Container Service for Kubernetes:Mount a statically provisioned NAS volume

Precautions

Procedure

You can mount a NAS file system by using a PV and a PVC.

1. Create a PV.

   You can create a PV in the ACK console or by using a YAML file.

   • Create a PV by using a YAML file.

     Use the following nas-pv.yaml file to create a PV:

     apiVersion: v1
     kind: PersistentVolume
     metadata:
       name: pv-nas
     spec:
       capacity:
         storage: 5Gi
       storageClassName: nas
       accessModes:
         - ReadWriteMany
       flexVolume:
         driver: "alicloud/nas"
         options:
           server: "0cd8b4a576-u****.cn-hangzhou.nas.aliyuncs.com"
           path: "/k8s"
           vers: "3"
           options: "nolock,tcp,noresvport"

   • Create a PV in the ACK console.

     1. Log on to the ACK console.

     2. In the left-side navigation pane of the ACK console, click Clusters.

     3. On the Clusters page, find the cluster that you want to manage. Then, click the name of the cluster or click Details in the Actions column.

     4. In the left-side navigation pane of the cluster details page, choose Volumes > Persistent Volumes.

     5. On the Volumes page, click Create in the upper-right corner of the page.

     6. In the Create PV dialog box, set the parameters.

        Parameter	Description
        PV Type	In this example, NAS is selected.
        Volume Name	The name of the PV that you want to create. The name must be unique in the cluster. In this example, pv-nas is used.
        Volume Plug-in	In this example, Flexvolume is selected.
        Capacity	The capacity of the PV that you want to create. The capacity of the PV cannot exceed that of the NAS file system to be mounted.
        Access Mode	Default value: ReadWriteMany.
        Mount Target Domain Name	The domain name of the mount target that is used to mount the NAS file system to the cluster. For more information about how to manage the mount targets of a NAS file system, see Manage mount targets.
        Subdirectory	Enter a subdirectory in the NAS file system. The subdirectory must start with a forward slash (/). If this parameter is set, the PV will be mounted to the specified subdirectory. If the specified subdirectory does not exist, the system automatically creates the subdirectory in the NAS file system and mounts the subdirectory to the cluster. If you do not set this parameter, the root directory of the NAS file system is mounted. If you specify a subdirectory of an Extreme NAS file system, the subdirectory must start with /share.
        Permissions	The access permissions on the mounted directory. For example, you can set this parameter to 755, 644, or 777. Note You can set access permissions only on subdirectories. If the mounted directory stores a large number of files, we recommend that you do not set this parameter. Otherwise, the process of running the chmod command may require an excessive amount of time. If the mounted directory is a subdirectory, this parameter is optional. If you do not set this parameter, the original permissions on the mounted directory are used. Take note of the following items when you set the permissions: For FlexVolume versions earlier than V1.14.6.15-8d3b7e7-aliyun, use the recursive mode when you configure permission settings. The permissions on all files and directories under the mounted directory will be modified. For FlexVolume V1.14.6.15-8d3b7e7-aliyun and later, set the chmod (Change Mode) parameter to configure permission settings.
        chmod (Change Mode)	The change mode of access permissions. Valid values: Non-recursive and Recursive. Non-recursive: The permission changes apply only to the mounted directory. The subdirectories and files in the mounted directory are not affected. Recursive mode: The permission changes apply to the mounted directory, and the subdirectories and files in the mounted directory. Note If you select the recursive mode for a mounted directory that contains a large number of files, the process of running the chmod command may require an excessive amount of time. The mount or unmount operation may fail. Exercise caution when you set this parameter.
        Version	The version of the NFS protocol. We recommend that you use NFSv3. Extreme NAS file systems support only NFSv3.
        Labels	Add labels to the PV.

     7. Click Create.

2. Create a PVC.

   Use the following nas-pvc.yaml file to create a PVC:

   apiVersion: v1
   kind: PersistentVolumeClaim
   metadata:
     name: pvc-nas
   spec:
     accessModes:
       - ReadWriteMany
     storageClassName: nas
     resources:
       requests:
         storage: 5Gi

3. Create a pod.

   Use the following nas-pod.yaml file to create a pod:

   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: nas-static
     labels:
       app: nginx
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: nginx
     template:
       metadata:
         labels:
           app: nginx
       spec:
         containers:
         - name: nginx
           image: nginx
           ports:
           - containerPort: 80
           volumeMounts:
             - name: pvc-nas
               mountPath: /data
         volumes:
           - name: pvc-nas
             persistentVolumeClaim:
               claimName: pvc-nas