934.【kubernetes】kubeadm版本更新证书

一、问题背景

1. kubernetes 的安装方式为：kubeadm安装;
2. 执行 kubectl get po 时遇到的报错如下：

E0205 13:19:46.526842   21513 memcache.go:238] couldn't get current server API group list: Get "https://cloudwave1:6443/api?timeout=32s": x509: certificate has expired or is not yet valid: current time 2024-02-05T13:19:46+08:00 is after 2024-01-20T10:16:49Z
E0205 13:19:46.529545   21513 memcache.go:238] couldn't get current server API group list: Get "https://cloudwave1:6443/api?timeout=32s": x509: certificate has expired or is not yet valid: current time 2024-02-05T13:19:46+08:00 is after 2024-01-20T10:16:49Z
E0205 13:19:46.532281   21513 memcache.go:238] couldn't get current server API group list: Get "https://cloudwave1:6443/api?timeout=32s": x509: certificate has expired or is not yet valid: current time 2024-02-05T13:19:46+08:00 is after 2024-01-20T10:16:49Z
E0205 13:19:46.538640   21513 memcache.go:238] couldn't get current server API group list: Get "https://cloudwave1:6443/api?timeout=32s": x509: certificate has expired or is not yet valid: current time 2024-02-05T13:19:46+08:00 is after 2024-01-20T10:16:49Z
E0205 13:19:46.541266   21513 memcache.go:238] couldn't get current server API group list: Get "https://cloudwave1:6443/api?timeout=32s": x509: certificate has expired or is not yet valid: current time 2024-02-05T13:19:46+08:00 is after 2024-01-20T10:16:49Z
Unable to connect to the server: x509: certificate has expired or is not yet valid: current time 2024-02-05T13:19:46+08:00 is after 2024-01-20T10:16:49Z

显然，证书到期了，没有续；

二、解决办法如下

1. 执行：kubeadm certs renew all，更新证书
   

   

2. 找到并重启 kube-apiserver 服务

## 查找服务
docker ps | grep kube-api
##
docker restart 容器id

3. 找到并重启 kube-controller-manager 服务

## 查找服务
docker ps | grep kube-controller
##
docker restart 容器id

4. 找到并重启 kube-scheduler 服务

## 查找服务
docker ps | grep kube-scheduler
##
docker restart 容器id

5. 找到并重启 etcd 服务

## 查找服务
docker ps | grep etcd
##
docker restart 容器id