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242 lines
7.1 KiB
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[#]: subject: "How to Setup Dynamic NFS Provisioning in Kubernetes Cluster"
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[#]: via: "https://www.linuxtechi.com/dynamic-nfs-provisioning-kubernetes/"
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[#]: author: "Pradeep Kumar https://www.linuxtechi.com/author/pradeep/"
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[#]: collector: "lkxed"
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[#]: translator: "geekpi"
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[#]: reviewer: "wxy"
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[#]: publisher: "wxy"
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[#]: url: "https://linux.cn/article-16043-1.html"
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如何在 Kubernetes 集群中设置动态 NFS 配置
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======
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![][0]
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> 在这篇文章中,我们将向你展示如何在 Kubernetes(k8s)集群中设置动态 NFS 配置。
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Kubernetes 中的动态 NFS 存储配置允许你按需自动为 Kubernetes 应用配置和管理 NFS(网络文件系统)卷。它允许创建持久卷(PV)和持久卷声明(PVC),而无需手动干预或预配置存储。
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NFS 配置程序负责动态创建 PV 并将其绑定到 PVC。它与 NFS 服务器交互,为每个 PVC 创建目录或卷。
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### 先决条件
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- 预装 Kubernetes 集群
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- 具有 Kubernetes 集群管理员权限的普通用户
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- 互联网连接
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事不宜迟,让我们深入探讨步骤:
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### 步骤 1、准备 NFS 服务器
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就我而言,我将在 Kubernetes 主节点(Ubuntu 22.04)上安装 NFS 服务器。登录主节点并运行以下命令:
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```
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$ sudo apt update
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$ sudo apt install nfs-kernel-server -y
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```
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创建以下文件夹并使用 NFS 共享它:
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```
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$ sudo mkdir /opt/dynamic-storage
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$ sudo chown -R nobody:nogroup /opt/dynamic-storage
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$ sudo chmod 777 /opt/dynamic-storage
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```
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在 `/etc/exports` 文件中添加以下条目:
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```
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$ sudo vi /etc/exports
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/opt/dynamic-storage 192.168.1.0/24(rw,sync,no_subtree_check)
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```
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保存并关闭文件。
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注意:不要忘记更改导出文件中适合你的部署的网络。
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要使上述更改生效,请运行:
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```
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$ sudo exportfs -a
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$ sudo systemctl restart nfs-kernel-server
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$ sudo systemctl status nfs-kernel-server
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```
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![NFS-Service-Status-Kubernetes-Master-Ubuntu][1]
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在工作节点上,使用以下 `apt` 命令安装 `nfs-common` 包。
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```
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$ sudo apt install nfs-common -y
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```
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### 步骤 2、安装和配置 NFS 客户端配置程序
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NFS 子目录外部配置程序在 Kubernetes 集群中部署 NFS 客户端配置程序。配置程序负责动态创建和管理由 NFS 存储支持的持久卷(PV)和持久卷声明(PVC)。
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因此,要安装 NFS 子目录外部配置程序,首先使用以下命令集安装 `helm`:
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```
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$ curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
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$ chmod 700 get_helm.sh
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$ ./get_helm.sh
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```
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运行以下命令来启用 `helm` 仓库:
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```
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$ helm repo add nfs-subdir-external-provisioner https://kubernetes-sigs.github.io/nfs-subdir-external-provisioner
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```
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使用以下 `helm` 命令部署配置程序:
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```
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$ helm install -n nfs-provisioning --create-namespace nfs-subdir-external-provisioner nfs-subdir-external-provisioner/nfs-subdir-external-provisioner --set nfs.server=192.168.1.139 --set nfs.path=/opt/dynamic-storage
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```
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![helm-install-nfs-provisioning-kubernetes-cluster][2]
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上面的 `helm` 命令将自动创建 `nfs-provisioning` 命名空间,并安装 NFS 配置程序的容器荚/部署、名称为 `nfs-client` 的存储类,并将创建所需的 rbac。
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```
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$ kubectl get all -n nfs-provisioning
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$ kubectl get sc -n nfs-provisioning
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```
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![kubectl-get-all-nfs-provisioning-kubernetes-cluster][3]
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完美,上面的输出确认了配置程序容器荚和存储类已成功创建。
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### 步骤 3、创建持久卷声明(PVC)
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让我们创建 PVC 来为你的容器荚或部署请求存储。PVC 将从存储类 `nfs-client` 请求特定数量的存储:
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```
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$ vi demo-pvc.yml
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kind: PersistentVolumeClaim
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apiVersion: v1
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metadata:
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name: demo-claim
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namespace: nfs-provisioning
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spec:
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storageClassName: nfs-client
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accessModes:
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- ReadWriteMany
