[#745] node: Add more debug logs on shutdown

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

cmd/neofs-node/grpc.go

@@ -50,9 +50,17 @@ func serveGRPC(c *cfg) {
 
 		go func() {
 			defer func() {
+				c.log.Info("stop listening gRPC endpoint",
+					zap.String("endpoint", lis.Addr().String()),
+				)
+
 				c.wg.Done()
 			}()
 
+			c.log.Info("start listening gRPC endpoint",
+				zap.String("endpoint", lis.Addr().String()),
+			)
+
 			if err := srv.Serve(lis); err != nil {
 				fmt.Println("gRPC server error", err)
 			}

cmd/neofs-node/main.go

@@ -117,6 +117,8 @@ func shutdown(c *cfg) {
 		closer()
 	}
 
+	c.log.Debug("waiting for all processes to stop")
+
 	c.wg.Wait()
 }
 

cmd/neofs-node/metrics.go

@@ -31,11 +31,15 @@ func initMetrics(c *cfg) {
 	}))
 
 	c.closers = append(c.closers, func() {
+		c.log.Debug("shutting down metrics service")
+
 		err := srv.Shutdown()
 		if err != nil {
 			c.log.Debug("could not shutdown metrics server",
 				zap.String("error", err.Error()),
 			)
 		}
+
+		c.log.Debug("metrics service has been stopped")
 	})
 }

cmd/neofs-node/pprof.go

@@ -30,11 +30,15 @@ func initProfiler(c *cfg) {
 	}))
 
 	c.closers = append(c.closers, func() {
+		c.log.Debug("shutting down profiling service")
+
 		err := srv.Shutdown()
 		if err != nil {
 			c.log.Debug("could not shutdown pprof server",
 				zap.String("error", err.Error()),
 			)
 		}
+
+		c.log.Debug("profiling service has been stopped")
 	})
 }