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

submitted 1 month ago* (last edited 1 month ago) by Deemo@bookwormstory.social to c/selfhosted@lemmy.world

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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)

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[-] morethanevil@lemmy.fedifriends.social 8 points 1 month ago* (last edited 1 month 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.

[-] Deemo@bookwormstory.social 2 points 1 month ago

Thanks for the tip

this post was submitted on 26 Jul 2024

17 points (94.7% liked)

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