K8S增加Worker Node - 主机评测

技术教程

新增加Worker Node
1.拷贝已部署好的Node相关文件到新节点
在master节点将Worker Node涉及文件拷贝到新节点192.168.31.72/73

scp /opt/kubernetes root@192.168.31.72:/opt/
scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.31.72:/usr/lib/systemd/system
scp -r /opt/cni/ root@192.168.31.72:/opt/
scp /opt/kubernetes/ssl/ca.pem root@192.168.31.72:/opt/kubernetes/ssl

2.删除kubelet证书和kubeconfig文件

rm /opt/kubernetes/cfg/kubelet.kubeconfig 
rm -f /opt/kubernetes/ssl/kubelet*

注：这几个文件是证书申请审批后自动生成的，每个Node不同，必须删除重新生成。

3.修改主机名

vi /opt/kubernetes/cfg/kubelet.conf
--hostname-override=k8s-node1
vi /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: k8s-node1

4.启动并设置开机启动

systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet
systemctl start kube-proxy
systemctl enable kube-proxy

5.在Master上批准新Node kubelet证书申请

kubectl get csr
NAME                                                   AGE   SIGNERNAME                                    REQUESTOR           CONDITION
node-csr-4zTjsaVSrhuyhIGqsefxzVoZDCNKei-aE2jyTP81Uro   89s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
kubectl certificate approve node-csr-4zTjsaVSrhuyhIGqsefxzVoZDCNKei-aE2jyTP81Uro

6.查看Node状态

kubectl get node
NAME         STATUS     ROLES    AGE   VERSION
k8s-master   Ready      <none>   65m   v1.18.3
k8s-node1    Ready      <none>   12m   v1.18.3
k8s-node2    Ready      <none>   81s   v1.18.3