Docker + Docker-compose + Rails new

.rails-new

start new rails project with docker

README.md

To do:

docker-compose build - creating images

docker-compose up --no-start - creating containers

More about rails new command here: https://guides.rubyonrails.org/command_line.html#rails-new

docker-compose run --rm web bash -c 'bundle && bundle exec rails new . -T -f --skip-turbolinks --skip-action-cable --skip-coffee --skip-git -d postgresql && bundle --jobs=4 && bundle exec rails g rspec:install' - run bin/rails new

Following lines have to exist in database.yml file:

host: db
username: postgres

Then run: docker-compose run --rm web bin/rails db:create db:migrate db:seed

That's all!

docker-compose.yml

version: "3"

volumes:
  bundle:

services:
  db:
    image: postgres:12
    ports:
      - "5432"
    environment:
      POSTGRES_HOST_AUTH_METHOD: 'trust'

  web:
    build: .
    image: app_name/web
    command: bash -c "rm -f tmp/pids/server.pid && bin/rails server -b 0.0.0.0 -p 8080"
    volumes: &web-volumes
      - ./:/myapp
      - ~/.ssh:/root/.ssh
      - ~/.bash_history:/root/.bash_history
      - bundle:/usr/local/bundle
    ports:
      - "8080:8080"
    links:
      - db
      - spring
    environment: &web-environment
      RAILS_ENV: development
  
  spring:
    image: app_name/web
    container_name: app_name-spring
    volumes: *web-volumes
    environment: *web-environment
    command: bash -c "rm -f tmp/spring.sock && bin/spring server"

Dockerfile

FROM ruby:2.6.5-slim-buster

RUN apt-get update -qq && apt-get install -y curl
RUN curl -sL http://deb.nodesource.com/setup_12.x | bash -
RUN curl -sS http://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
RUN echo "deb http://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
RUN curl -sSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
  && echo 'deb http://apt.postgresql.org/pub/repos/apt/ buster-pgdg main' > /etc/apt/sources.list.d/pgdg.list

RUN apt-get update -qq
RUN apt-get install -y build-essential postgresql-client libpq-dev nodejs
RUN apt-get -y -o Dpkg::Options::="--force-overwrite" install yarn

RUN mkdir /myapp
WORKDIR /myapp

ADD . /myapp

Gemfile

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end

gem 'rails'
gem 'rspec-rails'