Add spot_allocation_strategy variable with default price-capacity-opt…

_variables.tf

@@ -34,6 +34,12 @@ variable "on_demand_base_capacity" {
   default     = 0
 }
 
+variable "spot_allocation_strategy" {
+  type        = string
+  default     = "price-capacity-optimized"
+  description = "How to allocate capacity across the Spot pools. Valid values: lowest-price, diversified, capacity-optimized, price-capacity-optimized."
+}
+
 variable "vpc_id" {
   description = "VPC ID to deploy the ECS cluster."
 }

asg.tf

@@ -18,7 +18,7 @@ resource "aws_autoscaling_group" "ecs" {
     }
 
     instances_distribution {
-      spot_instance_pools                      = 3
+      spot_allocation_strategy                 = var.spot_allocation_strategy
       on_demand_base_capacity                  = var.on_demand_base_capacity
       on_demand_percentage_above_base_capacity = var.on_demand_percentage
     }