docker containers labels support

[pmioulet]

Hi, I was just wondering if there is any plan to support the addition of labels to the containers. Some projects such as traefik allow dynamic configuration through the exploration of labels applied to containers.
Thanks for your work on this great tool !

[charleskorn]

Thanks for the suggestion @pmioulet. Do you have a link to an example of this? I've not used traefik before so I'm not familiar with this.

[pmioulet]

Below is simple example of what I would do with docker compose to use trafik as a reverse proxy in front of keycloak (please note that example is not functional as postgres is missing).

labels usage is at the bottom, "traefik.http.routers.keycloak.rule=Host(`keycloak.localhost`)". These labels allow traffik to know it should route anything coming on keycloak.localhost to the keycloak container.

  traefik:
    container_name: traefik
    healthcheck:
      test:
        - CMD
        - traefik
        - healthcheck
      interval: 10s
      timeout: 5s
      retries: 3
    image: traefik:v2.5
    command: --api.insecure=true --providers.docker
    ports:
      - "80:80"
      - "443:443"
      - "8081:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro

  keycloak:
    container_name: "keycloak"
    image: jboss/keycloak:15.0.2
    ports:
      - 8080:8080
    volumes:
      - ./src/main/resources/keycloak/truck-load-realm-local.json:/truck-load-realm.json
    environment:
      KEYCLOAK_IMPORT: /my-realm.json
      KEYCLOAK_USER: admin
      KEYCLOAK_PASSWORD: password
      KEYCLOAK_LOGLEVEL: DEBUG
      DB_VENDOR: POSTGRES
      DB_ADDR: postgres
      DB_PORT: 5432
      DB_DATABASE: keycloak
      DB_USER: admin
      DB_PASSWORD: password
      KEYCLOAK_FRONTEND_URL: http://keycloak.localhost/auth
      PROXY_ADDRESS_FORWARDING: "true"
    depends_on:
      -  postgres
    labels:
      - "traefik.http.routers.keycloak.rule=Host(`keycloak.localhost`)"
      - "traefik.http.services.keycloak.loadbalancer.server.port=8080"

[charleskorn]

Right, makes sense, thanks @pmioulet. I'll add support for labels to my backlog. (PRs are also always welcome :) )

[pmioulet]

Thanks, maybe in feb i'll have some time to learn kotlin this would be a way to get started I guess :)

[charleskorn]

That would be awesome - if you need any help or want to run something by me, feel free to post here or open a draft PR.

[charleskorn]

Labels are now supported as of v0.81 🎉

Check out https://batect.dev/docs/reference/config/containers/#labels for documentation on how to use them.

[pmioulet]

Thanks heaps!