Dockerで作るシンプルなRails開発環境

docker-compose.yml

version: '2'
services:
  mysql:
    image: mysql
    volumes:
      - ./data/mysql:/var/lib/mysql
    ports:
      - "3306:3306"
    environment:
      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"

  web:
    build: .
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
    depends_on:
      - mysql

Dockerfile

FROM ruby:2.3.1

RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
RUN mkdir /myapp
WORKDIR /myapp
ADD Gemfile /myapp/Gemfile
ADD Gemfile.lock /myapp/Gemfile.lock
RUN bundle install