- name: Extract Worker Join Token from Primary Master
  hosts: masters[0] # <--- Targets only the first master safely
  gather_facts: false
  tasks:
    - name: Generate worker join command
      ansible.builtin.command: kubeadm token create --print-join-command
      register: join_command_raw
      changed_when: false # Reading/generating a token text string changes no host state

    - name: Save join command globally
      ansible.builtin.set_fact:
        k8s_worker_join: "{{ join_command_raw.stdout }}"
      delegate_to: localhost
      delegate_facts: true

- name: Join Worker Nodes to Cluster
  hosts: workers
  gather_facts: false
  tasks:
    - name: Join cluster
      ansible.builtin.shell: "{{ hostvars['localhost']['k8s_worker_join'] }} >> node_joined.txt"
      args:
        chdir: $HOME
        creates: node_joined.txt