Merge pull request #70 from DNXLabs/feature/alb-internal-custom-target-group

feat: add alb_internal_default_target_group_arn variable

Author: thiago4go

README.md

@@ -75,6 +75,7 @@ module "ecs_apps" {
 | alb\_enable\_deletion\_protection | Enable deletion protection for ALBs | `bool` | `false` | no |
 | alb\_http\_listener | Whether to enable HTTP listeners | `bool` | `true` | no |
 | alb\_internal | Deploys a second internal ALB for private APIs. | `bool` | `false` | no |
+| alb\_internal\_default\_target\_group\_arn | ARN of target group to use as default action for internal ALB HTTPS listener. If empty, uses the default target group created by the module. | `string` | `""` | no |
 | alb\_internal\_ssl\_policy | The name of the SSL Policy for the listener. Required if protocol is HTTPS or TLS. | `string` | `"ELBSecurityPolicy-TLS-1-2-Ext-2018-06"` | no |
 | alb\_only | Whether to deploy only an alb and no cloudFront or not with the cluster. | `bool` | `false` | no |
 | alb\_sg\_allow\_alb\_test\_listener | Whether to allow world access to the test listeners | `bool` | `true` | no |

_variables.tf

@@ -132,6 +132,12 @@ variable "alb_internal_ssl_policy" {
   description = "The name of the SSL Policy for the listener. Required if protocol is HTTPS or TLS."
 }
 
+variable "alb_internal_default_target_group_arn" {
+  default     = ""
+  type        = string
+  description = "ARN of target group to use as default action for internal ALB HTTPS listener. If empty, uses the default target group created by the module."
+}
+
 variable "alb_drop_invalid_header_fields" {
   default     = true
   type        = bool

alb-internal.tf

@@ -44,7 +44,7 @@ resource "aws_lb_listener" "ecs_https_internal" {
 
   default_action {
     type             = "forward"
-    target_group_arn = aws_lb_target_group.ecs_default_https_internal[0].arn
+    target_group_arn = var.alb_internal_default_target_group_arn != "" ? var.alb_internal_default_target_group_arn : aws_lb_target_group.ecs_default_https_internal[0].arn
   }
 
   tags = merge(