title: What is an ECS Task Group and how do I create one?
body: <p>This is the only <a href="https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-placement-constraints.html" rel="noreferrer">doc</a> i have found for Task Group and it doesn't explain how or where to create one.</p>
  
  <p>I can't find any docs that adequately explain what a Task Group actually is with an example of how to create and use one. It sound like its a way for a service to run multiple different Task Definitions which would be useful to me.</p>
  
  <p>For example, I added a container to a task definition and the service is balancing multiple instances of it on the cluster. But I have another container I want to deploy along with the first one, but I only want a single instance of it to run. So I can't add it to the same task definition because I'd be creating multiple instances of it and consuming unnecessary resources. Seems like this is what Task Groups are for.</p>