fix: add support to output existing cloud monitoring crn and guid on providing existing_cloud_monitoring_crn (#139)

* fix: add data source to get existing cloud monitoring
details

* fix: remove data source

* fix: update output

---------

Co-authored-by: Md Anam Raihan <[email protected]>

Author: iamar7

solutions/instances/main.tf

@@ -96,6 +96,11 @@ module "resource_group" {
 # Observability Instance
 #######################################################################################################################
 
+locals {
+  parsed_existing_cloud_monitoring_crn = var.existing_cloud_monitoring_crn != null ? split(":", var.existing_cloud_monitoring_crn) : []
+  existing_cloud_monitoring_guid       = length(local.parsed_existing_cloud_monitoring_crn) > 0 ? local.parsed_existing_cloud_monitoring_crn[7] : null
+}
+
 module "observability_instance" {
   source  = "terraform-ibm-modules/observability-instances/ibm"
   version = "2.13.2"

solutions/instances/outputs.tf

@@ -31,12 +31,12 @@ output "cloud_monitoring_name" {
 }
 
 output "cloud_monitoring_crn" {
-  value       = var.cloud_monitoring_provision ? module.observability_instance.cloud_monitoring_crn : null
+  value       = var.cloud_monitoring_provision ? module.observability_instance.cloud_monitoring_crn : (var.existing_cloud_monitoring_crn != null ? var.existing_cloud_monitoring_crn : null)
   description = "The id of the provisioned IBM cloud monitoring instance."
 }
 
 output "cloud_monitoring_guid" {
-  value       = var.cloud_monitoring_provision ? module.observability_instance.cloud_monitoring_guid : null
+  value       = var.cloud_monitoring_provision ? module.observability_instance.cloud_monitoring_guid : local.existing_cloud_monitoring_guid
   description = "The guid of the provisioned IBM cloud monitoring instance."
 }