fix: add extra validation to the global_event_routing_settings to e…

…nsure only one of the supported target regions are passed. Supported regions are currently "eu-gb", "eu-de", "au-syd", "us-east", "us-south", "eu-es" (#401)

examples/observability_at_event_routing/variables.tf

@@ -89,7 +89,7 @@ variable "metadata_region_backup" {
 variable "permitted_target_regions" {
   type        = list(string)
   description = "List of regions where target can be defined."
-  default     = ["us-south", "eu-de", "us-east", "eu-gb", "au-syd"]
+  default     = ["us-south", "eu-de", "us-east", "eu-es", "eu-gb", "au-syd"]
 }
 
 variable "private_api_endpoint_only" {

modules/activity_tracker/variables.tf

@@ -187,4 +187,16 @@ variable "global_event_routing_settings" {
   })
   description = "Global settings for event routing"
   default     = null
+
+  # https://cloud.ibm.com/docs/atracker?topic=atracker-regions#regions-atracker
+  validation {
+    error_message = "Valid regions for permitted_target_regions are: [eu-gb eu-de au-syd us-east us-south eu-es]"
+    condition = (var.global_event_routing_settings == null ?
+      true :
+      alltrue([
+        for region in var.global_event_routing_settings.permitted_target_regions :
+        contains(["eu-gb", "eu-de", "au-syd", "us-east", "us-south", "eu-es"], region)
+      ])
+    )
+  }
 }