追加节点（在master上执行）
追加节点
资源有限，我们这边尝试把master节点追加到集群中，如果是新机器，需要执行本文档的 安装前准备，把ca相关的证书分发到这个机器上，部署 flannel 网络步骤
-
把ca相关的证书分发到这个机器上
-
安装kubelet服务
参照之前追加worker节点的操作worker节点安装，如果直接使用之前的kubelet-bootstrap.yml，发现节点无法加入，因为kubelet-bootstrap.yml中的token值有效期只有一天，如果token已经过期，在kube-apiserver中会出现错误2月 12 11:01:01 master kube-apiserver[5018]: E0212 11:01:01.640497 5018 authentication.go:104] Unable to authenticate the request due to an error: invalid bearer token查看token
root@master:/opt/k8s/work# kubeadm token list --kubeconfig ~/.kube/config TOKEN TTL EXPIRES USAGES DESCRIPTION EXTRA GROUPS 5t989l.rweut7kedj7ifl1a <invalid> 2020-02-11T18:19:41+08:00 authentication,signing kubelet-bootstrap-token system:bootstrappers:slave此时需要按照slave节点上安装kubelet的步骤，重新生成kubelet-bootstrap.yml
将csr approve后，查看节点情况
root@master:/opt/k8s/work# kubectl get nodes NAME STATUS ROLES AGE VERSION master Ready <none> 21s v1.17.2 slave Ready <none> 36h v1.17.2 -
安装kubeproxy服务
重新验证集群
root@master:/opt/k8s/yml# kubectl create -f nginx.yml
service/nginx created
deployment.apps/nginx-deployment created
root@master:/opt/k8s/yml# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-deployment-56f8998dbc-6b6qm 1/1 Running 0 87s 172.30.22.2 master <none> <none>
root@master:/opt/k8s/yml# kubectl create -f busybox.yml
pod/busybox created
root@master:/opt/k8s/yml# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
busybox 1/1 Running 0 102s 172.30.22.3 master <none> <none>
nginx-deployment-56f8998dbc-6b6qm 1/1 Running 0 3m20s 172.30.22.2 master <none> <none>
root@master:/opt/k8s/yml# curl http://192.168.0.107:8080
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
root@master:/opt/k8s/yml# curl http://192.168.0.114:8080
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
可以看到访问集群中任意一个节点的8080端口，都可以正确访问到后端对应的nginx服务