add subject_alternative_names option

Author: Sohan

main.tf

@@ -38,9 +38,10 @@ resource "aws_acm_certificate" "import-cert" {
 resource "aws_acm_certificate" "cert" {
   count = var.enable_acm_certificate && var.enable_aws_certificate ? 1 : 0
 
-  domain_name       = var.domain_name
-  validation_method = var.validation_method
-  tags              = module.labels.tags
+  domain_name               = var.domain_name
+  validation_method         = var.validation_method
+  subject_alternative_names = var.subject_alternative_names
+  tags                      = module.labels.tags
   lifecycle {
     create_before_destroy = true
   }

variables.tf

@@ -50,6 +50,12 @@ variable "domain_name" {
   description = "A domain name for which the certificate should be issued."
 }
 
+variable "subject_alternative_names" {
+  type        = list(any)
+  default     = []
+  description = "Set of domains that should be SANs in the issued certificate. To remove all elements of a previously configured list, set this value equal to an empty list ([]) or use the terraform taint command to trigger recreation."
+}
+
 variable "validation_method" {
   type        = string
   default     = ""