Dockerized Rails 6

Created on Ubuntu 20.04

This is a minimal example for a Dockerized Rails project with the following technologies

• Ruby 2.7.2
• Rails 6.0.3.3
• PostgreSQL 13.0
• Redis 6.0.8
• docker-compose 1.27.4
• Slim-Buster base image

How to

• Install Docker Compose https://docs.docker.com/compose/install/
• Clone repo
• Create a .env from .env.template. Configure .env.docker but keep the DATABASE_HOST as db.
• Configure database config-docker/init.sql to be consistent with .env
• $ docker-compose up (-d to begin build in background) This can take a few minutes
• Once images to come online run $ docker-compose exec web bundle exec rake db:setup db:migrate to initialize your virtual database.
• Navigate to http://localhost:3000/ and confirm you see Rails version: 6.0.3.3 and Ruby version: ruby 2.7.2p137

Links

• https://digitalocean.com/community/tutorials/containerizing-a-ruby-on-rails-application-for-development-with-docker-compose
• https://gorails.com/setup/ubuntu/20.04
• https://guides.rubyonrails.org/getting_started.html
• https://github.com/ledermann/docker-rails (More complete and robust than this repo, similar functionality)

These pages were helpful guides on getting setup. Thank you to the respective authors.