kubespray/roles/remove-node/remove-etcd-node/tasks/main.yml

---
- name: Lookup node IP in kubernetes
  command: >
    {{ kubectl }} get nodes {{ node }}
    -o jsonpath-as-json='{.status.addresses[?(@.type=="InternalIP")].address}'
  register: k8s_node_ips
  changed_when: false
  when:
  - groups['kube_control_plane'] | length > 0
  - ip is not defined
  - access_ip is not defined
  delegate_to: "{{ groups['kube_control_plane'] | first }}"

- name: Remove etcd member from cluster
  environment:
    ETCDCTL_API: "3"
    ETCDCTL_CERT: "{{ kube_cert_dir + '/etcd/server.crt' if etcd_deployment_type == 'kubeadm' else etcd_cert_dir + '/admin-' + groups['etcd'] | first + '.pem' }}"
    ETCDCTL_KEY: "{{ kube_cert_dir + '/etcd/server.key' if etcd_deployment_type == 'kubeadm' else etcd_cert_dir + '/admin-' + groups['etcd'] | first + '-key.pem' }}"
    ETCDCTL_CACERT: "{{ kube_cert_dir + '/etcd/ca.crt' if etcd_deployment_type == 'kubeadm' else etcd_cert_dir + '/ca.pem' }}"
    ETCDCTL_ENDPOINTS: "https://127.0.0.1:2379"
  delegate_to: "{{ groups['etcd'] | first }}"
  block:
  - name: Lookup members infos
    command: "{{ bin_dir }}/etcdctl member list"
    register: etcd_members
    changed_when: false
    check_mode: false
    tags:
    - facts
  - name: Remove member from cluster
    vars:
      node_ip: "{{ ip if ip is defined else (access_ip if access_ip is defined else (k8s_node_ips.stdout | from_json)[0]) }}"
    command:
      argv:
      - "{{ bin_dir }}/etcdctl"
      - member
      - remove
      - "{{ ((etcd_members.stdout_lines | select('contains', '//' + node_ip + ':'))[0] | split(','))[0] }}"
    register: etcd_removal_output
    changed_when: "'Removed member' in etcd_removal_output.stdout"