Adding the ability to adjust the target deregistration behavior

Signed-off-by: Steve Steiner <[email protected]>

modules/gwlb/main.tf

@@ -60,6 +60,7 @@ resource "aws_lb_target_group" "this" {
   #
   # tags = merge(var.global_tags, { Name = var.name }, var.lb_target_group_tags)
   tags = var.lb_target_group_tags
+
   target_failover {
     on_deregistration = var.on_deregistration
     on_unhealthy      = var.on_unhealthy

modules/gwlb/variables.tf

@@ -120,13 +120,21 @@ variable "unhealthy_threshold" {
 variable "on_deregistration" {
   description = "Indicates how the GWLB handles existing flows when a target is deregistered. Possible values are `rebalance` and `no_rebalance`. Must match the attribute value set for `on_unhealthy`. Default: `no_rebalance`"
   default     = "no_rebalance"
-  type        = string
+  validation {
+    condition     = var.on_unhealthy == var.on_deregistration
+    error_message = "Variable on_deregistration must be the same as variable on_unhealthy"
+  }
+  type = string
 }
 
 variable "on_unhealthy" {
   description = "Indicates how the GWLB handles existing flows when a target is unhealthy. Possible values are `rebalance` and `no_rebalance`. Must match the attribute value set for `on_deregistration`. Default: `no_rebalance`"
   default     = "no_rebalance"
-  type        = string
+  validation {
+    condition     = var.on_deregistration == var.on_unhealthy
+    error_message = "Variable on_unhealthy must be the same as variable on_deregistration"
+  }
+  type = string
 }
 
 variable "stickiness_type" {