How all,
We’ve seen a number of requests for “per-node services” - when I ask for a 
Service IP, I always get the service on my local node. But what about the 
arbitrary topoloy key, e.g. same rack, same failure zone?
There is a proposal https://github.com/kubernetes/community/pull/1551, 
which is available now. The objective of this proposal is to figure out a 
generic way to implement the "local service", say "topology aware routing 
of service". Locality is defined by user, it can be any topology-related 
thing. "Local" means the "same topology level", e.g. same node, same rack, 
same failure zone, same failure region, same cloud provider etc.
*I am writing this letter for asking user cases to refine service API.* 
Please feel free to fill comment in  
https://github.com/kubernetes/community/pull/1551 
directly.
Thanks!
--BR,Du Jun

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