terraform-aws-vpc

TLDR;

Overview
Description
Usage
Inputs
Outputs
License

Overview

These types of resources are supported:

VPC
Subnet
Route
Route table
Internet Gateway
Network ACL
NAT Gateway
VPN Gateway
VPC Endpoint:
Gateway: S3, DynamoDB
Interface: EC2, SSM, EC2 Messages, SSM Messages, ECR API, ECR DKR, API Gateway
RDS DB Subnet Group
ElastiCache Subnet Group
Redshift Subnet Group
DHCP Options Set
Default VPC
Default Network ACL

External NAT Gateway IPs

By default this module will provision new Elastic IPs for the VPC's NAT Gateways. This means that when creating a new VPC, new IPs are allocated, and when that VPC is destroyed those IPs are released. Sometimes it is handy to keep the same IPs even after the VPC is destroyed and re-created. To that end, it is possible to assign existing IPs to the NAT Gateways. This prevents the destruction of the VPC from releasing those IPs, while making it possible that a re-created VPC uses the same IPs.

To achieve this, allocate the IPs outside the VPC module declaration.

resource "aws_eip" "nat" {
  count = 3

  vpc = true
}

Then, pass the allocated IPs as a parameter to this module.

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

  # The rest of arguments are omitted for brevity

  enable_nat_gateway  = true
  single_nat_gateway  = false
  reuse_nat_ips       = true                      # <= Skip creation of EIPs for the NAT Gateways
  external_nat_ip_ids = ["${aws_eip.nat.*.id}"]   # <= IPs specified here as input to the module
}

Note that in the example we allocate 3 IPs because we will be provisioning 3 NAT Gateways (due to single_nat_gateway = false and having 3 subnets). If, on the other hand, single_nat_gateway = true, then aws_eip.nat would only need to allocate 1 IP. Passing the IPs into the module is done by setting two variables reuse_nat_ips = true and external_nat_ip_ids = ["${aws_eip.nat.*.id}"].

NAT Gateway Scenarios

This module supports three scenarios for creating NAT gateways. Each will be explained in further detail in the corresponding sections.

One NAT Gateway per subnet (default behavior)
- enable_nat_gateway = true
- single_nat_gateway = false
- one_nat_gateway_per_az = false
Single NAT Gateway
- enable_nat_gateway = true
- single_nat_gateway = true
- one_nat_gateway_per_az = false
One NAT Gateway per availability zone
- enable_nat_gateway = true
- single_nat_gateway = false
- one_nat_gateway_per_az = true

If both single_nat_gateway and one_nat_gateway_per_az are set to true, then single_nat_gateway takes precedence.

One NAT Gateway per subnet (default)

By default, the module will determine the number of NAT Gateways to create based on the the max() of the private subnet lists (database_subnets, elasticache_subnets, private_subnets, and redshift_subnets). The module does not take into account the number of intra_subnets, since the latter are designed to have no Internet access via NAT Gateway. For example, if your configuration looks like the following:

database_subnets    = ["10.0.21.0/24", "10.0.22.0/24"]
elasticache_subnets = ["10.0.31.0/24", "10.0.32.0/24"]
private_subnets     = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24", "10.0.4.0/24", "10.0.5.0/24"]
redshift_subnets    = ["10.0.41.0/24", "10.0.42.0/24"]
intra_subnets       = ["10.0.51.0/24", "10.0.52.0/24", "10.0.53.0/24"]

Then 5 NAT Gateways will be created since 5 private subnet CIDR blocks were specified.

Single NAT Gateway

If single_nat_gateway = true, then all private subnets will route their Internet traffic through this single NAT gateway. The NAT gateway will be placed in the first public subnet in your public_subnets block.

One NAT Gateway per availability zone

If one_nat_gateway_per_az = true and single_nat_gateway = false, then the module will place one NAT gateway in each availability zone you specify in var.azs. There are some requirements around using this feature flag:

The variable var.azs must be specified.
The number of public subnet CIDR blocks specified in public_subnets must be greater than or equal to the number of availability zones specified in var.azs. This is to ensure that each NAT Gateway has a dedicated public subnet to deploy to.

"private" versus "intra" subnets

By default, if NAT Gateways are enabled, private subnets will be configured with routes for Internet traffic that point at the NAT Gateways configured by use of the above options.

