Configuring a VolumeSnapshotClass

Creating a VolumeSnapshotClass

VolumeSnapshotClass provides a way to describe the “classes” of storage when provisioning a VolumeSnapshot. Each VolumeSnapshotClass contains the driver, deletionPolicy, and parameters fields, which are used when a VolumeSnapshot belonging to the class needs to be dynamically provisioned.

The name of a VolumeSnapshotClass object is significant, and is how users can request a particular class. Administrators set the name and other parameters of a class when first creating VolumeSnapshotClass objects, and the objects cannot be updated once they are created.

The following is an example of a VolumeSnapshotClass used by Huawei CSI:

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotClass
metadata:
  name: mysnapclass
driver: csi.huawei.com
deletionPolicy: Delete

You can modify the parameters according to Table 1 .

Table 1 VolumeSnapshotClass parameters

Parameter	Description	Remarks
metadata.name	User-defined name of a VolumeSnapshotClass object.	Take Kubernetes v1.22.1 as an example. The value can contain digits, lowercase letters, hyphens (-), and periods (.), and must start and end with a letter or digit.
driver	driver identifier. This parameter is mandatory.	Set this parameter to the driver name set during Huawei CSI installation. The default driver name is csi.huawei.com.
deletionPolicy	Snapshot deletion policy. This parameter is mandatory. The value can be: Delete Retain	If the deletion policy is Delete, the snapshot on the storage device will be deleted together with the VolumeSnapshotContent object. If the deletion policy is Retain, the snapshot and VolumeSnapshotContent object on the storage device will be retained.
parameters.enableHyperMetroSnap	Whether to create SAN HyperMetro snapshots on both ends. "true": Create snapshots on the two storage systems that form the HyperMetro pair. "false": Create a snapshot on the storage system associated with the current storage class.	The default value is "false". When the backend type is oceanstor-san and the storage version is V700R001C10 or later, this parameter can be set to "true".

Procedure

Run the following command to create a VolumeSnapshotClass using the created VolumeSnapshotClass configuration file.
```
kubectl create -f mysnapclass.yaml
```

Run the following command to view the information about the created VolumeSnapshotClass.

kubectl get volumesnapshotclass

The following is an example of the command output.

NAME          DRIVER           DELETIONPOLICY   AGE
mysnapclass   csi.huawei.com   Delete           25s