Terraform scenarios: how to to Reference Output Variable from Module in Different State Files
I'm optimizing some code but Could someone explain I've been banging my head against this for hours. I'm currently working on a Terraform setup where I have a main configuration that uses a module to provision AWS resources. The question arises when I try to reference an output variable from this module in another state file that manages a different set of resources. I have the following module defined in `modules/my_module/main.tf`: ```hcl output "instance_id" { value = aws_instance.my_instance.id } ``` When I call this module in my main configuration, I can see the output being generated correctly: ```hcl module "my_module" { source = "./modules/my_module" ... } output "my_instance_id" { value = module.my_module.instance_id } ``` The scenario arises when I attempt to use this output in a different Terraform configuration that manages a separate set of resources: ```hcl data "terraform_remote_state" "my_module_state" { backend = "s3" config = { bucket = "my-terraform-state-bucket" key = "path/to/my_module/terraform.tfstate" region = "us-west-2" } } resource "aws_lambda_function" "example" { function_name = "my_lambda_function" ... environment { INSTANCE_ID = data.terraform_remote_state.my_module_state.outputs.instance_id } } ``` However, when I run `terraform plan`, I get the following behavior message: ``` behavior: Invalid reference on main.tf line 12, in environment: 12: INSTANCE_ID = data.terraform_remote_state.my_module_state.outputs.instance_id References to attributes must be in the form <RESOURCE_TYPE>.<RESOURCE_NAME>.<ATTRIBUTE>, but "data.terraform_remote_state.my_module_state.outputs.instance_id" does not match this format. ``` I've tried various approaches, including ensuring that the remote state is initialized correctly and verifying the output variable is set in the source module. I even checked the state file manually to confirm that the `instance_id` is present. It seems like I'm missing something crucial in referencing outputs across different state files. Any insights or suggestions on how to address this scenario would be greatly appreciated! Am I missing something obvious? I'm using Hcl 3.11 in this project. Any ideas how to fix this?