If you need private subnets that should have no Internet routing (in the sense of RFC1918 Category 1 subnets), intra_subnets should be specified. An example use case is configuration of AWS Lambda functions within a VPC, where AWS Lambda functions only need to pass traffic to internal resources or VPC endpoints for AWS services.

Since AWS Lambda functions allocate Elastic Network Interfaces in proportion to the traffic received (read more), it can be useful to allocate a large private subnet for such allocations, while keeping the traffic they generate entirely internal to the VPC.

You can add additional tags with intra_subnet_tags as with other subnet types.

Conditional creation

Sometimes you need to have a way to create VPC resources conditionally but Terraform does not allow to use count inside module block, so the solution is to specify argument create_vpc.

# This VPC will not be created
module "vpc" {
  source = "terraform-aws-modules/vpc/aws"

  create_vpc = false
  # ... omitted
}

Public access to RDS instances

Sometimes it is handy to have public access to RDS instances (it is not recommended for production) by specifying these arguments:

  create_database_subnet_group           = true
  create_database_subnet_route_table     = true
  create_database_internet_gateway_route = true

  enable_dns_hostnames = true
  enable_dns_support   = true

Network Access Control Lists (ACL or NACL)

This module can manage network ACL and rules. Once VPC is created, AWS creates the default network ACL, which can be controlled using this module (manage_default_network_acl = true).

Also, each type of subnet may have its own network ACL with custom rules per subnet. Eg, set public_dedicated_network_acl = true to use dedicated network ACL for the public subnets; set values of public_inbound_acl_rules and public_outbound_acl_rules to specify all the NACL rules you need to have on public subnets (see variables.tf for default values and structures).

By default, all subnets are associated with the default network ACL.

Public access to Redshift cluster

Sometimes it is handy to have public access to Redshift clusters (for example if you need to access it by Kinesis - VPC endpoint for Kinesis is not yet supported by Redshift) by specifying these arguments:

  enable_public_redshift = true  # <= By default Redshift subnets will be associated with the private route table

Terraform version

Terraform version 0.10.3 or newer is required for this module to work.

Examples

Simple VPC
Complete VPC
Manage Default VPC
Network ACL
Few tests and edge cases examples: #46, #44, #108

Description

Terraform module for Network Management on AWS.

Usage

provider "aws" {
  region = "eu-west-1"
}

data "aws_security_group" "default" {
  name   = "default"
  vpc_id = "${module.vpc.vpc_id}"
}

module "vpc" {
  source = "../../"

  name = "complete-example"

  cidr = "10.10.0.0/16"

  azs                 = ["eu-west-1a", "eu-west-1b", "eu-west-1c"]
  private_subnets     = ["10.10.1.0/24", "10.10.2.0/24", "10.10.3.0/24"]
  public_subnets      = ["10.10.11.0/24", "10.10.12.0/24", "10.10.13.0/24"]
  database_subnets    = ["10.10.21.0/24", "10.10.22.0/24", "10.10.23.0/24"]
  elasticache_subnets = ["10.10.31.0/24", "10.10.32.0/24", "10.10.33.0/24"]
  redshift_subnets    = ["10.10.41.0/24", "10.10.42.0/24", "10.10.43.0/24"]
  intra_subnets       = ["10.10.51.0/24", "10.10.52.0/24", "10.10.53.0/24"]

  create_database_subnet_group = false

  enable_dns_hostnames = true
  enable_dns_support   = true

  enable_nat_gateway = true
  single_nat_gateway = true

  enable_vpn_gateway = true

  enable_dhcp_options              = true
  dhcp_options_domain_name         = "service.consul"
  dhcp_options_domain_name_servers = ["127.0.0.1", "10.10.0.2"]

  # VPC endpoint for S3
  enable_s3_endpoint = true

  # VPC endpoint for DynamoDB
  enable_dynamodb_endpoint = true

  # VPC endpoint for SSM
  enable_ssm_endpoint              = true
  ssm_endpoint_private_dns_enabled = true
  ssm_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"] # ssm_endpoint_subnet_ids = ["..."]

