Merge pull request #114 from vmware-tanzu/cherry-pick-readme-change

Add verified environment information.

README.md

@@ -18,6 +18,12 @@ For all other storage systems, please check with your storage vendor.  If your s
 durable snapshot storage you may want to consider 
 [Velero's Restic Integration](https://velero.io/docs/latest/restic)
 
+## Verified environment
+Velero CSI plugin v0.3 is tested with Velero v1.9 on the following environments:
+* EKS: ebs.csi.aws.com driver is tested with helm chart version helm-chart-aws-ebs-csi-driver-2.6.8 and external-snapshotter version is v5.0.1. v6.0.1 external-snapshotter is also tested with EBS CSI driver helm chart version helm-chart-aws-ebs-csi-driver-2.6.10.
+* AKS: disk.csi.azure.com driver is tested. CSI related controllers are installed in control plane, so cannot find the exactly version. Tested AKS versions are 1.23.3 and v1.22.6.
+* GKE: pd.csi.storage.gke.io driver is tested. CSI related controllers are installed in control plane, so cannot find the exactly version. Tested GKE versions are 1.23.5-gke.1501 and 1.22.8-gke.201.
+
 ## Compatibility
 
 Below is a listing of plugin versions and respective Velero versions that are compatible.