Added var.maintenance_window and var.auto_upgrade_minor

Author: BSick7

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.14.0 (Jun 05, 2025)
+* Added `var.maintenance_window` to control system updates are applied.
+* Added `var.auto_upgrade_minor` to allow disabling of minor version upgrades.
+
 # 0.13.9 (May 29, 2025)
 * Added `db_hostname` and `db_port` outputs.
 

db.tf

@@ -10,7 +10,8 @@ resource "aws_db_instance" "this" {
   engine                      = "postgres"
   engine_version              = var.postgres_version
   allow_major_version_upgrade = true
-  auto_minor_version_upgrade  = true
+  auto_minor_version_upgrade  = var.auto_upgrade_minor
+  maintenance_window          = var.maintenance_window
   instance_class              = var.instance_class
   multi_az                    = var.high_availability
   allocated_storage           = var.allocated_storage

metrics.tf

@@ -40,9 +40,9 @@ locals {
 
       mappings = {
         memory_average = {
-          account_id  = local.account_id
-          expression  = "memory_average_bytes / 1048576" // Convert bytes to MB
-          dimensions  = local.dims
+          account_id = local.account_id
+          expression = "memory_average_bytes / 1048576" // Convert bytes to MB
+          dimensions = local.dims
         }
         memory_average_bytes = {
           account_id        = local.account_id

variables.tf

@@ -80,6 +80,27 @@ For a list of parameters, see https://docs.aws.amazon.com/AmazonRDS/latest/UserG
 EOF
 }
 
+variable "auto_upgrade_minor" {
+  type        = bool
+  default     = true
+  description = <<EOF
+Whether or not to automatically upgrade minor versions of the database.
+These upgrades are performed during the maintenance window (See `maintenance_window` variable).
+EOF
+}
+
+variable "maintenance_window" {
+  type        = string
+  default     = "Sat:03:00-Sat:03:30"
+  description = <<EOF
+A weekly time interval in which to performance maintenance (e.g. minor version upgrades, patches, etc.).
+This window is configured using UTC time zone.
+Syntax: "ddd:hh24:mi-ddd:hh24:mi"
+Example: "Mon:00:00-Mon:03:00"
+See [RDS Maintenance Window docs](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Maintenance.html#AdjustingTheMaintenanceWindow) for more information.
+EOF
+}
+
 locals {
   port = 5432
 }