docker-compose.yml

version: '3' # version of docker-compose to use
# this is good for development.
# add in the docker-compose-production.yml for nginx and letsencrypt
# only tested on a single host.

services: # configuring each container
  rails:
    build: .
    volumes: 
      - '.:/app'
    command: bundle exec unicorn_rails -c config/unicorn.rb -p 3000
    restart: always
    links:
      - redis
      - db
    ports:
      - "3000:3000" 
    environment:
      - RAILS_ENV=${RAILS_ENV:-development}
      - DATABASE_URL=${DATABASE_URL:-mysql2://patterns:patterns@db/development}
      - REDIS_URL=redis://redis:6379/0
      - VIRTUAL_HOST=${PRODUCTION_SERVER:-localhost}
      - LETSENCRYPT_HOST=${PRODUCTION_SERVER:-localhost} # for letsencrypt
      - LETSENCRYPT_EMAIL=${MAIL_ADMIN:-admin@example.com}
      - LETSENCRYPT_TEST=${LETSENCRYPT_TEST:-true}
  background:
    build: .
    volumes: 
      - '.:/app'
    command: bundle exec sidekiq
    restart: always
    links:
      - redis
      - db
    environment:
      - RAILS_ENV=${RAILS_ENV:-development}
      - DATABASE_URL=${DATABASE_URL:-mysql2://patterns:patterns@db/development}
      - REDIS_URL=${REDIS_URL:-redis://redis:6379/0}
  redis:
    image: redis:alpine
    restart: always
  db: # name of our mysql container
    image: mysql:5.7 # which image to pull, in this case specifying v. 5.7
    restart: always # always restart the container after reboot
    environment: # environment variables -- mysql options in this case
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: development
      MYSQL_USER: patterns
      MYSQL_PASSWORD: patterns
    volumes: # data to map to the container
      - ./databases:/docker-entrypoint-initdb.d
      - db-datavolume:/var/lib/mysql # where to find our data autoimport any sql
volumes:
  db-datavolume: