VPC Module

This module is called within the infrastructure repository to create a new AWS VPC.

Root Module

To instantiate the module, create a root module with the following files:

main.tf

module "vpc" {
  source = "git@github.com:TerraformDesignPattern/vpc.git"

  aws_account        = "${var.aws_account}"
  availability_zones = "${var.availability_zones}"
  aws_region         = "${var.aws_region}"
  private_subnets    = "${var.private_subnets}"
  public_subnets     = "${var.public_subnets}"
  vpc_cidr           = "${var.vpc_cidr}"
  vpc_name           = "${var.vpc_name}"
}

variables.tf

As a personal preference, I try to only define data in variable files.

variable "aws_accont" {}

variable "aws_region" {}

variable "vpc_name" {}

variable "availability_zones" {
  default = [
    "us-east-1b",
    "us-east-1c",
    "us-east-1d"
  ]
}

variable "private_subnets" {
  default = [
    "172.19.1.0/24",
    "172.19.2.0/24",
    "172.19.3.0/24"
  ]
}

variable "public_subnets" {
  default = [
    "172.19.101.0/24",
    "172.19.102.0/24",
    "172.19.103.0/24"
  ]
}

variable "vpc_cidr" {
  default = "172.19.0.0/16"
}

outputs.tf

Export the module's outputs so environment service modules can use the state data.

output "availability_zones" {
  value = "${var.availability_zones}"
}

output "internet_gateway_id" {
  value = "${module.vpc.internet_gateway_id}"
}

output "nat_eips" {
  value = ["${module.vpc.nat_eips}"]
}

output "private_route_table_ids" {
  value = ["${module.vpc.private_route_table_ids}"]
}

output "private_subnet_cidr_blocks" {
  value = ["${module.vpc.private_subnet_cidr_blocks}"]
}

output "private_subnet_ids" {
  value = ["${module.vpc.private_subnet_ids}"]
}

output "public_route_table_ids" {
  value = ["${module.vpc.public_route_table_ids}"]
}

output "public_subnet_cidr_blocks" {
  value = ["${module.vpc.public_subnet_cidr_blocks}"]
}

output "public_subnet_ids" {
  value = ["${module.vpc.public_subnet_ids}"]
}

output "vpc_cidr_block" {
  value = "${module.vpc.vpc_cidr_block}"
}

output "vpc_id" {
  value = "${module.vpc.vpc_id}"
}

output "vpc_name" {
  value = "${var.vpc_name}"
}