Question

A company deploys a monolithic Java application to an EC2 Auto Scaling group behind an Application Load Balancer using AWS CodeDeploy with a blue/green deployment. After each successful deployment, the operations team notices that the original (blue) instances remain running for hours, increasing costs. They want the original instances to be terminated automatically 15 minutes after traffic is successfully rerouted to the replacement environment, giving them a short window to validate before rollback becomes impossible. Which CodeDeploy configuration change achieves this?

Accepted Answer

In the deployment group's Blue/Green deployment settings, choose 'Terminate the original instances in the deployment group' and set the wait time to 15 minutes.

Answer

In the deployment group, set the deployment configuration's rollback behavior to 'Reroute traffic immediately' and reduce the ALB deregistration delay to 15 minutes.

Answer

Enable 'Keep the original instances running' and create an EventBridge rule that terminates the instances 15 minutes after the deployment succeeds.

Answer

Change the deployment configuration to CodeDeployDefault.AllAtOnce so the original instances are replaced in place after 15 minutes.