k8s修改集群IP--不重置集群

正常在用集群想要更换ip

master 节点ip192.168.10.138 改为192.168.10.148

node1节点ip192.168.10.139 改为192.168.10.149

node2节点ip192.168.10.140 改为192.168.10.150

master 节点

1)执行脚本1233.sh

1233.sh 内容如下：

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。