sudo kubeadm certs check-expiration
[sudo] password for haedongg:
[check-expiration] Reading configuration from the cluster...
[check-expiration] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[check-expiration] Error reading configuration from the Cluster. Falling back to default configuration
CERTIFICATE EXPIRES RESIDUAL TIME CERTIFICATE AUTHORITY EXTERNALLY MANAGED
admin.conf Jun 16, 2026 06:22 UTC 323d ca no
apiserver Jun 16, 2026 06:22 UTC 323d ca no
apiserver-etcd-client Jun 16, 2026 06:22 UTC 323d etcd-ca no
apiserver-kubelet-client Jun 16, 2026 06:22 UTC 323d ca no
controller-manager.conf Jun 16, 2026 06:22 UTC 323d ca no
etcd-healthcheck-client Jun 16, 2026 06:22 UTC 323d etcd-ca no
etcd-peer Jun 16, 2026 06:22 UTC 323d etcd-ca no
etcd-server Jun 16, 2026 06:22 UTC 323d etcd-ca no
front-proxy-client Jun 16, 2026 06:22 UTC 323d front-proxy-ca no
scheduler.conf Jun 16, 2026 06:22 UTC 323d ca no
super-admin.conf Jun 16, 2026 06:22 UTC 323d ca no
CERTIFICATE AUTHORITY EXPIRES RESIDUAL TIME EXTERNALLY MANAGED
ca Aug 07, 2033 03:39 UTC 8y no
etcd-ca Aug 07, 2033 03:39 UTC 8y no
front-proxy-ca Aug 07, 2033 03:39 UTC 8y no