gistfile1.txt

version: '2'

services:
  blog_backend:
    image: serjs/blog_backend
    environment:
      - MONGO_HOST=db
    depends_on:
      - db
    environment:
      - "constraint:provider==amazonec2"
      - "health"

  blog_ui:
    image: serjs/blog_ui
    env_file:
      - blog-backend-vars.env
    ports:
      - "80:9292"
    depends_on:
      - blog_backend
    environment:
      - "health"

  db:
    image: serjs/mongodb
    environment:
      - "constraint:role==db"
      - "health"