Added possibility to control creation of elasticache and redshift subnet groups

Author: antonbabenko

README.md

@@ -186,7 +186,9 @@ Terraform version 0.10.3 or newer is required for this module to work.
 | create\_database\_internet\_gateway\_route | Controls if an internet gateway route for public database access should be created | string | `false` | no |
 | create\_database\_subnet\_group | Controls if database subnet group should be created | string | `true` | no |
 | create\_database\_subnet\_route\_table | Controls if separate route table for database should be created | string | `false` | no |
+| create\_elasticache\_subnet\_group | Controls if elasticache subnet group should be created | string | `true` | no |
 | create\_elasticache\_subnet\_route\_table | Controls if separate route table for elasticache should be created | string | `false` | no |
+| create\_redshift\_subnet\_group | Controls if redshift subnet group should be created | string | `true` | no |
 | create\_redshift\_subnet\_route\_table | Controls if separate route table for redshift should be created | string | `false` | no |
 | create\_vpc | Controls if VPC should be created (it affects almost all resources) | string | `true` | no |
 | database\_route\_table\_tags | Additional tags for the database route tables | map | `{}` | no |
@@ -255,7 +257,7 @@ Terraform version 0.10.3 or newer is required for this module to work.
 
 | Name | Description |
 |------|-------------|
-| azs | A list of availability zones spefified as argument to this module |
+| azs | A list of availability zones specified as argument to this module |
 | database\_route\_table\_ids | List of IDs of database route tables |
 | database\_subnet\_group | ID of database subnet group |
 | database\_subnets | List of IDs of database subnets |

main.tf

@@ -230,7 +230,7 @@ resource "aws_subnet" "redshift" {
 }
 
 resource "aws_redshift_subnet_group" "redshift" {
-  count = "${var.create_vpc && length(var.redshift_subnets) > 0 ? 1 : 0}"
+  count = "${var.create_vpc && length(var.redshift_subnets) > 0 && var.create_redshift_subnet_group ? 1 : 0}"
 
   name        = "${lower(var.name)}"
   description = "Redshift subnet group for ${var.name}"
@@ -253,7 +253,7 @@ resource "aws_subnet" "elasticache" {
 }
 
 resource "aws_elasticache_subnet_group" "elasticache" {
-  count = "${var.create_vpc && length(var.elasticache_subnets) > 0 ? 1 : 0}"
+  count = "${var.create_vpc && length(var.elasticache_subnets) > 0 && var.create_elasticache_subnet_group ? 1 : 0}"
 
   name        = "${var.name}"
   description = "ElastiCache subnet group for ${var.name}"

outputs.tf

@@ -279,6 +279,6 @@ output "default_vpc_main_route_table_id" {
 //}
 
 output "azs" {
-  description = "A list of availability zones spefified as argument to this module"
+  description = "A list of availability zones specified as argument to this module"
   value       = "${var.azs}"
 }

variables.tf

@@ -81,6 +81,12 @@ variable "elasticache_subnets" {
   default     = []
 }
 
+variable "intra_subnets" {
+  type        = "list"
+  description = "A list of intra subnets"
+  default     = []
+}
+
 variable "create_database_subnet_route_table" {
   description = "Controls if separate route table for database should be created"
   default     = false
@@ -96,17 +102,21 @@ variable "create_elasticache_subnet_route_table" {
   default     = false
 }
 
-variable "intra_subnets" {
-  type        = "list"
-  description = "A list of intra subnets"
-  default     = []
-}
-
 variable "create_database_subnet_group" {
   description = "Controls if database subnet group should be created"
   default     = true
 }
 
+variable "create_elasticache_subnet_group" {
+  description = "Controls if elasticache subnet group should be created"
+  default     = true
+}
+
+variable "create_redshift_subnet_group" {
+  description = "Controls if redshift subnet group should be created"
+  default     = true
+}
+
 variable "create_database_internet_gateway_route" {
   description = "Controls if an internet gateway route for public database access should be created"
   default     = false