Description of problem:
When “iopsPerGB” parameter is not set, event for AWS EBS CSI Driver provisioning is not clear

Version-Release number of selected component (if applicable):
4.7.0-rc.3

How reproducible:
Always

Steps to Reproduce:
Create a storageclass with the following yaml file
$ cat sc-csi.yaml 
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: io1-csi
parameters:
  type: io1
provisioner: ebs.csi.aws.com
reclaimPolicy: Delete
volumeBindingMode: Immediate
Create a PVC using this storageclass


Actual results:
PV is not provisioned. Check the events:
Warning  ProvisioningFailed    3s               ebs.csi.aws.com_ip-10-0-158-46_2aa28a47-d1e8-4570-9a4d-c4b35ea9f5cf  failed to provision volume with StorageClass "io1-csi": rpc error: code = Internal desc = Could not create volume "pvc-b64c726a-a494-4ce7-bbb1-72822526f160": could not create volume in EC2: InvalidParameterCombination: The parameter iops must be specified for io1 volumes.
           status code: 400, request id: 625e97aa-8238-4a80-92c4-36fde3561c1e

The event said, parameter “iops” should be set here, per the doc: https://github.com/openshift/aws-ebs-csi-driver, seems parameter “iopsPerGB” should be set here.

Create a storageclass with the following yaml file, PV is provisioned successfully:
$ cat sc.yaml 
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: io1-csi
parameters:
  type: io1
  iopsPerGB: "50"
provisioner: ebs.csi.aws.com
reclaimPolicy: Delete
volumeBindingMode: Immediate


Expected results:
With a clearer event to indicate the “iopsPerGB” parameter needs to be set here.

Master Log:

Node Log (of failed PODs):

PV Dump:

PVC Dump:

StorageClass Dump (if StorageClass used by PV/PVC):

Additional info: