Question 1

How to use prost codec with gRPC-rs instead of protobuf?

Accepted Answer

Enable the 'prost-codec' feature in your Cargo.toml, but be cautious: the README notes that grpcio-compiler might not work as expected if both 'prost-codec' and 'protobuf-codec' are enabled simultaneously, so stick to one for generation.

Question 2

gRPC-rs vs tonic: which is better for Rust gRPC?

Accepted Answer

gRPC-rs is a wrapper around C-based gRPC Core, offering full interoperability and performance, while tonic is a pure-Rust implementation with different trade-offs like easier setup but potentially less ecosystem compatibility. Choose gRPC-rs for strict gRPC compliance and tonic for a more Rust-native experience.

Question 3

How to fix OpenSSL linking errors in gRPC-rs?

Accepted Answer

Specify the 'openssl' feature in your Cargo.toml for grpcio, as the README explains, to use OpenSSL instead of BoringSSL and avoid symbol clashes with other dependencies that rely on OpenSSL.

Question 4

Is gRPC-rs production ready for Windows?

Accepted Answer

It supports Windows but requires heavy dependencies like Active State Perl, yasm, and Visual Studio 2015+, which can be a barrier. The README lists these prerequisites, so assess your team's setup capabilities before committing.

Question 5

What's the status of load balancing in gRPC-rs?

Accepted Answer

Client-side load balancing is fully supported, but server-side load reporting is not implemented yet, as per the README's status section. This limits advanced balancing features in some deployments.

Question 6

How to generate gRPC stubs from proto files in a build script?

Accepted Answer

Use the protoc-grpcio crate programmatically in your build.rs, as described in the README under 'Option 2 - Programmatic Generation'. This automates source generation from .proto files during compilation.

grpc-rs

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