AWS::AutoScaling::LifecycleHook

• Before a new scaled instance is InService, there might be some steps beforewards or afterwards
• You can put an instance that is in the InService state into the Standby state, update some software or troubleshoot the instance, and then return the instance to service

• 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
• For example, you could install or configure software on newly launched instances, or download log files from an instance before it terminates.

Properties

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html

Type: AWS::AutoScaling::LifecycleHook
Properties:
  AutoScalingGroupName: String
  DefaultResult: String
  HeartbeatTimeout: Integer
  LifecycleHookName: String
  LifecycleTransition: String
  NotificationMetadata: String
  NotificationTargetARN: String
  RoleARN: String

LifecycleTransition

• EC2_INSTANCE_LAUNCHING
• EC2_INSTANCE_TERMINATING