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OpenShift Monitoring

OpenShift ships with built-in monitoring for the cluster, which runs in the openshift-monitoring namespace. This includes Prometheus, AlertManager and Grafana.

Openshift uses node-exporter to monitor the nodes in a cluster, which has a 15s scrape internal. This can be checked using the Route exposed for Prometheus on the /config endpoint.

The scrape internal has implications on the appropriate time intervals used for the PromQL rate() and irate() functions.