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

---

- name: Check if kubectl exists
  ansible.builtin.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
      ansible.builtin.command:
        cmd: "{{ 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
      ansible.builtin.command:
        cmd: >-
          {{ k3s_install_dir }}/kubectl drain {{ item }}
            --ignore-daemonsets
            --delete-local-data
            --force
      delegate_to: "{{ k3s_control_delegate }}"
      run_once: true
      when:
        - kubectl_get_nodes_result.stdout is defined
        - item in kubectl_get_nodes_result.stdout
        - hostvars[item].k3s_state is defined
        - hostvars[item].k3s_state == 'uninstalled'
      loop: "{{ ansible_play_hosts_all }}"
      become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"

    - name: Ensure uninstalled nodes are removed
      ansible.builtin.command:
        cmd: "{{ k3s_install_dir }}/kubectl delete node {{ item }}"
      delegate_to: "{{ k3s_control_delegate }}"
      run_once: true
      when:
        - kubectl_get_nodes_result.stdout is defined
        - item in kubectl_get_nodes_result.stdout
        - hostvars[item].k3s_state is defined
        - hostvars[item].k3s_state == 'uninstalled'
      loop: "{{ ansible_play_hosts_all }}"
      become: "{{ k3s_become_for_kubectl | ternary(true, false, k3s_become_for_all) }}"

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