kubernetes（十）二進制安裝-追加worker節點-有解無憂

追加節點（在master上執行）

追加節點

資源有限，我們這邊嘗試把master節點追加到集群中，如果是新機器，需要執行本檔案的安裝前準備，把ca相關的證書分發到這個機器上，部署 flannel 網路步驟

安裝前準備
把ca相關的證書分發到這個機器上
部署 flannel 網路
安裝docker服務

安裝kubelet服務
參照之前追加worker節點的操作worker節點安裝，如果直接使用之前的kubelet-bootstrap.yml，發現節點無法加入，因為kubelet-bootstrap.yml中的token值有效期只有一天，如果token已經過期，在kube-apiserver中會出現錯誤

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

此時需要按照slave節點上安裝kubelet的步驟，重新生成kubelet-bootstrap.yml

將csr approve后，查看節點情況

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

安裝kubeproxy服務

重新驗證集群

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 {
        width: 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=https://www.cnblogs.com/gaofeng-henu/p/"http://nginx.org/">nginx.org.

Commercial support is available at
nginx.com.

Thank you for using nginx.



root@master:/opt/k8s/yml# curl http://192.168.0.114:8080



Welcome to nginx!
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>

<body>
Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.

For online documentation and support please refer to
nginx.org.

Commercial support is available at
nginx.com.

Thank you for using nginx.

可以看到訪問集群中任意一個節點的8080埠，都可以正確訪問到后端對應的nginx服務

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