Your First Terraform Project: Build a Complete AWS VPC in 20 Minutes

terraform-vpc/
├── main.tf
├── variables.tf
├── outputs.tf
└── terraform.tfvars

variable "region"      { default = "ap-south-1" }
variable "project"     { default = "myproject" }
variable "environment" { default = "dev" }

terraform {
  required_providers {
    aws = { source = "hashicorp/aws", version = "~> 5.0" }
  }
}

provider "aws" { region = var.region }

resource "aws_vpc" "main" {
  cidr_block           = "10.0.0.0/16"
  enable_dns_hostnames = true
  tags = { Name = "${var.project}-${var.environment}-vpc" }
}

resource "aws_subnet" "public" {
  count                   = 2
  vpc_id                  = aws_vpc.main.id
  cidr_block              = "10.0.${count.index}.0/24"
  availability_zone       = data.aws_availability_zones.available.names[count.index]
  map_public_ip_on_launch = true
}

resource "aws_nat_gateway" "main" {
  allocation_id = aws_eip.nat.id
  subnet_id     = aws_subnet.public[0].id
}

data "aws_availability_zones" "available" { state = "available" }

terraform init    # Download AWS provider
terraform plan    # Preview (23 resources)
terraform apply   # Type yes to create
terraform output  # See VPC ID and subnet IDs
terraform destroy # Clean up when done

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