title: AWS AutoScaling, downscale - wait for processes termination
body: <p>I want to use AWS AutoScaling to scaledown a group of instances when SQS queue is short.
  These instances do some heavy work that sometimes requires 5-10 minutes to complete. And I want this work to be completed before the instance termination.</p>
  
  <p>I know a lot of people should have faced the same problem. Is it possible on EC2 to handle the AWS termination request and complete all my running processes before the instance is actually terminated? What is the best approach to this?</p>