The initial controller for processing MeshFederation resources does not update any generated istio configuration nor does it modify the associated service registry. When a MeshFederation resource is updated, the controller should also update the istio config and the associated service registry so it is consistent with what is specified in the new MeshFederation resource.

ACs:

• Users can update MeshFederation resources and changes are applied by istiod
• Disruption of service should be limited to actual changes in services exported by remote mesh