Migrating from AWS CodeDeploy to Amazon ECS for blue/green deployments

With blue/green deployments, you can release new software by shifting traffic between two identical environments that are running different versions of an application. This mitigates common risks associated with deploying new software releases, by facilitating the safe testing of new deployments and providing a rollback capability with near-zero downtime.

Until recently, Amazon Elastic Container Service (Amazon ECS) only supported rolling updates as a native deployment strategy, and you needed to use AWS CodeDeploy if you wanted to implement blue/green deployments. This has changed with the recent launch of ECS blue/green deployments.

ECS blue/green deployments offer similar functionality to CodeDeploy, but there are some differences in the features available and their implementation. This post is targeted at organizations that currently use CodeDeploy for blue/green deployments on Amazon ECS, and that are considering a migration to the new Amazon ECS capability. It provides guidance …