kubernetes（十）二進制安裝-追加worker節點

時間 2020-03-30

標籤 kubernetes 二進制安裝追加 worker 節點简体版

原文原文鏈接

追加節點（在master上執行）

追加節點

資源有限，咱們這邊嘗試把master節點追加到集羣中，若是是新機器，須要執行本文檔的安裝前準備，把ca相關的證書分發到這個機器上，部署 flannel 網絡步驟html

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

安裝kubelet服務
參照以前追加worker節點的操做worker節點安裝，若是直接使用以前的kubelet-bootstrap.yml，發現節點沒法加入，由於kubelet-bootstrap.yml中的token值有效期只有一天，若是token已通過期，在kube-apiserver中會出現錯誤bootstrap

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後端

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

此時須要按照slave節點上安裝kubelet的步驟，從新生成kubelet-bootstrap.ymlapi

將csr approve後，查看節點狀況網絡

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app

從新驗證集羣

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="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 {
        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="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>

能夠看到訪問集羣中任意一個節點的8080端口，均可以正確訪問到後端對應的nginx服務

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