kubespray/roles/kubernetes/control-plane/tasks/kubeadm-secondary.yml

---
- name: Set kubeadm_discovery_address
  set_fact:
    kubeadm_discovery_address: >-
      {%- if "127.0.0.1" in kube_apiserver_endpoint or "localhost" in kube_apiserver_endpoint -%}
      {{ first_kube_master }}:{{ kube_apiserver_port }}
      {%- else -%}
      {{ kube_apiserver_endpoint | regex_replace('https://', '') }}
      {%- endif %}
  tags:
    - facts

- name: Upload certificates so they are fresh and not expired
  command: >-
    {{ bin_dir }}/kubeadm init phase
    --config {{ kube_config_dir }}/kubeadm-config.yaml
    upload-certs
    --upload-certs
  register: kubeadm_upload_cert
  when:
    - inventory_hostname == groups['kube_control_plane']|first

- name: Parse certificate key if not set
  set_fact:
    kubeadm_certificate_key: "{{ hostvars[groups['kube_control_plane'][0]]['kubeadm_upload_cert'].stdout_lines[-1] | trim }}"
  run_once: yes
  when:
    - hostvars[groups['kube_control_plane'][0]]['kubeadm_upload_cert'] is defined
    - hostvars[groups['kube_control_plane'][0]]['kubeadm_upload_cert'] is not skipped

- name: Create kubeadm ControlPlane config
  template:
    src: "kubeadm-controlplane.{{ kubeadmConfig_api_version }}.yaml.j2"
    dest: "{{ kube_config_dir }}/kubeadm-controlplane.yaml"
    mode: 0640
    backup: yes
  when:
    - inventory_hostname != groups['kube_control_plane']|first
    - not kubeadm_already_run.stat.exists

- name: Wait for k8s apiserver
  wait_for:
    host: "{{ kubeadm_discovery_address.split(':')[0] }}"
    port: "{{ kubeadm_discovery_address.split(':')[1] }}"
    timeout: 180


- name: check already run
  debug:
    msg: "{{ kubeadm_already_run.stat.exists }}"

- name: Joining control plane node to the cluster.
  shell: >-
    if [ -f /etc/kubernetes/manifests/kube-apiserver.yaml ]; then
    {{ bin_dir }}/kubeadm reset -f --cert-dir {{ kube_cert_dir }};
    fi &&
    {{ bin_dir }}/kubeadm join
    --config {{ kube_config_dir }}/kubeadm-controlplane.yaml
    --ignore-preflight-errors=all
    --skip-phases={{ kubeadm_join_phases_skip | join(',') }}
  environment:
    PATH: "{{ bin_dir }}:{{ ansible_env.PATH }}"
  register: kubeadm_join_control_plane
  retries: 3
  throttle: 1
  until: kubeadm_join_control_plane is succeeded
  when:
    - inventory_hostname != groups['kube_control_plane']|first
    - kubeadm_already_run is not defined or not kubeadm_already_run.stat.exists