Simple Terraform AWS Example - 3 tier application with:

Architecture

Application Load Balancer
Web Servers
- Autoscaling group
- Launch template for EC2 Instances
Database layer
- RDS MySQL

The image below shows the target architecture.

Initial setup

Terraform and Providers

Terraform 0.15.0 or higher
AWS Provider

Variables

variables.tf file - some of the variables are used at later stages
terraform.tfvars to populate variables

(up to here : tag initial_setup)

VPC