okd/roles/openshift_control_plane/tasks/verify_api_server.yml

---
# Ensure localhost master is responding.
- name: verify API server
  command: >
    curl --silent --tlsv1.2 --max-time 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