RDS storage autoscaling is enabled for several DB instances. The DevOps team wants to show autoscaling events on a CloudWatch dashboard. Which approach will produce a CloudWatch metric they can graph for autoscaling events?
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Correct answer: Create an EventBridge rule that matches RDS storage autoscaling events, invoke a Lambda that publishes a custom CloudWatch metric, and display that custom metric on the CloudWatch dashboard..
Why this is the answer
The correct approach leverages EventBridge to capture specific RDS storage autoscaling events. EventBridge can filter these events and trigger a Lambda function. The Lambda function then publishes a custom metric to CloudWatch, which can be easily visualized on a dashboard. Incorrect options: CloudTrail management events capture API calls, but directly creating a metric filter on CloudTrail logs for autoscaling events is less direct and efficient than using EventBridge, which is designed for event-driven architectures. Toggling a CloudWatch alarm state would show the alarm's status, not a quantifiable metric of autoscaling events, making it unsuitable for graphing event occurrences. CloudTrail data events capture data plane operations within services, not management plane actions like storage autoscaling, making this option irrelevant.
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