master 节点

export oldip1=192.168.10.138

export newip1=192.168.10.148

node 节点

export oldip2=192.168.10.139

export newip2=192.168.10.149

export oldip3=192.168.10.140

export newip3=192.168.10.150

find /etc/kubernetes -type f | xargs sed -i "s/ $oldip1/$ newip1/"

find /etc/kubernetes -type f | xargs sed -i "s/ $oldip2/$ newip2/"

find /etc/kubernetes -type f | xargs sed -i "s/ $oldip3/$ newip3/"

find /root/.kube/config -type f | xargs sed -i "s/ $oldip1/$ newip1/"

echo "success 1111 full"

cd /root/.kube/cache/discovery

mv ${oldip1}_6443 ${newip1}_6443

echo "success 2222 full"

cd /etc/kubernetes/pki

mv apiserver.key apiserver.key.bak

mv apiserver.crt apiserver.crt.bak

kubeadm init phase certs apiserver --apiserver-advertise-address $newip1

systemctl restart kubelet

2)修改configmap

kubectl -n kube-system edit cm kube-proxy

老IP修改成新master IP地址

node 节点

记得修改每个node节点上 kubelet 配置文件IP

vi /etc/kubernetes/kubelet.conf

改成newip地址

systemctl restart kubelet

最后k8s集群所在的服务器重启2-3次，验证所有pod状态都正常。