configure custom prometheus metrics adoc

Author: parametalol

_topic_maps/_topic_map.yml

@@ -192,6 +192,8 @@ Topics:
   File: managing-preview-features
 - Name: Configuring and integrating the RHACS plugin with Red Hat Developer Hub
   File: configuring-and-integrating-the-rhacs-plugin-with-red-hat-developer-hub
+- Name: Configuring Custom Prometheus metrics
+  File: configure-custom-prometheus-metrics
 ---
 Name: Operating
 Dir: operating

configuration/configure-custom-prometheus-metrics.adoc

@@ -0,0 +1,48 @@
+[id="configure-custom-prometheus-metrics"]
+= Configuring custom Prometheus metrics
+include::modules/common-attributes.adoc[]
+:context: configure-custom-prometheus-metrics
+
+toc::[]
+
+[role="_abstract"]
+With {product-title}, you can enable some Prometheus metrics to be exposed on the `/metrics` path of the central API endpoint.
+
+The available metric categories include:
+
+* Image vulnerabilities.
+
+Each category is configured with a data gathering period and a list of metrics. A metric is associated with a set of labels.
+
+[NOTE]
+====
+The `/metrics` path is accessible for API tokens with Administration resource view permissions. The values of the labels are subject to Scoped Access Control.
+====
+
+The currently enabled metrics, if any, are shown on the *System Configuration* page of the *Platform Configuration* section of the {product-title} UI. In edit mode, the UI allows you to enable or disable one of the predefined metrics.
+
+The `/v1/config` API allows for configuring metrics with custom metric names and a custom set of labels.
+
+Accepted image vulnerability labels:
+
+* Cluster
+* Namespace
+* Deployment
+* IsPlatformWorkload
+* ImageID
+* ImageRegistry
+* ImageRemote
+* ImageTag
+* Component
+* ComponentVersion
+* OperatingSystem
+* CVE
+* CVSS
+* Severity
+* SeverityV2
+* SeverityV3
+* IsFixable
+
+[role="_additional-resources"]
+.Additional resources
+* xref:modules/rbac-resource-definitions.adoc[Resource definitions]