This sets up docker for rails with nginx, postgres, redis, sidekiq, and action_cable, # rails 6.1 # ruby 2.7.2 # required gems: pg, redis, sidekiq # requires config/sidekiq.yml config/initializers/sidekiq.rb cable/config.ru

rails-docker

# rails app:template LOCATION='https://gist.github.com/davidtolsma/3af8f8961abe3a635e41776fe2f3af54/raw'

# This sets up docker for rails with nginx, postgres, redis, sidekiq, and action_cable

# rails 6.1
# ruby 2.7.2
# required gems: pg, redis, sidekiq
# requires config/sidekiq.yml config/initializers/sidekiq.rb cable/config.ru

create_file 'docker/nginx/Dockerfile' do <<~YAML
YAML
end

inject_into_file 'docker/nginx/Dockerfile' do <<~YAML
# ./docker/web/Dockerfile
# Base image:
FROM nginx
# Install dependencies
RUN apt-get update -qq && apt-get -y install apache2-utils

# establish where Nginx should look for files
ENV RAILS_ROOT /app

# Set our working directory inside the image
WORKDIR $RAILS_ROOT

# create log directory
RUN mkdir -p log

# copy over static assets
COPY public public/

# Copy Nginx config template
COPY docker/nginx/nginx.conf /tmp/docker.nginx

# substitute variable references in the Nginx config template for real values from the environment
# put the final config in its place
RUN envsubst '$RAILS_ROOT' < /tmp/docker.nginx > /etc/nginx/conf.d/default.conf

EXPOSE 80

# Use the "exec" form of CMD so Nginx shuts down gracefully on SIGTERM (i.e. `docker stop`)
CMD [ "nginx", "-g", "daemon off;" ]
YAML
end


create_file 'docker/nginx/nginx.conf' do <<~YAML
YAML
end

inject_into_file 'docker/nginx/nginx.conf' do <<~YAML
upstream app {
    server app:3000 fail_timeout=0;
}

server {
    listen 80;
    server_name localhost;

    root /app/public;

    location / {
        proxy_pass http://app;
        proxy_set_header  Host $host;
        proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header  X-Forwarded-Proto $scheme;
        proxy_set_header  X-Forwarded-Port $server_port;
        proxy_set_header  X-Forwarded-Host $host;
    }

    location /cable {
        proxy_pass         http://app;
        proxy_http_version 1.1;
        proxy_set_header   Upgrade $http_upgrade;
        proxy_set_header   Connection "upgrade";
        proxy_set_header   Host $http_host;
        break;
    }

    error_page 500 502 503 504 /500.html;
    client_max_body_size 4G;
    keepalive_timeout 10;
}
YAML
end


create_file 'docker/postgres/Dockerfile' do <<~YAML
YAML
end

inject_into_file 'docker/postgres/Dockerfile' do <<-YAML
FROM postgres
YAML
end


create_file 'docker/rails/Dockerfile' do <<~YAML
YAML
end

inject_into_file 'docker/rails/Dockerfile' do <<-YAML
FROM ruby:2.7.2

WORKDIR /app

RUN apt-get update && apt-get install -y \
  curl \
  build-essential \
  libpq-dev && \
  curl -sL https://deb.nodesource.com/setup_10.x | bash - && \
  curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
  echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
  apt-get update && apt-get install -y nodejs yarn

COPY Gemfile .
# COPY Gemfile.lock .
RUN gem install bundler
RUN gem update bundler
RUN bundle install --jobs 5

COPY package.json .
COPY yarn.lock .
RUN yarn install

EXPOSE 3000
CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]
YAML
end


create_file 'docker/redis/Dockerfile' do <<~YAML
YAML
end

inject_into_file 'docker/redis/Dockerfile' do <<-YAML
FROM redis:5-alpine
YAML
end


create_file 'docker-compose.yml' do <<~YAML
  version: "3.8"
  services:
YAML
end

inject_into_file 'docker-compose.yml' do <<-YAML
  db:
    container_name: db
    image: "postgres"
    build:
      context: .
      dockerfile: ./docker/postgres/Dockerfile
    ports:
      - 5432:5432
    volumes:
      - "postgres:/var/lib/postgresql/data"
    restart: always
    environment:
      POSTGRES_PASSWORD: example
      POSTGRES_USER: user
      POSTGRES_DB: app

  YAML
end

inject_into_file 'docker-compose.yml' do <<-YAML
  app:
    container_name: app
    image: "rails"
    build: 
      context: .
      dockerfile: ./docker/rails/Dockerfile
    # command: 'bash -c ''bundle exec puma -C config/puma.rb'''
    command: /bin/bash -c "rm -f /tmp/server.pid && bundle exec rails server -b 0.0.0.0 -P /tmp/server.pid"
    volumes:
      - ".:/app"
    ports:
      - "3000:3000"
    depends_on:
      - db
      - redis
      - sidekiq
      - sidekiq_redis
    environment:
      DB_USER: user
      DB_NAME: app
      DB_PASSWORD: example
      DB_HOST: db

   YAML
end
   
inject_into_file 'docker-compose.yml' do <<-YAML
  http:
    container_name: http
    image: "nginx"
    ports:
      - 80:80
      - 443:443
    depends_on:
      - app
    build: 
      context: .
      dockerfile: ./docker/nginx/Dockerfile
    # # command: /bin/bash -c "rm -f /tmp/server.pid && bundle exec rails server -b 0.0.0.0 -P /tmp/server.pid"
    restart: always
    volumes:
      - ".:/app"

   YAML
end


inject_into_file 'docker-compose.yml' do <<-YAML
  redis:
    container_name: redis
    image: "redis"
    build: 
      context: .
      dockerfile: ./docker/redis/Dockerfile
    command: redis-server
    ports:
      - "6379:6379"
    volumes:
      - "redis:/data"

   YAML
end

inject_into_file 'docker-compose.yml' do <<-YAML
  sidekiq_redis:
    container_name: sidekiq_redis
    image: "redis"
    build: 
      context: .
      dockerfile: ./docker/redis/Dockerfile
    command: "redis-server --port 6380"
    ports:
      - "6380:6380"
    volumes:
      - "sidekiq_redis:/data"

   YAML
end


inject_into_file 'docker-compose.yml' do <<-YAML
  sidekiq:
    container_name: sidekiq
    image: "sidekiq"
    build: 
      context: .
      dockerfile: ./docker/rails/Dockerfile
    command: bundle exec sidekiq -C config/sidekiq.yml
    depends_on:
      - db
      - sidekiq_redis
    volumes:
      - '.:/app'

   YAML
end


inject_into_file 'docker-compose.yml' do <<-YAML
  cable:
    container_name: cable
    image: "cable"
    build: 
      context: .
      dockerfile: ./docker/rails/Dockerfile
    command: puma -p 28080 cable/config.ru
    depends_on:
      - redis
    ports:
      - '28080:28080'
    volumes:
      - '.:/app'

   YAML
end


inject_into_file 'docker-compose.yml' do <<-YAML
volumes:
  redis:
  sidekiq_redis:
  postgres:
   YAML
end