- name: Definir hostname único por ordem de inventário
  hosts: workers
  become: yes
  tasks:
    - name: Definir hostname como ubuntu-0, ubuntu-1, etc.
      hostname:
        name: "ubuntu-{{ ansible_play_hosts.index(inventory_hostname) }}"

- name: Join Kubernetes cluster
  shell: "{{ hostvars['master1']['kubeadm_join_command'] }}"
  when: hostvars['master1']['kubeadm_join_command'] is defined