Version:

$ openshift-install version
openshift-install 4.9.0-0.nightly-2021-11-22-163611
built from commit 1c538b8949f3a0e5b993e1ae33b9cd799806fa93
release image registry.ci.openshift.org/ocp/release@sha256:fe24e3d144e10d481076cac138a9ed8b6ecb1e3d3b25b5e3f2c91e49c2b03552
release architecture amd64

Platform:

Azure

Please specify:
UPI 

What happened?

Not each of the VM size in the allowedValue of VM Size in ARM templates work, and not all of the allowed VM Size are listed.

such as Standard_A2 are PremiumIO=false, can no be used.


What did you expect to happen?

list the vm sizes which we can used in doc
For Azure, the vm size needs to match the following: 
1. PremiumIO=true
2. HyperVGenerations Contains 'V1'
3. vCPUsAvailable and  MemoryGB meet the following minimum requirements: 
worker VM: 4 vCPUsAvaliable, 8GB Memory
master VM: 8 vCPUsAvaliable, 16GB Memory


How to reproduce it (as minimally and precisely as possible)?

Based on https://docs.openshift.com/container-platform/4.9/installing/installing_azure/installing-azure-user-infra.html
Specify the bootstrapVMSize parameter with "Standard_A2" in 04_bootstrap.json ARM template https://docs.openshift.com/container-platform/4.9/installing/installing_azure/installing-azure-user-infra.html#installation-arm-bootstrap_installing-azure-user-infra

az deployment group create -g $RESOURCE_GROUP --template-file "04_bootstrap.json" --parameters bootstrapIgnition="$BOOTSTRAP_IGNITION" --parameters sshKeyData="$SSH_KEY"   --parameters baseName="$INFRA_ID" --parameters bootstrapVMSize="Standard_A2" --verbose

Got the following error:
{"status":"Failed","error":{"code":"DeploymentFailed","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.","details":[{"code":"BadRequest","message":"{\r\n  \"error\": {\r\n    \"code\": \"InvalidParameter\",\r\n    \"message\": \"Requested operation cannot be performed because the VM size Standard_A2 does not support the storage account type Premium_LRS of disk 'maxupr-fhk9c-bootstrap_OSDisk'. Consider updating the VM to a size that supports Premium storage.\",\r\n    \"target\": \"osDisk.managedDisk.storageAccountType\"\r\n  }\r\n}"}]}}

Anything else we need to know?

Suggest fix as AWS: https://github.com/openshift/installer/pull/5166