grpc/grpc-java

gRPC Mirroring

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#12,448 创建于 2025年10月28日

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 (3 评论) (0 反应) (0 负责人)Java (11,124 star) (3,742 fork)batch import
enhancementhelp wanted

描述

Is your feature request related to a problem?

Envoy supports request mirroring, which sends the same event to a primary Envoy cluster and also forwards it to another secondary cluster, configured either statically or dynamically.

This feature would be handy for testing and validation, such as migrating from one service to another or checking for regressions between two versions.

Describe the solution you'd like

The solution we are looking for is the ability to mirror the same requests sent to two different gRPC services based on a static definition, like in here: https://www.envoyproxy.io/docs/envoy/latest/start/sandboxes/route-mirror.html

Describe alternatives you've considered

One alternative would be to proxy our traffic through an Envoy deployment, but this would mean an extra hop in our system, as we are doing client-side load balancing right now.

贡献者指南

技术栈
grpcjava
领域
backendapi
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
4
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
over 1 week
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
fresh
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
gRPCJavarequest mirroring conceptsprotocol buffers
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
25
研究方向
Start by studying the existing Envoy route mirroring sandbox to understand the desired behavior. Then, examine the gRPC Java client side load balancing and interceptor architecture to identify where mirroring logic could be inserted. Review the issue comments for any additional maintainer guidance, and consider proposing a design document or a minimal proof of concept.