---
- name: Join workers to Kubernetes cluster
  hosts: workers
  become: true

  tasks:
    - name: Check if already joined
      stat:
        path: /etc/kubernetes/kubelet.conf
      register: kubelet_conf

    - name: Read join command from local file
      local_action:
        module: slurp
        src: /tmp/k8s_join_command.sh
      register: join_command_b64
      when: not kubelet_conf.stat.exists

    - name: Join cluster
      command: "{{ join_command_b64.content | b64decode | trim }}"
      when: not kubelet_conf.stat.exists