Add possibility to specify subnet ids

Author: Eugene Dementiev

main.tf

@@ -40,7 +40,7 @@ resource "aws_autoscaling_group" "ASG" {
     version = "$Latest"
   }
 
-  vpc_zone_identifier  = data.aws_subnet_ids.subnets.ids
+  vpc_zone_identifier  = coalescelist(var.subnet_ids, list(data.aws_subnet_ids.subnets.ids))
   termination_policies = ["OldestInstance"]
 
   tag {

variables.tf

@@ -38,6 +38,12 @@ variable "security_groups" {
   default     = []
 }
 
+variable "subnet_ids" {
+  description = "list of subnet ids. By default takes all subnets from the VPC"
+  type        = "list"
+  default     = []
+}
+
 variable "spot" {
   description = "Whether or not use Spot instances. Warning: most likely not suitable for production!"
   default     = false