Configuring a VolumeSnapshot

VolumeSnapshot can be provisioned in two ways: pre-provisioning and dynamic provisioning. Currently, Huawei CSI supports only dynamic provisioning. This section describes how to dynamically provision a VolumeSnapshot using Huawei CSI.

The following is an example of the VolumeSnapshot configuration file:

If api-versions in your environment supports v1, use the following example:

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
  name: mysnapshot
spec:
  volumeSnapshotClassName: mysnapclass
  source:
    persistentVolumeClaimName: mypvc

If api-versions in your environment supports v1beta1, use the following example:

apiVersion: snapshot.storage.k8s.io/v1beta1
kind: VolumeSnapshot
metadata:
  name: mysnapshot
spec:
  volumeSnapshotClassName: mysnapclass
  source:
    persistentVolumeClaimName: mypvc

The api-versions information in the VolumeSnapshot must be the same as the version used for creating the VolumeSnapshotClass.

You can modify the parameters according to Table 1.

Table 1 VolumeSnapshot parameters

Parameter	Description	Remarks
metadata.name	User-defined name of a VolumeSnapshot 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.
spec.volumeSnapshotClassName	Name of the VolumeSnapshotClass object.	--
spec.source.persistentVolumeClaimName	Name of the source PVC object.	Name of the source PVC of the snapshot

Prerequisites

The source PVC exists, and the backend where the PVC resides supports VolumeSnapshot creation. For details about the storage devices that support VolumeSnapshot creation, see Table 2 and Table 2. For details about the Kubernetes versions that support VolumeSnapshot creation, see Table 1.
The volume snapshot component CRD on which the running of Huawei CSI depends has been installed. For details, see Checking Volume Snapshot-Dependent Components.
A VolumeSnapshotClass that uses Huawei CSI exists in the system.

Procedure

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

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

kubectl get volumesnapshot

The following is an example of the command output.

NAME         READYTOUSE   SOURCEPVC   SOURCESNAPSHOTCONTENT   RESTORESIZE   SNAPSHOTCLASS   SNAPSHOTCONTENT                                    CREATIONTIME   AGE
mysnapshot   true         mypvc                               100Gi         mysnapclass     snapcontent-1009af0a-24c2-4435-861c-516224503f2d   <invalid>      78s