Add option to create internal load balancer

Author: OlamideOl1

main.tf

@@ -9,6 +9,7 @@ module "alb" {
   tags                = var.tags
   vpc_id              = var.vpc_id
   enable_access_logs  = var.enable_access_logs
+  internal_alb        = var.internal_alb
   s3_logs_bucket_name = var.s3_logs_bucket_name
 }
 

modules/alb/main.tf

@@ -1,5 +1,6 @@
 resource "aws_alb" "this" {
   name            = var.name
+  internal        = var.internal_alb
   security_groups = [aws_security_group.this.id]
 
   dynamic "connection_logs" {

modules/alb/variables.tf

@@ -15,6 +15,12 @@ variable "enable_connection_logs" {
   description = "Enable or disable ALB connection 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

@@ -67,7 +67,11 @@ variable "issue_certificate_domains" {
   type        = list(string)
   default     = []
 }
-
+variable "internal_alb" {
+  description = "If true, the LB will be internal. Defaults to false"
+  type        = bool
+  default     = false
+}
 variable "legacy_target_group_names" {
   description = "Names of legacy target groups which should be included"
   type        = list(string)