Prometheus
59 incident problems in Prometheus environments.
Read first
When the ConfigMap changed but the Pod keeps using the old valuesAn InfraTree guide that lays out the first signals to check, the CLI verification order, common misdiagnoses, and a safe recovery path when values don't refresh after a ConfigMap update because of envFrom, subPath, volume projection, or rollout trigger differences.Kubernetes3 min readWhen CoreDNS is Running but only DNS lookups failAn InfraTree guide that lays out the first signals to check, the CLI verification order, common misdiagnoses, and a safe recovery path when the CoreDNS Pod looks healthy but failures occur in the kube-dns path, upstream, node-local-dns, or policy.Kubernetes3 min readWhat to check first when CrashLoopBackOff appearsAn InfraTree guide that lays out the first signals to check, the CLI verification order, common misdiagnoses, and a safe recovery path when a Pod restarts repeatedly and the real cause is left in the previous logs and events.Kubernetes3 min read
Recommended problems
Reviewed problems first, then problems with detailed scenarios.
All problems (59)
K8S-1621A ServiceMonitor is correct and one target still reads zeroOne ServiceMonitor still shows zero targets after a namespace label update.ReviewedKubernetesBeginner6 minFreeK8S-1707A HorizontalPodAutoscaler sees metrics and one target still reads zeroAn HPA still reads zero after metric exposure was fixed.KubernetesBeginner8 minFreeK8S-1757An HPA metric appears and one autoscaler still reads zeroAn autoscaler still reads zero after the metric appeared.KubernetesBeginner8 minFreeK8S-1787An HPA metric exists and one autoscaler still sees zeroAn autoscaler still sees zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1737An HPA metric is present and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1717An HPA metric is present and one scaler still reads zeroAn autoscaler still reads zero after metrics appeared.KubernetesBeginner8 minFreeK8S-1687An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after the metric name changed.KubernetesBeginner8 minFreeK8S-1697An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after a metric migration.KubernetesBeginner8 minFreeK8S-1727An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after the metric appeared.KubernetesBeginner8 minFreeK8S-1747An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1767An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1777An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1797An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1807An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1817An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1827An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1857An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1867An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1877An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFreeK8S-1897An HPA metric is visible and one autoscaler still reads zeroAn autoscaler still reads zero after metrics became visible.KubernetesBeginner8 minFree