okd/roles/openshift_control_plane/handlers/main.yml

---
- name: restart master
  command: /usr/local/bin/master-restart "{{ item }}"
  with_items:
  - api
  - controllers
  when:
  - not (master_api_service_status_changed | default(false) | bool)
  notify:
  - verify API server

- name: verify API server
  # Using curl here since the uri module requires python-httplib2 and
  # wait_for port doesn't provide health information.
  command: >
    curl --silent --tlsv1.2
    --cacert {{ openshift.common.config_base }}/master/ca-bundle.crt
    {{ openshift.master.api_url }}/healthz/ready
  args:
    # Disables the following warning:
    # Consider using get_url or uri module rather than running curl
    warn: no
  register: l_api_available_output
  until: l_api_available_output.stdout == 'ok'
  retries: 120
  delay: 1
  changed_when: false