }}
   annotations:
+    actions.github.com/values-hash: {{ toJson .Values | sha256sum | trunc 63 }}
     {{- $containerMode := .Values.containerMode }}
     {{- if not (kindIs "string" .Values.githubConfigSecret) }}
     actions.github.com/cleanup-github-secret-name: {{ include "gha-runner-scale-set.githubsecret" . }}

charts/gha-runner-scale-set/tests/template_test.go

@@ -2088,3 +2088,58 @@ func TestRunnerContainerVolumeNotEmptyMap(t *testing.T) {
 	_, ok := m.Spec.Template.Spec.Containers[0]["volumeMounts"]
 	assert.False(t, ok, "volumeMounts should not be set")
 }
+
+func TestAutoscalingRunnerSetAnnotationValuesHash(t *testing.T) {
+	t.Parallel()
+
+	const valuesHash = "actions.github.com/values-hash"
+
+	// Path to the helm chart we will test
+	helmChartPath, err := filepath.Abs("../../gha-runner-scale-set")
+	require.NoError(t, err)
+
+	releaseName := "test-runners"
+	namespaceName := "test-" + strings.ToLower(random.UniqueId())
+
+	options := &helm.Options{
+		Logger: logger.Discard,
+		SetValues: map[string]string{
+			"githubConfigUrl":                    "https://github.com/actions",
+			"githubConfigSecret.github_token":    "gh_token12345",
+			"controllerServiceAccount.name":      "arc",
+			"controllerServiceAccount.namespace": "arc-system",
+		},
+		KubectlOptions: k8s.NewKubectlOptions("", "", namespaceName),
+	}
+
+	output := helm.RenderTemplate(t, options, helmChartPath, releaseName, []string{"templates/autoscalingrunnerset.yaml"})
+
+	var autoscalingRunnerSet v1alpha1.AutoscalingRunnerSet
+	helm.UnmarshalK8SYaml(t, output, &autoscalingRunnerSet)
+
+	firstHash := autoscalingRunnerSet.Annotations["actions.github.com/values-hash"]
+	assert.NotEmpty(t, firstHash)
+	assert.LessOrEqual(t, len(firstHash), 63)
+
+	helmChartPath, err = filepath.Abs("../../gha-runner-scale-set")
+	require.NoError(t, err)
+
+	options = &helm.Options{
+		Logger: logger.Discard,
+		SetValues: map[string]string{
+			"githubConfigUrl":                    "https://github.com/actions",
+			"githubConfigSecret.github_token":    "gh_token1234567890",
+			"controllerServiceAccount.name":      "arc",
+			"controllerServiceAccount.namespace": "arc-system",
+		},
+		KubectlOptions: k8s.NewKubectlOptions("", "", namespaceName),
+	}
+
+	output = helm.RenderTemplate(t, options, helmChartPath, releaseName, []string{"templates/autoscalingrunnerset.yaml"})
+
+	helm.UnmarshalK8SYaml(t, output, &autoscalingRunnerSet)
+	secondHash := autoscalingRunnerSet.Annotations[valuesHash]
+	assert.NotEmpty(t, secondHash)
+	assert.NotEqual(t, firstHash, secondHash)
+	assert.LessOrEqual(t, len(secondHash), 63)
+}

controllers/actions.github.com/autoscalingrunnerset_controller.go

@@ -42,7 +42,12 @@ import (
 )
 
 const (
-	labelKeyRunnerSpecHash            = "runner-spec-hash"
+	annotationKeyRunnerSpecHash = "actions.github.com/runner-spec-hash"
+	// annotationKeyValuesHash is hash of the entire values json.
+	// This is used to determine if the values have changed, so we can
+	// re-create listener.
+	annotationKeyValuesHash = "actions.github.com/values-hash"
+
 	autoscalingRunnerSetFinalizerName = "autoscalingrunnerset.actions.github.com/finalizer"
 	runnerScaleSetIdAnnotationKey     = "runner-scale-set-id"
 )
@@ -230,9 +235,8 @@ func (r *AutoscalingRunnerSetReconciler) Reconcile(ctx context.Context, req ctrl
 		return r.createEphemeralRunnerSet(ctx, autoscalingRunnerSet, log)
 	}
 
-	desiredSpecHash := autoscalingRunnerSet.RunnerSetSpecHash()
 	for _, runnerSet := range existingRunnerSets.all() {
-		log.Info("Find existing ephemeral runner set", "name", runnerSet.Name, "specHash", runnerSet.Labels[labelKeyRunnerSpecHash])
+		log.Info("Find existing ephemeral runner set", "name", runnerSet.Name, "specHash", runnerSet.Annotations[annotationKeyRunnerSpecHash])
 	}
 
