gRPC Conf 2024

In 2022, LinkedIn started its migration towards Envoy and gRPC to replace its in-house RPC solution rest.li. To bridge the gap between the old service discovery and load balancing infrastructure, D2, we decided to implement a custom xDS backend that can serve both the old D2 clients and the new Envoy and gRPC ones. In this talk, I would like to share the various obstacles we ran into building and scaling this new system for the LinkedIn workload. I will focus on the challenges surrounding IPv6 routing, distributing load evenly using gRPC primitives and gracefully handling unbalanced load from the server. https://docs.google.com/document/d/19fmrxaryIwmshSPS5mg9lVzqLDNPuXljmM8pbCPmo9o/edit?usp=sharing