add debug log

Signed-off-by: lhy1024 <[email protected]>

pkg/election/leadership.go

@@ -245,9 +245,11 @@ func (ls *Leadership) Watch(serverCtx context.Context, revision int64) {
 				zap.String("purpose", ls.purpose))
 			return
 		case <-ticker.C:
+			log.Info("run ticker in watch loop")
 			if !etcdutil.IsHealthy(serverCtx, ls.client) {
 				// When etcd is not available, the watcher.RequestProgress will block,
 				// so we check the etcd availability first.
+				log.Warn("unhealthy in watch loop")
 				continue
 			}
 			log.Info("request progress in watch loop")
@@ -257,6 +259,7 @@ func (ls *Leadership) Watch(serverCtx context.Context, revision int64) {
 			}
 			cancel()
 			if time.Since(lastReceivedResponseTime) >= etcdutil.WatchChTimeoutDuration {
+				log.Info("update watchChan in watch loop")
 				// If no msg comes from an etcd watchChan for WatchChTimeoutDuration long,
 				// we should cancel the watchChan and request a new watchChan from watcher.
 				continue