Add prometheus target template for rgw exporter

Author: seunghun1ee

etc/kayobe/kolla/config/prometheus/prometheus.yml.d/80-radosgw-exporter.yml

@@ -0,0 +1,21 @@
+# yamllint disable-file
+---
+{% if stackhpc_enable_radosgw_usage_exporter | bool %}
+{% raw %}
+scrape_configs:
+  - job_name: ceph_radosgw_usage_exporter
+    honor_labels: true
+    scrape_interval: 15s
+    metric_relabel_configs:
+    - replacement: ${1}
+      source_labels: [owner,user]
+      target_label: tenant_id
+      separator: ""
+      regex: (.+)
+    static_configs:
+      - targets:
+      {% for host in groups['monitoring'] %}
+        - "{{ 'api' | kolla_address(host) | put_address_in_context('url') }}:{% endraw %}{{ stackhpc_radosgw_usage_exporter_port }}{% raw %}"
+      {% endfor %}
+{% endraw %}
+{% endif %}

etc/kayobe/stackhpc-monitoring.yml

@@ -58,3 +58,4 @@ redfish_exporter_target_address: "{{ ipmi_address }}"
 # Enabling this will result in templating radosge_usage_exporter endpoint as
 # Prometheus scrape targets during deployment.
 stackhpc_enable_radosgw_usage_exporter: false
+stackhpc_radosgw_usage_exporter_port: 9242