Kubeless was designed to be a Kubernetes-native serverless framework, and, for PubSub functions, uses Apache Kafka behind the scenes. At Banzai Cloud we like cloud-native technologies, however, we weren’t happy about having to operate a Zookeeper cluster on Kubernetes, so we modified and open-sourced a version for Kafka in which we replaced Zookeeper with etcd, which was (and still is) a better fit. This post is part of our serverless series, which discusses deploying Kubeless, using Kafka on etcd with Pipeline, and deploying a so called PubSub function.