In the modern world of cloud-based microservices and continuous delivery, [blue/green deployments](https://martinfowler.com/bliki/BlueGreenDeployment.html) (a.k.a red/black deployments) have become commonplace. But the load balancer isn't the only source of traffic to your service. What about the message bus, scheduled tasks, or polling operations? How do you ensure background tasks are only processed by the live version of the service, not the previous version? Learn how you can solve this problem quickly and easily on Kubernetes using Shawarma, with minimal changes to your application code.