launch the same cluster name in different Region does not work

[allamand]

When trying to reuse eksdemo with a cluster with the same name in another region won't work due to confilct in IAM role names

Resource handler returned message: "Resource of type 'AWS::IAM::Role' with identifier 'eksdemo.eksworkshop-eksctl.karpenter.karpenter' already exists." (RequestToken: 7f140197-586a-10bb-7463-2366bb6313ba, HandlerErrorCode: AlreadyExists)

would be nice If we can allow this by adding some kind of prefix in role names

[aaroniscode]

@allamand Can you take a look at the potential fix?

IRSA role names would be:

eksdemo.<region>.<cluster-name>.<namespace>.<service-account-name>

Role names above 64 characters are truncated and a hash is added to make them unique.

What do you think?