Adding IPv6 assign on creation for public subnets

README.md

@@ -208,6 +208,7 @@ Sometimes it is handy to have public access to Redshift clusters (for example if
 | apigw\_endpoint\_security\_group\_ids | The ID of one or more security groups to associate with the network interface for API GW  endpoint | list(string) | `[]` | 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(string) | `[]` | 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 | bool | `"false"` | no |
+| assign\_ipv6\_address\_on\_creation | Specify `true` to indicate that network interfaces created in the specified subnet should be assigned an IPv6 address. Default is `false`. | bool | `"false"` | no |
 | azs | A list of availability zones in the region | list(string) | `[]` | 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 |
 | cloudtrail\_endpoint\_private\_dns\_enabled | Whether or not to associate a private hosted zone with the specified VPC for CloudTrail endpoint | bool | `"false"` | no |

main.tf

@@ -5,6 +5,7 @@ locals {
     length(var.database_subnets),
     length(var.redshift_subnets),
   )
+
   nat_gateway_count = var.single_nat_gateway ? 1 : var.one_nat_gateway_per_az ? length(var.azs) : local.max_subnet_length
 
   # Use `local.vpc_id` to give a hint to Terraform that subnets should be deleted before secondary CIDR blocks can be free!
@@ -250,10 +251,11 @@ resource "aws_route_table" "intra" {
 resource "aws_subnet" "public" {
   count = var.create_vpc && length(var.public_subnets) > 0 && (false == var.one_nat_gateway_per_az || length(var.public_subnets) >= length(var.azs)) ? length(var.public_subnets) : 0
 
-  vpc_id                  = local.vpc_id
-  cidr_block              = element(concat(var.public_subnets, [""]), count.index)
-  availability_zone       = element(var.azs, count.index)
-  map_public_ip_on_launch = var.map_public_ip_on_launch
+  vpc_id                          = local.vpc_id
+  cidr_block                      = element(concat(var.public_subnets, [""]), count.index)
+  availability_zone               = element(var.azs, count.index)
+  map_public_ip_on_launch         = var.map_public_ip_on_launch
+  assign_ipv6_address_on_creation = var.assign_ipv6_address_on_creation
 
   tags = merge(
     {
@@ -1595,4 +1597,3 @@ resource "aws_default_vpc" "this" {
     var.default_vpc_tags,
   )
 }
-

variables.tf

@@ -20,6 +20,12 @@ variable "assign_generated_ipv6_cidr_block" {
   default     = false
 }
 
+variable "assign_ipv6_address_on_creation" {
+  description = "Specify `true` to indicate that network interfaces created in the specified subnet should be assigned an IPv6 address. Default is `false`."
+  default     = false
+  type        = bool
+}
+
 variable "secondary_cidr_blocks" {
   description = "List of secondary CIDR blocks to associate with the VPC to extend the IP Address pool"
   type        = list(string)
@@ -1384,4 +1390,3 @@ variable "elasticache_outbound_acl_rules" {
     },
   ]
 }
-