  # VPC endpoint for SSMMESSAGES
  enable_ssmmessages_endpoint              = true
  ssmmessages_endpoint_private_dns_enabled = true
  ssmmessages_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"]

  # VPC Endpoint for EC2
  enable_ec2_endpoint              = true
  ec2_endpoint_private_dns_enabled = true
  ec2_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"]

  # VPC Endpoint for EC2MESSAGES
  enable_ec2messages_endpoint              = true
  ec2messages_endpoint_private_dns_enabled = true
  ec2messages_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"]

  # VPC Endpoint for ECR API
  enable_ecr_api_endpoint              = true
  ecr_api_endpoint_private_dns_enabled = true
  ecr_api_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"]

  # VPC Endpoint for ECR DKR
  enable_ecr_dkr_endpoint              = true
  ecr_dkr_endpoint_private_dns_enabled = true
  ecr_dkr_endpoint_security_group_ids  = ["${data.aws_security_group.default.id}"]

  tags = {
    Owner       = "user"
    Environment = "staging"
    Name        = "complete"
  }
}

Inputs

Name	Description	Type	Default	Required
amazon_side_asn	The Autonomous System Number (ASN) for the Amazon side of the gateway. By default the virtual private gateway is created with the current default Amazon ASN.	string	`"64512"`	no
apigw_endpoint_private_dns_enabled	Whether or not to associate a private hosted zone with the specified VPC for API GW endpoint	string	`"false"`	no
apigw_endpoint_security_group_ids	The ID of one or more security groups to associate with the network interface for API GW endpoint	list	`<list>`	no
apigw_endpoint_subnet_ids	The ID of one or more subnets in which to create a network interface for API GW endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used.	list	`<list>`	no
assign_generated_ipv6_cidr_block	Requests an Amazon-provided IPv6 CIDR block with a /56 prefix length for the VPC. You cannot specify the range of IP addresses, or the size of the CIDR block	string	`"false"`	no
azs	A list of availability zones in the region	list	`<list>`	no
cidr	The CIDR block for the VPC. Default value is a valid CIDR, but not acceptable by AWS and should be overridden	string	`"0.0.0.0/0"`	no
create_database_internet_gateway_route	Controls if an internet gateway route for public database access should be created	string	`"false"`	no
create_database_nat_gateway_route	Controls if a nat gateway route should be created to give internet access to the database subnets	string	`"false"`	no
create_database_subnet_group	Controls if database subnet group should be created	string	`"true"`	no
create_database_subnet_route_table	Controls if separate route table for database should be created	string	`"false"`	no
create_elasticache_subnet_group	Controls if elasticache subnet group should be created	string	`"true"`	no
create_elasticache_subnet_route_table	Controls if separate route table for elasticache should be created	string	`"false"`	no
create_redshift_subnet_group	Controls if redshift subnet group should be created	string	`"true"`	no
create_redshift_subnet_route_table	Controls if separate route table for redshift should be created	string	`"false"`	no
create_vpc	Controls if VPC should be created (it affects almost all resources)	string	`"true"`	no
database_acl_tags	Additional tags for the database subnets network ACL	map	`<map>`	no
database_dedicated_network_acl	Whether to use dedicated network ACL (not default) and custom rules for database subnets	string	`"false"`	no
database_inbound_acl_rules	Database subnets inbound network ACL rules	list	`<list>`	no
database_outbound_acl_rules	Database subnets outbound network ACL rules	list	`<list>`	no
database_route_table_tags	Additional tags for the database route tables	map	`<map>`	no
database_subnet_group_tags	Additional tags for the database subnet group	map	`<map>`	no
database_subnet_suffix	Suffix to append to database subnets name	string	`"db"`	no
