Tech Freedom Circle

Nov 3, 2025 · Backend Development

How to Build a Custom Spring Cloud Starter for Dynamic Gray Release

This article walks through the design and implementation of a self‑developed Spring Cloud LoadBalancer starter that supports dynamic gray routing, explaining why the default round‑robin strategy is insufficient, dissecting Spring Cloud LoadBalancer internals, and providing step‑by‑step code, Nacos configuration, and verification scripts to achieve safe, weighted traffic shifting during releases.