Docker for Rails Developers

Starting the Entire App with Docker Compose

We’ve just added Redis as a new service to our Compose file and configured our Rails app to talk to it. As we did this, the Rails server was already running, so we started the Redis server by itself with docker-compose run redis. However, one of the beauties of Compose is that no matter how many services we add to our application, we can manage it, in its entirety, with a single command, replacing the need for gems like Foreman.^[29]

We can stop both the Rails server and Redis server in one go with:

$ docker-compose stop

You can verify that both services are stopped by running:

$ docker-compose ps

You should see something like this:

Name                   Command               State    Ports
--------------------------------------------------------------- ...