A company is running a critical database on an EC2 instance. They want to ensure that if the underlying hardware fails, the instance is automatically recovered on new hardware with the same IP address, EBS volume attachments, and instance ID. What is the simplest way to achieve this?

Answer options:

A.

Put the instance in an Auto Scaling group with a minimum size of 1.

B.

Create an Amazon CloudWatch alarm for the StatusCheckFailed_System metric and add an EC2 Auto Recovery action.

C.

Use AWS Backup to restore the instance automatically upon failure.

D.

Enable Multi-AZ for the EC2 instance.

How to approach this question

Identify the feature that recovers an instance with its exact identity intact.

Full Answer

B.Create an Amazon CloudWatch alarm for the StatusCheckFailed_System metric and add an EC2 Auto Recovery action.✓ Correct

EC2 Auto Recovery (triggered by a CloudWatch alarm on StatusCheckFailed_System) reboots the instance on new underlying hardware while retaining its Instance ID, IP addresses, and EBS volume attachments.

Common mistakes

Choosing Auto Scaling, which replaces the instance entirely.

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