docker-compose run does not set links

Question

I have a docker-compose.yml file along the lines of:

analytics:
    build: .
    links:
    - mongo:mongo
    ports:
    - 80:80
mongo:
    build: docker_containers/mongo
    expose:
    - 27017

Running docker-compose up creates a link in /etc/hosts to the mongo service. However, running docker-compose run analytics bash does not create the link -- I checked the /etc/hosts file.

The docs of docker-compose do not mention anything about this, so I'm confused.

1. Why isn't the link set when using run ?
2. How can I achieve this?

Answer 1

My take on the answers:

1. It's a bug.
2. See if it's fixed in an unreleased version of docker-compose or create an issue asking that the bug be fixed .

Answer 2

我只回答问题编号2.使用docker-compose run启动整个环境，然后在分析容器中执行docker exec

docker exec -ti $analytics_container_id bash