---
- name: Init swarm
  when: inventory_hostname == groups.swarm_managers[0]
  become: true
  docker_swarm:
    state: present
    advertise_addr: "{{ansible_default_ipv4.address}}"
    default_addr_pool:
      - 172.17.0.0/16
      - 172.18.0.0/16
      - 172.19.0.0/16
  register: manager_swarm_facts

- when: inventory_hostname == groups.swarm_managers[0]
  set_fact:
    worker_join_token: "{{manager_swarm_facts.swarm_facts.JoinTokens.Worker}}"
    manager_join_token: "{{manager_swarm_facts.swarm_facts.JoinTokens.Manager}}"

- name: Create ingress network
  # The ingress network conflicts with my subnet and ends up causing problems,
  # so we have to set a different subnet first
  when: inventory_hostname == groups.swarm_managers[0]
  become: true
  docker_network:
    name: ingress
    driver: overlay
    ingress: true
    scope: swarm
    ipam_config:
      - subnet: 172.31.0.0/16
        gateway: 172.31.0.1
    driver_options:
      # I'm honestly not completely sure what this, but in the default
      # ingress network that's created during swarm initialization, this exists
      # and things don't seem to work without it.
      com.docker.network.driver.overlay.vxlanid_list: 4096

- name: Join swarm as managers
  when: inventory_hostname in groups.swarm_managers and inventory_hostname != groups.swarm_managers[0]
  become: true
  docker_swarm:
    state: join
    join_token: "{{hostvars[groups.swarm_managers[0]].manager_join_token}}"
    advertise_addr: "{{ansible_default_ipv4.address}}"
    remote_addrs: ["{{hostvars[groups.swarm_managers[0]].ansible_default_ipv4.address}}"]

- name: Join swarm as workers
  when: inventory_hostname in groups.swarm_workers
  become: true
  docker_swarm:
    state: join
    join_token: "{{hostvars[groups.swarm_managers[0]].worker_join_token}}"
    advertise_addr: "{{ansible_default_ipv4.address}}"
    remote_addrs: ["{{hostvars[groups.swarm_managers[0]].ansible_default_ipv4.address}}"]

- name: Add user to docker group
  become: true
  user:
    name: "{{ ansible_user }}"
    groups:
      - docker