Elastic Compute Cloud
You have an EC2 Instance in a particular region. This EC2 Instance has a preconfigured software running on it. You have been requested to create a disaster recovery solution in case the instance in the region fails. Which of the following is the best solution?
A. Create a duplicate EC2 Instance in another AZ. Keep it in the shutdown state. Whenrequired, bring it back up.
B. Backup the EBS data volume. If the instance fails, bring up a new EC2 instance andattach the volume.
C. Store the EC2 data on S3. If the instance fails, bring up a new EC2 instance and restorethe data from S3.
D. Create an AMI of the EC2 Instance and copy it to another region.
D. Create an AMI of the EC2 Instance and copy it to another region.
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.
Copying a source AMI results in an identical but distinct target AMI with its own unique identifier. In the case of an Amazon EBS-backed AMI, each of its backing snapshots is, by default, copied to an identical but distinct target snapshot.
Option A is invalid, because it is a maintenance overhead to maintain another non-running instance.
Option B is invalid, because the preconfigured software could have settings on the root volume.
Option C is invalid, because this is a long and inefficient way to restore a failed instance.
For more information on Copying AMIs, please visit the below URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/CopyingAMIs.html
