[Question] How to pass only redis host as an environment variable?

[EonYang]

Hi, I'm trying to put rq_dashboard into docker-compose.yaml.

I see that I can pass RQ_DASHBOARD_REDIS_URL, but since docker-compose can only give me a host, I need to pass only the host.

My case:

# docker-compose.yaml
version: "3"
services:

  rq-dashboard:
    container_name: RQ_DASHBOARD
    image: eoranged/rq-dashboard
    environment:
      - RQ_DASHBOARD_REDIS_URL=redis # <- this doesn't work because Docker can only provide the hostname.
    ports:
      - 4001:9181
    networks:
      - redis-net
    depends_on:
      - redis

  redis:
    container_name: REDIS
    image: redis:4.0.5-alpine
    command: ["redis-server", "--appendonly", "yes"]
    hostname: redis
    networks:
      - redis-net
    volumes:
      - redis-data:/data

networks:
  redis-net:

volumes:
  redis-data:

Your help is much appreciated.

[EonYang]

Find a workaround by passing a command instead of environment

command: python -m rq_dashboard -H redis

Edit: Sorry, that didn't solve it. Reopening and still waiting for help.

[EonYang]

Just realize I can pass - RQ_DASHBOARD_REDIS_URL=redis://<redis:6379> directly.

- RQ_DASHBOARD_REDIS_URL=redis://<redis:6379>