Support for zone-redundant storage (ZRS) managed disks

[volver-13]

Describe the problem/challenge you have
Velero is currently unable to backup and restore Azure Zone Redundant Disks introduced at March 02, 2021: Zone Redundant Storage

When it tries to backup ZRS volume the following error is thrown:

time="2022-01-25T16:55:34Z" level=info msg="1 errors encountered backup up item" backup=velero/newbackup5 logSource="pkg/backup/backup.go:412" name=nginx-deployment-ccb85775c-ws7r7
time="2022-01-25T16:55:34Z" level=error msg="Error backing up item" backup=velero/newbackup5 error="error getting volume info: rpc error: code = Unknown desc = disk has a nil SKU" logSource="pkg/backup/backup.go:416" name=nginx-deployment-ccb85775c-ws7r7

Looks like velero-plugin-for-microsoft-azure plugin uses some old Azure SDK version.

ZRS disk types are NOT present on the DiskStorageAccountTypes enum in 2019-07-01 SDK

Newest 2021-11-01 SDK contains ZRS types on the list.

Possibly easy win to add support for ZRS disks?

Describe the solution you'd like
it would be great if velero would be able to snapshot ZRS disks and be able to restore them

Environment:

I tried the lastest:

velero/velero:v1.8.0-rc.1
velero/velero-plugin-for-microsoft-azure:v1.4.0-rc.1

in AKS 1.21.7

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[ywk253100]

Should be fixed by vmware-tanzu/velero-plugin-for-microsoft-azure#131

[yyvess]

@ywk253100 Still an issue with ZRS volume during the restore.
Disks are always created with a Zone specified but for ZRS volume the Zone must not be set other this error is raise :
rpc error: code = Unknown desc = compute.DisksClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code="OperationNotAllowed" Message="A disk with sku 'StandardSSD_ZRS' cannot be created in an availability zone

I have prepared a PR to fix it =>
vmware-tanzu/velero-plugin-for-microsoft-azure#134