Create configmap for starting dispatcher pods (#4027) (#4101)

Signed-off-by: Pierangelo Di Pilato <pierdipi@redhat.com>

control-plane/cmd/kafka-controller/main.go

@@ -30,6 +30,7 @@ import (
 	"knative.dev/eventing/pkg/auth"
 	"knative.dev/eventing/pkg/eventingtls"
 
+	"knative.dev/eventing-kafka-broker/control-plane/pkg/apis/internals/kafka/eventing"
 	"knative.dev/eventing-kafka-broker/control-plane/pkg/config"
 	"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka/clientpool"
 	"knative.dev/eventing-kafka-broker/control-plane/pkg/reconciler/broker"
@@ -67,6 +68,7 @@ func main() {
 	ctx = filteredFactory.WithSelectors(ctx,
 		eventingtls.TrustBundleLabelSelector,
 		auth.OIDCLabelSelector,
+		eventing.DispatcherLabelSelectorStr,
 	)
 	ctx = clientpool.WithKafkaClientPool(ctx)
 

control-plane/pkg/apis/internals/kafka/eventing/data_plane.go

@@ -27,6 +27,11 @@ const (
 	ConfigMapVolumeName = "kafka-resources"
 
 	DispatcherVolumeName = "contract-resources"
+
+	DataPlanePodKindLabelKey    = "app.kubernetes.io/kind"
+	DispatcherPodKindLabelValue = "kafka-dispatcher"
+
+	DispatcherLabelSelectorStr = DataPlanePodKindLabelKey + "=" + DispatcherPodKindLabelValue
 )
 
 func ConfigMapNameFromPod(p *corev1.Pod) (string, error) {

control-plane/pkg/apis/internals/kafka/eventing/v1alpha1/register.go

@@ -17,6 +17,8 @@
 package v1alpha1
 
 import (
+	"strings"
+
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
@@ -75,3 +77,16 @@ func IsKnownStatefulSet(name string) bool {
 		name == ChannelStatefulSetName ||
 		name == BrokerStatefulSetName
 }
+
+func GetOwnerKindFromStatefulSetPrefix(name string) (string, bool) {
+	if strings.HasPrefix(name, SourceStatefulSetName) {
+		return "KafkaSource", true
+	}
+	if strings.HasPrefix(name, ChannelStatefulSetName) {
+		return "KafkaChannel", true
+	}
+	if strings.HasPrefix(name, BrokerStatefulSetName) {
+		return "Trigger", true
+	}
+	return "", false
+}

control-plane/pkg/reconciler/consumergroup/controller.go

@@ -27,12 +27,14 @@ import (
 	"go.uber.org/multierr"
 	"go.uber.org/zap"
 	appsv1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apiserver/pkg/storage/names"
 	"k8s.io/client-go/tools/cache"
 
+	"knative.dev/eventing-kafka-broker/control-plane/pkg/apis/internals/kafka/eventing"
 	"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka/clientpool"
 	"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka/offset"
 	"knative.dev/eventing-kafka-broker/control-plane/pkg/prober"
@@ -42,7 +44,7 @@ import (
 	"knative.dev/pkg/client/injection/kube/informers/apps/v1/statefulset"
 	configmapinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/configmap"
 	nodeinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/node"
-	podinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/pod"
+	podinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/pod/filtered"
 	secretinformer "knative.dev/pkg/client/injection/kube/informers/core/v1/secret"
 	"knative.dev/pkg/configmap"
 	"knative.dev/pkg/controller"
@@ -119,13 +121,15 @@ func NewController(ctx context.Context, watcher configmap.Watcher) *controller.I
 
 	clientPool := clientpool.Get(ctx)
 
+	dispatcherPodInformer := podinformer.Get(ctx, eventing.DispatcherLabelSelectorStr)
+
 	r := &Reconciler{
 		SchedulerFunc:                      func(s string) (Scheduler, bool) { sched, ok := schedulers[strings.ToLower(s)]; return sched, ok },
 		ConsumerLister:                     consumer.Get(ctx).Lister(),
 		InternalsClient:                    internalsclient.Get(ctx).InternalV1alpha1(),
 		SecretLister:                       secretinformer.Get(ctx).Lister(),
 		ConfigMapLister:                    configmapinformer.Get(ctx).Lister(),
-		PodLister:                          podinformer.Get(ctx).Lister(),
+		PodLister:                          dispatcherPodInformer.Lister(),
 		KubeClient:                         kubeclient.Get(ctx),
 		NameGenerator:                      names.SimpleNameGenerator,
 		GetKafkaClient:                     clientPool.GetClient,
@@ -195,6 +199,47 @@ func NewController(ctx context.Context, watcher configmap.Watcher) *controller.I
 
