如何用Traefik+Docker Compose将多子域名绑定到单容器不同端口

Got it, let's set up your subdomains to route to the correct ports on your Docker container using Traefik and Docker Compose. Here's a complete, working configuration tailored to your needs:

version: '3.8'

networks:
  web:
    external: true  # Assumes you've already created this network for Traefik

services:
  my_container:
    container_name: my_container
    restart: always
    build: .
    networks:
      - web
    labels:
      # Base Traefik configuration
      - "traefik.backend=my_container"
      - "traefik.enable=true"
      - "traefik.docker.network=web"
      
      # Route api.mydomain.com to container port 5000
      - "traefik.api.frontend.rule=Host:api.mydomain.com"
      - "traefik.api.port=5000"
      
      # Route dl.mydomain.com to container port 5001
      - "traefik.dl.frontend.rule=Host:dl.mydomain.com"
      - "traefik.dl.port=5001"
      
      # Route blog.mydomain.com to container port 5002
      - "traefik.blog.frontend.rule=Host:blog.mydomain.com"
      - "traefik.blog.port=5002"

Key Details to Note: #

• Named Routers: We use unique prefixes (traefik.api., traefik.dl., traefik.blog.) for each routing rule to avoid conflicts—this lets Traefik distinguish between the different subdomain routes.
• Port Mapping: The traefik.<prefix>.port label tells Traefik which port on your container to forward traffic to for each subdomain.
• Network: Make sure your Traefik instance is also attached to the web external network (this is standard practice to keep Traefik isolated but connected to your services).
• DNS Setup: Don't forget to create A records for each subdomain (api, dl, blog) pointing to your server's public IP address—without this, the subdomains won't resolve to your container.

Quick Check Before Deploying: #

1. Confirm the web network exists (run docker network ls to verify; if not, create it with docker network create web).
2. Ensure your Traefik configuration is set up to listen to Docker labels (most standard Traefik setups include this by default).

内容的提问来源于stack exchange，提问作者mohammad shobeiri