Custom metrics

Coroot-cluster-agent can scrape custom metrics exposed by an application in the Prometheus format. So far, it supports only Kubernetes service discovery.

Kubernetes service discovery

If a pod exposes metrics on a specific endpoint (like /metrics), you can annotate the pod to enable scraping by coroot-cluster-agent.

For example, to enable metrics scraping, add the following annotations to your pod:

metadata:
  annotations:
    coroot.com/scrape-metrics: 'true'
    coroot.com/metrics-port: '8080'
    coroot.com/metrics-path: '/metrics' # optional
    coroot.com/metrics-scheme: 'http' # optional

This configuration tells coroot-cluster-agent to scrape metrics from port 8080 and the /metrics path.

Each scraped metric will be annotated with the pod and namespace labels, allowing you to filter and aggregate metrics efficiently.