kubespray/roles/recover_control_plane/etcd/tasks/prepare.yml

---
- name: Delete old certificates
  # noqa 302 - rm is ok here for now
  shell: "rm /etc/ssl/etcd/ssl/*{{ item }}* /etc/kubernetes/ssl/etcd/*{{ item }}*"
  with_items: "{{ old_etcds.split(',') }}"
  register: delete_old_cerificates
  ignore_errors: true
  when: old_etcds is defined

- name: Fail if unable to delete old certificates
  fail:
    msg: "Unable to delete old certificates for: {{ item.item }}"
  loop: "{{ delete_old_cerificates.results }}"
  changed_when: false
  when:
    - old_etcds is defined
    - "item.rc != 0 and not 'No such file or directory' in item.stderr"

- name: Get etcd cluster members
  shell: "{{ bin_dir }}/etcdctl member list"
  register: member_list
  changed_when: false
  check_mode: no
  environment:
    - ETCDCTL_API: 3
    - ETCDCTL_CA_FILE: /etc/ssl/etcd/ssl/ca.pem
    - ETCDCTL_CERT: "/etc/ssl/etcd/ssl/admin-{{ inventory_hostname }}.pem"
    - ETCDCTL_KEY: "/etc/ssl/etcd/ssl/admin-{{ inventory_hostname }}-key.pem"
  when:
    - has_etcdctl
    - etcd_cluster_is_healthy
    - old_etcd_members is defined

- name: Remove old cluster members
  shell: "{{ bin_dir }}/etcdctl --endpoints={{ etcd_access_addresses }} member remove {{ item[1].replace(' ','').split(',')[0] }}"
  environment:
    - ETCDCTL_API: 3
    - ETCDCTL_CA_FILE: /etc/ssl/etcd/ssl/ca.pem
    - ETCDCTL_CERT: "/etc/ssl/etcd/ssl/admin-{{ inventory_hostname }}.pem"
    - ETCDCTL_KEY: "/etc/ssl/etcd/ssl/admin-{{ inventory_hostname }}-key.pem"
  with_nested:
    - "{{ old_etcd_members.split(',') }}"
    - "{{ member_list.stdout_lines }}"
  when:
    - has_etcdctl
    - etcd_cluster_is_healthy
    - old_etcd_members is defined
    - item[0] == item[1].replace(' ','').split(',')[2]