[{"id":"IL-0183","title":{"en":"kubeadm's one-year leaf certificates expired, so kube-apiserver could not reach etcd, restarted in a loop and left the cluster unreachable","ko":"kubeadm 으로 만든 클러스터의 1년짜리 인증서가 만료되어 kube-apiserver 가 etcd 와 TLS 연결을 맺지 못하고 재시작을 반복했고, 클러스터에 접속할 수 없게 됐다."},"org":"ckck803","org_slug":"ckck803","date":"2026-02-22","severity":"unknown","root_cause":"certificate-expiry","url":"https://benchlet.com/incidentlib/app/cases/IL-0183","shared_components":["kubelet","kube-apiserver"]},{"id":"IL-0113","title":{"en":"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 effect","ko":"한 번도 교체되지 않은 GKE API 서버 인증서 때문에 메인 클러스터의 컨트롤 플레인이 망가져 EU 리전의 백엔드 API, 프런트엔드, 터널이 모두 멈췄다"},"org":"Webhook Relay","org_slug":"webhook-relay","date":"2022-05-10","severity":"unknown","root_cause":"certificate-expiry","url":"https://benchlet.com/incidentlib/app/cases/IL-0113","shared_components":["kube-apiserver"]}]