Set up an internal domain name for DP02 database

Add a private DNS name for the DP02 Cloud SQL instance to the VPC, so we don't have to hard-code IP addresses in configuration.

environment/deployments/science-platform/cloudsql/main.tf

@@ -73,6 +73,31 @@ moved {
   to = module.db_butler_registry_dp02[0]
 }
 
+resource "google_dns_managed_zone" "sql_private_zone" {
+  name        = "sql-private-zone"
+  dns_name    = "rsp-sql-${var.environment}.internal."
+  description = "DNS Zone containing domain names used to access internal databases."
+
+  visibility = "private"
+
+  private_visibility_config {
+    networks {
+      network_url = data.google_compute_network.network.id
+    }
+  }
+}
+
+resource "google_dns_record_set" "dp02" {
+  count  = var.butler_registry_dp02_enable ? 1 : 0
+
+  managed_zone = google_dns_managed_zone.sql_private_zone.name
+  name         = "dp02.${google_dns_managed_zone.sql_private_zone.dns_name}"
+  type         = "A"
+  rrdatas      = [module.db_butler_registry_dp02.private_ip_address]
+  ttl          = 1800
+}
+
+
 resource "random_password" "gafaelfawr" {
   length  = 24
   numeric = true

environment/deployments/science-platform/env/dev-cloudsql.tfvars

@@ -33,4 +33,4 @@ science_platform_db_maintenance_window_update_track = "canary"
 science_platform_backups_enabled                    = true
 
 # Increase this number to force Terraform to update the dev environment.
-# Serial: 20
+# Serial: 21

environment/deployments/science-platform/env/integration-cloudsql.tfvars

@@ -31,4 +31,4 @@ science_platform_db_maintenance_window_hour = 22
 science_platform_backups_enabled            = true
 
 # Increase this number to force Terraform to update the int environment.
-# Serial: 8
+# Serial: 9