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Build golden signals for Kubernetes HTTP APIs without cardinality sprawl

A practical flow for measuring traffic, errors, latency, and saturation with Prometheus, Grafana, and a label contract that does not burn the TSDB.

Define a label contract, create RED/USE recording rules, validate cardinality with promtool, and roll out Kubernetes API dashboards without turning every route into a series factory.

Created: July 7, 2026

Published: July 7, 2026

Estimated time40 min

LevelIntermediate

Before you startPrometheus scraping HTTP metrics or OpenTelemetry exporting compatible histograms.

PlatformsLinux / Docker

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Docker

Reproducible promtool test in a container before moving rules into CI.

Dockerrules/api-golden-signals.yamlrules/api-golden-signals.test.yaml

Validate rules with promtool in a container

docker run --rm -v "$PWD/rules:/rules" prom/prometheus:v3.8.0 promtool test rules /rules/api-golden-signals.test.yaml

Also available inMontar golden signals para APIs HTTP en Kubernetes sin disparar la cardinalidad

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