docker compose reverse port map without using Host network driver (--net=host) - eviltoast

Hi guys quick question say you run a a application on your localhost (example lets say couchdb runing directly on localhost:3434 not in docker).

Now you have a docker container (say caddy, ngnix, etc). Is there a way to allow docker container to acess localhost:3434 WITHOUT using the Host network driver (–net=host)

  • Morethanevil@lemmy.fedifriends.socialEnglish
    8·
    4 months ago

    Add this to the service in your docker-compose.yml

      extra_hosts:
     - host.docker.internal:host-gateway

    Example:

    services:
    redis:
    restart: always
    container_name: redis
    image: redis:7.2-alpine
    extra_hosts:
      - host.docker.internal:host-gateway

    Then you can reach your host from inside the container via host.docker.internal:3434

    host.docker.internal is like your “localhost” on the host. It is a special DNS name.