database_subnet_tags	Additional tags for the database subnets	map	`<map>`	no
database_subnets	A list of database subnets	list	`<list>`	no
default_network_acl_egress	List of maps of egress rules to set on the Default Network ACL	list	`<list>`	no
default_network_acl_ingress	List of maps of ingress rules to set on the Default Network ACL	list	`<list>`	no
default_network_acl_name	Name to be used on the Default Network ACL	string	`""`	no
default_network_acl_tags	Additional tags for the Default Network ACL	map	`<map>`	no
default_vpc_enable_classiclink	Should be true to enable ClassicLink in the Default VPC	string	`"false"`	no
default_vpc_enable_dns_hostnames	Should be true to enable DNS hostnames in the Default VPC	string	`"false"`	no
default_vpc_enable_dns_support	Should be true to enable DNS support in the Default VPC	string	`"true"`	no
default_vpc_name	Name to be used on the Default VPC	string	`""`	no
default_vpc_tags	Additional tags for the Default VPC	map	`<map>`	no
dhcp_options_domain_name	Specifies DNS name for DHCP options set	string	`""`	no
dhcp_options_domain_name_servers	Specify a list of DNS server addresses for DHCP options set, default to AWS provided	list	`<list>`	no
dhcp_options_netbios_name_servers	Specify a list of netbios servers for DHCP options set	list	`<list>`	no
dhcp_options_netbios_node_type	Specify netbios node_type for DHCP options set	string	`""`	no
dhcp_options_ntp_servers	Specify a list of NTP servers for DHCP options set	list	`<list>`	no
dhcp_options_tags	Additional tags for the DHCP option set	map	`<map>`	no
ec2_endpoint_private_dns_enabled	Whether or not to associate a private hosted zone with the specified VPC for EC2 endpoint	string	`"false"`	no
ec2_endpoint_security_group_ids	The ID of one or more security groups to associate with the network interface for EC2 endpoint	list	`<list>`	no
ec2_endpoint_subnet_ids	The ID of one or more subnets in which to create a network interface for EC2 endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used.	list	`<list>`	no
ec2messages_endpoint_private_dns_enabled	Whether or not to associate a private hosted zone with the specified VPC for EC2MESSAGES endpoint	string	`"false"`	no
ec2messages_endpoint_security_group_ids	The ID of one or more security groups to associate with the network interface for EC2MESSAGES endpoint	list	`<list>`	no
ec2messages_endpoint_subnet_ids	The ID of one or more subnets in which to create a network interface for EC2MESSAGES endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used.	list	`<list>`	no
ecr_api_endpoint_private_dns_enabled	Whether or not to associate a private hosted zone with the specified VPC for ECR API endpoint	string	`"false"`	no
ecr_api_endpoint_security_group_ids	The ID of one or more security groups to associate with the network interface for ECR API endpoint	list	`<list>`	no
ecr_api_endpoint_subnet_ids	The ID of one or more subnets in which to create a network interface for ECR api endpoint. If omitted, private subnets will be used.	list	`<list>`	no
ecr_dkr_endpoint_private_dns_enabled	Whether or not to associate a private hosted zone with the specified VPC for ECR DKR endpoint	string	`"false"`	no
ecr_dkr_endpoint_security_group_ids	The ID of one or more security groups to associate with the network interface for ECR DKR endpoint	list	`<list>`	no
ecr_dkr_endpoint_subnet_ids	The ID of one or more subnets in which to create a network interface for ECR dkr endpoint. If omitted, private subnets will be used.	list	`<list>`	no
elasticache_acl_tags	Additional tags for the elasticache subnets network ACL	map	`<map>`	no
elasticache_dedicated_network_acl	Whether to use dedicated network ACL (not default) and custom rules for elasticache subnets	string	`"false"`	no
elasticache_inbound_acl_rules	Elasticache subnets inbound network ACL rules	list	`<list>`	no
elasticache_outbound_acl_rules	Elasticache subnets outbound network ACL rules	list	`<list>`	no
