Drone Swarm deployment stack and example pipeline

.drone.yml

pipeline:
  test:
    image: akalipetis/ci:17.07.0_1.16.1
    environment:
      - DOCKER_HOST=tcp://docker:2375
    commands:
      - docker-compose run web python tests.py

  build:
    image: akalipetis/ci:17.07.0_1.16.1
    environment:
      - DOCKER_HOST=tcp://docker:2375
    commands:
      - docker login --username $DOCKER_USERNAME --password $DOCKER_PASSWORD
      - docker-compose build
      - docker-compose push
    secrets:
      - source: docker-username
        target: docker_username
      - source: docker-password
        target: docker_password
    when:
      branch: master

  deploy:
    image: akalipetis/ci:17.07.0_1.16.1
    commands:
      - docker stack deploy -c docker-compose.yml my-stack
    when:
      branch: master
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock

services:
  docker:
    image: docker:18.03-dind
    command: [ "--storage-driver=aufs", "--tls=false" ]
    privileged: true
    volumes:
      - /mnt/drone-dind:/var/lib/docker

stack.yml

version: '3.5'

services:
  drone-server:
    image: drone/drone:0.8

    ports:
      - 80:8000
    volumes:
      - drone:/var/lib/drone/
    environment:
      - DRONE_OPEN=true
      - DRONE_HOST=${DRONE_HOST}
      - DRONE_GITHUB=true
      - DRONE_GITHUB_CLIENT=${DRONE_GITHUB_CLIENT}
      - DRONE_GITHUB_SECRET=${DRONE_GITHUB_SECRET}
      - DRONE_SECRET=a-secret-here
      - DRONE_ADMIN=<repo_username>

  drone-agent:
    image: drone/agent:0.8
    command: agent
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      - DRONE_SERVER=drone-server:9000
      - DRONE_SECRET=a-secret-here

volumes:
  drone: