kubespray/roles/recover_control_plane/master/tasks/main.yml

---
- name: Wait for apiserver
  shell: "{{ bin_dir }}/kubectl get nodes"
  environment:
    - KUBECONFIG: "{{ ansible_env.HOME | default('/root') }}/.kube/config"
  register: apiserver_is_ready
  until: apiserver_is_ready.rc == 0
  retries: 6
  delay: 10
  changed_when: false

- name: Delete old kube-master nodes from cluster
  shell: "{{ bin_dir }}/kubectl delete node {{ item }}"
  environment:
    - KUBECONFIG: "{{ ansible_env.HOME | default('/root') }}/.kube/config"
  with_items: "{{ old_kube_masters.split(',') }}"
  register: delete_old_kube_masters
  failed_when: false
  when: old_kube_masters is defined

- name: Fail if unable to delete old kube-master nodes from cluster
  fail:
    msg: "Unable to delete old kube-master node: {{ item.item }}"
  loop: "{{ delete_old_kube_masters.results }}"
  changed_when: false
  when:
    - old_kube_masters is defined
    - "item.rc != 0 and not 'NotFound' in item.stderr"