FEAT: Enable defining order_placement_strategy and task_placement_strategies

Author: Sumit Sarkar

main.tf

@@ -18,10 +18,8 @@ resource "aws_ecs_service" "main" {
   deployment_minimum_healthy_percent = "${var.deployment_min_healthy_percent}"
   deployment_maximum_percent         = "${var.deployment_max_percent}"
 
-  ordered_placement_strategy = {
-    type = "spread"
-    field = "instanceId"
-  }
+  ordered_placement_strategy = ["${var.ordered_placement_strategies}"]
+  placement_constraints = ["${var.placement_constraints}"]
 
   load_balancer {
     target_group_arn = "${aws_alb_target_group.main.id}"

variables.tf

@@ -105,3 +105,17 @@ variable "scale_down_cooldown_seconds" {
   default     = 60
   description = "Number of seconds after the alarm that the scale DOWN should happen."
 }
+
+variable "ordered_placement_strategies" {
+  type = "list"
+  default = [{
+    type = "spread"
+  }]
+}
+
+variable "placement_constraints" {
+  type = "list"
+  default = [{
+    type = "distinctInstance"
+  }]
+}