Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 243 discussion

C should be it. Shift traffic in two batches is Canary Validation is done with hooks https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/automating-updates-to-serverless-apps.html

A

A. Set the Deployment Preference Type to Canary10Percent10Minutes. Set the AutoPublishAlias property to the Lambda alias. Most Voted

A is the answer. The PreTraffic and PostTraffic properties are used for specifying validation Lambda functions to run before and after traffic shifting, respectively. They are not required for the basic canary deployment scenario described.

MyFunction: Type: AWS::Serverless::Function Properties: # ... other properties ... AutoPublishAlias: live DeploymentPreference: Type: Canary10Percent10Minutes

I will go with A since the question only mentions switch traffic gradually. Ideally A and C should be used as a combination.

I feel it should be C. https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/automating-updates-to-serverless-apps.html

Answer is A: https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/automating-updates-to-serverless-apps.html When deploying a Lambda function gradually, CodeDeploy requires a previously deployed function version to shift traffic from. Therefore, your first deployment should be accomplished in two steps: Step 1: Deploy your Lambda function and automatically create aliases with AutoPublishAlias. Step 2: Perform your gradual deployment with DeploymentPreference.

A is the correct answer.

This configuration specifies a canary deployment strategy where 10% of the traffic is directed to the new deployment for the first 10 minutes after deployment. If there are no issues, all traffic will automatically switch over to the new version. Setting the AutoPublishAlias property to the Lambda alias ensures that the specified alias is automatically updated after the canary period.

I am going with C

https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/automating-updates-to-serverless-apps.html The success or failure of the deployment is determined by hooks

I go with A!

AutoPublishAlias is a requirement. Pre and Post traffic handlers are nice to have

This configuration will ensure that during deployment, 10% of the traffic is shifted to the new version for 10 minutes as a "canary" release. If no issues are detected during this period, AWS SAM will automatically shift the rest of the traffic to the new version. The AutoPublishAlias property is used to specify the alias that the AWS SAM deployment process will update to point to the new version of the function.

set the Deployment Preference Type to Canary10Percent10Minutes and set the AutoPublishAlias property to the Lambda alias.

https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/automating-updates-to-serverless-apps.html