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Terraform Module Causing Unexpected Resource Duplication in AWS

👀 Views: 98 💬 Answers: 1 📅 Created: 2025-07-02
terraform aws s3 HCL

I'm reviewing some code and I've spent hours debugging this and I tried several approaches but none seem to work... I'm relatively new to this, so bear with me... I'm working on a personal project and Hey everyone, I'm running into an issue that's driving me crazy. I'm encountering an issue with my Terraform setup where a module is causing AWS resources to be duplicated each time I run `terraform apply`. I'm using Terraform 1.4.0 with AWS provider version 4.0.0. Specifically, I'm trying to manage multiple S3 buckets through a module for different environments, but every time I apply the changes, it seems to recreate the resources instead of recognizing them as already existing. Here's the relevant part of my code: ```hcl module "s3_bucket" { source = "./modules/s3" bucket_name = "my-app-${var.environment}-bucket" region = var.region } ``` And in my `modules/s3/main.tf`: ```hcl resource "aws_s3_bucket" "this" { bucket = var.bucket_name acl = "private" } ``` The `bucket_name` variable is defined as follows: ```hcl variable "bucket_name" { description = "The name of the S3 bucket" type = string } ``` I'm passing `environment` as a variable that changes depending on whether I'm deploying to `dev`, `stage`, or `prod`. However, I've noticed that even if I run `terraform apply` without changing anything, Terraform treats the S3 bucket as a new resource and attempts to create it again. Additionally, I see the following warning during the apply: ``` Warning: "bucket": A bucket with this name already exists ``` I’ve tried using the `terraform import` command to import the existing S3 bucket into the state, but it still results in the same behavior, and I am unsure if I've imported it correctly. Any insights on what might be causing this duplication and how to resolve it would be greatly appreciated! Am I missing something in my module setup or variable handling? For context: I'm using Hcl on Windows. What am I doing wrong? My development environment is macOS. I'd really appreciate any guidance on this. For context: I'm using Hcl on Linux. What's the best practice here? For context: I'm using Hcl on Linux. What am I doing wrong? Any ideas how to fix this? This is happening in both development and production on Ubuntu 22.04. I'm working with Hcl in a Docker container on Windows 10. Could someone point me to the right documentation?