Docker Swarm cluster setup with Docker in Docker

docker-compose.yml

version: "2"
services:
  portainer:
    image: portainer/portainer:latest
    container_name: "portainer-app"
    command: -H unix:///var/run/docker.sock
    networks:
      - portainer
    volumes:
      - /tmp/manager_run/docker.sock:/var/run/docker.sock

  manager1:
    image: docker:dind
    privileged: true
    hostname: manager1
    volumes:
      - /tmp/manager_run:/var/run
    networks:
      - swarm
  manager2:
    image: docker:dind
    privileged: true
    hostname: manager2
    networks:
      - swarm
  worker1:
    image: docker:dind
    privileged: true
    hostname: worker1
    networks:
      - swarm
  worker2:
    image: docker:dind
    privileged: true
    hostname: worker2
    networks:
      - swarm

networks:
  portainer:
    driver: bridge
  swarm:
    driver: bridge