Rails App Containerization

Build a new rails application

• Download this repository (remove .git folder if cloned the repository)

• Set your desired ruby version in Dockerfile and Dockerfile_builder

• Edit docker-compose.yml to use Mysql instead of Postgres (if needed)

  • Enable Mysql image
  • Disable Postgres image

• Build the container

  docker-compose run builder bash
  

• Install the desired rails version

  gem install rails -v "7.0"
  

• Create the new application (See all options with rails new --help and customize based on it)

  rails new --database=postgresql --javascript=esbuild --css=sass .
  

• Edit config/database.yml and enter the database credentials (host: postgres, user: root, password: password)

• (Optional) Edit Dockerfile to add extra app dependencies

• Run application (Exit from previous container)

  docker-compose up app
  

  Visit http://localhost:3000

Containerize existent applications

• Download Dockerfile and docker-compose.yml

• Set your desired ruby version in Dockerfile

• Edit docker-compose.yml to use Mysql instead of Postgres (if needed)

  • Enable Mysql image
  • Disable Postgres image

• Edit config/database.yml and enter the database credentials (host: postgres, user: root, password: password)

• (Optional) Edit Dockerfile to add extra app dependencies

• Run application

  docker-compose up app
  

  Visit http://localhost:3000