Deprecate name/namespace labels of pp/cpp

pkg/apis/policy/v1alpha1/well_known_constants.go

@@ -16,6 +16,7 @@ limitations under the License.
 
 package v1alpha1
 
+// The well-known label key constant.
 const (
 	// PropagationPolicyPermanentIDLabel is the identifier of a PropagationPolicy object.
 	// Karmada generates a unique identifier, such as metadata.UUID, for each PropagationPolicy object.
@@ -31,6 +32,19 @@ const (
 	// In backup scenarios, when applying the backup resource manifest in a new cluster, the UUID may change.
 	ClusterPropagationPolicyPermanentIDLabel = "clusterpropagationpolicy.karmada.io/permanent-id"
 
+	// NamespaceSkipAutoPropagationLabel is added to namespace objects to indicate if
+	// the namespace should be skipped from propagating by the namespace controller.
+	// For example, a namespace with the following label will be skipped:
+	//   labels:
+	//     namespace.karmada.io/skip-auto-propagation: "true"
+	//
+	// NOTE: If create a ns without this label, then patch it with this label, the ns will not be
+	// synced to new member clusters, but old member clusters still have it.
+	NamespaceSkipAutoPropagationLabel = "namespace.karmada.io/skip-auto-propagation"
+)
+
+// The well-known annotation key constant.
+const (
 	// PropagationPolicyNamespaceAnnotation is added to objects to specify associated PropagationPolicy namespace.
 	PropagationPolicyNamespaceAnnotation = "propagationpolicy.karmada.io/namespace"
 
@@ -39,23 +53,19 @@ const (
 
 	// ClusterPropagationPolicyAnnotation is added to objects to specify associated ClusterPropagationPolicy name.
 	ClusterPropagationPolicyAnnotation = "clusterpropagationpolicy.karmada.io/name"
+)
 
+// TODO(whitewindmills): These deprecated labels will be removed in a future version.
+const (
 	// PropagationPolicyNamespaceLabel is added to objects to specify associated PropagationPolicy namespace.
+	// Deprecated
 	PropagationPolicyNamespaceLabel = "propagationpolicy.karmada.io/namespace"
 
 	// PropagationPolicyNameLabel is added to objects to specify associated PropagationPolicy's name.
+	// Deprecated
 	PropagationPolicyNameLabel = "propagationpolicy.karmada.io/name"
 
 	// ClusterPropagationPolicyLabel is added to objects to specify associated ClusterPropagationPolicy.
+	// Deprecated
 	ClusterPropagationPolicyLabel = "clusterpropagationpolicy.karmada.io/name"
-
-	// NamespaceSkipAutoPropagationLabel is added to namespace objects to indicate if
-	// the namespace should be skipped from propagating by the namespace controller.
-	// For example, a namespace with the following label will be skipped:
-	//   labels:
-	//     namespace.karmada.io/skip-auto-propagation: "true"
-	//
-	// NOTE: If create a ns without this label, then patch it with this label, the ns will not be
-	// synced to new member clusters, but old member clusters still have it.
-	NamespaceSkipAutoPropagationLabel = "namespace.karmada.io/skip-auto-propagation"
 )

pkg/controllers/federatedhpa/federatedhpa_controller.go

@@ -404,25 +404,20 @@ func (c *FHPAController) reconcileAutoscaler(ctx context.Context, hpa *autoscali
 
 func (c *FHPAController) getBindingByLabel(resourceLabel map[string]string, resourceRef autoscalingv2.CrossVersionObjectReference) (*workv1alpha2.ResourceBinding, error) {
 	if len(resourceLabel) == 0 {
-		return nil, fmt.Errorf("Target resource has no label. ")
+		return nil, errors.New("target resource has no label")
 	}
 
-	var policyName, policyNameSpace string
 	var selector labels.Selector
-	if _, ok := resourceLabel[policyv1alpha1.PropagationPolicyNameLabel]; ok {
-		policyName = resourceLabel[policyv1alpha1.PropagationPolicyNameLabel]
-		policyNameSpace = resourceLabel[policyv1alpha1.PropagationPolicyNamespaceLabel]
+	if policyID, ok := resourceLabel[policyv1alpha1.PropagationPolicyPermanentIDLabel]; ok {
 		selector = labels.SelectorFromSet(labels.Set{
-			policyv1alpha1.PropagationPolicyNameLabel:      policyName,
-			policyv1alpha1.PropagationPolicyNamespaceLabel: policyNameSpace,
+			policyv1alpha1.PropagationPolicyPermanentIDLabel: policyID,
 		})
-	} else if _, ok = resourceLabel[policyv1alpha1.ClusterPropagationPolicyLabel]; ok {
-		policyName = resourceLabel[policyv1alpha1.ClusterPropagationPolicyLabel]
+	} else if policyID, ok = resourceLabel[policyv1alpha1.ClusterPropagationPolicyPermanentIDLabel]; ok {
 		selector = labels.SelectorFromSet(labels.Set{
-			policyv1alpha1.ClusterPropagationPolicyLabel: policyName,
+			policyv1alpha1.ClusterPropagationPolicyPermanentIDLabel: policyID,
 		})
 	} else {
-		return nil, fmt.Errorf("No label of policy found. ")
+		return nil, errors.New("no label of policy permanent-id found")
 	}
 
 	binding := &workv1alpha2.ResourceBinding{}
@@ -432,7 +427,7 @@ func (c *FHPAController) getBindingByLabel(resourceLabel map[string]string, reso
 		return nil, err
 	}
 	if len(bindingList.Items) == 0 {
-		return nil, fmt.Errorf("Length of binding list is zero. ")
+		return nil, errors.New("length of binding list is zero")
 	}
 
 	found := false
@@ -444,15 +439,15 @@ func (c *FHPAController) getBindingByLabel(resourceLabel map[string]string, reso
 		}
 	}
 	if !found {
-		return nil, fmt.Errorf("No binding matches the target resource. ")
+		return nil, errors.New("no binding matches the target resource")
 	}
 
 	return binding, nil
 }
 
 func (c *FHPAController) getTargetCluster(binding *workv1alpha2.ResourceBinding) ([]string, error) {
 	if len(binding.Spec.Clusters) == 0 {
-		return nil, fmt.Errorf("Binding has no schedulable clusters. ")
+		return nil, errors.New("binding has no schedulable clusters")
 	}
 
 	var allClusters []string

pkg/controllers/hpascaletargetmarker/hpa_scale_target_marker_predicate.go

@@ -91,7 +91,7 @@ func (r *HpaScaleTargetMarker) Generic(_ event.GenericEvent) bool {
 }
 
 func hasBeenPropagated(hpa *autoscalingv2.HorizontalPodAutoscaler) bool {
-	_, ppExist := hpa.GetLabels()[policyv1alpha1.PropagationPolicyNameLabel]
-	_, cppExist := hpa.GetLabels()[policyv1alpha1.ClusterPropagationPolicyLabel]
+	_, ppExist := hpa.GetLabels()[policyv1alpha1.PropagationPolicyPermanentIDLabel]
+	_, cppExist := hpa.GetLabels()[policyv1alpha1.ClusterPropagationPolicyPermanentIDLabel]
 	return ppExist || cppExist
 }