Merge "Install Fluentd Prometheus plugin out of the box"

docker/fluentd/Dockerfile.j2

@@ -87,6 +87,7 @@ RUN chmod 755 /usr/local/bin/kolla_extend_start
         'fluent-plugin-grep',
         'fluent-plugin-grok-parser',
         'fluent-plugin-parser',
+        'fluent-plugin-prometheus',
         'fluent-plugin-rewrite-tag-filter',
     ] %}
 {% endif %}

releasenotes/notes/add-fluentd-prometheus-plugin-b5c626db667c5675.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The Prometheus plugin is now installed into the Fluentd container by
+    default.