Linkerd doesn't work with .NET Core Grpc Service

[MartinKosicky]

Linkerd doesn't work with .NET Core Grpc Service

[MartinKosicky]

Also by checking a similiar bug, this was discussed here dotnet/aspnetcore#14745 although the authors of the grpc dont consider it to be correct to send the :scheme that way and are not planning to ease validation. I am not sure when is the scheme build, but it would make sence to specify it somewhere in the Transformer (or have the ability to prepend https:// or http:// ) I

[adleong]

Thanks, @MartinKosicky! Yes, I think you are correct that Linkerd should set the :scheme pseudoheader to http or https as appropriate when proxying the request rather than just forwarding the existing value.

[astryia]

I'm experiencing exactly the same problem, the only difference is that client connecting to the Linkerd sidecar without TLS and then Linkerd setup secure connection to the remote service:

 Microsoft.AspNetCore.Server.Kestrel[35]
      Trace id "0HM40TS2KM45M:00000005": HTTP/2 stream error "PROTOCOL_ERROR". A Reset is being sent to the stream.
Microsoft.AspNetCore.Connections.ConnectionAbortedException: The request :scheme header 'http' does not match the transport scheme 'https'.

[cpretzer]

@astryia thanks for the confirmation.

If you're interested in contributing a PR, we'd love to have a fix for this.

[ahmetb]

I think this is dotnet/aspnetcore#30532