Docker get started with rails, mysql and nginx

.env

APP_PATH=/var/www
MYSQL_ROOT_PASSWORD=root
MYSQL_DATABASE=development
MYSQL_USER=user
MYSQL_PASSWORD=pass

README.md

Docker

Exemple

https://github.com/dtelaroli/docker-rails

Documentation

https://docs.docker.com/get-started/

Installation

• Docker for Windows: https://docs.docker.com/docker-for-windows/install/#install-docker-for-windows
• Docker for Ubuntu: sudo apt install docker.io
• Docker-compose: https://docs.docker.com/compose/install/#install-compose

Building docker image

docker build -t my . --build-arg USER=$USER --build-arg UID=$(id -u)

Creating Rails APP

docker run -v $PWD:/var/www/app -it my rails new .

Configuring app

docker-compose run myapp bundle install
docker-compose run myapp rails db:migrate

Running docker-compose

docker-compose up

Connecting to machine

docker run -it my bash
docker-compose run myapp bash

Cleaning

# Clean project
docker-compose down

# Clean machine
docker system prune -a

app.conf

upstream puma {
  server myapp:3000;
}

server {
  listen 80;
  server_name localhost;

  root /var/www/app/public;
  try_files $uri/index.html $uri @puma;

  location @puma {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;

    proxy_pass http://puma;
    # limit_req zone=one;
  }
}

database.yml

development:
  adapter: mysql2
  encoding: utf8
  pool: 15
  username: root
  password: root
  host: mydb
  database: development
  

docker-compose.yml

version: '3.4'
services:
  myapp:
    container_name: myapp
    image: my
    env_file: .env
    volumes:
      - bundle:/usr/local/bundle
      - $PWD:/var/www/app
    ports:
      - '3000:3000'
    links:
      - mydb
    networks: 
      - mynet
    command: rails s -b 0.0.0.0
    
  mydb:
    container_name: mydb
    image: library/mysql:5.6.22
    ports:
      - 3306:3306
    env_file: .env
    networks: 
      - mynet

  mynginx:
    container_name: mynginx
    image: nginx:alpine
    volumes:
      - ./app.conf:/etc/nginx/conf.d/default.conf
    ports:
      - '80:80'
    links:
      - myapp
    networks: 
      - mynet

volumes:
  bundle:
    name: bundle
networks: 
  mynet:
  

Dockerfile

# From one of the official ruby images
FROM ruby:2.4.3

LABEL [email protected]

ARG USER
ARG UID
ARG APP_PATH=/var/www

RUN echo "RUN env=$RAILS_ENV UID=$UID USER=$USER"

RUN addgroup --gid $UID $USER && \
  adduser --system --gid $UID --uid $UID $USER && \
  mkdir -p $APP_PATH && \
  chown -R $USER:$USER $APP_PATH /usr/local/bundle

RUN mkdir -p $APP_PATH/app && chown -R $USER:$USER $APP_PATH

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 apt-get update
RUN apt-get -y install node yarn

USER $USER
WORKDIR ${APP_PATH}/app

RUN gem install rails

CMD bash

Gemfile

gem 'mysql2'
gem 'mini_racer', platforms: :ruby