Merge pull request #248551 from AbhishekMallick-MS/Aug-17-2023-AKS

AKS support matrix updates

Author: prmerger-automator[bot]

articles/backup/azure-kubernetes-service-cluster-backup-support-matrix.md

@@ -2,7 +2,7 @@
 title: Azure Kubernetes Service (AKS) backup support matrix
 description: This article provides a summary of support settings and limitations of Azure Kubernetes Service (AKS) backup.
 ms.topic: conceptual
-ms.date: 03/27/2023
+ms.date: 08/17/2023
 ms.custom: references_regions
 ms.service: backup
 author: AbhishekMallick-MS
@@ -19,17 +19,19 @@ AKS backup is available in all the Azure public cloud regions: East US, North Eu
 
 ## Limitations
 
-- AKS backup supports AKS clusters with Kubernetes version 1.21.1 or later. This version has Container Storage Interface (CSI) drivers installed.
+- AKS backup supports AKS clusters with Kubernetes version *1.22* or later. This version has Container Storage Interface (CSI) drivers installed.
 
-- A CSI driver supports performing backup and restore operations for persistent volumes.
+- Before you install the backup extension in an AKS cluster, ensure that the CSI drivers and snapshot are enabled for your cluster. If they're disabled, [enable these settings](../aks/csi-storage-drivers.md#enable-csi-storage-drivers-on-an-existing-cluster).
 
-- Currently, an AKS backup supports only the backup of Azure disk-based persistent volumes (enabled by the CSI driver). If you're using Azure Files shares and Azure Blob Storage persistent volumes in your AKS clusters, you can configure backups for them via the Azure Backup solutions. For more information, see [About Azure file share backup](azure-file-share-backup-overview.md) and [Overview of Azure Blob Storage backup](blob-backup-overview.md).
+- AKS backups don't support in-tree volumes. You can back up only CSI driver-based volumes. You can [migrate from tree volumes to CSI driver-based persistent volumes](../aks/csi-migrate-in-tree-volumes.md).
 
-- AKS backups don't support tree volumes. You can back up only CSI driver-based volumes. You can [migrate from tree volumes to CSI driver-based persistent volumes](../aks/csi-migrate-in-tree-volumes.md).
+- Currently, an AKS backup supports only the backup of Azure disk-based persistent volumes (enabled by the CSI driver). Also, these persistent volumes should be dynamically provisioned as static volumes are not supported.
 
-- Before you install the backup extension in an AKS cluster, ensure that the CSI drivers and snapshot are enabled for your cluster. If they're disabled, [enable these settings](../aks/csi-storage-drivers.md#enable-csi-storage-drivers-on-an-existing-cluster).
+- Azure Files shares and Azure Blob Storage persistent volumes are currently not supported by AKS backup due to lack of CSI Driver-based snapshotting capability. If you're using said persistent volumes in your AKS clusters, you can configure backups for them via the Azure Backup solutions. For more information, see [Azure file share backup](azure-file-share-backup-overview.md) and [Azure Blob Storage backup](blob-backup-overview.md).
+
+- Any unsupported persistent volume type is skipped while a backup is being created for the AKS cluster.
 
-- The backup extension uses the AKS cluster's managed system identity to perform backup operations. So, an AKS backup doesn't support AKS clusters that use a service principal. You can [update your AKS cluster to use a managed system identity](../aks/use-managed-identity.md#enable-managed-identities-on-an-existing-aks-cluster).
+- The backup extension uses the AKS cluster's system identity to do the backup operations. Currently, AKS clusters using a User Identity, or a Service Principal aren't supported. If your AKS cluster uses a Service Principal, you can [update your AKS cluster to use a System Identity](../aks/use-managed-identity.md#enable-managed-identities-on-an-existing-aks-cluster).
 
 - You must install the backup extension in the AKS cluster. If you're using Azure CLI to install the backup extension, ensure that the version is 2.41 or later. Use `az upgrade` command to upgrade the Azure CLI.