gRPC Conf 2025

As distributed systems grow in complexity, ensuring correctness under failure and race conditions becomes increasingly difficult. Traditional integration testing for gRPC based services often falls short: it’s flaky, non-deterministic, and hard to reproduce. What if we could simulate a full network stack deterministically from service-to-service communication down to dropped packets and reordered messages?

We present an innovative way to build and test gRPC-Rust (Tonic) services in Rust by leveraging Rust’s ecosystem. We will walk through how to build gRPC services that can be simulated with minimal changes to your code base. The result: rock-solid, reproducible test scenarios for everything from retries and backoffs to leader election and network partitions.