如何设置TCP服务后端？

Question

我有一个通过docker-compose开始并由traefik管理的MQTT经纪人：

  mqtt:
    container_name: mqtt
    image: eclipse-mosquitto
    restart: always
    labels:
      - 'traefik.port=1883'
      - 'traefik.frontend.rule=Host:mqtt2.ex.com'
      - 'traefik.frontend.entryPoints=mqtt'
    ports:
      - 3883:1883

我正在尝试设置后端的traefik.toml的相关部分：

[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.mqtt]
address = ":2884"

[tcp] # YAY!
   [tcp.routers]
      [tcp.routers.mqtt]
         entrypoints = ["mqtt"]
         rule = "HostSNI(`*`)" # Catches every request       
         service = "mqtt"
   [tcp.services]
   [tcp.services.mqtt.LoadBalancer]


I can access the broker via port `3883` but this is not what I intend to do (the exposed port above is just to make sure that the container is OK): I would like to proxy it though `traefik` like all my other **HTTP** services.

This however is not a HTTP service, it is a TCP one and my problem is that **I do not know how to configure such a TCP backend**.

documentation对该功能的要求很低，只是指出

  

当前，LoadBalancer是唯一受支持的TCP服务。   但是，由于Traefik是一个不断发展的项目，因此其他类型的TCP   将来会提供服务，因此您必须   指定它。

就配置后端而言，这意味着什么？我应该在docker-compose.yaml或traefik.toml中添加些什么，以使后端被识别为TCP服务？目前，它被视为HTTP，并且代理无效：