docker-swarm.yml

---
- name: Set up Docker Swarm
  hosts: localhosts
  become: true

  tasks:
    - name: Install Docker
      apt:
        name: docker.io
        state: present

    - name: Initialize Swarm
      command: docker swarm init --advertise-addr {{ 192.168.43.34}}
      register: swarm_init
      changed_when: "'already exists' not in swarm_init.stdout"

    - name: Retrieve join token
      command: docker swarm join-token -q worker
      register: join_token

  handlers:
    - name: Save join token
      copy:
        content: "{{ join_token.stdout }}"
        dest: /tmp/join_token.txt

- name: Join Swarm as worker
  hosts: swarm_workers
  become: true

  tasks:
    - name: Install Docker
      apt:
        name: docker.io
        state: present

    - name: Retrieve join token
      fetch:
        src: /tmp/join_token.txt
        dest: /tmp/join_token.txt

    - name: Join Swarm
      command: docker swarm join --token {{ lookup('file', '/tmp/join_token.txt') }} {{ hostvars['swarm_manager']['ansible_host'] }}