Merge pull request kubernetes#87548 from skilxn-go/AddLoging

Add logging to scheduler's event handlers

Author: k8s-ci-robot

pkg/scheduler/eventhandlers.go

@@ -100,6 +100,7 @@ func (sched *Scheduler) addNodeToCache(obj interface{}) {
 		klog.Errorf("scheduler cache AddNode failed: %v", err)
 	}
 
+	klog.V(3).Infof("add event for node %q", node.Name)
 	sched.SchedulingQueue.MoveAllToActiveOrBackoffQueue(queue.NodeAdd)
 }
 
@@ -147,6 +148,7 @@ func (sched *Scheduler) deleteNodeFromCache(obj interface{}) {
 		klog.Errorf("cannot convert to *v1.Node: %v", t)
 		return
 	}
+	klog.V(3).Infof("delete event for node %q", node.Name)
 	// NOTE: Updates must be written to scheduler cache before invalidating
 	// equivalence cache, because we could snapshot equivalence cache after the
 	// invalidation and then snapshot the cache itself. If the cache is
@@ -166,7 +168,9 @@ func (sched *Scheduler) onCSINodeUpdate(oldObj, newObj interface{}) {
 }
 
 func (sched *Scheduler) addPodToSchedulingQueue(obj interface{}) {
-	if err := sched.SchedulingQueue.Add(obj.(*v1.Pod)); err != nil {
+	pod := obj.(*v1.Pod)
+	klog.V(3).Infof("add event for unscheduled pod %s/%s", pod.Namespace, pod.Name)
+	if err := sched.SchedulingQueue.Add(pod); err != nil {
 		utilruntime.HandleError(fmt.Errorf("unable to queue %T: %v", obj, err))
 	}
 }
@@ -197,6 +201,7 @@ func (sched *Scheduler) deletePodFromSchedulingQueue(obj interface{}) {
 		utilruntime.HandleError(fmt.Errorf("unable to handle object in %T: %T", sched, obj))
 		return
 	}
+	klog.V(3).Infof("delete event for unscheduled pod %s/%s", pod.Namespace, pod.Name)
 	if err := sched.SchedulingQueue.Delete(pod); err != nil {
 		utilruntime.HandleError(fmt.Errorf("unable to dequeue %T: %v", obj, err))
 	}
@@ -213,6 +218,7 @@ func (sched *Scheduler) addPodToCache(obj interface{}) {
 		klog.Errorf("cannot convert to *v1.Pod: %v", obj)
 		return
 	}
+	klog.V(3).Infof("add event for scheduled pod %s/%s ", pod.Namespace, pod.Name)
 
 	if err := sched.SchedulerCache.AddPod(pod); err != nil {
 		klog.Errorf("scheduler cache AddPod failed: %v", err)
@@ -261,6 +267,7 @@ func (sched *Scheduler) deletePodFromCache(obj interface{}) {
 		klog.Errorf("cannot convert to *v1.Pod: %v", t)
 		return
 	}
+	klog.V(3).Infof("delete event for scheduled pod %s/%s ", pod.Namespace, pod.Name)
 	// NOTE: Updates must be written to scheduler cache before invalidating
 	// equivalence cache, because we could snapshot equivalence cache after the
 	// invalidation and then snapshot the cache itself. If the cache is