[release-1.12] fix selector path for cg scale subresource (#3688)

* fix selector path for cg scale subresource

Signed-off-by: Calum Murray <cmurray@redhat.com>

* set .status.selector properly

Signed-off-by: Calum Murray <cmurray@redhat.com>

* fix: unit tests expect correct cg status

Signed-off-by: Calum Murray <cmurray@redhat.com>

* fix: selector is omitted from struct when empty

Co-authored-by: Pierangelo Di Pilato <pierangelodipilato@gmail.com>

---------

Signed-off-by: Calum Murray <cmurray@redhat.com>
Co-authored-by: Calum Murray <cmurray@redhat.com>
Co-authored-by: Pierangelo Di Pilato <pierangelodipilato@gmail.com>

Author: 3 people

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

@@ -124,6 +124,10 @@ type ConsumerGroupStatus struct {
 	// same Template, but individual replicas also have a consistent identity.
 	// +optional
 	Replicas *int32 `json:"replicas,omitempty"`
+
+	// Selector is the string serialized label selector needed for the scale subresource.
+	// Defaults to ""
+	Selector string `json:"selector,omitempty"`
 }
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

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

@@ -178,6 +178,8 @@ type Reconciler struct {
 func (r *Reconciler) ReconcileKind(ctx context.Context, cg *kafkainternals.ConsumerGroup) reconciler.Event {
 	recordExpectedReplicasMetric(ctx, cg)
 
+	r.reconcileStatusSelector(cg)
+
 	if err := r.reconcileInitialOffset(ctx, cg); err != nil {
 		return cg.MarkInitializeOffsetFailed("InitializeOffset", err)
 	}
@@ -259,6 +261,10 @@ func (r *Reconciler) FinalizeKind(ctx context.Context, cg *kafkainternals.Consum
 	return nil
 }
 
+func (r *Reconciler) reconcileStatusSelector(cg *kafkainternals.ConsumerGroup) {
+	cg.Status.Selector = labels.SelectorFromValidatedSet(cg.Spec.Selector).String()
+}
+
 func (r *Reconciler) deleteConsumerGroupMetadata(ctx context.Context, cg *kafkainternals.ConsumerGroup) error {
 	saramaSecurityOption, err := r.newAuthConfigOption(ctx, cg)
 	if err != nil {

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

@@ -148,6 +148,7 @@ func TestReconcileKind(t *testing.T) {
 							ConsumerGroupReplicas(2),
 							ConsumerGroupStatusReplicas(0),
 							ConsumerForTrigger(),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 						)
 						cg.Status.Placements = []eventingduckv1alpha1.Placement{
 							{PodName: "p1", VReplicas: 1},
@@ -234,6 +235,7 @@ func TestReconcileKind(t *testing.T) {
 								),
 							)),
 							ConsumerGroupReplicas(2),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupStatusReplicas(0),
 							ConsumerForTrigger(),
 						)
@@ -340,6 +342,7 @@ func TestReconcileKind(t *testing.T) {
 								}),
 							)),
 							ConsumerGroupReplicas(2),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerForTrigger(),
 						)
 						cg.InitializeConditions()
@@ -448,6 +451,7 @@ func TestReconcileKind(t *testing.T) {
 								}),
 							)),
 							ConsumerGroupReplicas(2),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupStatusReplicas(0),
 							ConsumerForTrigger(),
 						)
@@ -572,6 +576,7 @@ func TestReconcileKind(t *testing.T) {
 								}),
 							)),
 							ConsumerGroupReplicas(2),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupStatusReplicas(1),
 							ConsumerForTrigger(),
 						)
@@ -758,6 +763,7 @@ func TestReconcileKind(t *testing.T) {
 								}),
 							)),
 							ConsumerGroupReplicas(2),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerForTrigger(),
 						)
 						cg.InitializeConditions()
@@ -974,6 +980,7 @@ func TestReconcileKind(t *testing.T) {
 							)),
 							ConsumerGroupReplicas(2),
 							ConsumerGroupStatusReplicas(1),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerForTrigger(),
 						)
 						cg.Status.Placements = []eventingduckv1alpha1.Placement{
@@ -1063,6 +1070,7 @@ func TestReconcileKind(t *testing.T) {
 							ConsumerGroupReplicas(1),
 							ConsumerGroupStatusReplicas(0),
 							ConsumerForTrigger(),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 						)
 						cg.Status.Placements = []eventingduckv1alpha1.Placement{
 							{PodName: "p1", VReplicas: 1},
@@ -1144,6 +1152,7 @@ func TestReconcileKind(t *testing.T) {
 									ConsumerGroupIdConfig("my.group.id"),
 								),
 							)),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupReplicas(2),
 							ConsumerGroupStatusReplicas(0),
 							ConsumerForTrigger(),
@@ -1230,6 +1239,7 @@ func TestReconcileKind(t *testing.T) {
 									ConsumerGroupIdConfig("my.group.id"),
 								),
 							)),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupReplicas(2),
 							ConsumerGroupStatusReplicas(1),
 							ConsumerForTrigger(),
@@ -1358,6 +1368,7 @@ func TestReconcileKind(t *testing.T) {
 									ConsumerInitialOffset(sources.OffsetLatest),
 								)),
 							)),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupReplicas(3),
 							ConsumerForTrigger(),
 						)
@@ -1468,6 +1479,7 @@ func TestReconcileKind(t *testing.T) {
 									ConsumerGroupIdConfig("my.group.id"),
 								),
 							)),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupReplicas(3),
 							ConsumerForTrigger(),
 						)
@@ -1577,6 +1589,7 @@ func TestReconcileKind(t *testing.T) {
 									ConsumerGroupIdConfig("my.group.id"),
 								),
 							)),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupReplicas(2),
 							ConsumerForTrigger(),
 						)
@@ -1640,6 +1653,7 @@ func TestReconcileKind(t *testing.T) {
 								),
 							)),
 							ConsumerGroupReplicas(2),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerForTrigger(),
 						)
 						cg.GetConditionSet().Manage(cg.GetStatus()).InitializeConditions()
@@ -1776,6 +1790,7 @@ func TestReconcileKindNoAutoscaler(t *testing.T) {
 								),
 							)),
 							ConsumerGroupReplicas(2),
+							ConsumerGroupStatusSelector(ConsumerLabels),
 							ConsumerGroupStatusReplicas(1),
 							ConsumerForTrigger(),
 						)

control-plane/pkg/reconciler/testing/objects_consumergroup.go

@@ -23,6 +23,7 @@ import (
 
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/utils/pointer"
 	"knative.dev/pkg/apis"
 	duckv1 "knative.dev/pkg/apis/duck/v1"
@@ -189,6 +190,12 @@ func ConsumerGroupStatusReplicas(replicas int32) ConsumerGroupOption {
 	}
 }
 
+func ConsumerGroupStatusSelector(label map[string]string) ConsumerGroupOption {
+	return func(cg *kafkainternals.ConsumerGroup) {
+		cg.Status.Selector = labels.SelectorFromSet(label).String()
+	}
+}
+
 func ConsumerGroupReplicasStatus(replicas int32) ConsumerGroupOption {
 	return func(cg *kafkainternals.ConsumerGroup) {
 		cg.Status.Replicas = pointer.Int32(replicas)