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                2021-11-19 周5 ## 因子 k8s在2015年google開源之后,發展迅速,好多工具層出不窮。包括cmd工具和web端工具;本文主要關注cmd工具。 * kubectl - k8s command client * helm - k8s yaml package util * k9s - k8s plus client ## kubectl 可以使用 Kubectl 命令行工具管理 Kubernetes 集群,`kubectl`在`$HOME/.kube`目錄中查找一個名為`config`的配置文件。可以通過設置 KUBECONFIG 環境變量或設置[`--kubeconfig`](https://kubernetes.io/zh/docs/concepts/configuration/organize-cluster-access-kubeconfig/)參數來指定其它[kubeconfig](https://kubernetes.io/zh/docs/concepts/configuration/organize-cluster-access-kubeconfig/)文件 詳情請參考:https://kubernetes.io/zh/docs/reference/kubectl/overview/ ### 示例 - 查看版本 ``` bash [root@master ~]# kubectl version Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.1", GitCommit:"5e58841cce77d4bc13713ad2b91fa0d961e69192", GitTreeState:"clean", BuildDate:"2021-05-12T14:18:45Z", GoVersion:"go1.16.4", Compiler:"gc", Platform:"linux/amd64"} Server Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.1", GitCommit:"5e58841cce77d4bc13713ad2b91fa0d961e69192", GitTreeState:"clean", BuildDate:"2021-05-12T14:12:29Z", GoVersion:"go1.16.4", Compiler:"gc", Platform:"linux/amd64"} ``` - 查看集群信息 ``` bash [root@master ~]# kubectl cluster-info Kubernetes control plane is running at https://172.31.1.100:6443 CoreDNS is running at https://172.31.1.100:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'. ``` - 查看集群節點 ``` bash [root@master ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION master Ready control-plane,master 14d v1.21.1 node1 Ready 14d v1.21.1 ``` ``` bash # 聲明式創建資源 kubectl apply -f xxx.yaml # 聲明式刪除資源 kubect delete -f xxx.yaml # 獲取所有命名空間下所有資源 kubect get all --all-namespaces # 獲取命名空間 kubectl get ns # 查看pod日志 kubectl logs -f pod/xxx -n default # 查看容器描述 kubectl describe pod/xxx -n default ``` ## helm 官網網站:https://helm.sh/zh/ **Kubernetes** **包管理器** Helm 是查找、分享和使用軟件構建[Kubernetes](https://kubernetes.io/)的最優方式。 Helm的一般操作: * helm search: ??搜索chart * helm pull: ???下載chart到本地目錄查看 * helm install: ??上傳chart到Kubernetes * helm list: ????列出已發布的chart 詳情請參考: https://helm.sh/zh/docs/helm/helm/ ### 例子 ![](https://img.kancloud.cn/20/72/207203a69372ffa1d9b91b96601fc40b_1922x1190.png) ## k9s k9s是一款k8s客戶端管理工具,在kubectl基礎上加強了命令行交互體驗。 Kubernetes CLI 以時尚的方式管理您的集群! ![](https://img.kancloud.cn/59/c3/59c3a0bdba4ff80de88c1ac8b27c1f3a_1910x1298.png) ## 實際使用 通過 `--kubeconfig` 來指定配置文件。 ``` bash k9s --kubeconfig ~/.kube/k8s.yaml ``` ![](https://img.kancloud.cn/8c/12/8c12e375e372543da2be8d5e85c04523_3358x1910.png)
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