How can the SysOps administrator receive notification only when both metrics exceed their threshold values?
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.
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. Configure each alarm to publish a notification to the SNS topic.
Create a metric alarm for the EBSByteBalance% metric 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.
Configure detailed monitoring for 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.
Explanations:
This option correctly outlines the process of installing the CloudWatch agent, creating separate metric alarms for disk space and DiskReadOps, and then combining them into a composite alarm. The composite alarm will trigger a notification to the SNS topic only when both conditions are met, which is the requirement.
While this option mentions the installation of the CloudWatch agent and creating separate alarms, it suggests configuring each alarm to publish notifications independently. This would result in notifications being sent when either alarm exceeds its threshold, not requiring both conditions to be true simultaneously.
This option incorrectly specifies the use of the EBSByteBalance% metric, which does not relate to monitoring disk space. The appropriate metric for disk space is not mentioned, making this option unsuitable for the requirement. Additionally, it does not include a composite alarm to ensure both conditions are met before sending a notification.
This option mentions configuring detailed monitoring, which is unnecessary since the CloudWatch agent is sufficient for the task. While it correctly suggests creating two alarms, it fails to mention the creation of a composite alarm. Thus, it does not ensure that notifications are sent only when both metrics exceed their thresholds.
It seems to me that the answer is:
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.