如何使用 .env 参数化 dockerfile？

Question

This does not solve my problem, as I have no escaping issues.

I have a rabbit.env :

NETWORK_NAME=uv_atp_network

and a dockerfile

version: '2.3'
networks:
  atp:
    name: $NETWORK_NAME
    external: true
services:
    rabbitmq_local:
        image: 'rabbitmq:3.6-management-alpine'
        ports:
          - '5672:5672'
          - '15672:15672'
        networks:
          - $NETWORK_NAME

Both in the same folder.

When running

@pytest.mark.usefixtures("network",)
def test_rabbit_up(client, session_scoped_container_getter):
    pass

which calls docker-compose up behind the scenes , I am getting

Service "rabbitmq_local" uses an undefined network ""

What am I doing wrong?

Answer 1

In the Compose file, you've named the network atp

networks:
  atp: # <-- you need this name
    settings: don't matter to this naming question

and so you need to use that name when you refer to it in a container definition

services:
  rabbitmq_local:
    networks:
      - atp # <-- the Compose file name of the network

Since this name is local to the Compose file, you can choose any name you want. In particular, you're allowed to name the network default , which reconfigures the default network Compose creates ; if you do this, you don't need to mention it for individual services.

networks:
  default: { external: true, name: $NETWORK_NAME }
services:
  rabbitmq_local:
    # no networks:, Compose will provide `networks: [default]` for you