ASP.NET Core 3.1 - 运行状况检查 UI 不起作用

Question

我开发了一个带有自定义健康检查的 ASP.NET Core 3.1 MVC 应用程序。如下图所示，它工作得很好。

但是，UI 始终为空，因为 /health-api 始终返回空数组。

它位于 ASP.NET 3.1 Core 应用程序中，可以位于https://github.com/prawin2k/HealhCheckMVC/tree/master/HealhCheckMVC

.NET Core 版本 - 3.1 (MVC) Healthchecks 版本 - 最新操作系统：Windows Server 2016 其他：Visual Studio 2019

Answer 1

就我而言，运行状况检查 UI 本身不会启动和崩溃 .net core 3.1 Web API 应用程序。

错误消息： 无法构造某些服务（验证服务描述符“ServiceType：HealthChecks.UI.Core.Notifications.IHealthCheckFailureNotifier Lifetime：Scoped ImplementType：HealthChecks.UI.Core.Notifications.WebHookFailureNotifier”时出错：无法解析服务对于类型“HealthChecks.UI.Core.Data.HealthChecksDb”，同时尝试激活“HealthChecks.UI.Core.Notifications.WebHookFailureNotifier”。）

修复：添加任何UI 存储提供程序。就我而言，我选择了AddInMemoryStorage()

启动.cs

public void ConfigureServices(IServiceCollection services)
{
    ...
    
    services.AddHealthChecks() 
        .AddDbContextCheck<PollDbContext>() //nuget: Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore
        .AddApplicationInsightsPublisher(); //nuget: AspNetCore.HealthChecks.Publisher.ApplicationInsights

    services.AddHealthChecksUI() //nuget: AspNetCore.HealthChecks.UI
        .AddInMemoryStorage(); //nuget: AspNetCore.HealthChecks.UI.InMemory.Storage
        
    ...
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    ...
    
    app.UseHealthChecks("/healthcheck", new HealthCheckOptions
    {
        Predicate = _ => true,
        ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse //nuget: AspNetCore.HealthChecks.UI.Client
    });
    
    //nuget: AspNetCore.HealthChecks.UI
    app.UseHealthChecksUI(options =>
    {
        options.UIPath = "/healthchecks-ui";
        options.ApiPath = "/health-ui-api";
    });
    ...
}

应用程序设置.json

"HealthChecks-UI": {
    "DisableMigrations": true,
    "HealthChecks": [
        {
            "Name": "PollManager",
            "Uri": "/healthcheck"
        }
    ],
    "Webhooks": [
        {
            "Name": "",
            "Uri": "",
            "Payload": "",
            "RestoredPayload": ""
        }
    ],
    "EvaluationTimeOnSeconds": 10,
    "MinimumSecondsBetweenFailureNotifications": 60,
    "MaximumExecutionHistoriesPerEndpoint": 15
}