11.3.5. Enabling volume snapshot boot sources
You can enable volume snapshot boot sources by setting the parameter in the StorageProfile associated with the storage class that stores operating system base images.
Although DataImportCron was originally designed to maintain only PVC sources, VolumeSnapshot sources scale better than PVC sources for certain storage types.
Use volume snapshots on a storage profile that is proven to scale better when cloning from a single snapshot.
Prerequisites
- You must have access to a volume snapshot with the operating system image.
- The storage must support snapshotting.
-
You have installed the OpenShift CLI (
oc).
Procedure
Open the storage profile object that corresponds to the storage class used to provision boot sources by running the following command:
$ oc edit storageprofile <storage_class>-
Review the
dataImportCronSourceFormatspecification of theStorageProfileto confirm whether or not the VM is using PVC or volume snapshot by default. Edit the storage profile, if needed, by updating the
dataImportCronSourceFormatspecification tosnapshot.Example storage profile:
apiVersion: cdi.kubevirt.io/v1beta1 kind: StorageProfile metadata: # ... spec: dataImportCronSourceFormat: snapshot
Verification
Open the storage profile object that corresponds to the storage class used to provision boot sources.
$ oc get storageprofile <storage_class> -oyaml-
Confirm that the
dataImportCronSourceFormatspecification of theStorageProfileis set to 'snapshot', and that anyDataSourceobjects that theDataImportCronpoints to now reference volume snapshots.
You can now use these boot sources to create virtual machines.
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