Question

A team deploys a serverless payment API using AWS Lambda with an alias behind API Gateway. They use CodeDeploy for deployments and want the following behavior: after deploying a new version, 10% of traffic should shift to it immediately, then the remaining 90% should shift after 10 minutes. If a CloudWatch alarm monitoring the function's error rate breaches during the deployment, CodeDeploy must automatically revert all traffic to the previous version. Which combination of CodeDeploy configuration correctly implements these requirements?

Accepted Answer

Use the deployment configuration CodeDeployDefault.LambdaCanary10Percent10Minutes, associate the CloudWatch alarm with the deployment group, and enable automatic rollback on deployment failure and alarm threshold.

Answer

Use the deployment configuration CodeDeployDefault.LambdaLinear10PercentEvery10Minutes, associate the CloudWatch alarm, and enable automatic rollback on alarm threshold.

Answer

Use the deployment configuration CodeDeployDefault.LambdaAllAtOnce, add a BeforeAllowTraffic Lambda hook that checks the alarm, and enable automatic rollback.

Answer

Use CodeDeployDefault.LambdaCanary10Percent5Minutes, associate the CloudWatch alarm, and rely on the AfterAllowTraffic hook to trigger a manual rollback if the alarm fires.