How do I add a new region on Reference Architecture?

[timrwilliams]

We have a Reference Architecture deployed with eu-west-2. We are now attempting to replicate a deployed service to another region (us-east-2). These deployments are independent versions of the same application that will be used by different customers.

Is there any guide on what folders/services/modules need to be duplicated to the new region? Certain setup on the RefArch appears to assume only one region will be used.

For example the sns-topics modules requires a KMS key based on a aws_region variable but the key is only created in the _global account_baseline setup so isn't accessible in the new region.

kms_master_key_id = dependency.account_baseline.outputs.kms_key_arns[local.aws_region]["cloudwatch-alarm-sns-encryption"]