Which solution will meet this requirement?
Create an Amazon Simple Notification Service (Amazon SNS) topic for the CloudWatch alarm. Subscribe the ticketing tool’s endpoint to the SNS topic.
Create an Amazon Simple Queue Service (Amazon SQS) queue as the target for the CloudWatch alarm. Configure the queue to transform messages into tickets and to post the tickets to the ticketing tool’s endpoint.
Create an AWS Lambda function. Configure the CloudWatch alarm to directly invoke the Lambda function to create individual tickets in the ticketing tool.
Create an Amazon EventBridge rule that monitors the VPN tunnel directly. Configure the ticketing tool’s endpoint as the target of the rule.
Explanations:
Amazon SNS can be integrated with CloudWatch alarms to trigger notifications. Subscribing the ticketing tool’s endpoint to the SNS topic allows immediate ticket creation when the VPN tunnel goes down. This solution meets the requirement efficiently.
Amazon SQS does not automatically integrate with CloudWatch alarms, and configuring SQS to transform messages into tickets would require additional processing logic not inherently supported by SQS alone.
While a Lambda function can be configured to create tickets, CloudWatch alarms cannot directly invoke Lambda functions. Instead, CloudWatch requires SNS as an intermediary to trigger Lambda.
EventBridge rules can monitor certain events directly, but they do not natively track VPN tunnel status. CloudWatch alarms are the appropriate tool for VPN tunnel status monitoring.
If I had to guess, I’d say the answer is:
Create an Amazon Simple Notification Service (Amazon SNS) topic for the CloudWatch alarm. Subscribe the ticketing tool’s endpoint to the SNS topic.