Incident Library?

API · MCP 한국어

Incident Library?

API · MCP 한국어

Root cause ?

Certificate or credential expiry

인증서·자격 증명 만료 · certificate-expiry

6 cases · 2021 to 2026

Component ?Kubernetes API server 3 kubelet 2 Node pool 2 Admission webhook 1 Calico 1 Cluster autoscaler 1 etcd 1 GKE control plane 1 Managed Kubernetes control plane and provider API 1 Policy engine 1 RBAC and service accounts 1

Contributing factor ?Unreviewed defaults 2 Change with a delayed effect 1 Ignored early signal 1 Unknown limit 1 Limited debug access 1 Monitoring blind spot 1 No alert on limit 1 Single point of failure 1 Deferred upgrades 1

Symptom ?Control plane unresponsive 3 Deploys failing 3 Container crash loop 2 Credentials unavailable 2 Autoscaler misbehaviour 1 Scale-up failure 1 Control plane lag 1 High error rate 1 Service outage 1 Stale or inconsistent API reads 1

Cases

IL-0158 An expired credential caused authentication failures that stopped LKE and LKE-E from deploying clusters and nodes in all regions, which also blocked node recycling and cluster autoscalingLinode · 2026
IL-0183 kubeadm's one-year leaf certificates expired, so kube-apiserver could not reach etcd, restarted in a loop and left the cluster unreachableckck803 · 2026
IL-0156 Revoking old certificates after a rotation left a certificate key mismatch between API endpoints and the cluster controller, and LKE cluster management and autoscaling in Atlanta returned 5xx errorsLinode · 2025
IL-0107 Kyverno stuck in a crash loop behind a webhook with failurePolicy fail blocked every change to Kubernetes Service objects for 88 minutesDFDS · 2022
IL-0113 The managed GKE control plane of Webhook Relay's main cluster failed because its API server certificates had never been rotated, and a manual credential rotation reported success without taking effectWebhook Relay · 2022
IL-0184 JupyterHub's KubeSpawner could not create containers and kubectl was refused because the API server and other internal certificates of a kubeadm cluster had expireddbhang · 2021

View on the graph