Added support for default VPC resource (terraform-aws-modules#75)

Author: antonbabenko

README.md

@@ -21,6 +21,7 @@ These types of resources are supported:
 * [DHCP Options Set](https://www.terraform.io/docs/providers/aws/r/vpc_dhcp_options.html)
 * [Main VPC Routing Table](https://www.terraform.io/docs/providers/aws/r/main_route_table_assoc.html)
 * [Default VPC Routing Table](https://www.terraform.io/docs/providers/aws/r/default_route_table.html)
+* [Default VPC](https://www.terraform.io/docs/providers/aws/r/default_vpc.html)
 
 Usage
 -----
@@ -107,6 +108,7 @@ Examples
 
 * [Simple VPC](https://github.com/terraform-aws-modules/terraform-aws-vpc/tree/master/examples/simple-vpc)
 * [Complete VPC](https://github.com/terraform-aws-modules/terraform-aws-vpc/tree/master/examples/complete-vpc)
+* [Manage Default VPC](https://github.com/terraform-aws-modules/terraform-aws-vpc/tree/master/examples/manage-default-vpc)
 * Few tests and edge cases examples: [#46](https://github.com/terraform-aws-modules/terraform-aws-vpc/tree/master/examples/issue-46-no-private-subnets), [#44](https://github.com/terraform-aws-modules/terraform-aws-vpc/tree/master/examples/issue-44-asymmetric-private-subnets)
 
 

examples/manage-default-vpc/README.md

@@ -0,0 +1,19 @@
+Manage Default VPC
+==================
+
+Configuration in this directory does not create new VPC resources, but it adopts [Default VPC](https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/default-vpc.html) created by AWS to allow management of it using Terraform.
+
+This is not usual type of resource in Terraform, so use it carefully. More information is [here](https://www.terraform.io/docs/providers/aws/r/default_vpc.html).
+
+Usage
+=====
+
+To run this example you need to execute:
+
+```bash
+$ terraform init
+$ terraform plan
+$ terraform apply
+```
+
+Run `terraform destroy` when you don't need these resources.

examples/manage-default-vpc/main.tf

@@ -0,0 +1,13 @@
+provider "aws" {
+  region = "eu-west-1"
+}
+
+module "vpc" {
+  source = "../../"
+
+  create_vpc = false
+
+  manage_default_vpc               = true
+  default_vpc_name                 = "default"
+  default_vpc_enable_dns_hostnames = true
+}

examples/manage-default-vpc/outputs.tf

@@ -0,0 +1,10 @@
+# Default VPC
+output "default_vpc_id" {
+  description = "The ID of the Default VPC"
+  value       = "${module.vpc.default_vpc_id}"
+}
+
+output "default_vpc_cidr_block" {
+  description = "The CIDR block of the VPC"
+  value       = "${module.vpc.default_vpc_cidr_block}"
+}

main.tf

@@ -343,17 +343,27 @@ resource "aws_vpn_gateway" "this" {
 ###########
 # Defaults
 ###########
-resource "aws_default_route_table" "default" {
+resource "aws_default_vpc" "this" {
+  count = "${var.manage_default_vpc ? 1 : 0}"
+
+  enable_dns_support   = "${var.default_vpc_enable_dns_support}"
+  enable_dns_hostnames = "${var.default_vpc_enable_dns_hostnames}"
+  enable_classiclink   = "${var.default_vpc_enable_classiclink}"
+
+  tags = "${merge(var.tags, var.default_vpc_tags, map("Name", format("%s", var.default_vpc_name)))}"
+}
+
+resource "aws_default_route_table" "this" {
   count = "${var.create_vpc ? 1 : 0}"
 
   default_route_table_id = "${aws_vpc.this.default_route_table_id}"
 
   tags = "${merge(var.tags, var.default_route_table_tags, map("Name", format("%s-default", var.name)))}"
 }
 
-resource "aws_main_route_table_association" "default" {
+resource "aws_main_route_table_association" "this" {
   count = "${var.create_vpc ? 1 : 0}"
 
   vpc_id         = "${aws_vpc.this.id}"
-  route_table_id = "${aws_default_route_table.default.default_route_table_id}"
+  route_table_id = "${aws_default_route_table.this.default_route_table_id}"
 }

outputs.tf

@@ -24,6 +24,41 @@ output "default_route_table_id" {
   value       = "${element(concat(aws_vpc.this.*.default_route_table_id, list("")), 0)}"
 }
 
