[pgoggijr]

At Netflix scale, there most certainly is a service discovery registry where each service registers itself. The registry can be used for other services to find out how to reach each service, what regions those services are deployed in, how many instances of each service there are, what operations that service supports, etc.

https://devopscube.com/service-discovery-explained/

[ludovicianul]

They have Zuul: https://github.com/Netflix/zuul and Eureka: https://github.com/Netflix/eureka