fix: add dns_name to output in postgresql module (#544)

Co-authored-by: Awais Malik <awmalik@google.com>

examples/postgresql-psc/README.md

@@ -30,6 +30,7 @@ terraform destroy
 
 | Name | Description |
 |------|-------------|
+| dns\_name | n/a |
 | name | The name for Cloud SQL instance |
 | project\_id | n/a |
 

examples/postgresql-psc/outputs.tf

@@ -22,3 +22,7 @@ output "name" {
   description = "The name for Cloud SQL instance"
   value       = module.pg.instance_name
 }
+
+output "dns_name" {
+  value = module.pg.dns_name
+}

modules/postgresql/README.md

@@ -67,6 +67,7 @@ Note: CloudSQL provides [disk autoresize](https://cloud.google.com/sql/docs/mysq
 | Name | Description |
 |------|-------------|
 | additional\_users | List of maps of additional users and passwords |
+| dns\_name | DNS name of the instance endpoint |
 | generated\_user\_password | The auto generated default user password if not input password was provided |
 | iam\_users | The list of the IAM users with access to the CloudSQL instance |
 | instance\_connection\_name | The connection name of the master instance to be used in connection strings |

modules/postgresql/outputs.tf

@@ -136,3 +136,8 @@ output "instances" {
   description = "A list of all `google_sql_database_instance` resources we've created"
   sensitive   = true
 }
+
+output "dns_name" {
+  value       = google_sql_database_instance.default.dns_name
+  description = "DNS name of the instance endpoint"
+}