Add support for specifying AZ in VPN Gateway

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
 - repo: git://github.com/antonbabenko/pre-commit-terraform
-  rev: v1.26.0
+  rev: v1.27.0
   hooks:
     - id: terraform_fmt
     - id: terraform_docs

README.md

@@ -510,6 +510,7 @@ It is possible to integrate this VPC module with [terraform-aws-transit-gateway
 | transferserver\_endpoint\_subnet\_ids | The ID of one or more subnets in which to create a network interface for Transfer Server endpoint. Only a single subnet within an AZ is supported. If omitted, private subnets will be used. | `list(string)` | `[]` | no |
 | vpc\_endpoint\_tags | Additional tags for the VPC Endpoints | `map(string)` | `{}` | no |
 | vpc\_tags | Additional tags for the VPC | `map(string)` | `{}` | no |
+| vpn\_gateway\_az | The Availability Zone for the VPN Gateway | `string` | `""` | 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(string)` | `{}` | no |
 

main.tf

@@ -1020,8 +1020,9 @@ resource "aws_customer_gateway" "this" {
 resource "aws_vpn_gateway" "this" {
   count = var.create_vpc && var.enable_vpn_gateway ? 1 : 0
 
-  vpc_id          = local.vpc_id
-  amazon_side_asn = var.amazon_side_asn
+  vpc_id            = local.vpc_id
+  amazon_side_asn   = var.amazon_side_asn
+  availability_zone = length(var.vpn_gateway_az) != 0 ? var.vpn_gateway_az : null
 
   tags = merge(
     {

variables.tf

@@ -1327,6 +1327,11 @@ variable "amazon_side_asn" {
   default     = "64512"
 }
 
+variable "vpn_gateway_az" {
+  description = "The Availability Zone for the VPN Gateway"
+  default     = ""
+}
+
 variable "propagate_private_route_tables_vgw" {
   description = "Should be true if you want route table propagation"
   type        = bool