Terraform AWS Network Module

Terraform module which creates VPC, Subnet, IG, EIP, NAT Gateway on AWS.

This module is to help you create vpc resources in AWS. Please refer to Examples for examples of usage. In the following, I will explain the usage and structure in a simple way.

Usage

#######
# VPC #
#######
module "network" {
  source = "../../"

  project_name     = "simple"
  environment_name = "example"

  vpc_cidr           = "10.0.0.0/16"
  region_name        = "ap-northeast-2"
  availability_zones = ["a", "c"]

  without_nat       = false
  create_nat_per_az = true
  nat_deploy_module = "bastion"

  public_subnets = {
    front = ["10.0.0.0/21", /* "10.0.8.0/21", */ "10.0.16.0/21", /* "10.0.24.0/21" */]
    # front2  = ["10.0.32.0/21", "10.0.40.0/21", "10.0.48.0/21", "10.0.56.0/21"]
    bastion = ["10.0.62.0/26", /* "10.0.62.64/26", */ "10.0.62.128/26", /* "10.0.62.192/26" */]
  }

  public_subnets_tag = {
    front = {
      "kubernetes.io/role/elb" = 1
    }
  }

  private_subnets = {
    personal = ["10.0.64.0/20", /* "10.0.80.0/20", */ "10.0.96.0/20", /* "10.0.112.0/20" */]
    # rest     = ["10.0.128.0/20", "10.0.144.0/20", "10.0.160.0/20", "10.0.176.0/20"]
    database = ["10.0.192.0/21", /* "10.0.200.0/21", */ "10.0.208.0/21", /* "10.0.216.0/21" */]
  }

  private_subnets_tag = {
    personal = {
      "kubernetes.io/role/internal-elb" = 1
    }
  }
}

Requirements

Name	Version
aws	~> 4.0

Providers

Name	Version
aws	~> 4.0

Modules

Name	Source	Version
namer	cawcaw253/namer/aws	1.0.0
region	cawcaw253/region/aws	1.0.0

Resources

Name	Type
aws_eip.nat	resource
aws_internet_gateway.this	resource
aws_nat_gateway.this	resource
aws_route.internet_gateway	resource
aws_route.nat_gateway	resource
aws_route_table.private_route	resource
aws_route_table.public_route	resource
aws_route_table_association.private_route	resource
aws_route_table_association.public_route	resource
aws_subnet.private_subnet	resource
aws_subnet.public_subnet	resource
aws_vpc.this	resource

Inputs

Name	Description	Type	Default	Required
availability_zones	list of availability zones which use	list(string)	[ "a", "b" ]	no
create_nat_per_az	Boolean value for create nat gateway per availability zones. If value is true, create nat gateway per azs, if false create only 1 nat gateway and share it	bool	true	no
default_tags	Default tags	map(string)	{}	no
environment_name	Name of environment	string	"dev"	no
nat_deploy_module	The name of the module in which to deploy the NAT gateway. Module is key value of public_subnets variable.	string	null	no
private_subnets	Configurations of private subnet	map(list(string))	n/a	yes
private_subnets_tag	Setting tag to specific private subnet	map(map(string))	{}	no
project_name	Name of project	string	n/a	yes
public_subnets	Configurations of public subnet	map(list(string))	n/a	yes
public_subnets_tag	Setting tag to specific public subnet	map(map(string))	{}	no
region_name	name of aws region. if not set value, it automatically set providers current region.	string	null	no
vpc_cidr	CIDR Block for the VPC	string	n/a	yes
without_nat	Boolean value for using nat gateway or not	bool	false	no

Outputs

Name	Description
availability_zones	List of Availability Zones where subnets were created
igw_id	The ID of the Internet Gateway
nat_gateway_ids	IDs of the NAT Gateways created
private_route_table_ids	IDs of the created private route tables
private_subnet_cidrs	CIDR list of private subnets
private_subnet_ids	ID list of private subnets
public_route_table_ids	IDs of the created public route tables
public_subnet_cidrs	CIDR list of public subnets
public_subnet_ids	ID list of public subnets
vpc_arn	The ARN of the VPC
vpc_cidr_block	The primary IPv4 CIDR block of the VPC
vpc_id	ID of the VPC