A developer is creating AWS CloudFormation templates to manage an application's deployment in Amazon Elastic Container Service (Amazon ECS) through AWS CodeDeploy. The developer wants to automatically deploy new versions of the application to a percentage of users before the new version becomes available for all users. How should the developer manage the deployment of the new version?
A) Modify the CloudFormation template to include a Transform section and the AWS::CodeDeploy::BlueGreen hook.
B) Deploy the new version in a new CloudFormation stack. After testing is complete, update the application's DNS records for the new stack.
C) Run CloudFormation stack updates on the application stack to deploy new application versions when they are available.
D) Create a nested stack for the new version. Include a Transform section and the AWS::CodeDeploy::BlueGreen hook.

Question

Quizplus · Accepted Answer

The AWS::CodeDeploy::BlueGreen hook in the Transform section of a CloudFormation template allows for blue/green deployments, which can gradually shift traffic to a new application version, enabling testing with a subset of users before full deployment.

A Developer Is Creating AWS CloudFormation Templates to Manage an Application's