Support for AWS gp3 EBS volumes

1. Proposed title of this feature request

Support for AWS gp3 EBS volumes

2. What is the nature and description of the request?

In December 2020, AWS introduced new Amazon EBS general purpose volumes (gp3): https://aws.amazon.com/about-aws/whats-new/2020/12/introducing-new-amazon-ebs-general-purpose-volumes-gp3/

The CSI driver included in OpenShift Container Platform 4.6 does currently not support this new type of EBS volume and will fail with the following error message:

'failed to provision volume with StorageClass "gp3-csi": rpc error: code = Internal desc = Could not create volume "pvc-9adaa804-2626-41d9-aed6-ac231e56ab24": invalid AWS VolumeType "gp3"'

3. Why does the customer need this?

Customer is using AWS as his standard public cloud provider and the new "gp3" volume is more cost-effective than "gp2" ($0.08/GB-month vs. $0.10/GB-month). The customer would like to be able to use the new volumes also for OCP.

General purpose SSD volumes make it easy and cost effective for customers to meet the IOPS and throughput requirements for transaction-intensive workloads that they want to run on OCP.

4. List any affected packages or components.

• aws-ebs-csi-driver