尝试访问同一网络上的 grpc 服务器时 grpc 客户端 dns 解析失败

Question

我正在尝试从 Python 客户端调用在 .Net Core 项目上运行的 GRPC 服务器。

当针对localhost:5001它运行时工作正常，但针对同一网络内机器的实际 IP 运行时，192.168.1.230:5001它不起作用，并且出现错误DNS resolution failed。

我已经下载了 SSL 证书，目前正在从客户端将其作为文件读取。它在对抗时有效，localhost所以我认为这不是问题。

有没有更好的方法来进行这种让客户端在单独的设备上运行但与服务器在同一网络上的测试？在开发过程中将 GRPC 服务器托管在外部似乎并不是最好的解决方案。

Python代码：

import grpc
import datamessage_pb2 as datamessage
import datamessage_pb2_grpc as datamessageService


def main():
    print("Calling grpc server")
    with open("localhost.cer", "rb") as file:
        cert = file.read()
    credentials = grpc.ssl_channel_credentials(cert)
    channel = grpc.secure_channel("https://192.168.1.230:5001", credentials)
    # channel = grpc.secure_channel("localhost:5001", credentials)
    stub = datamessageService.StationDataHandlerStub(channel)
    request = datamessage.StationDataModel(
        temperature=22.3, humidity=13.3, soilMoisture=35.0)

    result = stub.RegisterNewStationData(request)
    print(result)


main()

服务器设置在Program.cs：

public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseUrls("https://*:5001");
                    webBuilder.UseStartup<Startup>();
                });

防火墙中的设置：

追溯：

grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with:
        status = StatusCode.UNAVAILABLE
        details = "DNS resolution failed"
        debug_error_string = "{"created":"@1576101634.549000000","description":"Failed to pick subchannel","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":3934,"referenced_errors":[{"created":"@1576101634.549000000","description":"Resolver transient failure","file":"src/core/ext/filters/client_channel/resolving_lb_policy.cc","file_line":262,"referenced_errors":[{"created":"@1576101634.549000000","description":"DNS resolution failed","file":"src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc","file_line":202,"grpc_status":14,"referenced_errors":[{"created":"@1576101634.549000000","description":"OS Error","file":"src/core/lib/iomgr/resolve_address_windows.cc","file_line":96,"os_error":"No such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}]}]}]}"

Answer 1

https:Python gRPC 客户端中，需要调用无协议（ ）的通道。因此，我使用以下命令在 dotnet core 框架中调用了 gRPC 服务，并且它起作用了。请注意，dotnet gRPC 服务器正在侦听https://localhost:5001.

with open('localhost.crt', 'rb') as f:
    credentials = grpc.ssl_channel_credentials(f.read())
with grpc.secure_channel('localhost:5001', credentials) as channel:
    stub = pb2_grpc.GreeterStub(channel)
    request = pb2.HelloRequest(name = "GreeterPythonClient")
    response = stub.SayHello(request)