Table of Contents
Question
A company asks a SysOps administrator to provision an additional environment for an application in four additional AWS Regions. The application is running on more than 100 Amazon C2 instances in the us-east-1 Region, using fully configured Amazon Machine Images (AMIs). The company has an AWS CloudFormation template to deploy resources in us-east-1. What should the SysOps administrator do to provision the application in the MOST operationally efficient manner?
A. Copy the AMI to each Region by using the aws ec2 copy-image command. Update the CloudFormation template to include mappings for the copied AMIs.
B. Create a snapshot of the running instance. Copy the snapshot to the other Regions. Create an AMI from the snapshots. Update the CloudFormation template for each Region to use the new AMI.
C. Run the existing CloudFormation template in each additional Region based on the success of the template that is used currently in us-east-1.
D. Update the CloudF ormation template to include the additional Regions in the Auto Scaling group. Update the existing stack in us-east-1.
Answer
A. Copy the AMI to each Region by using the aws ec2 copy-image command. Update the CloudFormation template to include mappings for the copied AMIs.
Explanation
The correct answer is A. Copy the AMI to each Region by using the aws ec2 copy-image command. Update the CloudFormation template to include mappings for the copied AMIs.
An AMI is a template that contains the configuration and software for launching an EC2 instance. An AMI is specific to a Region, which means that you can only use it to launch instances in the same Region where it is stored. If you want to launch instances in other Regions using the same AMI, you need to copy the AMI to those Regions first.
To copy an AMI to another Region, you can use the aws ec2 copy-image command from the AWS CLI, or use the Copy Image option from the EC2 console. You need to specify the source Region, the source AMI ID, and the destination Region where you want to copy the AMI. You can also specify other options, such as a name, a description, or encryption settings for the copied AMI. The copy operation will create a new AMI in the destination Region with a new AMI ID.
To provision an application in multiple Regions using CloudFormation, you need to have a CloudFormation template that describes the resources and their properties that you want to create. You can use CloudFormation to create and manage stacks, which are collections of resources that are created and managed as a single unit. You can create stacks in different Regions using the same template, as long as the template is compatible with those Regions.
To use an AMI in a CloudFormation template, you need to specify its ID as a parameter or a mapping in the template. A parameter is a value that you provide when you create or update a stack, such as an AMI ID or an instance type. A mapping is a fixed set of values that you define in the template, such as a list of AMI IDs for different Regions or instance types. You can use mappings to create conditional logic in your template, such as choosing an AMI based on the Region where you create the stack.
By using this solution, you can provision an application in multiple Regions using CloudFormation and an AMI. This solution meets the requirements of the company, as it allows them to scale their architecture to four additional Regions using fully configured AMIs and a single CloudFormation template. This solution is also the most operationally efficient one, as it does not require them to use any additional services or tools. It also leverages the existing functionality and scalability of EC2, CloudFormation, and AMIs.
The other options are not correct for the following reasons:
B. Create a snapshot of the running instance. Copy the snapshot to the other Regions. Create an AMI from the snapshots. Update the CloudFormation template for each Region to use the new AMI.
This option is not operationally efficient, as it requires them to create and manage multiple snapshots and AMIs for each Region. It also requires them to update the CloudFormation template for each Region separately, which can introduce errors and inconsistencies.
C. Run the existing CloudFormation template in each additional Region based on the success of the template that is used currently in us-east-1.
This option is not correct, as it does not address the issue of using an AMI in multiple Regions. The existing CloudFormation template may not be compatible with other Regions if it uses an AMI that is specific to us-east-1. The company needs to copy the AMI to other Regions and update the template accordingly.
D. Update the CloudFormation template to include the additional Regions in the Auto Scaling group. Update the existing stack in us-east-1.
This option is not correct, as it does not address the issue of provisioning an application in multiple Regions using CloudFormation and an AMI. Auto Scaling is a service that enables you to automatically adjust the number of EC2 instances based on demand or schedule within a single Region. However, Auto Scaling does not create or manage any stacks or resources in other Regions for you. It only scales your instances within a single Region where your stack is located.
Amazon AWS Certified SysOps Administrator – Associate certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Amazon AWS Certified SysOps Administrator – Associate exam and earn Amazon AWS Certified SysOps Administrator – Associate certification.