Description

Describes a lifecycle hook, which tells Auto Scaling that you want to perform an action when an instance launches or terminates. When you have a lifecycle hook in place, the Auto Scaling group will either:

Pause the instance after it launches, but before it is put into service

Pause the instance as it terminates, but before it is fully terminated

For more information, see Auto Scaling Lifecycle (http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/AutoScalingGroupLifecycle.html)

in the Auto Scaling User Guide.