🚒 add error message in controller

pkg/controller/destinationrule/destinationrule_controller.go

@@ -148,12 +148,10 @@ func NewDestinationRuleController(deploymentInformer informersv1.DeploymentInfor
 }
 
 func (v *DestinationRuleController) Start(stopCh <-chan struct{}) error {
-	v.Run(5, stopCh)
-
-	return nil
+	return v.Run(5, stopCh)
 }
 
-func (v *DestinationRuleController) Run(workers int, stopCh <-chan struct{}) {
+func (v *DestinationRuleController) Run(workers int, stopCh <-chan struct{}) error {
 	defer utilruntime.HandleCrash()
 	defer v.queue.ShutDown()
 
@@ -161,7 +159,7 @@ func (v *DestinationRuleController) Run(workers int, stopCh <-chan struct{}) {
 	defer log.Info("shutting down destinationrule controller")
 
 	if !cache.WaitForCacheSync(stopCh, v.serviceSynced, v.destinationRuleSynced, v.deploymentSynced, v.servicePolicySynced) {
-		return
+		return fmt.Errorf("failed to wait for caches to sync")
 	}
 
 	for i := 0; i < workers; i++ {
@@ -169,6 +167,7 @@ func (v *DestinationRuleController) Run(workers int, stopCh <-chan struct{}) {
 	}
 
 	<-stopCh
+	return nil
 }
 
 func (v *DestinationRuleController) enqueueService(obj interface{}) {