Clarifitcations regarding sticky load balancing example architecture by Mathew Hobbis

Thanks @brigadier90 @Aaron and @mhobbis for this thread, this helped me too to understand the concept of Sticky Load Balancing approach… However I am still are unclear on the query that

How will our client service instances get to know theirs sequence or index number… Is there a way we can maintain that count and share it accross all the instances of service…
If there is Such a way then can that be done in Microservice based architecture where all the instances are running on their seperate pods/ docker container