2025-04-23 Agenda: Terragrunt Stacks (Session 2)

[yhakbar]

This session will take place in the Terragrunt Discord from 16:30 ET / 20:30 GMT - 17:00 ET / 21:00 GMT on 2025/04/23.

• How does the new terragrunt.stack.hcl file work?
• How do new terragrunt stack commands work?
• Quick Terragrunt Stacks demo.
• Any community feedback on Terragrunt Stacks that needs to be addressed before marking the functionality generally available.

[rshettynj]

Thanks very much. Can you please cover "for_each" usage in the session? One of the requirement we are struggling to understand is how can we create/manage say 20 CIDR rules (Egress and Ingress rules.) for an AWS security group.

[yhakbar]

Hey @rshettynj ,

I hope to see you in attendance! We don't plan on supporting anything like for_each in terragrunt.stack.hcl files by the time stacks are GA, but I'm happy to discuss the topic!

You can see an example of how a stack might setup an SG rule here:
https://github.com/gruntwork-io/terragrunt-infrastructure-catalog-example/blob/main/examples/terragrunt/stacks/stateful-asg-service/terragrunt.stack.hcl#L77-L92

To be clear, that doesn't use for_each, and I think you might object that it's not convenient enough at the scale of 20 CIDR rules.