← Back to guidesGuide

Monitor Gateway API TCPRoute and UDPRoute without cardinality sprawl

Practical golden signals for Kubernetes Gateway API v1.6 L4 traffic: connections, bytes, errors, backends, and active series without flooding Prometheus with useless labels.

A hands-on guide for Prometheus/Grafana dashboards and alerts on TCPRoute and UDPRoute: inventory, PromQL, metric relabeling, canary validation, and proof that L4 traffic is neither blind nor expensive.

Created: August 23, 2026

Published: August 23, 2026

Estimated time40 min

LevelIntermediate

Before you startA Kubernetes cluster with Gateway API and a controller exposing dataplane or gateway metrics

PlatformsLinux / Docker

WhatsApp X LinkedIn

Docker

Test rules and queries against a local Prometheus before copying them into the cluster stack.

DockerpromtoolPrometheus rule files

Test rules locally

docker run --rm -v "$PWD:/work" -w /work prom/prometheus promtool check rules gateway-l4.rules.yaml

Query TSDB status

curl -s http://localhost:9090/api/v1/status/tsdb | jq .data

Also available inMonitorizar TCPRoute y UDPRoute de Gateway API sin disparar la cardinalidad

Content locked

This guide requires both steps before full content is available.

○Click “Like” on this guide.
○Share on WhatsApp, X, LinkedIn, or copy the link.

Access is automatically unlocked as soon as both steps are completed.