.NET Core 运行状况检查 UI 未显示

Question

我正在使用 .NET Core 3.1 并尝试设置运行状况检查，但遇到了一个奇怪的问题，需要一些帮助。

当我访问基本健康检查 URL (https://localhost:5001/hc) 时，我得到以下信息：

{
  "status": "Healthy",
  "errors": [
    {
      "key": "AssessmentContext",
      "value": "Healthy"
    }
  ]
}

看起来不错！然而，当我尝试进入用户界面时，它说该应用程序不健康。

因此它正确地提取了端点名称，但没有正确注册。

我的startup.cs文件如下所示：

public void ConfigureServices(IServiceCollection services) {
    ...

    services
        .AddHealthChecks()
        .AddDbContextCheck<AssessmentContext>();

    services.AddHealthChecksUI(opt => {
        opt.SetEvaluationTimeInSeconds(30);
        opt.MaximumHistoryEntriesPerEndpoint(60);

        opt.AddHealthCheckEndpoint(name: "app", uri: "~/hc");
    }).AddInMemoryStorage();

}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env) {
    ...

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapHealthChecks("/hc", new HealthCheckOptions
        {
            Predicate = _ => true,
            ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse,
        });

        endpoints.MapHealthChecksUI(opt => {
            opt.UseRelativeApiPath = false;
            opt.UseRelativeResourcesPath = false;
            opt.AsideMenuOpened = false;

            opt.UIPath = "/health";
            opt.ApiPath = "/healthAPI";
        });


        ...
    });
}

csproj 文件有以下版本：

<PackageReference Include="AspNetCore.HealthChecks.UI" Version="3.1.1" />
<PackageReference Include="AspNetCore.HealthChecks.UI.Client" Version="3.1.1" />
<PackageReference Include="AspNetCore.HealthChecks.UI.InMemory.Storage" Version="3.1.1" />
<PackageReference Include="AspNetCore.HealthChecks.System" Version="3.1.2" />
<PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="3.1.8" />
<PackageReference Include="AspNetCore.HealthChecks.MySql" Version="3.1.1" />

HealthChecks.UI.Core.HostedService.HealthCheckReportCollector: Error: GetHealthReport threw an exception when trying to get report from ~/hc configured with name app.

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.
   at System.Net.Security.SslStream.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, ExceptionDispatchInfo exception)
   at System.Net.Security.SslStream.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslStream.PartialFrameCallback(AsyncProtocolRequest asyncRequest)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Security.SslStream.EndProcessAuthentication(IAsyncResult result)
   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)
   at System.Net.Security.SslStream.<>c.<AuthenticateAsClientAsync>b__65_1(IAsyncResult iar)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean allowHttp2, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.GetHttpConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at Microsoft.Extensions.Http.Logging.LoggingHttpMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at Microsoft.Extensions.Http.Logging.LoggingScopeHttpMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
   at HealthChecks.UI.Core.HostedService.HealthCheckReportCollector.GetHealthReport(HealthCheckConfiguration configuration)

Answer 1

我希望您已经找到解决方案。但由于这个问题仍然没有得到解答，而且这也是我遇到的问题，我将发布我是如何解决它的，希望将来能帮助其他人。谢谢你。

public void ConfigureServices(IServiceCollection services)
{
    services.AddHealthChecks()
            .AddCheck("Products", new SqlServerHealthCheck(connectionString))
            .AddSqlServer(connectionString, name: "DataBase");
            
    services.AddHealthChecksUI(setup =>
    {
        setup.UseApiEndpointHttpMessageHandler(sp =>
        {
            return new HttpClientHandler
            {
                ClientCertificateOptions = ClientCertificateOption.Manual,
                ServerCertificateCustomValidationCallback = (httpRequestMessage, cert, cetChain, policyErrors) => { return true; }
            };
        });
    }).AddInMemoryStorage();
}        

public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IApiVersionDescriptionProvider provider)
{
    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
        endpoints.MapHealthChecks("/api/hc", new HealthCheckOptions
        {
            Predicate = _ => true,
            ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
        });
        endpoints.MapHealthChecksUI();
        
    });
}

Answer 2

本地开发时遇到如下错误：“无法建立SSL连接。”

经过一番研究，我在 Stack Overflow 上找到了 Omer 提供的一个有用的解决方案（此处链接：Omer 的回答）。

这是对我有用的命令序列：

dotnet user-secrets clear
dotnet dev-certs https --clean
dotnet dev-certs https
dotnet dev-certs https --check --trust

这为我解决了这个问题。我希望它可以帮助其他面临同样问题的人！

最好的，

加布里埃尔·贡萨尔维斯·达席尔瓦