+output "vpc_instance_tenancy" {
+  description = "Tenancy of instances spin up within VPC"
+  value       = "${element(concat(aws_vpc.this.*.instance_tenancy, list("")), 0)}"
+}
+
+output "vpc_enable_dns_support" {
+  description = "Whether or not the VPC has DNS support"
+  value       = "${element(concat(aws_vpc.this.*.enable_dns_support, list("")), 0)}"
+}
+
+output "vpc_enable_dns_hostnames" {
+  description = "Whether or not the VPC has DNS hostname support"
+  value       = "${element(concat(aws_vpc.this.*.enable_dns_hostnames, list("")), 0)}"
+}
+
+output "vpc_enable_classiclink" {
+  description = "Whether or not the VPC has Classiclink enabled"
+  value       = "${element(concat(aws_vpc.this.*.enable_classiclink, list("")), 0)}"
+}
+
+output "vpc_main_route_table_id" {
+  description = "The ID of the main route table associated with this VPC"
+  value       = "${element(concat(aws_vpc.this.*.main_route_table_id, list("")), 0)}"
+}
+
+//output "vpc_ipv6_association_id" {
+//  description = "The association ID for the IPv6 CIDR block"
+//  value       = "${element(concat(aws_vpc.this.*.ipv6_association_id, list("")), 0)}"
+//}
+//
+//output "vpc_ipv6_cidr_block" {
+//  description = "The IPv6 CIDR block"
+//  value       = "${element(concat(aws_vpc.this.*.ipv6_cidr_block, list("")), 0)}"
+//}
+
 # Subnets
 output "private_subnets" {
   description = "List of IDs of private subnets"
@@ -153,3 +188,65 @@ output "vpc_endpoint_dynamodb_pl_id" {
   description = "The prefix list for the DynamoDB VPC endpoint."
   value       = "${element(concat(aws_vpc_endpoint.dynamodb.*.prefix_list_id, list("")), 0)}"
 }
+
+# Default VPC
+output "default_vpc_id" {
+  description = "The ID of the VPC"
+  value       = "${element(concat(aws_default_vpc.this.*.id, list("")), 0)}"
+}
+
+output "default_vpc_cidr_block" {
+  description = "The CIDR block of the VPC"
+  value       = "${element(concat(aws_default_vpc.this.*.cidr_block, list("")), 0)}"
+}
+
+output "default_vpc_default_security_group_id" {
+  description = "The ID of the security group created by default on VPC creation"
+  value       = "${element(concat(aws_default_vpc.this.*.default_security_group_id, list("")), 0)}"
+}
+
+output "default_vpc_default_network_acl_id" {
+  description = "The ID of the default network ACL"
+  value       = "${element(concat(aws_default_vpc.this.*.default_network_acl_id, list("")), 0)}"
+}
+
+output "default_vpc_default_route_table_id" {
+  description = "The ID of the default route table"
+  value       = "${element(concat(aws_default_vpc.this.*.default_route_table_id, list("")), 0)}"
+}
+
+output "default_vpc_instance_tenancy" {
+  description = "Tenancy of instances spin up within VPC"
+  value       = "${element(concat(aws_default_vpc.this.*.instance_tenancy, list("")), 0)}"
+}
+
+output "default_vpc_enable_dns_support" {
+  description = "Whether or not the VPC has DNS support"
+  value       = "${element(concat(aws_default_vpc.this.*.enable_dns_support, list("")), 0)}"
+}
+
+output "default_vpc_enable_dns_hostnames" {
+  description = "Whether or not the VPC has DNS hostname support"
+  value       = "${element(concat(aws_default_vpc.this.*.enable_dns_hostnames, list("")), 0)}"
+}
+
+output "default_vpc_enable_classiclink" {
+  description = "Whether or not the VPC has Classiclink enabled"
+  value       = "${element(concat(aws_default_vpc.this.*.enable_classiclink, list("")), 0)}"
+}
+
+output "default_vpc_main_route_table_id" {
+  description = "The ID of the main route table associated with this VPC"
+  value       = "${element(concat(aws_default_vpc.this.*.main_route_table_id, list("")), 0)}"
+}
+
+//output "default_vpc_ipv6_association_id" {
+//  description = "The association ID for the IPv6 CIDR block"
+//  value       = "${element(concat(aws_default_vpc.this.*.ipv6_association_id, list("")), 0)}"
+//}
+//
+//output "default_vpc_ipv6_cidr_block" {
+//  description = "The IPv6 CIDR block"
+//  value       = "${element(concat(aws_default_vpc.this.*.ipv6_cidr_block, list("")), 0)}"
+//}
+

variables.tf

@@ -204,3 +204,33 @@ variable "dhcp_options_netbios_node_type" {
   description = "Specify netbios node_type for DHCP options set"
   default     = ""
 }
+
+variable "manage_default_vpc" {
+  description = "Should be true to adopt and manage Default VPC"
+  default     = false
+}
+
+variable "default_vpc_name" {
+  description = "Name to be used on the Default VPC"
+  default     = ""
+}
+
+variable "default_vpc_enable_dns_support" {
+  description = "Should be true to enable DNS support in the Default VPC"
+  default     = true
+}
+
+variable "default_vpc_enable_dns_hostnames" {
+  description = "Should be true to enable DNS hostnames in the Default VPC"
+  default     = false
+}
+
+variable "default_vpc_enable_classiclink" {
+  description = "Should be true to enable ClassicLink in the Default VPC"
+  default     = false
+}
+
+variable "default_vpc_tags" {
+  description = "Additional tags for the Default VPC"
+  default     = {}
+}