From 5894129291a0e70581b4530780cc3975a28e6bb2 Mon Sep 17 00:00:00 2001
From: Himanshu Ahirwar <himanshu.ahirwar@clouddrove.com>
Date: Mon, 11 Dec 2023 20:03:09 +0530
Subject: [PATCH] feat: create A record for dns of alb and specified
 domain/subdomain name

---
 _example/alb/example.tf |  2 ++
 main.tf                 | 16 ++++++++++++++++
 variables.tf            | 24 ++++++++++++++++++++++++
 3 files changed, 42 insertions(+)

diff --git a/_example/alb/example.tf b/_example/alb/example.tf
index 79b6231..dc2f0e7 100644
--- a/_example/alb/example.tf
+++ b/_example/alb/example.tf
@@ -139,6 +139,8 @@ module "alb" {
   https_port                 = 443
   listener_type              = "forward"
   target_group_port          = 80
+  dns_record_name            = "example.clouddrove.ca"
+  hosted_zone_id             = "Z06XXXXXXXXXXXXXAL4"
 
   http_tcp_listeners = [
     {
diff --git a/main.tf b/main.tf
index afa0be9..c3323f0 100644
--- a/main.tf
+++ b/main.tf
@@ -790,3 +790,19 @@ resource "aws_lb_listener_certificate" "https_listener" {
   listener_arn    = aws_lb_listener.https[var.extra_ssl_certs[count.index]["https_listener_index"]].arn
   certificate_arn = var.extra_ssl_certs[count.index]["certificate_arn"]
 }
+
+##----------------------------------------------------------------------------------
+## A Route 53 record to map ELB DNS with specified domain/subdomain.
+##----------------------------------------------------------------------------------
+resource "aws_route53_record" "default" {
+  count = var.enable && var.dns_record_name != null ? 1 : 0
+
+  zone_id = var.hosted_zone_id
+  name    = var.dns_record_name
+  type    = var.dns_record_type
+  alias {
+    name                   = join("", aws_lb.main[*].dns_name)
+    zone_id                = join("", aws_lb.main[*].zone_id)
+    evaluate_target_health = var.evaluate_target_health
+  }
+}
\ No newline at end of file
diff --git a/variables.tf b/variables.tf
index 9e31b9b..9723ad8 100644
--- a/variables.tf
+++ b/variables.tf
@@ -450,3 +450,27 @@ variable "ipv6_cidr_blocks" {
   default     = ["::/0"]
   description = "Enable to create egress rule"
 }
+
+variable "hosted_zone_id" {
+  type        = string
+  default     = ""
+  description = "(Required) The ID of the hosted zone to contain this record."
+}
+
+variable "dns_record_name" {
+  type        = string
+  default     = null
+  description = "(Required) The name of the record. Example: `foo.bar.com` "
+}
+
+variable "dns_record_type" {
+  type        = string
+  default     = "A"
+  description = "(Required) The record type. Valid values are A, AAAA, CAA, CNAME, DS, MX, NAPTR, NS, PTR, SOA, SPF, SRV and TXT."
+}
+
+variable "evaluate_target_health" {
+  type        = bool
+  default     = false
+  description = "(Required) Set to true if you want Route 53 to determine whether to respond to DNS queries using this resource record set by checking the health of the resource record set. Some resources have special requirements, [see related part of documentation.](https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-values.html#rrsets-values-alias-evaluate-target-health)"
+}
\ No newline at end of file