For the viya-iac-k8s repo you can use bare-metal or VMware. Tanzu is not supported. As for virtual machines, the customer must have the correct number of machines to support their installation of SAS. We provide some example files in the repo to illustrate this.
As for recommendations, if they are looking for a cluster that would run SAS Viya on a cluster that has been designed for this I would suggest they use the viya4-iac-k8s repo. It does simplify things.
Just note that using the code base does require between 10-15 if not more virtual machines to support that SAS software. This can be scaled down, but again, since on-prem or virtual machines are not dynamically scalable the infra must be there from the beginning.
Hope this helps.
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