如何在一台 Windows 服务器上运行多个 ASP.NET 核心 MQTT 代理？

Question

I implemented a MQTT broker by asp.net core 2.2 and want to run it on a Windows server 2016. I am using MQTTnet version 2.8.5 for implementing this broker. This is my startup code:

public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<MyMqttServer>();
            services.AddMvc();

            var mqttServerOptions = new MqttServerOptionsBuilder()
                .WithDefaultEndpointPort(1886)
                .Build();
            services
                .AddHostedMqttServer(mqttServerOptions)
                .AddMqttConnectionHandler()
                .AddConnections()
                .AddMqttTcpServerAdapter();
        }

        public void Configure(IApplicationBuilder app, MyMqttServer myMqttServer)
        {
            app.UseDefaultFiles();
            app.UseStaticFiles();

            app.UseMqttServer(server =>
            {
                server.Started += async (sender, args) => await myMqttServer.RunAsync();
            });
         }

and this is my code in Program.cs

public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
            .UseKestrel(o =>
            {
                o.ListenAnyIP(1885, l => l.UseMqtt()); // mqtt pipeline
                o.ListenAnyIP(5000); // default http pipeline
            })
                .UseStartup<Startup>()
                .Build();

I have two different MQTT broker applications with these settings for MQTT (the other one is set on port 1883 and 1884 in startup) but with different ports. The problem is only one of these MQTT brokers (the broker that works on 1883,1884) works at the same time and the other one does not work. How can I solve that?

Answer 1

Thanks to JanEggers in MQTTNET team he helped me to solve the issue. The problem was I have a class myMqttServer that overrides the settings in startup and main class. So I needed to remove those settings and do it in myMqttServer class. You can see the details in this github link.

https://github.com/chkr1011/MQTTnet/issues/566