skip reconcile if spec not changed

Author: sircthulhu

internal/controller/etcdcluster_controller.go

@@ -21,6 +21,9 @@ import (
 	"fmt"
 	"slices"
 
+	"sigs.k8s.io/controller-runtime/pkg/builder"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+
 	appsv1 "k8s.io/api/apps/v1"
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
@@ -437,7 +440,7 @@ func (r *EtcdClusterReconciler) updateClusterState(cluster *etcdaenixiov1alpha1.
 // SetupWithManager sets up the controller with the Manager.
 func (r *EtcdClusterReconciler) SetupWithManager(mgr ctrl.Manager) error {
 	return ctrl.NewControllerManagedBy(mgr).
-		For(&etcdaenixiov1alpha1.EtcdCluster{}).
+		For(&etcdaenixiov1alpha1.EtcdCluster{}, builder.WithPredicates(predicate.GenerationChangedPredicate{})).
 		Owns(&appsv1.StatefulSet{}).
 		Owns(&corev1.ConfigMap{}).
 		Owns(&corev1.Service{}).