CodexBloom - Programming Q&A Platform

Terraform Not Recognizing Updated Variable Values in Module for Conditional Resource Creation

👀 Views: 29 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-23
terraform aws ec2 modules HCL

I'm testing a new approach and I'm deploying to production and I recently switched to I've been working on this all day and I am using Terraform v1.3.0 and facing an issue where my variable changes are not being recognized when I update a module for conditional resource creation. I have a module that creates AWS EC2 instances based on the value of a variable that defines an environment type, which can be either `staging` or `production`. Here's a snippet of my `variables.tf` file: ```hcl variable "environment_type" { description = "The environment type for this deployment" type = string default = "staging" } ``` In my main configuration file, I am calling the module like this: ```hcl module "ec2_instances" { source = "./modules/ec2" environment_type = var.environment_type } ``` Inside the module, I use this variable to conditionally create resources: ```hcl resource "aws_instance" "my_instance" { count = var.environment_type == "production" ? 1 : 0 ami = "ami-0c55b159cbfafe1f0" instance_type = "t2.micro" tags = { Name = "${var.environment_type}-instance" } } ``` When I initially applied the configuration with `environment_type` set to `staging`, it created no instances as expected. However, after changing the variable to `production` in my `terraform.tfvars` file and running `terraform apply`, it still shows that no instances will be created. I have tried running `terraform apply -refresh=true` and also confirmed that my `terraform.tfvars` file is being correctly loaded by adding an output to print the variable: ```hcl output "env_type" { value = var.environment_type } ``` This correctly outputs `production`, but the instance is still not created. I also checked for any potential issues in the module itself and ensured that the logic for the conditional creation is correct. Could the issue be related to how Terraform caches the state? Any insights on how to resolve this would be greatly appreciated! How would you solve this? This is for a desktop app running on Debian. What would be the recommended way to handle this?