I'm running custom transactional tasks on my EC2 instances. The decision to shutdown or not an instance is taken under many conditions by special process running on this instance. The termination should be done by instance itself, because Autoscaling Group does not know when data processing is finish. Do the following steps are consistent with the philosophy of AWS?
- Creates AMI with option: "Shutdown behaviour: Terminate".
- Autoscaling group creates a new instance with option "Protect From Scale In".
Custom process on EC2 calls command:
$ sudo shutdown -P now
to terminate an instance in proper time.
Is that correct? Or maybe AWS has some tools to do that, eg. emit special signal to terminate an instance?
Thank you