feat: Configurable default action https listener (#391)

feat: configurable default action https listener

Make the ALB https listener default action configurable

README.md

@@ -236,6 +236,7 @@ No resources.
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
 | <a name="input_alb"></a> [alb](#input\_alb) | Map of values passed to ALB module definition. See the [ALB module](https://github.com/terraform-aws-modules/terraform-aws-alb) for full list of arguments supported | `any` | `{}` | no |
+| <a name="input_alb_https_default_action"></a> [alb\_https\_default\_action](#input\_alb\_https\_default\_action) | Default action for the ALB https listener | `any` | <pre>{<br>  "forward": {<br>    "target_group_key": "atlantis"<br>  }<br>}</pre> | no |
 | <a name="input_alb_security_group_id"></a> [alb\_security\_group\_id](#input\_alb\_security\_group\_id) | ID of an existing security group that will be used by ALB. Required if `create_alb` is `false` | `string` | `""` | no |
 | <a name="input_alb_subnets"></a> [alb\_subnets](#input\_alb\_subnets) | List of subnets to place ALB in. Required if `create_alb` is `true` | `list(string)` | `[]` | no |
 | <a name="input_alb_target_group_arn"></a> [alb\_target\_group\_arn](#input\_alb\_target\_group\_arn) | ARN of an existing ALB target group that will be used to route traffic to the Atlantis service. Required if `create_alb` is `false` | `string` | `""` | no |

main.tf

@@ -78,11 +78,8 @@ module "alb" {
           protocol        = "HTTPS"
           ssl_policy      = try(var.alb.https_listener_ssl_policy, "ELBSecurityPolicy-TLS13-1-2-Res-2021-06")
           certificate_arn = var.create_certificate ? module.acm.acm_certificate_arn : var.certificate_arn
-
-          forward = {
-            target_group_key = "atlantis"
-          }
         },
+        var.alb_https_default_action,
         lookup(var.alb, "https_listener", {})
       )
     },

variables.tf

@@ -68,6 +68,16 @@ variable "alb" {
   default     = {}
 }
 
+variable "alb_https_default_action" {
+  description = "Default action for the ALB https listener"
+  type        = any
+  default = {
+    forward = {
+      target_group_key = "atlantis"
+    }
+  }
+}
+
 variable "alb_subnets" {
   description = "List of subnets to place ALB in. Required if `create_alb` is `true`"
   type        = list(string)