Example of handling graceful shutdowns with gin-gonic

graceful_httpserver.go

// runServer will start the HTTPServer, handling graceful
// shutdown on receives SIGTERM / SIGINT.
func runServer(addr string, engine *gin.Engine) {
	s := &http.Server{
		Addr:         addr,
		Handler:      engine.Handler(),
	}

	go func() {
		log.Info("server starting")
		if err := s.ListenAndServe(); err != http.ErrServerClosed {
			panic(err)
		}
	}()

	c := make(chan os.Signal, 2) // Need to be buffered, see https://pkg.go.dev/os/signal#Notify
	signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)

	<-c // block until signal received 

	ctx, releaseTimeout := context.WithTimeout(context.Background(), 5*time.Second)
	defer releaseTimeout()
	if err := server.Shutdown(ctx); err != nil {
		log.Fatal("Server shutdown failed or timed out: ", err)
	}
	log.Println("Graceful shut down complete")
}