container.yml

# container.yml Syntax Version (don't change this)
version: "2"
settings:
  # Settings for the "conductor" container.
  # The Conductor container is a container used to
  # orchestrate the build of other containers in the project
  conductor:
    # Base image for the conductor container
    base: "ubuntu:xenial"
  # Title of the Project
  project_name: "ansible-container-demo"

services:
  
  # DB Backend
  redis:
    from: "redis"
    ports:
      - "6379"

  # Application
  flask:
    from: "ubuntu:xenial"
    roles:
      # Applying a role to a container
      - role: flask
    ports:
      - "5000"
    command: ["gunicorn", "--bind", "0.0.0.0:5000", "app:app", "--chdir", "/app"]
  
  # Proxy Frontend
  nginx:
    from: "ubuntu:xenial"
    roles:
      # Syntax for expressing extra role variables
      - role: "nginx"
        # These varibles are passed to the nginx config template
        nginx_proxy_host: "flask"
        nginx_proxy_port: 5000
        nginx_listen_port: 8080
    ports:
      - "8080:8080"
    command: ["nginx", "-c", "/etc/nginx/nginx_ansible.conf", "-g", "daemon off;"]