title: How to autoscale Servers in ECS?
body: <p>I recently started using ECS. I was able to deploy a container image in ECR and create task definition for my container with CPU/Memory limits. My use case is that each container will be a long running app (no webserver, no port mapping needed). The containers will be spawned on demand 1 at a time and deleted on demand 1 at a time.</p>
  
  <p>I am able to create a cluster with N server instances. But I'd like to be able for the server instances to automatically scale up/down. For example if there isn't enough CPU/Memory in the cluster, I'd like a new instance to be created. </p>
  
  <p>And if there is an instance with no containers running in it, I'd like that specific instance to be scaled down / deleted. This is to avoid auto scale down termination of a server instance that has running tasks in it.</p>
  
  <p>What steps are needed to be able to achieve this?</p>