What should the administrator do to receive email alerts before low storage space affects EC2 instance performance?
Use built-in Amazon CloudWatch metrics, and configure CloudWatch alarms and an Amazon SNS topic for email notifications.
Use AWS CloudTrail logs and configure the trail to send notifications to an Amazon SNS topic.
Use the Amazon CloudWatch agent to send disk space metrics, then set up CloudWatch alarms using an Amazon SNS topic.
Use AWS Trusted Advisor and enable email notification alerts for EC2 disk space.
Explanations:
CloudWatch provides basic EBS volume metrics but does not natively include disk space on the file system of Windows instances.
CloudTrail logs track API activity but do not monitor disk space or provide metrics for EC2 instance storage.
The CloudWatch agent can be configured to collect custom metrics, including disk space usage on Windows instances. CloudWatch alarms can then trigger notifications via SNS.
Trusted Advisor does not monitor disk space specifically for EC2 instances; it focuses on best practices and overall resource optimization.
I rate that the answer is:
Use the Amazon CloudWatch agent to send disk space metrics, then set up CloudWatch alarms using an Amazon SNS topic.