Per ListeningPort network namespace (c++)

[Dylan Walsh]

Hey all,

I was wondering if a single c++ gRPC server has the ability to bind to different addresses within different network namespaces:

e.g localhost:4566 in network namespace default

       localhost:4567 in network namespace red

Currently, I can switch namespace (setns) before calling BuildAndStart() for a ServerBuilder object. But this causes all configured listening ports to bind within the same namespace. 

I was curious if there is any existing functionality for allowing calls to AddListeningPort(..) to specify the network namespace to use (or some other way of achieving this).

Kind Regards,

Dylan

[yas...@google.com]

gRPC C++ doesn't have a way of doing that. It looks like the way processes switch network namespaces is by using `ip netns exec` but that's not what we want.

[Dylan Walsh]

Thanks for the quick confirmation, Yash. 

I thought as much, I'll just stick to one network namespace for now!

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