What would allow for automatic recovery of the EC2 instance as quickly as possible?

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In: SAA-C02
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A monolithic application was recently migrated to AWS and is now running on a single Amazon EC2 instance.Due to application limitations, it is not possible to use automatic scaling to scale out the application.The chief technology officer (CTO) wants an automated solution to restore the EC2 instance in the unlikely event the underlying hardware fails.

What would allow for automatic recovery of the EC2 instance as quickly as possible?

Configure an Amazon CloudWatch alarm that triggers the recovery of the EC2 instance if it becomes impaired.

Configure an Amazon CloudWatch alarm to trigger an SNS message that alerts the CTO when the EC2 instance is impaired.

Configure AWS CloudTrail to monitor the health of the EC2 instance, and if it becomes impaired, trigger instance recovery.

Configure an Amazon EventBridge event to trigger an AWS Lambda function once an hour that checks the health of the EC2 instance and triggers instance recovery if the EC2 instance is unhealthy.

Explanations:

Configuring an Amazon CloudWatch alarm to trigger automatic recovery of the EC2 instance allows for immediate action when the instance is impaired, ensuring the fastest recovery.

While alerting the CTO via SNS can inform of issues, it does not provide an automated recovery solution for the EC2 instance.

AWS CloudTrail is used for auditing and logging, not for monitoring health or triggering recovery actions directly.

While this option involves checking health, it relies on a scheduled Lambda function that may introduce delays, making it slower than immediate recovery methods.

2025-09-28

1 Comment

  1. Kelly
    Author

    If I’m not mistaken, the answer is:
    Configure an Amazon CloudWatch alarm that triggers the recovery of the EC2 instance if it becomes impaired.

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