Exam AWS Certified SysOps Administrator - Associate topic 1 question 226 discussion

To receive a notification only when both metrics exceed their threshold values, the SysOps administrator should follow these steps: Install the Amazon CloudWatch agent on the EC2 instances. Configure detailed monitoring for the EC2 instances. Create a metric alarm for the DiskReadOps metric and set a threshold value for it. Create a metric alarm for the free disk space and set a threshold value for it. Create a composite alarm that includes the two metric alarms, and set a threshold value for it. Configure the composite alarm to publish a notification to the SNS topic when it is triggered. Therefore, option A is the correct answer.

A. Install the Amazon CloudWatch agent on the EC2 instances. Create a metric alarm for the disk space and a metric alarm for the DiskReadOps metric. Create a composite alarm that includes the two metric alarms to publish a notification to the SNS topic. Here's why: Install the Amazon CloudWatch agent: The CloudWatch agent collects detailed metrics such as disk space utilization from the EC2 instances. Create individual metric alarms: Create one alarm for the disk space metric and another for the DiskReadOps metric. Create a composite alarm: Combine the two individual metric alarms into a composite alarm. The composite alarm will trigger only when both of the individual alarms are in the ALARM state. Publish to SNS topic: Configure the composite alarm to publish a notification to the SNS topic when it goes into the ALARM state. This approach ensures that you receive notifications only when both specified metrics exceed their respective threshold values, aligning with your requirement.

English is hard. EBS volume exceed + DiskReadOps exceed = composite alarm

A is the right answer

A is the right answer https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Create_Composite_Alarm.html

This should be A. You have to install cloudwatch agent as you don't have disk usage metrics by default. Ref https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Create_Composite_Alarm.html

As far as reading the documentation, I believe A is the right answer. D seems close but I don't understand what's the meaning of detailed monitoring vs. what answer A offers.