Auto Scaling lifecycle hooks

• Lifecycle hooks enable you to perform custom actions by pausing instances as an Auto Scaling group launches or terminates them.

• When an instance is paused, it remains in a wait state either until you complete the lifecycle action using the complete-lifecycle-action command or the CompleteLifecycleAction operation, or until the timeout period ends (one hour by default).

• You can store and view the metrics that you collect with the CloudWatch agent in CloudWatch just as you can with any other CloudWatch metrics.