Which solution will meet this requirement In the MOST operationally efficient manner?

A SysOps administrator must create a solution that automatically shuts down any Amazon EC2 instances that have less than 10% average CPU utilization for 60 minutes or more.

Which solution will meet this requirement In the MOST operationally efficient manner?
A . Implement a cron job on each EC2 instance to run once every 60 minutes and calculate the current CPU utilization. Initiate an instance shutdown If CPU utilization is less than 10%.
B . Implement an Amazon CloudWatch alarm for each EC2 instance to monitor average CPU utilization. Set the period at 1 hour, and set the threshold at 10%. Configure an EC2 action on the alarm to stop the instance.
C . Install the unified Amazon CloudWatch agent on each EC2 instance, and enable the Basic level predefined metric set. Log CPU utilization every 60 minutes, and initiate an instance shutdown if CPU utilization is less than 10%.
D . Use AWS Systems Manager Run Command to get CPU utilization from each EC2 instance every 60 minutes. Initiate an instance shutdown if CPU utilization is less than 10%.

View Answer

Answer: B

Explanation:

To automatically shut down EC2 instances with low CPU utilization:

Create CloudWatch Alarms:

Go to the CloudWatch console and create an alarm for each EC2 instance.

Set the alarm to monitor the CPUUtilization metric with a period of 1 hour and a threshold of 10%.

Reference: Creating Amazon CloudWatch Alarms

Configure EC2 Action:

Configure the alarm to trigger an EC2 action that stops the instance when the alarm state is ALARM.

Reference: Stop EC2 Instances Using CloudWatch Alarms

This method is operationally efficient as it automates the monitoring and action without requiring manual intervention or additional infrastructure.