SOA-C02 Question 6
Single answerA company has an application running on EC2 instances in an Auto Scaling group. The application processes orders and stores logs in Amazon S3. The SysOps administrator is tasked with ensuring that any sudden increase in failed order processing is promptly detected. Which solution will accomplish this?
- A
Create a custom CloudWatch metric for failed orders, publish data to this metric, and configure a CloudWatch alarm to notify when the metric exceeds a defined threshold.
- B
Enable AWS CloudTrail to monitor API calls and configure a CloudWatch alarm to notify on failed order events.
- C
Use Amazon S3 Event Notifications to trigger a CloudWatch alarm when new failed order logs are written to the S3 bucket.
- D
Configure the Auto Scaling group to scale out based on CPU utilization metrics and monitor the instance health checks.
Show answer and explanation
Correct answer: A
Explanation
The task requires detecting and alerting on sudden increases in failed order processing. The best approach is to create a custom CloudWatch metric for failed orders and configure an alarm on that metric. This ensures that the application-specific failure is monitored effectively and alerts are generated as needed.
- A. Correct.
This is the correct solution. By creating a custom CloudWatch metric for failed orders and publishing data to it, you can monitor the metric and configure an alarm to notify whenever the failed orders exceed a threshold. This approach directly targets the requirement of monitoring failed orders.
- B. Incorrect.
CloudTrail is used to monitor API activity, but it is not designed to monitor application-specific events such as failed orders. This option does not solve the problem effectively.
- C. Incorrect.
Amazon S3 Event Notifications can be used to initiate actions when objects are created in the bucket, but it cannot directly trigger a CloudWatch alarm or monitor failed orders. This is not an appropriate solution for the given requirement.
- D. Incorrect.
Scaling the Auto Scaling group based on CPU utilization and monitoring instance health checks does not address the specific need to detect failed order processing. This is unrelated to the problem.