c12s-kubespray/roles/remove-node/remove-etcd-node/tasks/main.yml

---
- name: Lookup node IP in kubernetes
  shell: >-
    {{ bin_dir }}/kubectl get nodes {{ node }}
    -o jsonpath='{range.status.addresses[?(@.type=="InternalIP")]}{.address}{"\n"}{end}'
  register: remove_node_ip
  when:
    - inventory_hostname in groups['etcd']
    - ip is not defined
    - access_ip is not defined
  delegate_to: "{{ groups['etcd']|first }}"
  failed_when: false

- name: Set node IP
  set_fact:
    node_ip: "{{ ip | default(access_ip | default(remove_node_ip.stdout)) | trim }}"
  when:
    - inventory_hostname in groups['etcd']

- name: Make sure node_ip is set
  assert:
    that: node_ip is defined and node_ip | length > 0
    msg: "Etcd node ip is not set !"
  when:
    - inventory_hostname in groups['etcd']

- name: Lookup etcd member id
  shell: "{{ bin_dir }}/etcdctl member list | grep {{ node_ip }} | cut -d, -f1"
  register: etcd_member_id
  ignore_errors: true  # noqa ignore-errors
  changed_when: false
  check_mode: no
  tags:
    - facts
  environment:
    ETCDCTL_API: 3
    ETCDCTL_CERT: "{{ etcd_cert_dir }}/admin-{{ groups['etcd']|first }}.pem"
    ETCDCTL_KEY: "{{ etcd_cert_dir }}/admin-{{ groups['etcd']|first }}-key.pem"
    ETCDCTL_CACERT: "{{ etcd_cert_dir }}/ca.pem"
    ETCDCTL_ENDPOINTS: "https://{{ hostvars[groups['etcd']|first]['etcd_access_address'] |
                                   default(hostvars[groups['etcd']|first]['ip']) |
                                   default(hostvars[groups['etcd']|first]['fallback_ips'][groups['etcd']|first]) }}:2379"
  delegate_to: "{{ groups['etcd']|first }}"
  when: inventory_hostname in groups['etcd']

- name: Remove etcd member from cluster
  command: "{{ bin_dir }}/etcdctl member remove {{ etcd_member_id.stdout }}"
  register: etcd_member_in_cluster
  changed_when: false
  check_mode: no
  tags:
    - facts
  environment:
    ETCDCTL_API: 3
    ETCDCTL_CERT: "{{ etcd_cert_dir }}/admin-{{ groups['etcd']|first }}.pem"
    ETCDCTL_KEY: "{{ etcd_cert_dir }}/admin-{{ groups['etcd']|first }}-key.pem"
    ETCDCTL_CACERT: "{{ etcd_cert_dir }}/ca.pem"
    ETCDCTL_ENDPOINTS: "https://{{ hostvars[groups['etcd']|first]['etcd_access_address'] |
                                   default(hostvars[groups['etcd']|first]['ip']) |
                                   default(hostvars[groups['etcd']|first]['fallback_ips'][groups['etcd']|first]) }}:2379"
  delegate_to: "{{ groups['etcd']|first }}"
  when:
    - inventory_hostname in groups['etcd']
    - etcd_member_id.stdout | length > 0

# Delete node from kubeadm-config
- name: Update kubeadm-config configmap removing control-plane no longer existing endpoints
  vars:
    kubeadm_config_cm_content: "{{ lookup('kubernetes.core.k8s', kind='ConfigMap', namespace='kube-system', resource_name='kubeadm-config', kubeconfig=keos_kubeconfig_path) }}"
  kubernetes.core.k8s:
    kubeconfig: "{{ keos_kubeconfig_path }}"
    definition:
      api_version: v1
      kind: ConfigMap
      metadata:
        name: kubeadm-config-test
        namespace: default
      data:
        ClusterStatus: "{{ kubeadm_config_cm_content.data.ClusterStatus | regex_replace( node |default(kube_node)  + ':\n' + ' *advertiseAddress: ([0-9]{1,3}.){3}[0-9]{1,3}\n' + ' *bindPort: [0-9]{1,5}' , '') }}"