ansible-role-k3s/tasks/teardown/drain-and-remove-nodes.yml

---

- name: Check if kubectl exists
  stat:
    path: "{{ k3s_install_dir }}/kubectl"
  register: k3s_check_kubectl
  become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"

- name: Clean up nodes that are in an uninstalled state
  block:

    - name: Gather a list of nodes
      command: "{{ k3s_install_dir }}/kubectl get nodes"
      changed_when: false
      failed_when: false
      delegate_to: "{{ k3s_control_delegate }}"
      run_once: true
      register: kubectl_get_nodes_result
      become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"

    - name: Ensure uninstalled nodes are drained
      command: "{{ k3s_install_dir }}/kubectl drain {{ item }} --ignore-daemonsets --delete-local-data"
      delegate_to: "{{ k3s_control_delegate }}"
      run_once: true
      when: item in kubectl_get_nodes_result.stdout
            and hostvars[item].k3s_cluster_state is defined
            and hostvars[item].k3s_cluster_state == 'uninstalled'
      loop: "{{ play_hosts }}"
      become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"

    - name: Ensure uninstalled nodes are removed
      command: "{{ k3s_install_dir }}/kubectl delete node {{ item }}"
      delegate_to: "{{ k3s_control_delegate }}"
      run_once: true
      when: item in kubectl_get_nodes_result.stdout
            and hostvars[item].k3s_cluster_state is defined
            and hostvars[item].k3s_cluster_state == 'uninstalled'
      loop: "{{ play_hosts }}"
      become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"

  when: k3s_check_kubectl.stat.exists is defined
        and k3s_check_kubectl.stat.exists
        and k3s_control_delegate is defined
        and not ansible_check_mode