debug(): compare resource versions

internal/informer.go

@@ -26,9 +26,26 @@ func StartLeaseInformer(cfg *Config, stopCh <-chan struct{}) error {
 
 	leaseInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
 		AddFunc: func(obj interface{}) {
+			if l, ok := obj.(*v1.Lease); ok {
+				log.WithFields(log.Fields{"Caller": "lease.Add", "Lease": l.Name, "RV": l.ResourceVersion}).Debug("Add event for lease")
+			}
 			handleLease(obj, cfg)
 		},
 		UpdateFunc: func(oldObj, newObj interface{}) {
+			oldL, okOld := oldObj.(*v1.Lease)
+			newL, okNew := newObj.(*v1.Lease)
+			if okOld {
+				log.WithFields(log.Fields{"Caller": "lease.Update.old", "Lease": oldL.Name, "RV": oldL.ResourceVersion}).Debug("Old lease")
+			}
+			if okNew {
+				log.WithFields(log.Fields{"Caller": "lease.Update.new", "Lease": newL.Name, "RV": newL.ResourceVersion}).Debug("New lease")
+			}
+			// Only handle when resourceVersion changed (actual update), skip resync/identical events
+			if okOld && okNew {
+				if oldL.ResourceVersion == newL.ResourceVersion {
+					return
+				}
+			}
 			handleLease(newObj, cfg)
 		},
 		DeleteFunc: func(obj interface{}) {