Add storage_encrypted argument (#5)

Author: drmikecrowe

README.md

@@ -28,6 +28,7 @@ The module will create:
 - `storage_type` - One of `standard` (magnetic), `gp2` (general purpose SSD), or `io1` (provisioned IOPS SSD). Default `standard` (magnetic)
 - `iops` - The amount of provisioned IOPS. Setting this implies a storage_type of `io1`. Default is `0` if rds storage type is not `io1`
 - `allocated_storage` - The number of GBs to allocate for DB storage. Must be an integer, _e.g._ `10`
+- `storage_encrypted` - (Optional) Specifies whether the DB instance is encrypted. The default is false if not specified.
 - `engine` - Engine type, such as `mysql` or `postgres`
 - `engine_version` - DB Engine version, _e.g._ `9.5.4` for `Postgres`
 - `instance_class` - Instance class, _e.g._ `db.t2.micro`
@@ -79,6 +80,7 @@ module "rds_instance" {
       multi_az                    = true
       storage_type                = "gp2"
       allocated_storage           = "100"
+      storage_encrypted           = true
       engine                      = "mysql"
       engine_version              = "5.7.17"
       instance_class              = "db.t2.medium"

main.tf

@@ -28,6 +28,7 @@ resource "aws_db_instance" "default" {
   engine_version              = "${var.engine_version}"
   instance_class              = "${var.instance_class}"
   allocated_storage           = "${var.allocated_storage}"
+  storage_encrypted           = "${var.storage_encrypted}"
   vpc_security_group_ids      = ["${aws_security_group.default.id}"]
   db_subnet_group_name        = "${aws_db_subnet_group.default.name}"
   parameter_group_name        = "${aws_db_parameter_group.default.name}"

tests/rds_instance.tf

@@ -13,6 +13,7 @@ module "rds_instance" {
   multi_az                    = true
   storage_type                = "gp2"
   allocated_storage           = "100"
+  storage_encrypted           = false
   engine                      = "mysql"
   engine_version              = "5.7.17"
   instance_class              = "db.t2.medium"

variables.tf

@@ -38,6 +38,11 @@ variable "storage_type" {
   default     = "standard"
 }
 
+variable "storage_encrypted" {
+  description = "(Optional) Specifies whether the DB instance is encrypted. The default is false if not specified."  
+  default     = false
+}
+
 variable "iops" {
   description = "The amount of provisioned IOPS. Setting this implies a storage_type of 'io1'. Default is 0 if rds storage type is not 'io1'"
   default     = "0"