Multicluster Replicated Control Plane is an uses case to enable communication between two service in difference service mesh without using Ingress and can enable mutual TLS between the service.

Istio 1.8 Upgrade Notes

Multicluster .global Stub Domain Deprecation

As part of this release, Istio has switched to a new configuration for multi-primary (formerly “replicated control planes”). The new configuration is simpler, has fewer limitations, and has been thoroughly tested in a variety of environments. As a result, the .global stub domain is now deprecated and no longer guaranteed to work going forward.

https://istio.io/v1.9/docs/setup/install/multicluster/multi-primary_multi-network/

Control plane models

多集群部署也可以共享控制面(control plane)服务实例。在这种情况下，控制面实例可以被一个或者多个primary cluster发现。

Reference

https://zufardhiyaulhaq.com/istio-multicluster-replicated-control-plane/

https://istio.io/latest/docs/setup/install/multicluster/

Isito 是对Service进行管理