Create a Docker container build for development

marnen / contraq

Contract tracker for musicians and other freelancers

MIT License

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Create a Docker container build for development #33

Closed marnen closed 6 years ago

marnen commented 6 years ago

In order to deploy to Google Cloud (if we go that route) and generally make setup easier, we should containerize the application.

[x] Install Docker (and Kitematic, probably) locally for development
[x] Get application running with Docker and/or docker-compose
[x] Check .dockerignore so we don't send everything for building
[x] Use a bind mount for dev so we don't have to rebuild the container every time we change the app, and so the DB data will persist when we rebuild the DB container
[x] Make sure we have a decent interactive shell experience
[x] Make sure we have a decent interctive debugging experience
[x] Get Docker build working on Travis
[x] Consider registering our build and setting up automatic builds from GitHub
[x] Improve layer caching

marnen commented 6 years ago

This will also make Travis builds not have to install so much stuff, I think.

marnen commented 6 years ago

Google Cloud Engine docs for Docker: https://cloud.google.com/compute/docs/containers/deploying-containers. I have no particular love (or hate) for Google Cloud; I just think that their free tier (with Docker) is most suitable for our needs.

marnen commented 6 years ago

I think I will try Alpine Linux as container OS first, and fall back to Ubuntu if that doesn't work.

marnen commented 6 years ago

Possibly helpful: https://blog.codeship.com/build-minimal-docker-container-ruby-apps/

marnen commented 6 years ago

Actually, for now, in the interests of quick development and decent base image, I think I'll use https://github.com/phusion/passenger-docker for deployment. We can always change this later.

marnen commented 6 years ago

...or not. Puma is multithreaded and may be a better choice than Passenger now. Looking at https://erudinsky.com/2017/05/15/how-to-run-rails-app-with-postgres-puma-and-nginx-in-docker for more ideas.

marnen commented 6 years ago

That tutorial looks pretty good, actually. I'll probably largely follow it.

marnen commented 6 years ago

I'm going to reduce the scope of this story. For right now, we'll just produce a Docker container for development and Travis, and I'll move the production Docker container to a separate story (multistage builds may be helpful).

marnen commented 6 years ago

We now have master being automatically built on Docker Hub.

marnen commented 6 years ago

Rats. I can't get Travis to use cache_from correctly in the compose file. See https://github.com/docker/docker-py/issues/998 and https://github.com/docker/docker-py/pull/1582 for possible reasons.

marnen commented 6 years ago

I think I may have been wrong about cache_from. It looks like I had set the environment variables improperly so that the compose file I wanted wasn't being picked up.