As a developer I’m used to have at least 2 environments of all projects - development and production. Since I’ve been using Docker this routine seemed to be more comfortable until …
What if I want to run my project simultaneously in both environments? Boom, el problem! Why? Let’s dive into that.
When I started using Docker and I get too far too use docker-compose I’ve created my first docker-compose.yml file. Then I used to happily run this:
docker-compose up
and my project was running. Amazing.
That was cool for dev environment. Once I’ve needed to create production set-up I created new file docker-compose.prod.yml and when I wanted to run production set-up I’ve used to run this:
docker-compose -f docker-compose.yml -f docker-compose.prod.yml up
and Docker took default file + my production file, merged them into one configuration and project was up in production set-up.
But what if I want to have these set-ups running side by side? When you run these two commands in two terminals
docker-compose up
and
docker-compose -f docker-compose.yml -f docker-compose.prod.yml up
Docker will end up with errors like conflict names, containers etc. I was like
Basically all you need to know is you have to create 2 separate docker files (so NOT one as base and one as override). In these files you need to name your services uniquely and then run docker-compose with -p param with project name for each environment. So step by step:
docker-compose.dev.ymland second docker-compose.prod.yml.redis-PROJECT_NAME-dev so i.e.redis:
image: redis:3.2
container_name: redis-my-app-dev
Even your app has to have unique name:
app:
container_name: my-app-dev
docker-compose -f docker-compose.prod.yml -p my-app-prod up