Example of handling graceful shutdowns with gin-gonic

graceful_httpserver.go

// runServer will start the HTTPServer, handling graceful
// shutdown on receives SIGTERM / SIGINT, returning nil.
//
// - returns error if the server can not start
// - returns error if the server panics in a way that isn't
//   otherwise handled by gin
// - no errors otherwise
func runServer(addr string, r *gin.Engine) error {
	s := &http.Server{
		Addr:         addr,
		Handler:      r,
		ReadTimeout:  ReadTimeout,
		WriteTimeout: WriteTimeout,
	}

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

	c := make(chan os.Signal, 2)
	signal.Notify(c, os.Interrupt, syscall.SIGTERM)

	<-c // block until signal received 

	log.Info("shutting down")
	s.Shutdown(nil)

	return nil
}