Tag: Prometheus
Problems with scraping, rule evaluation, or querying Prometheus data.
| ID | Title | Description | Category | Technology | Tags |
|---|---|---|---|---|---|
| prequel-2025-0002 Medium Impact: 7/10 Mitigation: 3/10 | Envoy metrics scraping failure with unexpected EOF | Prometheus is failing to scrape and write Envoy metrics from Istio sidecars due to an unexpected EOF error. This occurs when trying to collect metrics from services that don't have proper protocol selection configured in their Kubernetes Service definition | Service Mesh Monitoring | prometheus | PrometheusIstioEnvoyMetricsService MeshKubernetes |
| prequel-2025-0075 Low Impact: 2/10 Mitigation: 5/10 | Prometheus Config Reload Failed | The **prometheus-config-reloader** sidecar (used by the Prometheus Operator / kube-prometheus-stack) detected a change in the ConfigMap/Secret but cannot POST to the Prometheus `/-/reload` endpoint. It logs repeatedly: ``` Failed to trigger reload. Retrying. ``` While the main Prometheus container keeps serving traffic, **new scrape configs, alerting rules, and recording rules are NOT applied**, leaving the instance frozen on an outdated configuration set. | Prometheus Problems | prometheus | Prometheus |