title: Reuse EBS volumes when auto scaling group launches new instance
body: <p>I have cloud formation template that creates two EBS volumes and I am attaching those volumes to instance using aws ec2 attach-volumes from user data, also I have auto scaling group setup, so when I update stack with different instance type and it launches new instance, volumes are not attached.</p>
  
  <p>I checked logs and it says volumes are not available, I know why because the terminated instance is using those volumes when ASG launches new one, is there any way that I could reuse those volumes.</p>