[root@ip-172-31-61-209 learn-terraform-modules-use]# more *.tf
::::::::::::::
main.tf
::::::::::::::
provider "aws" {
  region = "ap-northeast-2"

  default_tags {
    tags = {
      hashicorp-learn = "module-use"
    }
  }
}

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "3.14.0"

  name = var.vpc_name
  cidr = var.vpc_cidr

  azs             = var.vpc_azs
  private_subnets = var.vpc_private_subnets
  public_subnets  = var.vpc_public_subnets

  enable_nat_gateway = var.vpc_enable_nat_gateway

  tags = var.vpc_tags
}

module "ec2_instances" {
  source  = "terraform-aws-modules/ec2-instance/aws"
  version = "3.5.0"
  count   = 2

  name = "my-ec2-cluster"

  ami                    = "ami-09cf633fe86e51bf0"
  instance_type          = "t2.micro"
  vpc_security_group_ids = [module.vpc.default_security_group_id]
  subnet_id              = module.vpc.public_subnets[0]

  tags = {
    Terraform   = "true"
    Environment = "dev"
  }
}
::::::::::::::
outputs.tf
::::::::::::::
output "vpc_public_subnets" {
  description = "IDs of the VPC's public subnets"
  value       = module.vpc.public_subnets
}

output "ec2_instance_public_ips" {
  description = "Public IP addresses of EC2 instances"
  value       = module.ec2_instances[*].public_ip
}
::::::::::::::
terraform.tf
::::::::::::::
terraform {
  /* Uncomment this block to use Terraform Cloud for this tutorial
  cloud {
    organization = "organization-name"
    workspaces {
      name = "learn-terraform-module-use"
    }
  }
  */

  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.4.0"
    }
  }
  required_version = ">= 1.1.0"
}
::::::::::::::
variables.tf
::::::::::::::
variable "vpc_name" {
  description = "Name of VPC"
  type        = string
  default     = "example-vpc"
}

variable "vpc_cidr" {
  description = "CIDR block for VPC"
  type        = string
  default     = "10.0.0.0/16"
}

variable "vpc_azs" {
  description = "Availability zones for VPC"
  type        = list(string)
  default     = ["ap-northeast-2a", "ap-northeast-2c"]
}

variable "vpc_private_subnets" {
  description = "Private subnets for VPC"
  type        = list(string)
  default     = ["10.0.1.0/24", "10.0.2.0/24"]
}

variable "vpc_public_subnets" {
  description = "Public subnets for VPC"
  type        = list(string)
  default     = ["10.0.101.0/24", "10.0.102.0/24"]
}

variable "vpc_enable_nat_gateway" {
  description = "Enable NAT gateway for VPC"
  type        = bool
  default     = true
}

variable "vpc_tags" {
  description = "Tags to apply to resources created by VPC module"
  type        = map(string)
  default = {
    Terraform   = "true"
    Environment = "dev"
  }
}
[root@ip-172-31-61-209 learn-terraform-modules-use]#