子域通过 traefik 和 docker-compose 获得 ERR_NAME_NOT_RESOLVED

Question

我有一个简单的 wordpress docker-compose 设置，可以在我的主域上运行，并且定义如下：

version: '3.2'

services:
  reverse-proxy:
    image: traefik # The official Traefik docker image
    command: --api --docker # Enables the web UI and tells Traefik to listen to docker
    ports:
      - "443:443"
      - "80:80"     # The HTTP port
      - "8080:8080" # The Web UI (enabled by --api)
    volumes:
      - /etc/traefik/traefik.toml:/traefik.toml
      - /var/run/docker.sock:/var/run/docker.sock # So that Traefik
    networks: 
      - internal
      - test_network
  db:
      image: mysql:5.7
      volumes:
        - db_data:/var/lib/mysql
      restart: always
      environment:
        MYSQL_ROOT_PASSWORD: somewordpress
        MYSQL_DATABASE: wordpress
        MYSQL_USER: wordpress
        MYSQL_PASSWORD: wordpress
      networks: 
        - internal
        - test_network
  wordpress:
      ports:
        - "8001:8001"
      depends_on:
        - db
      image: wordpress:latest
      restart: always
      environment:
        WORDPRESS_DB_HOST: db:3306
        WORDPRESS_DB_USER: wordpress
        WORDPRESS_DB_PASSWORD: wordpress
        WORDPRESS_DB_NAME: wordpress
      labels:
        - "traefik.frontend.rule=Host:blog.example.com"

      networks: 
        - internal
        - test_network

volumes:
  db_data: {}
networks:
  test_network:
    external: true
  internal:
    external: false

当我尝试访问 blog.example.com 但将前端规则更改为时，我在浏览器中收到一条 ERR_NAME_NOT_RESOLVED 消息

    - "traefik.frontend.rule=Host:example.com"

它按我的预期工作。我做错了什么？

/etc/traefik/traefik.toml 中目前没有任何内容，并且该文件目前不存在。

Answer 1

原来我必须在注册商/网络主机上配置子域。更新 A 记录后，它就开始工作了。