 	// Make sure the AutoscalingListener is up and running in the controller namespace
@@ -249,7 +253,9 @@ func (r *AutoscalingRunnerSetReconciler) Reconcile(ctx context.Context, req ctrl
 	}
 
 	// Our listener pod is out of date, so we need to delete it to get a new recreate.
-	if listenerFound && (listener.Labels[labelKeyRunnerSpecHash] != autoscalingRunnerSet.ListenerSpecHash()) {
+	listenerValuesHashChanged := listener.Annotations[annotationKeyValuesHash] != autoscalingRunnerSet.Annotations[annotationKeyValuesHash]
+	listenerSpecHashChanged := listener.Annotations[annotationKeyRunnerSpecHash] != autoscalingRunnerSet.ListenerSpecHash()
+	if listenerFound && (listenerValuesHashChanged || listenerSpecHashChanged) {
 		log.Info("RunnerScaleSetListener is out of date. Deleting it so that it is recreated", "name", listener.Name)
 		if err := r.Delete(ctx, listener); err != nil {
 			if kerrors.IsNotFound(err) {
@@ -263,7 +269,7 @@ func (r *AutoscalingRunnerSetReconciler) Reconcile(ctx context.Context, req ctrl
 		return ctrl.Result{}, nil
 	}
 
-	if desiredSpecHash != latestRunnerSet.Labels[labelKeyRunnerSpecHash] {
+	if latestRunnerSet.Annotations[annotationKeyRunnerSpecHash] != autoscalingRunnerSet.RunnerSetSpecHash() {
 		if r.drainingJobs(&latestRunnerSet.Status) {
 			log.Info("Latest runner set spec hash does not match the current autoscaling runner set. Waiting for the running and pending runners to finish:", "running", latestRunnerSet.Status.RunningEphemeralRunners, "pending", latestRunnerSet.Status.PendingEphemeralRunners)
 			log.Info("Scaling down the number of desired replicas to 0")

controllers/actions.github.com/autoscalingrunnerset_controller_test.go

@@ -280,6 +280,10 @@ var _ = Describe("Test AutoScalingRunnerSet controller", Ordered, func() {
 			// This should trigger re-creation of EphemeralRunnerSet and Listener
 			patched := autoscalingRunnerSet.DeepCopy()
 			patched.Spec.Template.Spec.PriorityClassName = "test-priority-class"
+			if patched.ObjectMeta.Annotations == nil {
+				patched.ObjectMeta.Annotations = make(map[string]string)
+			}
+			patched.ObjectMeta.Annotations[annotationKeyValuesHash] = "test-hash"
 			err = k8sClient.Patch(ctx, patched, client.MergeFrom(autoscalingRunnerSet))
 			Expect(err).NotTo(HaveOccurred(), "failed to patch AutoScalingRunnerSet")
 			autoscalingRunnerSet = patched.DeepCopy()
@@ -297,10 +301,10 @@ var _ = Describe("Test AutoScalingRunnerSet controller", Ordered, func() {
 						return "", fmt.Errorf("We should have only 1 EphemeralRunnerSet, but got %v", len(runnerSetList.Items))
 					}
 
-					return runnerSetList.Items[0].Labels[labelKeyRunnerSpecHash], nil
+					return runnerSetList.Items[0].Annotations[annotationKeyRunnerSpecHash], nil
 				},
 				autoscalingRunnerSetTestTimeout,
-				autoscalingRunnerSetTestInterval).ShouldNot(BeEquivalentTo(runnerSet.Labels[labelKeyRunnerSpecHash]), "New EphemeralRunnerSet should be created")
+				autoscalingRunnerSetTestInterval).ShouldNot(BeEquivalentTo(runnerSet.Annotations[annotationKeyRunnerSpecHash]), "New EphemeralRunnerSet should be created")
 
 			// We should create a new listener
 			Eventually(
@@ -334,6 +338,55 @@ var _ = Describe("Test AutoScalingRunnerSet controller", Ordered, func() {
 			err = k8sClient.Patch(ctx, patched, client.MergeFrom(autoscalingRunnerSet))
 			Expect(err).NotTo(HaveOccurred(), "failed to patch AutoScalingRunnerSet")
 
