Terraform: Struggling to Manage Dependencies in a Nested Module Structure with Remote State
I'm trying to debug I'm getting frustrated with I'm working on a project and hit a roadblock..... I'm working on a Terraform setup where I have a main module that calls multiple nested modules, each of which relies on outputs from the main module... I’m using remote state with AWS S3 and DynamoDB for state locking. However, I keep working with the behavior `"Module 'x' depends on a value that is not yet available"`, which I believe is related to the order of resource creation due to the nested dependencies. Here’s a simplified version of my `main.tf`: ```hcl module "network" { source = "./modules/network" } module "app" { source = "./modules/app" vpc_id = module.network.vpc_id } ``` In the `network` module, I have something like: ```hcl resource "aws_vpc" "main" { cidr_block = "10.0.0.0/16" } output "vpc_id" { value = aws_vpc.main.id } ``` And in the `app` module, I need the VPC ID: ```hcl variable "vpc_id" { description = "VPC ID for the application" type = string } resource "aws_instance" "app_server" { ami = "ami-abc123" instance_type = "t2.micro" vpc_security_group_ids = [var.vpc_id] } ``` I’ve tried using `terraform apply` multiple times, but it doesn’t resolve the dependency scenario. I’ve also checked the remote state configuration and verified that the state is being written correctly. Any suggestions on how to properly manage these dependencies in my modules? Could it be related to the timing of state refreshes, or how I'm referencing outputs? A detailed look into best practices for handling this kind of nested module dependency would really help. I'm working on a CLI tool that needs to handle this. I'd really appreciate any guidance on this. For context: I'm using Hcl on Windows. Am I missing something obvious? Is there a better approach? This is my first time working with Hcl stable.