chore: Update example-rds-instance and rds-aurora modules

- Updated example-rds-instance.tf to include a new vpc_security_group_ids parameter.
- Updated example-rds-instance.tf to set the db_instance_class to "db.t4g.small".
- Updated example-rds-instance.tf to remove the deprecated vpc_security_group_ids parameter.
- Updated MODULE.md to reflect the new default value for db_instance_class.
- Updated variables.tf to change the default value of db_instance_class to "db.t4g.small".
- Updated outputs.tf to include a new vpc_cidr_block output.

Author: ulises-jeremias

live/common-infra/example-rds-instance.tf

@@ -17,17 +17,18 @@ module "exampledb" {
 
   vpc_id          = data.aws_ssm_parameter.vpc_id.value
   db_subnet_group = data.aws_ssm_parameter.database_subnet_group.value
+  vpc_security_group_ids = [module.security_group.security_group_id]
 
   db_name            = var.example_db_name
   db_master_username = var.example_db_master_username
   db_port            = 5432
 
+  db_instance_class = "db.t4g.small"
+
   allocated_storage = 20
 
   manage_master_user_password = true
 
-  vpc_security_group_ids = [module.security_group.this_security_group_id]
-
   tags = merge(
     module.label.tags,
     {
@@ -46,8 +47,8 @@ module "security_group" {
 
   ingress_with_cidr_blocks = [
     {
-      from_port   = module.exampledb.db_instance_port
-      to_port     = module.exampledb.db_instance_port
+      from_port   = 5432
+      to_port     = 5432
       protocol    = "tcp"
       description = "RDS DB Instance access from within VPC"
       cidr_blocks = data.aws_vpc.main.cidr_block

modules/rds/docs/MODULE.md

@@ -37,7 +37,7 @@
 | <a name="input_db_engine"></a> [db\_engine](#input\_db\_engine) | The name of the database engine to be used for RDS. | `string` | `"postgres"` | no |
 | <a name="input_db_engine_version"></a> [db\_engine\_version](#input\_db\_engine\_version) | The database engine version. | `string` | `"16.3"` | no |
 | <a name="input_db_family"></a> [db\_family](#input\_db\_family) | The family of the database engine to be used for RDS. | `string` | `"postgres16"` | no |
-| <a name="input_db_instance_class"></a> [db\_instance\_class](#input\_db\_instance\_class) | The instance class to use for RDS. | `string` | `"db.t4g.large"` | no |
+| <a name="input_db_instance_class"></a> [db\_instance\_class](#input\_db\_instance\_class) | The instance class to use for RDS. | `string` | `"db.t4g.small"` | no |
 | <a name="input_db_maintenance_window"></a> [db\_maintenance\_window](#input\_db\_maintenance\_window) | Preferred maintenance window. | `string` | `"Mon:00:00-Mon:03:00"` | no |
 | <a name="input_db_major_engine_version"></a> [db\_major\_engine\_version](#input\_db\_major\_engine\_version) | The major engine version. | `string` | `"16"` | no |
 | <a name="input_db_master_password"></a> [db\_master\_password](#input\_db\_master\_password) | Password for the master DB user. Note that this may show up in logs, and it will be stored in the state file. Required unless `manage_master_user_password` is set to `true` or unless `snapshot_identifier` or `replication_source_identifier` is provided or unless a `global_cluster_identifier` is provided when the cluster is the secondary cluster of a global database | `string` | `null` | no |
@@ -82,4 +82,4 @@
 | <a name="output_db_subnet_group_arn"></a> [db\_subnet\_group\_arn](#output\_db\_subnet\_group\_arn) | The ARN of the db subnet group |
 | <a name="output_db_subnet_group_id"></a> [db\_subnet\_group\_id](#output\_db\_subnet\_group\_id) | The db subnet group name |
 | <a name="output_enhanced_monitoring_iam_role_arn"></a> [enhanced\_monitoring\_iam\_role\_arn](#output\_enhanced\_monitoring\_iam\_role\_arn) | The Amazon Resource Name (ARN) specifying the monitoring role |
-<!-- END_TF_DOCS -->
+<!-- END_TF_DOCS -->

modules/rds/variables.tf

@@ -54,7 +54,7 @@ variable "db_port" {
 variable "db_instance_class" {
   description = "The instance class to use for RDS."
   type        = string
-  default     = "db.t4g.large"
+  default     = "db.t4g.small"
 }
 
 variable "db_engine" {

modules/vpc/outputs.tf

@@ -3,6 +3,11 @@ output "vpc_id" {
   value       = module.vpc.vpc_id
 }
 
+output "vpc_cidr_block" {
+  description = "value of the vpc_cidr_block output from the vpc module"
+  value       = module.vpc.vpc_cidr_block
+}
+
 output "public_subnets" {
   description = "value of the public_subnets output from the vpc module"
   value       = module.vpc.public_subnets