From 1ec066bcc619f49cd8df447913cc4095d0c10134 Mon Sep 17 00:00:00 2001
From: Nathaniel Schweinberg <natanielks@gmail.com>
Date: Fri, 21 Apr 2017 15:09:52 -0700
Subject: [PATCH] enable web-service module to track latest ecs task revision

---
 web-service/main.tf | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/web-service/main.tf b/web-service/main.tf
index 95b43db5..76d4d45c 100644
--- a/web-service/main.tf
+++ b/web-service/main.tf
@@ -143,6 +143,9 @@ resource "aws_ecs_service" "main" {
   deployment_minimum_healthy_percent = "${var.deployment_minimum_healthy_percent}"
   deployment_maximum_percent         = "${var.deployment_maximum_percent}"
 
+  # Track the latest ACTIVE revision
+  task_definition = "${module.task.name}:${max("${module.task.revision}", "${data.aws_ecs_task_definition.task.revision}")}"
+
   load_balancer {
     elb_name       = "${module.elb.id}"
     container_name = "${module.task.name}"
@@ -154,6 +157,10 @@ resource "aws_ecs_service" "main" {
   }
 }
 
+data "aws_ecs_task_definition" "task" {
+  task_definition = "${module.task.name}"
+}
+
 module "task" {
   source = "../task"