Using Apache Kafka to process 1 trillion inter-service messages

This post details Cloudflare's extensive adoption and internal tooling development around Apache Kafka for inter-service communication. It highlights the use of Kafka to process over a trillion messages, the creation of internal tools like Messagebus-Client and a connector framework for easier adoption, the implementation of strict schemas using Protobuf for forward/backward compatibility, and the establishment of robust observability through automated metrics and alerts. It also provides a practical example of how this framework supports the Alert Notification System.