docker-swarm.yml

---
- hosts: all
  roles:
  - name: unglaublicherdude.ansible_role_docker_engine
- hosts: manager
  tasks:
  - name: register docker info
    shell: docker info
    register: docker_info
    changed_when: false
  - name: initialize the swarm
    shell: docker swarm init --advertise-addr {{ansible_default_ipv4.address}}
    when:
    - "docker_info.stdout.find('Swarm: inactive') != -1"
    - "not hostvars['DOCKER_SWARM_TOKEN_HOLDER']"
  - name: "get docker swarm worker token"
    shell: docker swarm join-token -q worker
    register: worker_token
  - name: "get docker swarm worker token"
    shell: docker swarm join-token -q manager
    register: manager_token
  - name: add token-holder
    add_host:
      name: DOCKER_SWARM_TOKEN_HOLDER
      groups: ANSIBLE_DUMMY_HOSTS
      worker_token: "{{worker_token.stdout}}"
      manager_token: "{{manager_token.stdout}}"
      ip: "{{ansible_default_ipv4.address}}"
    when:
    - "not hostvars['DOCKER_SWARM_TOKEN_HOLDER']"

- hosts: worker
  tasks:
  - name: register docker info
    shell: docker info
    register: docker_info
    changed_when: false
  - name: "join as a worker"
    shell: "docker swarm join --token {{hostvars['DOCKER_SWARM_TOKEN_HOLDER']['worker_token']}} {{hostvars['DOCKER_SWARM_TOKEN_HOLDER']['ip']}}:2377"
    when: "docker_info.stdout.find('Swarm: inactive') != -1"
    retries: 3
    delay: 20