Terraform Module Repository

This repository contains Terraform code for deploying a highly available web server cluster across multiple AWS environments.

Repository structure

• modules/services/webserver-cluster/

  • Reusable module for a web server cluster
  • Deploys an AWS Application Load Balancer, Auto Scaling Group, launch template, and security groups
  • Supports VPC/subnet injection, environment tagging, and health check configuration

• dev/services/webserver-cluster/

  • Development environment root configuration
  • Uses the shared webserver-cluster module

• production/services/webserver-cluster/

  • Production environment root configuration
  • Uses the shared webserver-cluster module

• live/dev/services/webserver-cluster/

  • Live deployment configuration for the dev environment

• live/production/services/webserver-cluster/

  • Live deployment configuration for the production environment

Goals

• Deploy a fault-tolerant web server cluster
• Use an ALB for public HTTP traffic
• Use an Auto Scaling Group for instance scaling and replacement
• Support multiple environments with shared module logic

How to use

1. Change into the environment directory you want to deploy.

cd c:\Users\user\Desktop\Projects\terraform_module\dev\services\webserver-cluster

2. Initialize Terraform.

terraform init

3. Review the planned changes.

terraform plan

4. Apply the deployment.

terraform apply

Notes

• The module defaults to the AWS default VPC and subnets when no vpc_id or subnet_ids are provided.
• You can customize instance size, scaling limits, and environment metadata in the root module configuration.
• The production and dev root configs currently set distinctive cluster_name, environment, instance_type, and scaling values.

Recommended next steps

• Add remote state backend configuration for each environment
• Add provider version constraints and required Terraform providers
• Use separate workspaces or directories for environment isolation
• Secure secrets and avoid committing sensitive data