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Cut kube-state-metrics CustomResourceState noise without breaking alerts

How to trim custom resource metrics and labels with a measurable canary before Prometheus, dashboards, and alerts start lying.

A practical guide to reducing kube-state-metrics and CustomResourceState cardinality with allowlists, metricRelabelings, impact PromQL, and rollback gates.

Created: August 13, 2026

Published: August 13, 2026

Estimated time40 min

LevelIntermediate

Before you startAccess to the kube-state-metrics manifest or Helm values

PlatformsLinux / Docker

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Linux

Validation from a workstation with kubectl, promtool, and access to the cluster Prometheus.

kubectlcurljqoptional promtool

Measure current series

curl -s http://prometheus:9090/api/v1/status/tsdb | jq '.data.seriesCountByMetricName[:20]'

Inspect kube-state-metrics logs

kubectl -n observability logs deploy/kube-state-metrics --tail=80

Validate rules before the change

promtool check rules rules/*.yaml

Also available inReducir ruido de kube-state-metrics CustomResourceState sin romper alertas

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