How should the developer manage the deployment of the new version?
Modify the CloudFormation template to include a Transform section and the AWS::CodeDeploy::BlueGreen hook.
Deploy the new version in a new CloudFormation stack. After testing is complete, update the application’s DNS records for the new stack.
Run CloudFormation stack updates on the application stack to deploy new application versions when they are available.
Create a nested stack for the new version. Include a Transform section and the AWS::CodeDeploy::BlueGreen hook.
Explanations:
Using theTransformsection withAWS::CodeDeploy::BlueGreenenables AWS CloudFormation to automatically manage blue-green deployments in Amazon ECS. This approach allows the new version to be gradually deployed to users.
Deploying the new version in a new stack and updating DNS manually is not automated. It also does not leverage blue-green deployments or CodeDeploy, which would handle the gradual rollout more effectively.
Running CloudFormation stack updates will not facilitate a gradual rollout with blue-green deployment. It would replace the application version directly, which may lead to disruptions for users without controlled traffic shifting.
While creating a nested stack could help organize resources, it is not required for blue-green deployment. Only option A correctly usesAWS::CodeDeploy::BlueGreenfor automated blue-green deployment management.
If memory serves me right, the answer is:
Modify the CloudFormation template to include a Transform section and the AWS::CodeDeploy::BlueGreen hook.