Configuring EC2 Instances in Another Region for Disaster Recovery Purposes | AWS Exam Question Answer

Configuring EC2 Instances in Another Region for Disaster Recovery Purposes

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Question

You've been tasked with building out a duplicate environment in another region for disaster recovery purposes.

Part of your environment relies on EC2 instances with preconfigured software.

What steps would you take to configure the instances in another region? Choose the correct answer from the options below.

Answers

Explanations

Click on the arrows to vote for the correct answer

A. B. C. D.

Answer - B.

You can copy an Amazon Machine Image (AMI) within or across an AWS region using the AWS Management Console, the AWS command line tools or SDKs, or the Amazon EC2 API, all of which support the CopyImage action.

You can copy both Amazon EBS-backed AMIs and instance store-backed AMIs.

You can copy AMIs with encrypted snapshots and encrypted AMIs.

For more information on copying AMI's, please refer to the below link:

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/CopyingAMIs.html

To configure EC2 instances in another region for disaster recovery purposes, the recommended approach is to create an Amazon Machine Image (AMI) of the existing EC2 instances and then copy the AMI to the desired region. This will ensure that the preconfigured software and settings are replicated in the new region.

Option A, which suggests creating an AMI of the EC2 instance, is a good starting point, but it doesn't take into account the need to copy the AMI to the new region. So, option B is the correct answer.

Here are the steps you would need to take to configure the instances in another region:

  1. Create an AMI of the EC2 instance: You can create an AMI of the EC2 instance using the AWS Management Console, CLI, or SDK. This will create a snapshot of the instance's root volume, which includes the instance's operating system, preconfigured software, and settings.

  2. Copy the AMI to the desired region: Once you have created an AMI, you can copy it to the desired region using the "Copy AMI" feature in the AWS Management Console or the "aws ec2 copy-image" command in the AWS CLI. This will ensure that the AMI is available in the new region and can be used to launch new instances.

  3. Launch new instances from the AMI: Once the AMI has been copied to the new region, you can launch new instances from it using the AWS Management Console, CLI, or SDK. These instances will have the same preconfigured software and settings as the original instances, ensuring that the new environment is an exact duplicate of the original environment.

Option C, which suggests making the EC2 instance shareable among other regions through IAM permissions, is not a valid approach. IAM permissions only control access to AWS resources and services, and cannot be used to share EC2 instances between regions.

Therefore, the correct answer is B - create an AMI of the EC2 instance and copy the AMI to the desired region.

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