elasticache_route_table_tags	Additional tags for the elasticache route tables	map	`<map>`	no
elasticache_subnet_suffix	Suffix to append to elasticache subnets name	string	`"elasticache"`	no
elasticache_subnet_tags	Additional tags for the elasticache subnets	map	`<map>`	no
elasticache_subnets	A list of elasticache subnets	list	`<list>`	no
enable_apigw_endpoint	Should be true if you want to provision an api gateway endpoint to the VPC	string	`"false"`	no
enable_dhcp_options	Should be true if you want to specify a DHCP options set with a custom domain name, DNS servers, NTP servers, netbios servers, and/or netbios server type	string	`"false"`	no
enable_dns_hostnames	Should be true to enable DNS hostnames in the VPC	string	`"false"`	no
enable_dns_support	Should be true to enable DNS support in the VPC	string	`"true"`	no
enable_dynamodb_endpoint	Should be true if you want to provision a DynamoDB endpoint to the VPC	string	`"false"`	no
enable_ec2_endpoint	Should be true if you want to provision an EC2 endpoint to the VPC	string	`"false"`	no
enable_ec2messages_endpoint	Should be true if you want to provision an EC2MESSAGES endpoint to the VPC	string	`"false"`	no
enable_ecr_api_endpoint	Should be true if you want to provision an ecr api endpoint to the VPC	string	`"false"`	no
enable_ecr_dkr_endpoint	Should be true if you want to provision an ecr dkr endpoint to the VPC	string	`"false"`	no
enable_nat_gateway	Should be true if you want to provision NAT Gateways for each of your private networks	string	`"false"`	no
enable_public_redshift	Controls if redshift should have public routing table	string	`"false"`	no
enable_s3_endpoint	Should be true if you want to provision an S3 endpoint to the VPC	string	`"false"`	no
enable_ssm_endpoint	Should be true if you want to provision an SSM endpoint to the VPC	string	`"false"`	no
enable_ssmmessages_endpoint	Should be true if you want to provision a SSMMESSAGES endpoint to the VPC	string	`"false"`	no
enable_vpn_gateway	Should be true if you want to create a new VPN Gateway resource and attach it to the VPC	string	`"false"`	no
external_nat_ip_ids	List of EIP IDs to be assigned to the NAT Gateways (used in combination with reuse_nat_ips)	list	`<list>`	no
igw_tags	Additional tags for the internet gateway	map	`<map>`	no
instance_tenancy	A tenancy option for instances launched into the VPC	string	`"default"`	no
intra_acl_tags	Additional tags for the intra subnets network ACL	map	`<map>`	no
intra_dedicated_network_acl	Whether to use dedicated network ACL (not default) and custom rules for intra subnets	string	`"false"`	no
intra_inbound_acl_rules	Intra subnets inbound network ACLs	list	`<list>`	no
intra_outbound_acl_rules	Intra subnets outbound network ACLs	list	`<list>`	no
intra_route_table_tags	Additional tags for the intra route tables	map	`<map>`	no
intra_subnet_suffix	Suffix to append to intra subnets name	string	`"intra"`	no
intra_subnet_tags	Additional tags for the intra subnets	map	`<map>`	no
intra_subnets	A list of intra subnets	list	`<list>`	no
manage_default_network_acl	Should be true to adopt and manage Default Network ACL	string	`"false"`	no
manage_default_vpc	Should be true to adopt and manage Default VPC	string	`"false"`	no
map_public_ip_on_launch	Should be false if you do not want to auto-assign public IP on launch	string	`"true"`	no
name	Name to be used on all the resources as identifier	string	`""`	no
nat_eip_tags	Additional tags for the NAT EIP	map	`<map>`	no
nat_gateway_tags	Additional tags for the NAT gateways	map	`<map>`	no
one_nat_gateway_per_az	Should be true if you want only one NAT Gateway per availability zone. Requires `var.azs` to be set, and the number of `public_subnets` created to be greater than or equal to the number of availability zones specified in `var.azs`.	string	`"false"`	no
private_acl_tags	Additional tags for the private subnets network ACL	map	`<map>`	no
