轉載CentOS7環境安裝kubectl工具
CentOS7環境安裝Kubernetes四部曲之四:安裝kubectl工具
轉自--https://blog.csdn.net/boling_cavalry/article/details/79624655
2018年03月20日 16:40:57
閱讀數:2117
本文是《CentOS7環境安裝Kubernetes四部曲》系列的終篇,經歷了前三篇文章的實戰,我們用rancher搭建了具備master和node的完整K8S環境,但是目前還不能通過kubectl工具在K8S環境做更多的操作,本章我們來實戰安裝和配置kubectl工具;
原文地址:http://blog.csdn.net/boling_cavalry/article/details/79624655
前三篇文章連結
- 《CentOS7環境安裝Kubernetes四部曲之一:標準化機器準備》;
- 《CentOS7環境安裝Kubernetes四部曲之二:配置模板和安裝master》;
- 《CentOS7環境安裝Kubernetes四部曲之三:新增節點》;
kubectl工具安裝在哪裡?
kubectl是個客戶端工具,可以安裝在任意一臺Linux、windows或者Mac電腦上,只要這個電腦能夠連線master節點,本次實戰我們將kubectl安裝在一臺全新的CentOS7機器上;
下載kubectl工具
有三種下載方式,您可以選擇其中任意一種:
1. 在linux機器上執行以下命令下載:
<span style="color:#000000"><code class="language-shell">curl -LO https://storage<span style="color:#009900">.googleapis</span><span style="color:#009900">.com</span>/kubernetes-release/release/$(curl -s https://storage<span style="color:#009900">.googleapis</span><span style="color:#009900">.com</span>/kubernetes-release/release/stable<span style="color:#009900">.txt</span>)/bin/linux/amd64/kubectl</code></span>
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2.在我的GitHub下載,地址是:https://github.com/zq2599/blog_demos/blob/master/k8s_tools/kubectl/linux/kubectl.zip,在這個頁面點選”download”按鈕即可下載,下載後記得解壓;
3. 在csdn下載,地址:https://download.csdn.net/download/boling_cavalry/10297309
設定工具
- kubectl檔案下載到linux機器後,執行命令chmod +x ./kubectl,給檔案可執行許可權;
- 執行以下命令,將kubectl移動到可以全域性訪問的目錄下:
<span style="color:#000000"><code class="language-shell">mv ./kubectl /usr/<span style="color:#000088">local</span>/bin/kubectl</code></span>
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3. 在linux機器的任意目錄都能執行kubectl,直接輸入kubectl然後回車,可以看到如下資訊:
<span style="color:#000000"><code class="language-shell">kubectl controls the Kubernetes cluster manager.
Find more information <span style="color:#000088">at</span> <span style="color:#000088">https</span>://github.com/kubernetes/kubernetes.
Basic Commands (Beginner):
<span style="color:#4f4f4f">create</span> Create a resource <span style="color:#4f4f4f">from</span> a <span style="color:#4f4f4f">file</span> or <span style="color:#4f4f4f">from</span> <span style="color:#000088">stdin</span>.
expose Take a replication controller, service, deployment or pod and expose <span style="color:#000088">it</span> <span style="color:#000088">as</span> a <span style="color:#4f4f4f">new</span> Kubernetes Service
run Run a particular image <span style="color:#000088">on</span> <span style="color:#009900">the</span> <span style="color:#009900">cluster</span>
<span style="color:#4f4f4f">set</span> Set specific features <span style="color:#000088">on</span> <span style="color:#009900">objects</span>
run-container Run a particular image <span style="color:#000088">on</span> <span style="color:#009900">the</span> <span style="color:#009900">cluster</span>. <span style="color:#009900">This</span> <span style="color:#009900">command</span> <span style="color:#009900">is</span> <span style="color:#009900">deprecated</span>, <span style="color:#009900">use</span> <span style="color:#009900">"run"</span> <span style="color:#009900">instead</span>
Basic Commands (Intermediate):
<span style="color:#4f4f4f">get</span> Display <span style="color:#009900">one</span> or many resources
explain Documentation of resources
edit Edit a resource <span style="color:#000088">on</span> <span style="color:#009900">the</span> <span style="color:#009900">server</span>
<span style="color:#4f4f4f">delete</span> Delete resources <span style="color:#000088">by</span> filenames, <span style="color:#000088">stdin</span>, resources and names, or <span style="color:#000088">by</span> resources and label selector</code></span>
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工具已經準備好,接下來我們把配置做好,使得kubectl可以連線到K8S上執行命令;
配置引數
- 在rancher的管理頁面上,點選下圖紅框1中的”CLI”,在出現的頁面中點選紅框2中的”生成配置“:
- 如下圖,點選紅框中的”複製到剪下板“,將按鈕上方的配置資訊複製下來:
- 在linux機器上,在家目錄建立.kube資料夾,命令如下:
<span style="color:#000000"><code class="language-shell"><span style="color:#000088">mkdir</span> ~<span style="color:#008800">/.kube</span></code></span>
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4. 在.kube資料夾下新建一個名為config的檔案,把剛才複製的配置資訊貼上進來;
至此,kubectl工具的安裝配置就完成了,輸入命令get service -a -o wide –all-namespaces試試,可以看到當前的服務列表:
<span style="color:#000000"><code class="language-shell">[[email protected] ~]# kubectl get service -a -o wide --all-namespaces
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
default kubernetes ClusterIP 10.43.0.1 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 443/TCP 20h <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span>
default tomcat001 NodePort 10.43.243.24 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 8080:30018/TCP 4h name=tomcat001
kube-system heapster ClusterIP 10.43.157.242 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 80/TCP 20h k8s-app=heapster
kube-system kube-dns ClusterIP 10.43.0.10 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 53/UDP,53/TCP 20h k8s-app=kube-dns
kube-system kubernetes-dashboard ClusterIP 10.43.199.86 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 80/TCP 20h k8s-app=kubernetes-dashboard
kube-system monitoring-grafana ClusterIP 10.43.112.198 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 80/TCP 20h k8s-app=grafana
kube-system monitoring-influxdb ClusterIP 10.43.200.65 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 8086/TCP 20h k8s-app=influxdb
kube-system tiller-deploy ClusterIP 10.43.28.153 <span style="color:#006666"><<span style="color:#4f4f4f">none</span>></span> 44134/TCP 20h app=helm,name=tiller</code></span>
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至此,《CentOS7環境安裝Kubernetes四部曲》就全部結束了,希望能夠幫助您快速搭建環境,然後一起開始愉快的K8S之旅;