updated to handle cronjob flow

cmd/descheduler/app/server.go

@@ -73,7 +73,7 @@ func NewDeschedulerCommand(out io.Writer) *cobra.Command {
 			}
 
 			ctx, done := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
-			defer done()
+
 			pathRecorderMux := mux.NewPathRecorderMux("descheduler")
 			if !s.DisableMetrics {
 				pathRecorderMux.Handle("/metrics", legacyregistry.HandlerWithReset())
@@ -81,15 +81,20 @@ func NewDeschedulerCommand(out io.Writer) *cobra.Command {
 
 			healthz.InstallHandler(pathRecorderMux, healthz.NamedCheck("Descheduler", healthz.PingHealthz.Check))
 
-			if _, err := SecureServing.Serve(pathRecorderMux, 0, ctx.Done()); err != nil {
+			stoppedCh, err := SecureServing.Serve(pathRecorderMux, 0, ctx.Done())
+			if err != nil {
 				klog.Fatalf("failed to start secure server: %v", err)
 				return
 			}
 
-			err := Run(ctx, s)
+			err = Run(ctx, s)
 			if err != nil {
 				klog.ErrorS(err, "descheduler server")
 			}
+
+			done()
+			// wait for metrics server to close
+			<-stoppedCh
 		},
 	}
 	cmd.SetOut(out)