+			// We should not re-create a new EphemeralRunnerSet
+			Consistently(
+				func() (string, error) {
+					runnerSetList := new(v1alpha1.EphemeralRunnerSetList)
+					err := k8sClient.List(ctx, runnerSetList, client.InNamespace(autoscalingRunnerSet.Namespace))
+					if err != nil {
+						return "", err
+					}
+
+					if len(runnerSetList.Items) != 1 {
+						return "", fmt.Errorf("We should have only 1 EphemeralRunnerSet, but got %v", len(runnerSetList.Items))
+					}
+
+					return string(runnerSetList.Items[0].UID), nil
+				},
+				autoscalingRunnerSetTestTimeout,
+				autoscalingRunnerSetTestInterval).Should(BeEquivalentTo(string(runnerSet.UID)), "New EphemeralRunnerSet should not be created")
+
+			// We should only re-create a new listener
+			Eventually(
+				func() (string, error) {
+					listener := new(v1alpha1.AutoscalingListener)
+					err := k8sClient.Get(ctx, client.ObjectKey{Name: scaleSetListenerName(autoscalingRunnerSet), Namespace: autoscalingRunnerSet.Namespace}, listener)
+					if err != nil {
+						return "", err
+					}
+
+					return string(listener.UID), nil
+				},
+				autoscalingRunnerSetTestTimeout,
+				autoscalingRunnerSetTestInterval).ShouldNot(BeEquivalentTo(string(listener.UID)), "New Listener should be created")
+
+			// Only update the values hash for the autoscaling runner set
+			// This should trigger re-creation of the Listener only
+			runnerSetList = new(v1alpha1.EphemeralRunnerSetList)
+			err = k8sClient.List(ctx, runnerSetList, client.InNamespace(autoscalingRunnerSet.Namespace))
+			Expect(err).NotTo(HaveOccurred(), "failed to list EphemeralRunnerSet")
+			Expect(len(runnerSetList.Items)).To(Equal(1), "There should be 1 EphemeralRunnerSet")
+			runnerSet = runnerSetList.Items[0]
+
+			listener = new(v1alpha1.AutoscalingListener)
+			err = k8sClient.Get(ctx, client.ObjectKey{Name: scaleSetListenerName(autoscalingRunnerSet), Namespace: autoscalingRunnerSet.Namespace}, listener)
+			Expect(err).NotTo(HaveOccurred(), "failed to get Listener")
+
+			patched = autoscalingRunnerSet.DeepCopy()
+			patched.ObjectMeta.Annotations[annotationKeyValuesHash] = "hash-changes"
+			err = k8sClient.Patch(ctx, patched, client.MergeFrom(autoscalingRunnerSet))
+			Expect(err).NotTo(HaveOccurred(), "failed to patch AutoScalingRunnerSet")
+
 			// We should not re-create a new EphemeralRunnerSet
 			Consistently(
 				func() (string, error) {
@@ -493,6 +546,10 @@ var _ = Describe("Test AutoScalingRunnerSet controller", Ordered, func() {
 			// Patch the AutoScalingRunnerSet image which should trigger
 			// the recreation of the Listener and EphemeralRunnerSet
 			patched := autoscalingRunnerSet.DeepCopy()
+			if patched.ObjectMeta.Annotations == nil {
+				patched.ObjectMeta.Annotations = make(map[string]string)
+			}
+			patched.ObjectMeta.Annotations[annotationKeyValuesHash] = "testgroup2"
 			patched.Spec.Template.Spec = corev1.PodSpec{
 				Containers: []corev1.Container{
 					{
@@ -501,7 +558,6 @@ var _ = Describe("Test AutoScalingRunnerSet controller", Ordered, func() {
 					},
 				},
 			}
-			// patched.Spec.Template.Spec.PriorityClassName = "test-priority-class"
 			err = k8sClient.Patch(ctx, patched, client.MergeFrom(autoscalingRunnerSet))
 			Expect(err).NotTo(HaveOccurred(), "failed to patch AutoScalingRunnerSet")
 			autoscalingRunnerSet = patched.DeepCopy()

controllers/actions.github.com/resourcebuilder.go

@@ -91,7 +91,11 @@ func (b *resourceBuilder) newAutoScalingListener(autoscalingRunnerSet *v1alpha1.
 		LabelKeyKubernetesPartOf:        labelValueKubernetesPartOf,
 		LabelKeyKubernetesComponent:     "runner-scale-set-listener",
 		LabelKeyKubernetesVersion:       autoscalingRunnerSet.Labels[LabelKeyKubernetesVersion],
-		labelKeyRunnerSpecHash:          autoscalingRunnerSet.ListenerSpecHash(),
+	}
+
+	annotations := map[string]string{
+		annotationKeyRunnerSpecHash: autoscalingRunnerSet.ListenerSpecHash(),
+		annotationKeyValuesHash:     autoscalingRunnerSet.Annotations[annotationKeyValuesHash],
 	}
 
 	if err := applyGitHubURLLabels(autoscalingRunnerSet.Spec.GitHubConfigUrl, labels); err != nil {
@@ -100,9 +104,10 @@ func (b *resourceBuilder) newAutoScalingListener(autoscalingRunnerSet *v1alpha1.
 