 	ResyncOnStatefulSetChange(ctx, globalResync)
 
+	dispatcherPodInformer.Informer().AddEventHandler(controller.HandleAll(func(obj interface{}) {
+		pod, ok := obj.(*corev1.Pod)
+		if !ok {
+			return
+		}
+
+		kind, ok := kafkainternals.GetOwnerKindFromStatefulSetPrefix(pod.Name)
+		if !ok {
+			return
+		}
+
+		cmName, err := eventing.ConfigMapNameFromPod(pod)
+		if err != nil {
+			logger.Warnw("Failed to get ConfigMap name from pod", zap.String("pod", pod.Name), zap.Error(err))
+			return
+		}
+		if err := r.ensureContractConfigMapExists(ctx, pod, cmName); err != nil {
+			logger.Warnw("Failed to ensure ConfigMap for pod exists", zap.String("pod", pod.Name), zap.String("configmap", cmName), zap.Error(err))
+			return
+		}
+
+		impl.FilteredGlobalResync(
+			func(obj interface{}) bool {
+				cg, ok := obj.(*kafkainternals.ConsumerGroup)
+				if !ok {
+					return false
+				}
+
+				uf := cg.GetUserFacingResourceRef()
+				if uf == nil {
+					return false
+				}
+				if strings.EqualFold(kind, uf.Kind) {
+					return true
+				}
+				return false
+			},
+			consumerGroupInformer.Informer(),
+		)
+	}))
+
 	//Todo: ScaledObject informer when KEDA is installed
 
 	return impl

control-plane/pkg/reconciler/consumergroup/controller_test.go

@@ -17,24 +17,30 @@
 package consumergroup
 
 import (
+	"context"
 	"testing"
 
 	"github.com/stretchr/testify/require"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
-	_ "knative.dev/eventing-kafka-broker/control-plane/pkg/client/injection/informers/sources/v1beta1/kafkasource/fake"
-	"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka/clientpool"
 	_ "knative.dev/pkg/client/injection/ducks/duck/v1/addressable/fake"
 	kubeclient "knative.dev/pkg/client/injection/kube/client/fake"
 	_ "knative.dev/pkg/client/injection/kube/informers/apps/v1/statefulset/fake"
 	_ "knative.dev/pkg/client/injection/kube/informers/core/v1/configmap/fake"
 	_ "knative.dev/pkg/client/injection/kube/informers/core/v1/node/fake"
 	_ "knative.dev/pkg/client/injection/kube/informers/core/v1/pod/fake"
+	_ "knative.dev/pkg/client/injection/kube/informers/core/v1/pod/filtered/fake"
 	_ "knative.dev/pkg/client/injection/kube/informers/core/v1/secret/fake"
+	filteredFactory "knative.dev/pkg/client/injection/kube/informers/factory/filtered"
+	_ "knative.dev/pkg/client/injection/kube/informers/factory/filtered/fake"
 	"knative.dev/pkg/configmap"
 	reconcilertesting "knative.dev/pkg/reconciler/testing"
 
+	"knative.dev/eventing-kafka-broker/control-plane/pkg/apis/internals/kafka/eventing"
+	_ "knative.dev/eventing-kafka-broker/control-plane/pkg/client/injection/informers/sources/v1beta1/kafkasource/fake"
+	"knative.dev/eventing-kafka-broker/control-plane/pkg/kafka/clientpool"
+
 	kafkainternals "knative.dev/eventing-kafka-broker/control-plane/pkg/apis/internals/kafka/eventing/v1alpha1"
 	_ "knative.dev/eventing-kafka-broker/control-plane/pkg/client/internals/kafka/injection/informers/eventing/v1alpha1/consumer/fake"
 	_ "knative.dev/eventing-kafka-broker/control-plane/pkg/client/internals/kafka/injection/informers/eventing/v1alpha1/consumergroup/fake"
@@ -55,7 +61,11 @@ const (
 )
 
