Optional remote state

Terraform
1

We have a scenario where we have a microservice (A) that needs to pull additional information about another microservice (B). basically AWS security groups so it can allow the other microservice to hit it. This sounds like a good scenario for remote state except for one thing: In a case where the A is being developed in isolation, we don’t want to require B to be deployed. We can say, based on a flag, use ternary syntax to pull information from the remote state, but by that point, the remote state has already been refreshed, and I believe would fail if it doesn’t exist (i.e. the refresh isn’t done on an as needed basis).

What are my options?

2

Just have an optional variable you can pass in for the security group details for your module.

Then wherever you use the module you can either not specify (no B deployed) or add the remote state code to pull in the details and pass it through.