我的证书已过期：
root@ubuntu:~# kubectl get pods
Unable to connect to the server: x509: certificate has expired or is not yet valid
我通过运行进行了验证
root@ubuntu:~# kubeadm alpha certs check-expiration
[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 -oyaml'
[check-expiration] Error reading configuration from the Cluster. Falling back to default configuration
W0330 09:18:49.875780 12562 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubepro xy.config.k8s.io]
CERTIFICATE EXPIRES RESIDUAL TIME CERTIFICATE AUTHORITY EXTERNALLY MANAGED
admin.conf Mar 29, 2021 09:27 UTC <invalid> no
apiserver Mar 29, 2021 09:27 UTC <invalid> ca no
apiserver-etcd-client Mar 29, 2021 09:27 UTC <invalid> etcd-ca no
apiserver-kubelet-client Mar 29, 2021 09:27 UTC <invalid> ca no
controller-manager.conf Mar 29, 2021 09:27 UTC <invalid> no
etcd-healthcheck-client Mar 29, 2021 09:27 UTC <invalid> etcd-ca no
etcd-peer Mar 29, 2021 09:27 UTC <invalid> etcd-ca no
etcd-server Mar 29, 2021 09:27 UTC <invalid> etcd-ca no
front-proxy-client Mar 29, 2021 09:27 UTC <invalid> front-proxy-ca no
scheduler.conf Mar 29, 2021 09:27 UTC <invalid> no
CERTIFICATE AUTHORITY EXPIRES RESIDUAL TIME EXTERNALLY MANAGED
ca Mar 27, 2030 09:27 UTC 8y no
etcd-ca Mar 27, 2030 09:27 UTC 8y no
front-proxy-ca Mar 27, 2030 09:27 UTC 8y no
我通过运行：kubeadm alpha certs renew all续订证书。
W0330 09:20:21.951839 13124 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
certificate embedded in the kubeconfig file for the admin to use and for kubeadm itself renewed
certificate for serving the Kubernetes API renewed
certificate the apiserver uses to access etcd renewed
certificate for the API server to connect to kubelet renewed
certificate embedded in the kubeconfig file for the controller manager to use renewed
certificate for liveness probes to healthcheck etcd renewed
certificate for etcd nodes to communicate with each other renewed
certificate for serving etcd renewed
certificate for the front proxy client renewed
certificate embedded in the kubeconfig file for the scheduler manager to use renewed
所有证书现在都更新到2022年，所以应该没问题：
CERTIFICATE EXPIRES RESIDUAL TIME CERTIFICATE AUTHORITY EXTERNALLY MANAGED
admin.conf Mar 30, 2022 09:20 UTC 364d no
apiserver Mar 30, 2022 09:20 UTC 364d ca no
apiserver-etcd-client Mar 30, 2022 09:20 UTC 364d etcd-ca no
apiserver-kubelet-client Mar 30, 2022 09:20 UTC 364d ca no
controller-manager.conf Mar 30, 2022 09:20 UTC 364d no
etcd-healthcheck-client Mar 30, 2022 09:20 UTC 364d etcd-ca no
etcd-peer Mar 30, 2022 09:20 UTC 364d etcd-ca no
etcd-server Mar 30, 2022 09:20 UTC 364d etcd-ca no
front-proxy-client Mar 30, 2022 09:20 UTC 364d front-proxy-ca no
scheduler.conf Mar 30, 2022 09:20 UTC 364d no
CERTIFICATE AUTHORITY EXPIRES RESIDUAL TIME EXTERNALLY MANAGED
ca Mar 27, 2030 09:27 UTC 8y no
etcd-ca Mar 27, 2030 09:27 UTC 8y no
front-proxy-ca Mar 27, 2030 09:27 UTC 8y no
但当我运行kubectl get pods时，我收到了错误：
error: You must be logged in to the server (Unauthorized)
我认为这应该是证书的问题，但我不确定如何解决。我应该创建新证书并替换配置文件中的证书吗？
~/.kube/config没有随更改而更新。
我跑了：
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
它修复了它。