private_dedicated_network_acl	Whether to use dedicated network ACL (not default) and custom rules for private subnets	string	`"false"`	no
private_inbound_acl_rules	Private subnets inbound network ACLs	list	`<list>`	no
private_outbound_acl_rules	Private subnets outbound network ACLs	list	`<list>`	no
private_route_table_tags	Additional tags for the private route tables	map	`<map>`	no
private_subnet_suffix	Suffix to append to private subnets name	string	`"private"`	no
private_subnet_tags	Additional tags for the private subnets	map	`<map>`	no
private_subnets	A list of private subnets inside the VPC	list	`<list>`	no
propagate_private_route_tables_vgw	Should be true if you want route table propagation	string	`"false"`	no
propagate_public_route_tables_vgw	Should be true if you want route table propagation	string	`"false"`	no
public_acl_tags	Additional tags for the public subnets network ACL	map	`<map>`	no
public_dedicated_network_acl	Whether to use dedicated network ACL (not default) and custom rules for public subnets	string	`"false"`	no
public_inbound_acl_rules	Public subnets inbound network ACLs	list	`<list>`	no
public_outbound_acl_rules	Public subnets outbound network ACLs	list	`<list>`	no
public_route_table_tags	Additional tags for the public route tables	map	`<map>`	no
public_subnet_suffix	Suffix to append to public subnets name	string	`"public"`	no
public_subnet_tags	Additional tags for the public subnets	map	`<map>`	no
public_subnets	A list of public subnets inside the VPC	list	`<list>`	no
redshift_acl_tags	Additional tags for the redshift subnets network ACL	map	`<map>`	no
redshift_dedicated_network_acl	Whether to use dedicated network ACL (not default) and custom rules for redshift subnets	string	`"false"`	no
redshift_inbound_acl_rules	Redshift subnets inbound network ACL rules	list	`<list>`	no
redshift_outbound_acl_rules	Redshift subnets outbound network ACL rules	list	`<list>`	no
redshift_route_table_tags	Additional tags for the redshift route tables	map	`<map>`	no
redshift_subnet_group_tags	Additional tags for the redshift subnet group	map	`<map>`	no
redshift_subnet_suffix	Suffix to append to redshift subnets name	string	`"redshift"`	no
redshift_subnet_tags	Additional tags for the redshift subnets	map	`<map>`	no
redshift_subnets	A list of redshift subnets	list	`<list>`	no
reuse_nat_ips	Should be true if you don't want EIPs to be created for your NAT Gateways and will instead pass them in via the 'external_nat_ip_ids' variable	string	`"false"`	no
secondary_cidr_blocks	List of secondary CIDR blocks to associate with the VPC to extend the IP Address pool	list	`<list>`	no
single_nat_gateway	Should be true if you want to provision a single shared NAT Gateway across all of your private networks	string	`"false"`	no
ssm_endpoint_private_dns_enabled	Whether or not to associate a private hosted zone with the specified VPC for SSM endpoint	string	`"false"`	no
ssm_endpoint_security_group_ids	The ID of one or more security groups to associate with the network interface for SSM endpoint	list	`<list>`	no
ssm_endpoint_subnet_ids	The ID of one or more subnets in which to create a network interface for SSM endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used.	list	`<list>`	no
ssmmessages_endpoint_private_dns_enabled	Whether or not to associate a private hosted zone with the specified VPC for SSMMESSAGES endpoint	string	`"false"`	no
ssmmessages_endpoint_security_group_ids	The ID of one or more security groups to associate with the network interface for SSMMESSAGES endpoint	list	`<list>`	no
ssmmessages_endpoint_subnet_ids	The ID of one or more subnets in which to create a network interface for SSMMESSAGES endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used.	list	`<list>`	no
tags	A map of tags to add to all resources	map	`<map>`	no
vpc_tags	Additional tags for the VPC	map	`<map>`	no
vpn_gateway_id	ID of VPN Gateway to attach to the VPC	string	`""`	no
vpn_gateway_tags	Additional tags for the VPN gateway	map	`<map>`	no

