feat[lb-domain]: add possibility to create dns record for "custom dom…

…ains" feature (#11)

lb-domain/main.tf

@@ -5,13 +5,17 @@ data "aws_lb" "ingress" {
   }
 }
 
-module "records" {
-  source  = "terraform-aws-modules/route53/aws//modules/records"
-  version = "~> 2.11"
-
-  zone_name = var.route53_zone_name
+data "aws_lb" "custom_domains_ingress" {
+  count = var.create_custom_domain_record ? 1 : 0
+  tags = {
+    Namespace     = var.namespace
+    Stage         = var.stage
+    custom_domains= "true"
+  }
+}
 
-  records = [
+locals {
+  main_dns_records = [
     {
       name = "*"
       type = "CNAME"
@@ -21,4 +25,28 @@ module "records" {
       ]
     }
   ]
+
+  custom_domain_dns_record = var.create_custom_domain_record ? {
+      name = var.custom_domain_record_value
+      type = "CNAME"
+      ttl  = 300
+      records = [
+        data.aws_lb.custom_domains_ingress.0.dns_name
+      ]
+    } : null
+
+  dns_records = concat(
+    local.main_dns_records,
+    var.create_custom_domain_record ? [ local.custom_domain_dns_record ] : []
+  )
+}
+
+
+module "records" {
+  source  = "terraform-aws-modules/route53/aws//modules/records"
+  version = "~> 2.11"
+
+  zone_name = var.route53_zone_name
+
+  records = local.dns_records
 }

lb-domain/variables.tf

@@ -13,6 +13,18 @@ variable "route53_zone_name" {
   description = "The name of the Route53 zone"
 }
 
+variable "create_custom_domain_record" {
+  type        = bool
+  description = "Define if a custom domain record should be created"
+  default     = false
+}
+
+variable "custom_domain_record_value" {
+  type        = string
+  description = "The value of the custom domain record"
+  default     = "custom-loadbalancer"
+}
+
 variable "tags" {
   type        = map(string)
   description = "A map of tags to add to all resources"