EBS CSI Driver upgrade

Hello,

Before upgrading to EKS 1.23, You observed the storage classes EBS and EFS in your cluster. So you want to confirm whether it is needed to update both EBS and EFS Drivers in this scenario.

1. You mentioned that your pods are using EFS storage class for PV/PVC so considering that you are not using EBS volumes for your pods anywhere in your cluster, you can proceed with the EKS upgrade to 1.23. As mentioned in the release notes[1] also that it is required to upgrade EBS driver.
2. It is not required to update EFS CSI Driver before EKS 1.23 upgrade whereas EBS CSI Driver should be updated/migrated from the Kubernetes in-tree to container storage interface (CSI) . Please see the FAQ section using [3].
3. You can use the latest minus one version for EFS CSI Driver but it is recommended to use the latest version.

Note: Please do the EKS upgrade process in similar non-production environments before replicating in the production environments.

I hope this information is helpful.

[1] https://docs.aws.amazon.com/eks/latest/userguide/kubernetes-versions.html#kubernetes-1.23 [2] https://docs.aws.amazon.com/eks/latest/userguide/efs-csi.html [3] https://docs.aws.amazon.com/eks/latest/userguide/ebs-csi-migration-faq.html