AWS Certified DevOps Engineer – Professional — Question 189

An ecommerce company uses a large number of Amazon EBS backed Amazon EC2 instances. To decrease manual work across all the instances, a DevOps
Engineer is tasked with automating restart actions when EC2 instance retirement events are scheduled.
How can this be accomplished?

Answer options

• A. Create a scheduled Amazon CloudWatch Events rule to execute an AWS Systems Manager automation document that checks if any EC2 instances are scheduled for retirement once a week. If the instance is scheduled for retirement, the automation document will hibernate the instance.
• B. Enable EC2 Auto Recovery on all of the instances. Create an AWS Config rule to limit the recovery to occur during a maintenance window only.
• C. Reboot all EC2 instances during an approved maintenance window that is outside of standard business hours. Set up Amazon CloudWatch alarms to send a notification in case any instance is failing EC2 instance status checks.
• D. Set up an AWS Health Amazon CloudWatch Events rule to execute AWS Systems Manager automation documents that stop and start the EC2 instance when a retirement scheduled event occurs.

Correct answer: D

Explanation

The correct answer is D because it directly addresses the need to automate actions in response to EC2 instance retirement events. Options A and B do not effectively automate the restart process in real-time, while option C merely involves a manual reboot during a maintenance window rather than responding dynamically to retirement events.