Docker-compose 多个服务监听同一个端口，不同域

Question

如何让多个 docker 服务监听相同的端口，但只使用不同的域？

是否可以在 docker-compose 中定义，或者我是否只需要一个服务监听端口，然后根据域将流量重新路由到相应的服务？

---

这个例子失败了，因为它在整个网络上监听(而不仅仅是域)

docker-compose up
Creating network "test-docker_default" with the default driver
Creating test-docker_static_1 ... done
Creating test-docker_app_1    ... 
Creating test-docker_app_1    ... error

ERROR: for test-docker_app_1  Cannot start service app: driver failed programming external connectivity on endpoint test-docker_app_1 (ef433ffad1af01ffa31cd8a69a8c15b69ca7e7b6935924d34891b92682570e68): Bind for 0.0.0.0:80 failed: port is already allocated

ERROR: for app  Cannot start service app: driver failed programming external connectivity on endpoint test-docker_app_1 (ef433ffad1af01ffa31cd8a69a8c15b69ca7e7b6935924d34891b92682570e68): Bind for 0.0.0.0:80 failed: port is already allocated

docker-compose.yml

version: '3.3'
services:

  app:
    image: node
    depends_on:
      - static
    networks:
      default:
        aliases:
          - app.localhost
    ports:
      - 80:80

  static:
    image: nginx
    networks:
      default:
        aliases:
          - static.localhost
    ports:
      - 80:80

/etc/hosts

127.0.0.1    app.localhost
127.0.0.1    static.localhost

Answer 1

您只能将一个容器映射到主机的同一个端口。如果你想在同一个主机端口上映射 2 个服务，你应该使用像 Traefik 这样的反向代理(与 docker 很好地集成)。反向代理将监听主机端口 80，然后根据一些已定义的规则(如别名、url 路径)转发到未映射到主机的端口上的特定 docker 容器。