 func TestNewController(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, func(ctx context.Context) context.Context {
+		return filteredFactory.WithSelectors(ctx,
+			eventing.DispatcherLabelSelectorStr,
+		)
+	})
 	ctx, _ = kedaclient.With(ctx)
 
 	t.Setenv("SYSTEM_NAMESPACE", systemNamespace)

control-plane/pkg/reconciler/consumergroup/evictor_test.go

@@ -17,6 +17,7 @@
 package consumergroup
 
 import (
+	"context"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -26,21 +27,23 @@ import (
 	"k8s.io/utils/pointer"
 	eventingduckv1alpha1 "knative.dev/eventing/pkg/apis/duck/v1alpha1"
 	kubeclient "knative.dev/pkg/client/injection/kube/client/fake"
+	filteredFactory "knative.dev/pkg/client/injection/kube/informers/factory/filtered"
 	reconcilertesting "knative.dev/pkg/reconciler/testing"
 
+	"knative.dev/eventing-kafka-broker/control-plane/pkg/apis/internals/kafka/eventing"
 	kafkainternals "knative.dev/eventing-kafka-broker/control-plane/pkg/apis/internals/kafka/eventing/v1alpha1"
 	_ "knative.dev/eventing-kafka-broker/control-plane/pkg/client/internals/kafka/injection/client/fake"
 	kafkainternalsclient "knative.dev/eventing-kafka-broker/control-plane/pkg/client/internals/kafka/injection/client/fake"
 )
 
 func TestNewEvictor(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	require.NotPanics(t, func() { newEvictor(ctx, zap.String("k", "n")) })
 }
 
 func TestEvictorNilPodNoPanic(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	var pod *corev1.Pod
 
@@ -74,7 +77,7 @@ func TestEvictorNilPodNoPanic(t *testing.T) {
 }
 
 func TestEvictorEvictSuccess(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	pod := &corev1.Pod{
 		ObjectMeta: metav1.ObjectMeta{Namespace: "ns", Name: "name"},
@@ -111,7 +114,7 @@ func TestEvictorEvictSuccess(t *testing.T) {
 }
 
 func TestEvictorNoEvictionEmptyPlacement(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	pod := &corev1.Pod{
 		ObjectMeta: metav1.ObjectMeta{Namespace: "ns", Name: "name"},
@@ -145,7 +148,7 @@ func TestEvictorNoEvictionEmptyPlacement(t *testing.T) {
 }
 
 func TestEvictorNoEviction(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	pod := &corev1.Pod{
 		ObjectMeta: metav1.ObjectMeta{Namespace: "ns", Name: "name"},
@@ -181,7 +184,7 @@ func TestEvictorNoEviction(t *testing.T) {
 }
 
 func TestEvictorEvictSuccessConsumerGroupSchedulingInProgress(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	pod := &corev1.Pod{
 		ObjectMeta: metav1.ObjectMeta{Namespace: "ns", Name: "name"},
@@ -212,7 +215,7 @@ func TestEvictorEvictSuccessConsumerGroupSchedulingInProgress(t *testing.T) {
 }
 
 func TestEvictorEvictPodNotFound(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	pod := &corev1.Pod{
 		ObjectMeta: metav1.ObjectMeta{Namespace: "ns", Name: "name"},
@@ -238,7 +241,7 @@ func TestEvictorEvictPodNotFound(t *testing.T) {
 	require.Nil(t, err)
 }
 func TestEvictorEvictConsumerGroupNotFound(t *testing.T) {
-	ctx, _ := reconcilertesting.SetupFakeContext(t)
+	ctx, _ := reconcilertesting.SetupFakeContext(t, withFilteredSelectors)
 
 	pod := &corev1.Pod{
 		ObjectMeta: metav1.ObjectMeta{Namespace: "ns", Name: "name"},
@@ -263,3 +266,9 @@ func TestEvictorEvictConsumerGroupNotFound(t *testing.T) {
 
 	require.Nil(t, err)
 }
+
+func withFilteredSelectors(ctx context.Context) context.Context {
+	return filteredFactory.WithSelectors(ctx,
+		eventing.DispatcherLabelSelectorStr,
+	)
+}