重置node节点

删除node节点


删除通过csr请求后产生的所有文件和证书

[root@lab1 ~]# rm -rf /etc/kubernetes/kubelet.conf
[root@lab1 ~]# rm -rf /etc/kubernetes/pki/kubelet*





重启所有节点的kubelet
[root@lab1 ~]# systemctl restart kubelet




获取csr

[root@lab1 ~]# kubectl get csr
NAME                                                   AGE       REQUESTOR           CONDITION
node-csr-W8jDxg0LEZZw6U8V1WudhEBRP0qt4ybPSJ-P8XfDzlo   7s        kubelet-bootstrap   Pending
node-csr-rgnoMPuDdtvfoogsY_zbf1R3KMU_B8M8cBv75AHw8fE   10s       kubelet-bootstrap   Pending
node-csr-vO6qQvzlI974qUHXVpPu6kMP4eBfKMcBECwqY7xWYu4   17s       kubelet-bootstrap   Pending




通过证书请求

[root@lab1 ~]# kubectl certificate approve node-csr-W8jDxg0LEZZw6U8V1WudhEBRP0qt4ybPSJ-P8XfDzlo
[root@lab1 ~]# kubectl certificate approve node-csr-rgnoMPuDdtvfoogsY_zbf1R3KMU_B8M8cBv75AHw8fE
[root@lab1 ~]# kubectl certificate approve node-csr-vO6qQvzlI974qUHXVpPu6kMP4eBfKMcBECwqY7xWYu4






5、设置角色


[root@lab2 ~]# kubectl label nodes lab1 node-role.kubernetes.io/master=
[root@lab2 ~]# 
[root@lab2 ~]# kubectl label nodes lab2 node-role.kubernetes.io/node=
node/lab2 labeled
[root@lab2 ~]# kubectl label nodes lab3 node-role.kubernetes.io/node=
node/lab3 labeled


[root@lab1 ~]# kubectl get nodes
NAME      STATUS    ROLES     AGE       VERSION
lab1      Ready     <none>    15m       v1.11.0
lab2      Ready     <none>    14m       v1.11.0
lab3      Ready     <none>    14m       v1.11.0



6、解决后遗症


执行：

[root@lab1 coredns]# kubectl delete -f coredns.yaml



现象：

[root@lab2 k8s]# kubectl get pods -n kube-system
NAME                       READY     STATUS              RESTARTS   AGE
coredns-6c65fc5cbb-7xvzs   0/1       ContainerCreating   0          2m
coredns-6c65fc5cbb-kh4zg   0/1       ContainerCreating   0          2m



原因：

修改node名称后的遗留症状




查看pod日志，最后部分

[root@lab2 k8s]# kubectl describe po coredns-6c65fc5cbb-7xvzs -n kube-system

"cni0" already has an IP address different from 10.244.5.1/24



解决：

所有节点执行如下：

rm -rf /var/lib/cni/flannel/* && rm -rf /var/lib/cni/networks/cbr0/* && ip link delete cni0
rm -rf /var/lib/cni/networks/cni0/*


参照文档：

https://my.oschina.net/u/3390908/blog/1649764