Moving k8s communication to gRPC

This post details Cloudflare's migration of internal service-to-service communication from REST to gRPC within their Kubernetes environment. It highlights the benefits of gRPC for microservice architecture, including improved performance through protobuf serialization and HTTP/2 multiplexing, enhanced developer usability by abstracting network calls into function calls, and better security through Kubernetes NetworkPolicies. The post also discusses the challenges faced with REST and Kafka for large data transfers like DNS zones and how gRPC addresses these.