Implement Full‑Link Gray Release with Spring Cloud Gateway, Ribbon, and OpenFeign
This article explains how to achieve full‑link gray (canary) release in a microservice architecture by adding a gray tag in a Spring Cloud Gateway global filter, propagating it through request headers, customizing Ribbon load‑balancing rules to select gray instances from Nacos, and using an OpenFeign interceptor to transmit the tag downstream, ensuring seamless A/B testing and stable deployments.
