Which action would make it easier to manage multiple Regions?
Name each AMI in the new Region exactly the same as the equivalent AMI in the first Region.
Duplicate the stack so unique AMI names can be coded into the appropriate stack.
Create an alias for each AMI so that an AMI can be referenced by a common name across Regions.
Create a Mappings section in the stack, and define the Region to AMI associations.
Explanations:
Naming each AMI the same in different Regions would not work because AMIs are Region-specific and cannot be referenced by the same name across different Regions.
Duplicating the stack with unique AMI names would lead to code duplication and a maintenance burden, making it difficult to manage resources across multiple Regions.
AMIs cannot be referenced by aliases across Regions, as they are Region-specific. This solution would not allow for cross-Region reference or management.
Using a Mappings section in the CloudFormation template allows the association of specific AMIs with different Regions. This enables the stack to dynamically choose the correct AMI based on the Region, making it reusable across multiple Regions.
I value that the answer is:
Create a Mappings section in the stack, and define the Region to AMI associations.