High cardinality metrics causing metric explosion

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performanceUpdated Feb 9, 2026(via Exa)

Sources

How to Configure Prometheus Metrics with Traefik - OneUptimeoneuptime.com

How to Configure Traefik Ingress with Prometheus Metrics and Tracingoneuptime.com

Technologies:

Traefiksubject

PrometheusSymptoms of this issue are visible in Prometheus metrics and logs

How to detect:

Excessive labels on Traefik metrics lead to high cardinality, causing metric explosion that can overwhelm Prometheus with storage and query performance issues.

Recommended action:

Limit the number of labels in Traefik metrics configuration. Review addEntryPointsLabels, addRoutersLabels, and addServicesLabels settings and disable unnecessary label dimensions. Avoid adding custom labels with high-cardinality values like request IDs or timestamps.