Explanation:
The correct answer is D. To meet the requirement of sending an SNS notification when the number of application error messages exceeds a defined threshold within a 5-minute period, you should create a CloudWatch metric filter to detect the error pattern in the logs. Based on this custom metric, you can then create a CloudWatch alarm that is set to trigger when the defined threshold is exceeded. Finally, configure the alarm to send an SNS notification. This approach leverages built-in AWS monitoring and alerting capabilities without the need for code modifications or additional agents.
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How can a company set up a notification system for its web application hosted on Amazon EC2, using Amazon CloudWatch Logs and Amazon SNS, to alert when the error message count exceeds a specific threshold within 5 minutes?
A
Modify application code for direct SNS logging and configure an SNS topic for error threshold notifications.
B
Use CloudWatch Logs subscription filters to trigger SNS notifications upon exceeding the error threshold.
C
Deploy Amazon Inspector on EC2 instances for error monitoring and configure it for SNS notifications at the error threshold.
D
Create a CloudWatch metric filter for error pattern matching, establish an alarm, and set it to notify via SNS when the error count crosses the threshold.