NRL-1664 Add terraform variable to disable all firehose lambda subscriptions

Author: axelkrastek1-nhs

terraform/infrastructure/etc/perftest.tfvars

@@ -1,8 +1,9 @@
 account_name     = "perftest"
 aws_account_name = "test"
 
-domain               = "perftest.record-locator.national.nhs.uk"
-public_domain        = "perftest.api.service.nhs.uk"
-deletion_protection  = true
-log_retention_period = 30
-enable_reporting     = false
+domain                                = "perftest.record-locator.national.nhs.uk"
+public_domain                         = "perftest.api.service.nhs.uk"
+deletion_protection                   = true
+log_retention_period                  = 30
+enable_reporting                      = false
+disable_firehose_lambda_subscriptions = true

terraform/infrastructure/locals.tf

@@ -32,7 +32,7 @@ locals {
 
   reporting_bucket_arn = data.aws_s3_bucket.source-data-bucket.arn
   reporting_kms_arn    = data.aws_kms_key.glue.arn
-  firehose_lambda_subscriptions = var.use_shared_resources ? (
+  firehose_lambda_subscriptions = var.use_shared_resources && !var.disable_firehose_lambda_subscriptions ? (
     var.enable_reporting ? {
       "splunk_subscription"  = module.firehose__processor[0].firehose_subscription,
       "reports_subscription" = module.firehose__processor[0].firehose_reporting_subscription

terraform/infrastructure/vars.tf

@@ -61,3 +61,9 @@ variable "enable_reporting" {
   description = "Enable reporting for this environment"
   default     = false
 }
+
+variable "disable_firehose_lambda_subscriptions" {
+  description = "Disable firehose lambda subscriptions (e.g: splunk, reporting) for shared environments (e.g: perftest). This doesn't affect ephemeral environments as the firehose subscriptions are disabled regardless of this setting"
+  type        = bool
+  default     = false
+}