gRPC：无法从 Windows 客户端连接到 Linux 服务

Question

我正在尝试在我的项目中开始使用 gRPC 服务。 一开始，我在 Visual Studio 中使用了一个测试项目，该项目是在您添加 gRPC 服务项目时自动创建的。这是一些代码。

客户：

class Program
{
    static async Task Main(string[] args)
    { 
        HttpClientHandler clientHandler = new HttpClientHandler
        {
            ServerCertificateCustomValidationCallback = (sender, cert, chain, sslPolicyErrors) => { return true; }
        };

        HttpClient httpClient = new HttpClient(clientHandler);

        using var channel = GrpcChannel.ForAddress("https://localhost:55555",
            new GrpcChannelOptions { HttpClient = httpClient });

        var client = new Greeter.GreeterClient(channel);
        Console.Write("Name: ");
        string name = Console.ReadLine();

        var reply = await client.SayHelloAsync(new HelloRequest { Name = name });
        Console.WriteLine("Response: " + reply.Message);
        Console.ReadKey();
    }
}

服务：

public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run();
    }

    // Additional configuration is required to successfully run gRPC on macOS.
    // For instructions on how to configure Kestrel and gRPC clients on macOS, visit https://go.microsoft.com/fwlink/?linkid=2099682
    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)

            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            });
}

public class GreeterService : Greeter.GreeterBase
{
    private readonly ILogger<GreeterService> _logger;
    public GreeterService(ILogger<GreeterService> logger)
    {
        _logger = logger;
    }

    public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
    {
        return Task.FromResult(new HelloReply
        {
            Message = "Hello " + request.Name
        });
    }
}

我在 appsettings.json 中覆盖了默认的 5001 端口：

{
"Logging": {
    "LogLevel": {
        "Default": "Debug",
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information",
        "Grpc": "Debug"
    }
},
"AllowedHosts": "*",
"Kestrel": {
    "EndPoints": {
        "Http": {
            "Url": "https://localhost:55555"
        }
    },
    "EndpointDefaults": {
        "Protocols": "Http2"
    }
}  }

当客户端和服务都在 Windows 机器上时，我启动项目没有问题，这是一个屏幕截图：

当它们都在 Linux 机器上时也是如此：

但我无法使其与在 Windows 上运行的客户端和在 Linux 上运行的服务一起工作。 我对 Linux 了解不多，但在我看来，问题可能在于我无法从我的 Windows 机器访问端口 55555。

我尝试使用 Powershell 对其进行测试，结果如下：

我检查了服务正在运行并且端口是打开的，这是我尝试的一些命令和我得到的结果：

[user@localhost ~]$ grep -w 55555 /etc/services
test        55555/tcp       # TestService

[user@localhost ~]$ sudo lsof -i -P -n | grep LISTEN
[sudo] password for user: 
GrpcServi 10933         user  166u  IPv4 1090871      0t0  TCP 127.0.0.1:55555 (LISTEN)
GrpcServi 10933         user  167u  IPv6 1090874      0t0  TCP [::1]:55555 (LISTEN)

[user@localhost ~]$ sudo netstat -tulpn | grep LISTEN     
tcp        0      0 127.0.0.1:55555         0.0.0.0:*               LISTEN      10933/./GrpcService 
tcp6       0      0 ::1:55555               :::*                    LISTEN      10933/./GrpcService 

[user@localhost ~]$ sudo netstat -tulpn | grep :55555
tcp        0      0 127.0.0.1:55555         0.0.0.0:*               LISTEN      10933/./GrpcService 
tcp6       0      0 ::1:55555               :::*                    LISTEN      10933/./GrpcService 

[user@localhost ~]$ sudo ss -tulpn | grep LISTEN                                               
tcp   LISTEN   0        128              127.0.0.1:55555          0.0.0.0:*      users: 
(("GrpcService",pid=10933,fd=166))                                                                                   
tcp   LISTEN   0        128                  [::1]:55555             [::]:*      users: 
(("GrpcService",pid=10933,fd=167))                                       

[user@localhost ~]$ sudo ss -tulpn | grep ':55555'
tcp   LISTEN   0        128              127.0.0.1:55555          0.0.0.0:*      users: 
(("GrpcService",pid=10933,fd=166))                                       
tcp   LISTEN   0        128                  [::1]:55555             [::]:*      users: 
(("GrpcService",pid=10933,fd=167))                                       

[user@localhost ~]$ sudo lsof -i -P -n | grep LISTEN
GrpcServi 10933         user  166u  IPv4 1090871      0t0  TCP 127.0.0.1:55555 (LISTEN)
GrpcServi 10933         user  167u  IPv6 1090874      0t0  TCP [::1]:55555 (LISTEN)

[user@localhost ~]$ sudo firewall-cmd --zone=public --list-all
[sudo] password for user: 
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: enp2s0
  sources: 
  services: cockpit dhcpv6-client ssh
  ports: 3389/tcp 3389/udp 55555/tcp 
  protocols: 
  masquerade: yes
  forward-ports: 
  source-ports: 
  icmp-blocks: 
  rich rules: 

我还尝试在 Windows 和 Linux 上禁用防火墙以检查是否有帮助，但无济于事。

两台机器在同一个网络中。 CentoOS 8 和 Windows 10。

Answer 1

在这里找到我的答案https://unix.stackexchange.com/questions/578677/unable-to-connect-to-a-linux-port-from-window

必须将 appsettings.json 文件中的 "Url": "https://localhost:55555" 更改为 "Url": "https://0.0.0.0:55555"