 	autoscalingListener := &v1alpha1.AutoscalingListener{
 		ObjectMeta: metav1.ObjectMeta{
-			Name:      scaleSetListenerName(autoscalingRunnerSet),
-			Namespace: namespace,
-			Labels:    labels,
+			Name:        scaleSetListenerName(autoscalingRunnerSet),
+			Namespace:   namespace,
+			Labels:      labels,
+			Annotations: annotations,
 		},
 		Spec: v1alpha1.AutoscalingListenerSpec{
 			GitHubConfigUrl:               autoscalingRunnerSet.Spec.GitHubConfigUrl,
@@ -498,7 +503,6 @@ func (b *resourceBuilder) newEphemeralRunnerSet(autoscalingRunnerSet *v1alpha1.A
 	runnerSpecHash := autoscalingRunnerSet.RunnerSetSpecHash()
 
 	labels := map[string]string{
-		labelKeyRunnerSpecHash:          runnerSpecHash,
 		LabelKeyKubernetesPartOf:        labelValueKubernetesPartOf,
 		LabelKeyKubernetesComponent:     "runner-set",
 		LabelKeyKubernetesVersion:       autoscalingRunnerSet.Labels[LabelKeyKubernetesVersion],
@@ -511,8 +515,10 @@ func (b *resourceBuilder) newEphemeralRunnerSet(autoscalingRunnerSet *v1alpha1.A
 	}
 
 	newAnnotations := map[string]string{
+
 		AnnotationKeyGitHubRunnerGroupName:    autoscalingRunnerSet.Annotations[AnnotationKeyGitHubRunnerGroupName],
 		AnnotationKeyGitHubRunnerScaleSetName: autoscalingRunnerSet.Annotations[AnnotationKeyGitHubRunnerScaleSetName],
+		annotationKeyRunnerSpecHash:           runnerSpecHash,
 	}
 
 	newEphemeralRunnerSet := &v1alpha1.EphemeralRunnerSet{

controllers/actions.github.com/resourcebuilder_test.go

@@ -39,7 +39,7 @@ func TestLabelPropagation(t *testing.T) {
 	assert.Equal(t, labelValueKubernetesPartOf, ephemeralRunnerSet.Labels[LabelKeyKubernetesPartOf])
 	assert.Equal(t, "runner-set", ephemeralRunnerSet.Labels[LabelKeyKubernetesComponent])
 	assert.Equal(t, autoscalingRunnerSet.Labels[LabelKeyKubernetesVersion], ephemeralRunnerSet.Labels[LabelKeyKubernetesVersion])
-	assert.NotEmpty(t, ephemeralRunnerSet.Labels[labelKeyRunnerSpecHash])
+	assert.NotEmpty(t, ephemeralRunnerSet.Annotations[annotationKeyRunnerSpecHash])
 	assert.Equal(t, autoscalingRunnerSet.Name, ephemeralRunnerSet.Labels[LabelKeyGitHubScaleSetName])
 	assert.Equal(t, autoscalingRunnerSet.Namespace, ephemeralRunnerSet.Labels[LabelKeyGitHubScaleSetNamespace])
 	assert.Equal(t, "", ephemeralRunnerSet.Labels[LabelKeyGitHubEnterprise])
@@ -53,7 +53,7 @@ func TestLabelPropagation(t *testing.T) {
 	assert.Equal(t, labelValueKubernetesPartOf, listener.Labels[LabelKeyKubernetesPartOf])
 	assert.Equal(t, "runner-scale-set-listener", listener.Labels[LabelKeyKubernetesComponent])
 	assert.Equal(t, autoscalingRunnerSet.Labels[LabelKeyKubernetesVersion], listener.Labels[LabelKeyKubernetesVersion])
-	assert.NotEmpty(t, ephemeralRunnerSet.Labels[labelKeyRunnerSpecHash])
+	assert.NotEmpty(t, ephemeralRunnerSet.Annotations[annotationKeyRunnerSpecHash])
 	assert.Equal(t, autoscalingRunnerSet.Name, listener.Labels[LabelKeyGitHubScaleSetName])
 	assert.Equal(t, autoscalingRunnerSet.Namespace, listener.Labels[LabelKeyGitHubScaleSetNamespace])
 	assert.Equal(t, "", listener.Labels[LabelKeyGitHubEnterprise])