AWS CodeDeploy now supports using Application Load Balancers for both blue/green and in-place deployments. With this update, you can choose between a Classic Load Balancer and an Application Load Balancer for your deployment groups. For blue/green deployments, CodeDeploy re-routes the traffic from instances in the original environment to those in the replacement environment. For in-place deployments, using a load balancer with CodeDeploy increases the fault tolerance of your application as it prevents traffic from being routed to instances that are currently being deployed to. For more information, see Integrating AWS CodeDeploy with Elastic Load Balancing.