Outputs

Name	Description
azs	A list of availability zones specified as argument to this module
database_network_acl_id	ID of the database network ACL
database_route_table_ids	List of IDs of database route tables
database_subnet_group	ID of database subnet group
database_subnets	List of IDs of database subnets
database_subnets_cidr_blocks	List of cidr_blocks of database subnets
default_network_acl_id	The ID of the default network ACL
default_route_table_id	The ID of the default route table
default_security_group_id	The ID of the security group created by default on VPC creation
default_vpc_cidr_block	The CIDR block of the VPC
default_vpc_default_network_acl_id	The ID of the default network ACL
default_vpc_default_route_table_id	The ID of the default route table
default_vpc_default_security_group_id	The ID of the security group created by default on VPC creation
default_vpc_enable_dns_hostnames	Whether or not the VPC has DNS hostname support
default_vpc_enable_dns_support	Whether or not the VPC has DNS support
default_vpc_id	The ID of the VPC
default_vpc_instance_tenancy	Tenancy of instances spin up within VPC
default_vpc_main_route_table_id	The ID of the main route table associated with this VPC
elasticache_network_acl_id	ID of the elasticache network ACL
elasticache_route_table_ids	List of IDs of elasticache route tables
elasticache_subnet_group	ID of elasticache subnet group
elasticache_subnet_group_name	Name of elasticache subnet group
elasticache_subnets	List of IDs of elasticache subnets
elasticache_subnets_cidr_blocks	List of cidr_blocks of elasticache subnets
igw_id	The ID of the Internet Gateway
intra_network_acl_id	ID of the intra network ACL
intra_route_table_ids	List of IDs of intra route tables
intra_subnets	List of IDs of intra subnets
intra_subnets_cidr_blocks	List of cidr_blocks of intra subnets
nat_ids	List of allocation ID of Elastic IPs created for AWS NAT Gateway
nat_public_ips	List of public Elastic IPs created for AWS NAT Gateway
natgw_ids	List of NAT Gateway IDs
private_network_acl_id	ID of the private network ACL
private_route_table_ids	List of IDs of private route tables
private_subnets	List of IDs of private subnets
private_subnets_cidr_blocks	List of cidr_blocks of private subnets
public_network_acl_id	ID of the public network ACL
public_route_table_ids	List of IDs of public route tables
public_subnets	List of IDs of public subnets
public_subnets_cidr_blocks	List of cidr_blocks of public subnets
redshift_network_acl_id	ID of the redshift network ACL
redshift_route_table_ids	List of IDs of redshift route tables
redshift_subnet_group	ID of redshift subnet group
redshift_subnets	List of IDs of redshift subnets
redshift_subnets_cidr_blocks	List of cidr_blocks of redshift subnets
vgw_id	The ID of the VPN Gateway
vpc_cidr_block	The CIDR block of the VPC
vpc_enable_dns_hostnames	Whether or not the VPC has DNS hostname support
vpc_enable_dns_support	Whether or not the VPC has DNS support
vpc_endpoint_dynamodb_id	The ID of VPC endpoint for DynamoDB
vpc_endpoint_dynamodb_pl_id	The prefix list for the DynamoDB VPC endpoint.
vpc_endpoint_ec2_dns_entry	The DNS entries for the VPC Endpoint for EC2.
vpc_endpoint_ec2_id	The ID of VPC endpoint for EC2
vpc_endpoint_ec2_network_interface_ids	One or more network interfaces for the VPC Endpoint for EC2
vpc_endpoint_ec2messages_dns_entry	The DNS entries for the VPC Endpoint for EC2MESSAGES.
vpc_endpoint_ec2messages_id	The ID of VPC endpoint for EC2MESSAGES
vpc_endpoint_ec2messages_network_interface_ids	One or more network interfaces for the VPC Endpoint for EC2MESSAGES
vpc_endpoint_s3_id	The ID of VPC endpoint for S3
vpc_endpoint_s3_pl_id	The prefix list for the S3 VPC endpoint.
vpc_endpoint_ssm_dns_entry	The DNS entries for the VPC Endpoint for SSM.
vpc_endpoint_ssm_id	The ID of VPC endpoint for SSM
vpc_endpoint_ssm_network_interface_ids	One or more network interfaces for the VPC Endpoint for SSM.
vpc_endpoint_ssmmessages_dns_entry	The DNS entries for the VPC Endpoint for SSMMESSAGES.
vpc_endpoint_ssmmessages_id	The ID of VPC endpoint for SSMMESSAGES
vpc_endpoint_ssmmessages_network_interface_ids	One or more network interfaces for the VPC Endpoint for SSMMESSAGES.
vpc_id	The ID of the VPC
vpc_instance_tenancy	Tenancy of instances spin up within VPC
vpc_main_route_table_id	The ID of the main route table associated with this VPC
vpc_secondary_cidr_blocks	List of secondary CIDR blocks of the VPC

License

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.

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.chglog		.chglog
.circleci		.circleci
examples		examples
test/integration/default		test/integration/default
.README.md		.README.md
.editorconfig		.editorconfig
.gitignore		.gitignore
.kitchen.yml		.kitchen.yml
.pre-commit-config.yaml		.pre-commit-config.yaml
.ruby-version		.ruby-version
CHANGELOG.md		CHANGELOG.md
Gemfile		Gemfile
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
README.orig.md		README.orig.md
README.yml		README.yml
io.md		io.md
main.tf		main.tf
outputs.tf		outputs.tf
release.mk		release.mk
terraform-aws-vpc.iml		terraform-aws-vpc.iml
terraform.md		terraform.md
variables.tf		variables.tf
versions.tf		versions.tf

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terraform-aws-vpc

TLDR;

Overview

External NAT Gateway IPs

NAT Gateway Scenarios

One NAT Gateway per subnet (default)

Single NAT Gateway

One NAT Gateway per availability zone

"private" versus "intra" subnets

Conditional creation

Public access to RDS instances

Network Access Control Lists (ACL or NACL)

Public access to Redshift cluster

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Terraform module for Network Management on AWS.

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terraform-aws-vpc

TLDR;

Overview

External NAT Gateway IPs

NAT Gateway Scenarios

One NAT Gateway per subnet (default)

Single NAT Gateway

One NAT Gateway per availability zone

"private" versus "intra" subnets

Conditional creation

Public access to RDS instances

Network Access Control Lists (ACL or NACL)

Public access to Redshift cluster

Terraform version

Examples

Description

Terraform module for Network Management on AWS.

Usage

Inputs

Outputs

License

About

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