---
- name: "Bootstrap Docker Swarm on IPv6"
  hosts: controlnode
  become: true
  vars:
    # Explicitly defining the IPs based on network map
    mgmt_ip: "fda7:740:3e00:c721:231c:8e23:d51d:1ccb"
    data_ip: "fda7:740:3e00:403e:3a6e:fde8:ea84:d4b5"
  
  tasks:
    - name: Ensure docker is installed (standard repo)
      apt:
        name: 
          - docker.io
          - python3-docker
        state: present

    - name: Configure Docker Daemon for IPv6
      copy:
        dest: /etc/docker/daemon.json
        content: |
          {
            "ipv6": true,
            "fixed-cidr-v6": "fda7:740:3e00:docc::/64",
            "ip6tables": true,
            "experimental": true
          }
        notify: Restart Docker
    
    - name: Flush handler to apply Docker config immediately
      meta: flush_handlers

    - name: Initialise or update Docker Swarm Manager
      community.docker.docker_swarm:
        state: present
        advertise_addr: "[{{ mgmt_ip }}]"
        data_path_addr: "[{{ data_ip }}]"
      register: swarm_result

  handlers:
    - name: Restart Docker
      ansible.builtin.systemd:
        name: docker
        state: restarted