fix: disable aurora pg db engine minor version upgrade automatically (#32)

Author: NithinKuruba

terraform/dev/main.tf

@@ -43,8 +43,6 @@ module "rds_db" {
   source = "../modules/rds"
 
   name            = "${var.name}-db"
-  engine          = "aurora-postgresql"
-  engine_version  = "15.12"
   vpc_id          = var.vpc_id
   subnet_ids      = var.subnet_ids
   max_capacity    = var.rds_max_capacity

terraform/modules/rds/main.tf

@@ -8,10 +8,10 @@ module "db" {
   version = "~> 10.0.2"
 
   name   = var.name
-  engine = var.engine
+  engine = "aurora-postgresql"
   # Cluster in v2 is provisioned with a serverless instance.
   engine_mode    = "provisioned"
-  engine_version = var.engine_version
+  engine_version = "15.15"
 
   vpc_id = var.vpc_id
   security_group_ingress_rules = {
@@ -39,8 +39,11 @@ module "db" {
     seconds_until_auto_pause = var.scale_down_time
   }
   cluster_instance_class = "db.serverless"
-  instances              = { one = {} }
-
+  instances = {
+    one = {
+      auto_minor_version_upgrade = false
+    }
+  }
   manage_master_user_password = false
   master_username             = var.db_username
   master_password_wo          = var.db_password

terraform/modules/rds/variables.tf

@@ -4,18 +4,6 @@ variable "name" {
   default     = "otp-db"
 }
 
-variable "engine" {
-  description = "RDS engine"
-  type        = string
-  default     = "aurora-postgresql"
-}
-
-variable "engine_version" {
-  description = "RDS engine version"
-  type        = string
-  default     = "15.12"
-}
-
 variable "vpc_id" {
   description = "VPC id"
   type        = string

terraform/prod/main.tf

@@ -43,8 +43,6 @@ module "rds_db" {
   source = "../modules/rds"
 
   name            = "${var.name}-db"
-  engine          = "aurora-postgresql"
-  engine_version  = "15.12"
   vpc_id          = var.vpc_id
   subnet_ids      = var.subnet_ids
   max_capacity    = var.rds_max_capacity

terraform/test/main.tf

@@ -43,8 +43,6 @@ module "rds_db" {
   source = "../modules/rds"
 
   name            = "${var.name}-db"
-  engine          = "aurora-postgresql"
-  engine_version  = "15.12"
   vpc_id          = var.vpc_id
   subnet_ids      = var.subnet_ids
   max_capacity    = var.rds_max_capacity