feat: parameterize engine_version (#16)

Author: mars64

main.tf

@@ -52,6 +52,7 @@ module "controllers" {
   boundary_release = var.boundary_release
   bucket_name      = aws_s3_bucket.boundary.id
   desired_capacity = var.controller_desired_capacity
+  engine_version   = var.engine_version
   image_id         = local.image_id
   instance_type    = var.controller_instance_type
   key_name         = var.key_name

modules/controller/main.tf

@@ -165,7 +165,7 @@ module "postgresql" {
   backup_retention_period = 0
   backup_window           = "03:00-06:00"
   engine                  = "postgres"
-  engine_version          = "12.4"
+  engine_version          = var.engine_version
   family                  = "postgres12"
   identifier              = "boundary"
   instance_class          = "db.t2.micro"

modules/controller/variables.tf

@@ -56,13 +56,19 @@ variable "min_size" {
   type        = number
 }
 
+variable "engine_version" {
+  default     = "12.10"
+  description = "The engine_version of the postgres db, within the postgres12 family"
+  type        = string
+}
+
 variable "private_subnets" {
-  description = "List of private subnets"
+  description = "List of private subnet ids"
   type        = list(string)
 }
 
 variable "public_subnets" {
-  description = "List of public subnets"
+  description = "List of public subnet ids"
   type        = list(string)
 }
 

variables.tf

@@ -34,6 +34,12 @@ variable "controller_min_size" {
   type        = number
 }
 
+variable "engine_version" {
+  default     = "12.10"
+  description = "The engine_version of the postgres db, within the postgres12 family"
+  type        = string
+}
+
 variable "key_name" {
   default     = ""
   description = "The name of the key pair"