dongyixiu3110 2017-05-11 09:40
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无法连接到在本地Docker容器中运行的Go GRPC服务器

I have a go grpc service. I'm developing on a mac, sierra. When running a grpc client against the service locally, all is well, but when running same client against same service in the docker container I get this error:

transport: http2Client.notifyError got notified that the client transport was broken EOF.
FATA[0000] rpc error: code = Internal desc = transport is closing

this is my docker file:

FROM golang:1.7.5

RUN mkdir -p /go/src/github.com/foo/bar
WORKDIR /go/src/github.com/foo/bar

COPY . /go/src/github.com/foo/bar
# ONBUILD RUN go-wrapper download
RUN go install

ENTRYPOINT /go/bin/bar

EXPOSE 51672

my command to build the image:

docker build -t bar .

my command to launch the docker container:

docker run -p 51672:51672 --name bar-container bar

Other info:

  • client program runs fine from within the docker container
  • connecting to a regular rest endpoint works fine (http2, grpc related?)
  • running the lsof command in OS X yields these results

    $lsof -i | grep 51672
    com.docke   984 oldDave   21u  IPv4 0x72779547e3a32c89      0t0  TCP *:51672 (LISTEN)
    com.docke   984 oldDave   22u  IPv6 0x72779547cc0fd161      0t0  TCP localhost:51672 (LISTEN)
    
  • here's a snippet of my server code:

    server := &Server{}
    endpoint := "localhost:51672"
    lis, err := net.Listen("tcp", endpoint)
    if err != nil {
        log.Fatalf("failed to listen: %v", err)
    }
    
    s := grpc.NewServer(grpc.Creds(creds))
    
    pb.RegisterExpServiceServer(s, server)
    
    // Register reflection service on gRPC server.
    reflection.Register(s)
    
    log.Info("Starting Exp server: ", endpoint)
    
    if err := s.Serve(lis); err != nil {
        log.Fatalf("failed to serve: %v", err)
    }
    
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