Istio’s service mesh is able to manage traffic distribution with complete independence from deployment scaling, which enables a simpler, yet significantly more functional way to realize canary release and rollout. It allows users to introduce a new version of service by first testing it using a small percentage of user traffic, and then if all goes well, increase, possibly gradually in increments, the percentage while simultaneously phasing out the old version.
KubeSphere provides three kinds of grayscale strategies based on Istio, including blue-green deployment, canary release, and traffic mirroring. Without modifying the source code, KubeSphere can realize grayscale, traffic governance, tracing, traffic monitoring, and other service mesh features.