feat: Allow to override parameters (#8)

* feat: Allow to override parameters

* terraform-docs: automated action

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

examples/postgres/main.tf

@@ -36,6 +36,12 @@ module "db" {
   db_name    = "example"
   db_user    = "api"
 
+  parameters = {
+    "rds.force_ssl" = "1"
+  }
+  parameter_group_family = "postgres16"
+  engine_version         = "16.1"
+
   # for easy testing:
   deletion_protection = false
   apply_immediately   = true

modules/postgres/README.md

@@ -40,14 +40,15 @@
 | <a name="input_db_name"></a> [db\_name](#input\_db\_name) | Database name. | `string` | n/a | yes |
 | <a name="input_db_user"></a> [db\_user](#input\_db\_user) | Database user. | `string` | n/a | yes |
 | <a name="input_deletion_protection"></a> [deletion\_protection](#input\_deletion\_protection) | Deletion protection | `bool` | `true` | no |
-| <a name="input_engine_version"></a> [engine\_version](#input\_engine\_version) | Postgres version. | `string` | `"14.5"` | no |
+| <a name="input_engine_version"></a> [engine\_version](#input\_engine\_version) | Postgres version. | `string` | n/a | yes |
 | <a name="input_identifier"></a> [identifier](#input\_identifier) | RDS identifier. | `string` | n/a | yes |
 | <a name="input_instance_class"></a> [instance\_class](#input\_instance\_class) | Instance class. | `string` | `"db.t4g.micro"` | no |
 | <a name="input_logs_retention_in_days"></a> [logs\_retention\_in\_days](#input\_logs\_retention\_in\_days) | Postgres and upgrade logs retention counted in days. | `number` | `60` | no |
 | <a name="input_maintenance_window"></a> [maintenance\_window](#input\_maintenance\_window) | Maintenance window | `string` | `"Mon:00:00-Mon:02:00"` | no |
 | <a name="input_max_allocated_storage"></a> [max\_allocated\_storage](#input\_max\_allocated\_storage) | Max allocated storage size (GiB) | `number` | `100` | no |
 | <a name="input_multi_az"></a> [multi\_az](#input\_multi\_az) | Enable multi AZ | `bool` | `true` | no |
-| <a name="input_parameter_group_family"></a> [parameter\_group\_family](#input\_parameter\_group\_family) | Parameter group family. | `string` | `"postgres14"` | no |
+| <a name="input_parameter_group_family"></a> [parameter\_group\_family](#input\_parameter\_group\_family) | Parameter group family. | `string` | n/a | yes |
+| <a name="input_parameters"></a> [parameters](#input\_parameters) | Configuration for parameters group | `map(string)` | `{}` | no |
 | <a name="input_password_length"></a> [password\_length](#input\_password\_length) | Password length for random generator. | `number` | `16` | no |
 | <a name="input_performance_insights"></a> [performance\_insights](#input\_performance\_insights) | Performance insights configuration. Retention period valid values are 7, 731 (2 years) or a multiple of 31. | <pre>object({<br>    retention_period = number<br>    kms_key_id       = string<br>  })</pre> | <pre>{<br>  "kms_key_id": null,<br>  "retention_period": 62<br>}</pre> | no |
 | <a name="input_port"></a> [port](#input\_port) | Database port | `number` | `5432` | no |

modules/postgres/main.tf

@@ -40,6 +40,15 @@ resource "aws_db_parameter_group" "this" {
     value = "utf8"
   }
 
+  dynamic "parameter" {
+    for_each = var.parameters
+
+    content {
+      name  = parameter.key
+      value = parameter.value
+    }
+  }
+
   lifecycle {
     create_before_destroy = true
   }

modules/postgres/variables.tf

@@ -86,16 +86,12 @@ variable "deletion_protection" {
 
 variable "parameter_group_family" {
   description = "Parameter group family."
-
-  type    = string
-  default = "postgres14"
+  type        = string
 }
 
 variable "engine_version" {
   description = "Postgres version."
-
-  type    = string
-  default = "14.5"
+  type        = string
 }
 
 variable "allocated_storage" {
@@ -158,3 +154,9 @@ variable "snapshot_identifier" {
   type        = string
   default     = null
 }
+
+variable "parameters" {
+  type        = map(string)
+  description = "Configuration for parameters group"
+  default     = {}
+}