Kestrel ListenUnixSocket

[Zetanova]

I am desperately trying to get only a gRPC server over Unix socket to work
with opt.ListenUnixSocket("/mydir/mysocket.sock") to work.

Can it be that only Kestrel supports LinuxUnixSocket but not grpc-dotnet?

[Zetanova]

The socket is working,
but following error is thrown on connection: Microsoft.AspNetCore.Connections.ConnectionAbortedException: Invalid Host header: 'csi/csi.sock'

The client is a golang kubernetes from https://github.com/kubernetes-csi/node-driver-registrar
and kubelet is fails too. It tries with the absolut hostPath.

I tried { AllowedHosts: "*" } and without the setting and cant find anything to disable the Host header check.

[analogrelay]

but following error is thrown on connection: Microsoft.AspNetCore.Connections.ConnectionAbortedException: Invalid Host header: 'csi/csi.sock'

This seems somewhat expected since / is not valid in an HTTP Host header. Since you're using a Unix socket, is it possible to configure your client to send a different Host header as a workaround? I'll file a matching bug on dotnet/aspnetcore to consider what we can do to be more generous in Kestrel.

[analogrelay]

I tried { AllowedHosts: "*" } and without the setting and cant find anything to disable the Host header check.

To clarify a bit. The request is failing Host header validation, which is part of Kestrel and verifies if the Host header is valid according to the HTTP spec. The AllowedHosts setting is for validating that the Host header matches an expected set of values, so that's why setting AllowedHosts to * doesn't work.

[analogrelay]

Filed dotnet/aspnetcore#18522

[Zetanova]

seeing it only now and i filed now one too.
dotnet/aspnetcore#18533

@anure All kubernetes golang libs including the kubelet daemon itself are connection with the socket path in http2 authority header field.

I will try to setup an proxy container to override it as a workaround.

[JamesNK]

This isn't an issue in the .NET gRPC library. Lets centralize discussion at dotnet/aspnetcore#18522