学习来源：51cto: /sd/518e5
腾讯课堂: /course/2738602
K8s集群环境搭建：/qq_26900081/article/details/109291999
学习过程中一不小心把K8s给折腾坏了，重新初始化一下群里，一顿操作猛如虎，万幸恢复如初了。
master1上的命令kubectl都执行不了，众node上docker ps发现都容器全部不在了。
vi /var/log/messages 错误信息: K8s node "localhost.master1.131" not found
1、所有节点（master和node）重置：kubeadm reset
2、我修改了配置文件（所有master节点），所以重新配置一下：kubeadm config images pull --config ./kubeadm-config.yaml
3、初始化(master1主节点)：kubeadm init --config kubeadm-config.yaml --upload-certs
4、将master2、master3和所有node节点加入集群：参考/qq_26900081/article/details/109331192
5、执行以下命令解决错误，需要重新配置这个目录.kube和文件：
错误信息：Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")
[root@localhost ~]# rm -rf $HOME/.kube[root@localhost ~]# mkdir -p $HOME/.kube[root@localhost ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config[root@localhost ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
6、重新安装Calico：参考/qq_26900081/article/details/109331192第四节
7、按需重新安装Metrics和Dashboard、kuboard：参考/qq_26900081/article/details/109337475
