Support Channelz

[jbayardo]

It seems that grpc-core has had channelz activated by default for a long time now.

C# has been missing support for this feature, as per grpc/grpc#19909, making it difficult to debug issues with gRPC.

It would be great to have it!

[jtattermusch]

@jbayardo the issue you mentioned is for gRPC C# based on grpc-core (the Grpc.Core nuget), not for grpc-dotnet.

That said, it is true that channelz (https://github.com/grpc/grpc/blob/master/src/proto/grpc/channelz/channelz.proto) are not supported by grpc-dotnet. Adding it is a significant amount of work and there's currently no ETA. We'd also need to verify that ASP.NET core HTTP2 stack exposes all the necessary internals to be able to implement the channelz service at all.

[davidfowl]

@jtattermusch is there a write up somewhere?

[jtattermusch]

The spec is here: https://github.com/grpc/proposal/blob/master/A14-channelz.md

[paulomorgado]

Any update on this?