Add IPv6 support

Author: bodgit

main.tf

@@ -131,7 +131,7 @@ data "aws_partition" "current" {}
 data "aws_region" "current" {}
 
 data "aws_route53_zone" "this" {
-  count = var.create_route53_record ? 1 : 0
+  count = var.create_route53_record || var.create_route53_aaaa_record ? 1 : 0
 
   name         = var.route53_zone_name
   private_zone = var.route53_private_zone
@@ -234,6 +234,8 @@ module "alb" {
     prefix  = var.alb_log_location_prefix
   }
 
+  ip_address_type = var.alb_ip_address_type
+
   enable_deletion_protection = var.alb_enable_deletion_protection
 
   drop_invalid_header_fields = var.alb_drop_invalid_header_fields
@@ -405,7 +407,7 @@ module "acm" {
 }
 
 ################################################################################
-# Route53 record
+# Route53 records
 ################################################################################
 resource "aws_route53_record" "atlantis" {
   count = var.create_route53_record ? 1 : 0
@@ -421,6 +423,20 @@ resource "aws_route53_record" "atlantis" {
   }
 }
 
+resource "aws_route53_record" "atlantis-AAAA" {
+  count = var.create_route53_aaaa_record ? 1 : 0
+
+  zone_id = data.aws_route53_zone.this[0].zone_id
+  name    = var.route53_record_name != null ? var.route53_record_name : var.name
+  type    = "AAAA"
+
+  alias {
+    name                   = module.alb.lb_dns_name
+    zone_id                = module.alb.lb_zone_id
+    evaluate_target_health = true
+  }
+}
+
 ################################################################################
 # EFS
 ################################################################################

variables.tf

@@ -231,7 +231,7 @@ variable "route53_private_zone" {
 }
 
 variable "create_route53_record" {
-  description = "Whether to create Route53 record for Atlantis"
+  description = "Whether to create Route53 A record for Atlantis"
   type        = bool
   default     = true
 }
@@ -688,3 +688,15 @@ variable "ephemeral_storage_size" {
     error_message = "The minimum supported value is 21 GiB and the maximum supported value is 200 GiB."
   }
 }
+
+variable "alb_ip_address_type" {
+  description = "The type of IP addresses used by the subnets for your load balancer"
+  type        = string
+  default     = "ipv4"
+}
+
+variable "create_route53_aaaa_record" {
+  description = "Whether to create Route53 AAAA record for Atlantis"
+  type        = bool
+  default     = false
+}