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resources:
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requests:
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storage: 10Mi
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```
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保存并关闭文件。
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![PVC-Yaml-Dynamic-NFS-Kubernetes][4]
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运行以下 `kubectl` 命令以使用上面创建的 YML 文件创建 PVC:
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```
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$ kubectl create -f demo-pvc.yml
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```
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验证 PVC 和 PV 是否创建:
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```
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$ kubectl get pv,pvc -n nfs-provisioning
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```
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![Verify-pv-pvc-dynamic-nfs-kubernetes-cluster][5]
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太好了,上面的输出表明 PV 和 PVC 创建成功。
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### 步骤 4、测试并验证动态 NFS 配置
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为了测试和验证动态 NFS 配置,请使用以下 YML 文件启动测试容器荚:
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```
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$ vi test-pod.yml
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kind: Pod
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apiVersion: v1
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metadata:
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name: test-pod
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namespace: nfs-provisioning
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spec:
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containers:
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- name: test-pod
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image: busybox:latest
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command:
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- "/bin/sh"
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args:
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- "-c"
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- "touch /mnt/SUCCESS && sleep 600"
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volumeMounts:
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- name: nfs-pvc
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mountPath: "/mnt"
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restartPolicy: "Never"
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volumes:
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- name: nfs-pvc
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persistentVolumeClaim:
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claimName: demo-claim
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```
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![Pod-Yml-Dynamic-NFS-kubernetes][6]
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使用以下 `kubectl` 命令部署容器荚:
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```
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$ kubectl create -f test-pod.yml
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```
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验证 `test-pod` 的状态:
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```
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$ kubectl get pods -n nfs-provisioning
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```
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![Verify-Test-Pod-Using-NFS-Volume-Kubernetes][7]
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登录到容器荚并验证 NFS 卷是否已安装。
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```
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$ kubectl exec -it test-pod -n nfs-provisioning /bin/sh
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```
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![Access-Dynamic-NFS-Inside-Pod-Kubernetes][8]
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太棒了,上面容器荚的输出确认了动态 NFS 卷已安装且可访问。
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最后删除容器荚和 PVC,查看 PV 是否自动删除。
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```
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$ kubectl delete -f test-pod.yml
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$ kubectl delete -f demo-pvc.yml
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$ kubectl get pv,pvc -n nfs-provisioning
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```
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![Delete-Pod-PVC-Dynamic-NFS][9]
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这就是这篇文章的全部内容,希望对你有所帮助。请随时在下面的评论部分发表你的疑问和反馈。
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*(题图:MJ/75dae36f-ff68-4c63-81e8-281e2c239356)*
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--------------------------------------------------------------------------------
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via: https://www.linuxtechi.com/dynamic-nfs-provisioning-kubernetes/
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作者:[Pradeep Kumar][a]
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选题:[lkxed][b]
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译者:[geekpi](https://github.com/geekpi)
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校对:[wxy](https://github.com/wxy)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.linuxtechi.com/author/pradeep/
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[b]: https://github.com/lkxed/
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[1]: https://www.linuxtechi.com/wp-content/uploads/2023/06/NFS-Service-Status-Kubernetes-Master-Ubuntu.png
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[2]: https://www.linuxtechi.com/wp-content/uploads/2023/06/helm-install-nfs-provisioning-kubernetes-cluster.png
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[3]: https://www.linuxtechi.com/wp-content/uploads/2023/06/kubectl-get-all-nfs-provisioning-kubernetes-cluster.png
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[4]: https://www.linuxtechi.com/wp-content/uploads/2023/06/PVC-Yaml-Dynamic-NFS-Kubernetes.png
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[5]: https://www.linuxtechi.com/wp-content/uploads/2023/06/Verify-pv-pvc-dynamic-nfs-kubernetes-cluster.png
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[6]: https://www.linuxtechi.com/wp-content/uploads/2023/06/Pod-Yml-Dynamic-NFS-kubernetes.png
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[7]: https://www.linuxtechi.com/wp-content/uploads/2023/06/Verify-Test-Pod-Using-NFS-Volume-Kubernetes.png
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[8]: https://www.linuxtechi.com/wp-content/uploads/2023/06/Access-Dynamic-NFS-Inside-Pod-Kubernetes.png
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[9]: https://www.linuxtechi.com/wp-content/uploads/2023/06/Delete-Pod-PVC-Dynamic-NFS.png
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[0]: https://img.linux.net.cn/data/attachment/album/202307/28/222834togtruhoeuh3gtr1.jpg |