openstack-ansible-os_monasca/extras/haproxy_monasca.yml

 - service:
      haproxy_service_name: monasca-api
      haproxy_backend_nodes: "{{ groups['monasca_api'] | default([]) }}"
      haproxy_ssl: "{{ haproxy_ssl }}"
      haproxy_port: "{{ monasca_api_service_port }}"
      haproxy_balance_type: http
      haproxy_backend_options:
        - "httpchk HEAD /"
 - service:
      haproxy_service_name: monasca-log-api
      haproxy_backend_nodes: "{{ groups['monasca_log_api'] | default([]) }}"
      haproxy_ssl: "{{ haproxy_ssl }}"
      haproxy_port: "{{ monasca_log_api_service_port }}"
      haproxy_balance_type: http
      haproxy_backend_options:
        - "httpchk HEAD /"