Cannot tunning simple Gateway for 2 microservices in docker. Please help me

[P9avel]

Hello, i think this is very simple issue, but i am cannot solve themself. Please read my description. I am have

1. Payment service

namespace Payments.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class PaymentController : ControllerBase
    {
        private readonly ILogger<PaymentController> _logger;

        public PaymentController(ILogger<PaymentController> logger)
        {
            _logger = logger;
        }

        [HttpGet]
        public string Get()
        {
            return "PaymentService";
        }
    }
}

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

3. Client service

using Microsoft.AspNetCore.Mvc;

namespace Clients.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class ClientController : ControllerBase
    {
       private readonly ILogger<ClientController> _logger;

        public ClientController(ILogger<ClientController> logger)
        {
            _logger = logger;
        }

        [HttpGet]
        public string Get()
        {
            return "ClientService";
        }
    }
}

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

4. Gateway

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddReverseProxy()
    .LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"));
var app = builder.Build();
app.MapReverseProxy();
app.Run();

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "ReverseProxy": {
    "Routes": {
      "payments": {
        "ClusterId": "payments",
        "Match": {
          "Path": "/payments/{**catch-all}"
        }
      },
      "clients": {
        "ClusterId": "clients",
        "Match": {
          "Path": "/clients/{**catch-all}"
        }
      }
    },
    "Clusters": {
      "payments": {
        "Destinations": {
          "destination1": {
            "Address": "https://payment/"
          }
        }
      },
      "clients": {
        "Destinations": {
          "destination1": {
            "Address": "https://client/"
          }
        }
      }
    }
  }
}

6. Docker compose running

version: '3.4'

services:
  payments:
    image: ${DOCKER_REGISTRY-}payments
    hostname: payment
    container_name: Payment
    ports:
      - 51001:443
    build:
      context: .
      dockerfile: Payments/Dockerfile

  clients:
    image: ${DOCKER_REGISTRY-}clients
    hostname: client
    container_name: Client
    ports:
      - 51002:443
    build:
      context: .
      dockerfile: Clients/Dockerfile


  gateway:
    image: ${DOCKER_REGISTRY-}gateway
    hostname: gateway
    container_name: Gateway
    ports:
      - 51000:443
    build:
      context: .
      dockerfile: Gateway/Dockerfile

When i am running in postman GET https://localhost:51000/payments
i am reciver 502 badgateway and in Visual studio i am get errors

info: Yarp.ReverseProxy.Forwarder.HttpForwarder[48]
      Request: An error was encountered before receiving a response.
      System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
       ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure: RemoteCertificateNameMismatch, RemoteCertificateChainErrors
         at System.Net.Security.SslStream.SendAuthResetSignal(ProtocolToken message, ExceptionDispatchInfo exception)
         at System.Net.Security.SslStream.CompleteHandshake(SslAuthenticationOptions sslAuthenticationOptions)
         at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](TIOAdapter adapter, Boolean receiveFirst, Byte[] reAuthenticationData, Boolean isApm)
         at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
         --- End of inner exception stack trace ---

In attach i am put full solution. Please help me with

1. I need worked solution without this exception
2. I am want to add Swagger and see all APIs

TestGateway.zip

[samsp-msft]

Your routes map to https://payment, but without a port number. Your docker configuration has them on ports 51001, so its probably not reaching the destination that it thinks it is, hence the TLS error that you are seeing.

[P9avel]

Hello, thank you for your help. I am changes

"Clusters": {
      "payments": {
        "Destinations": {
          "destination1": {
            "Address": "https://payment:51001/"
          }
        }
      },
      "clients": {
        "Destinations": {
          "destination1": {
            "Address": "https://client:51002/"
          }
        }
      }
    }

But now get

info: Yarp.ReverseProxy.Forwarder.HttpForwarder[9]
      Proxying to https://payment:51001/payments HTTP/2 RequestVersionOrLower no-streaming
Yarp.ReverseProxy.Forwarder.HttpForwarder: Information: Proxying to https://payment:51001/payments HTTP/2 RequestVersionOrLower no-streaming
info: Yarp.ReverseProxy.Forwarder.HttpForwarder[48]
      Request: An error was encountered before receiving a response.
      System.Net.Http.HttpRequestException: Connection refused (payment:51001)
       ---> System.Net.Sockets.SocketException (111): Connection refused
         at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)

[samsp-msft]

For some reason the proxy can't access payments:51001. That is something you will need to diagnose, I would suggest starting with curl and trying those URLs from the cmd line.

[P9avel]

I am put TestGateway.zip can you to open and run docker file?

[karelz]

Sorry, this is not problem with YARP, but rather with your application. We cannot go and debug into that. Please analyze the root cause and if you have strong evidence it is problem with YARP, we will be happy to help. Thanks!