Comment 5 for bug 1998227

Looks like the haproxy backend is configured with ctlplane ip

backend glance_api_internal_be
  mode http
  option httpchk GET /healthcheck
  server overcloud-controller-0.ctlplane.localdomain 192.168.24.7:9293 check fall 5 inter 2000 rise 2
  server overcloud-controller-1.ctlplane.localdomain 192.168.24.25:9293 check fall 5 inter 2000 rise 2
  server overcloud-controller-2.ctlplane.localdomain 192.168.24.15:9293 check fall 5 inter 2000 rise 2

https://github.com/openstack/tripleo-heat-templates/blob/master/overcloud-resource-registry-puppet.j2.yaml#L118