add placement_constraint_on_demand_only variable

README.md

@@ -28,7 +28,7 @@ END
         name = 'data'
         host_path = '/mnt/data'
     }
-}
+    placement_constraint_on_demand_only = true
 ```
 
 ## API
@@ -39,6 +39,7 @@ END
 * `container_definitions` - list of strings. Each string should be a JSON document describing a single container definition - see https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_definition_parameters.html.
 * `policy` - An IAM policy to control the task's access to AWS services - see http://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies.html
 * `volume` - Volume block map with 'name' and 'host_path'. See https://www.terraform.io/docs/providers/aws/r/ecs_task_definition.html#volume for more info.
+* `placement_constraint_on_demand_only` - Will restrict the taks to run only on on-demand container instances avoiding running on spot instances.
 
 ### Outputs
 

main.tf

@@ -11,13 +11,14 @@ locals {
 
 module "task_definition" {
   source                = "mergermarket/ecs-task-definition/acuris"
-  version               = "2.1.0"
+  version               = "2.2.0"
   family                = var.family
   container_definitions = var.container_definitions
   task_role_arn         = aws_iam_role.task_role.arn
   execution_role_arn    = aws_iam_role.ecs_tasks_execution_role.arn
   network_mode          = var.network_mode
   volume                = var.volume
+  placement_constraint_on_demand_only = var.placement_constraint_on_demand_only
 }
 
 resource "aws_iam_role_policy" "role_policy" {

variables.tf

@@ -45,4 +45,10 @@ variable "network_mode" {
   description = "The Docker networking mode to use for the containers in the task"
   type        = string
   default     = "bridge"
+}
+
+variable "placement_constraint_on_demand_only" {
+  description = "Add placement constraint to only run on on-demand instances"
+  type        = bool
+  default     = false
 }