Setting up Docker for your Ruby and Rails environment.
You can still setup Ruby, PostgreSQL, Redis and the works up on your local machine if you'd prefer developing that way. Doing it with Docker just means you don't have to have any of that installed.
Get your master.key file and put it in the config folder.
docker compose run --rm rails -- bin/setup
Run the application and access it on http://localhost:3001
docker compose up -d
View the logs.
docker compose logs -f
Add debugger on a line you would like to debug, then attach to a container to investigate. Detach from the container with ctrl + p, ctrl + q.
docker container ls
docker attach rails_dockerize-rails-1
To run any of the Rails commands, you'll have to prepend docker compose run --rm rails to the command.
docker compose run --rm rails bin/rails c
Or just connect to the container and then run any of the Rails commands.
docker compose exec rails bash
bin/rails c
To run tests.
docker compose exec -e RAILS_ENV=test rails bash
bin/rails test
Stop the application.
docker compose stop
To upgrade Rails, in Gemfile change gem 'rails', '~> 7.0.0'.
docker compose run --rm -u root rails bash
git rm Gemfile.lock
bundle install
bin/rails app:update
bin/rails db:migrate
To build or rebuild your Docker image after Dockerfile or Gemfile updates.
docker volume ls
docker volume rm rails_dockerize_gem_cache
docker compose build
docker build --build-arg RUBY_VERSION=3.1.2 --build-arg BUNDLER_VERSION=2.3.13 --file Dockerfile --tag rails_dockerize_production --target production .
These are the files of interest that need to be added or altered.
- Dockerfile
- docker-compose.yml
- docker-entrypoint.sh
- .dockerignore
- Gemfile
- Procfile.dev
- bin/setup
- bin/dev
- config/cable.yml
- config/database.yml
- .env.template
If you run into this error when running docker compose up, just run docker compose up again. I need to find a way around this. 🤔
Error response from daemon: failed to mkdir /var/lib/docker/volumes/rails_dockerize_bundle/_data/actionmailer-7.0.3/lib/action_mailer: mkdir /var/lib/docker/volumes/rails_dockerize_bundle/_data/actionmailer-7.0.3/lib/action_mailer: file exists