Add option to create internal load balancer

Author: OlamideOl1

main.tf

@@ -5,6 +5,7 @@ module "alb" {
   description         = var.description
   name                = var.name
   enable_access_logs  = var.enable_access_logs
+  internal_alb        = var.internal_alb
   s3_logs_bucket_name = var.s3_logs_bucket_name
 
   namespace  = var.namespace

modules/alb/main.tf

@@ -1,5 +1,6 @@
 resource "aws_alb" "this" {
   name            = join("-", concat(var.namespace, [var.name]))
+  internal        = var.internal_alb
   security_groups = [aws_security_group.this.id]
 
   dynamic "access_logs" {

modules/alb/variables.tf

@@ -8,6 +8,12 @@ variable "enable_access_logs" {
   default     = false
   description = "Enable or disable ALB access logs. If set to true, logs will be stored in an S3 bucket."
 }
+
+variable "internal_alb" {
+  description = "If true, the LB will be internal. Defaults to false"
+  type        = bool
+  default     = false
+}
 variable "name" {
   description = "Name for this load balancer"
   type        = string

variables.tf

@@ -74,6 +74,12 @@ variable "hosted_zone_name" {
   default     = null
 }
 
+variable "internal_alb" {
+  description = "If true, the LB will be internal. Defaults to false"
+  type        = bool
+  default     = false
+}
+
 variable "issue_certificates" {
   description = "Set to false to disable creation of ACM certificates"
   type        = bool