Question

A development team deploys a serverless order-processing API using AWS Lambda behind an alias. They use AWS CodeDeploy for deployments and want to shift 10% of traffic to the new version for 5 minutes, then shift the remaining traffic if no errors occur. If the new version produces elevated error rates during the canary period, the deployment must automatically roll back to the previous version without manual intervention. Which configuration meets these requirements with the least operational effort?

Accepted Answer

Use the CodeDeploy deployment configuration Canary10Percent5Minutes and configure a CloudWatch alarm on the Lambda function error metric as a rollback trigger in the deployment group.

Answer

Use the CodeDeploy deployment configuration Linear10PercentEvery5Minutes and enable X-Ray tracing so CodeDeploy can detect errors and roll back automatically.

Answer

Use a Lambda weighted alias with a scheduled EventBridge rule that manually increments the weight and invokes a Lambda function to check CloudWatch metrics before shifting all traffic.

Answer

Use the CodeDeploy deployment configuration AllAtOnce combined with a CloudWatch alarm rollback trigger to immediately revert if the new version errors.