Configure prometheus-openstack-exporter to use internal endpoints

Change-Id: Ia134a518b63bb59cfad631cc488181f5245160e6

ansible/group_vars/all.yml

@@ -1024,6 +1024,7 @@ prometheus_openstack_exporter_interval: "60s"
 prometheus_elasticsearch_exporter_interval: "60s"
 prometheus_cmdline_extras:
 prometheus_ceph_mgr_exporter_endpoints: []
+prometheus_openstack_exporter_endpoint_type: "internal"
 
 ############
 # Vitrage

ansible/roles/prometheus/templates/prometheus-openstack-exporter.json.j2

 {
-    "command": "/opt/openstack-exporter/openstack-exporter --os-client-config=/etc/openstack/clouds.yml --web.listen-address={{ api_interface_address | put_address_in_context('url') }}:{{ prometheus_openstack_exporter_port }} default",
+    "command": "/opt/openstack-exporter/openstack-exporter --endpoint-type={{ prometheus_openstack_exporter_endpoint_type }} --os-client-config=/etc/openstack/clouds.yml --web.listen-address={{ api_interface_address | put_address_in_context('url') }}:{{ prometheus_openstack_exporter_port }} default",
     "config_files": [
         {
             "source": "{{ container_config_directory }}/clouds.yml",

releasenotes/notes/openstack-exporter-endpoint-type-7c687da172986fb3.yaml

+---
+upgrade:
+  - |
+    The Prometheus OpenStack exporter now uses internal endpoints to
+    communicate with OpenStack services, to match the configuration of other
+    services deployed by Kolla Ansible. Using public endpoints can be retained
+    by setting the ``prometheus_openstack_exporter_endpoint_type`` variable to
+    ``public``.
+fixes:
+  - |
+    The Prometheus OpenStack exporter now uses internal endpoints to
+    communicate with OpenStack services, to match the configuration of other
+    services deployed by Kolla Ansible.