通过调用“IServiceCollection.AddHealthChecks”添加所有必需的服务

Posted 2023-04-12

【中文标题】通过调用“IServiceCollection.AddHealthChecks”添加所有必需的服务

【英文标题】：add all the required services by calling 'IServiceCollection.AddHealthChecks'

【发布时间】：2020-02-02 07:27:37

【问题描述】：

我正在使用 ASP.NET Core 3、.NET Core 3.0.100、Visual Studio 2019 社区。我遵循本指南https://docs.microsoft.com/en-us/aspnet/core/release-notes/aspnetcore-3.0?view=aspnetcore-3.0#health-checks

在Startup.cs，我添加endpoints.MapHealthChecks("/health");

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
                 

            if (env.IsDevelopment())
            
                app.UseDeveloperExceptionPage();
                app.UseDatabaseErrorPage();
            
            else
            
                app.UseExceptionHandler("/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            
                endpoints.MapControllers();
                endpoints.MapRazorPages();
                endpoints.MapBlazorHub();
                endpoints.MapFallbackToPage("/_Host");
                endpoints.MapHealthChecks("/health");
            );
        
    

错误

System.InvalidOperationException
  HResult=0x80131509
  Message=Unable to find the required services. Please add all the required services by calling 'IServiceCollection.AddHealthChecks' inside the call to 'ConfigureServices(...)' in the application startup code.
  Source=Microsoft.AspNetCore.Diagnostics.HealthChecks
  StackTrace:
   at Microsoft.AspNetCore.Builder.HealthCheckEndpointRouteBuilderExtensions.MapHealthChecksCore(IEndpointRouteBuilder endpoints, String pattern, HealthCheckOptions options)
   at Microsoft.AspNetCore.Builder.HealthCheckEndpointRouteBuilderExtensions.MapHealthChecks(IEndpointRouteBuilder endpoints, String pattern)
   at foo.Startup.<>c.<Configure>b__5_0(IEndpointRouteBuilder endpoints) in C:\Users\donhuvy\Desktop\acc133b3\acc133blazor\Startup.cs:line 104
   at Microsoft.AspNetCore.Builder.EndpointRoutingApplicationBuilderExtensions.UseEndpoints(IApplicationBuilder builder, Action`1 configure)
   at foo.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env) in C:\Users\donhuvy\Desktop\acc133b3\acc133blazor\Startup.cs:line 98
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.<UseStartup>b__2(IApplicationBuilder app)
   at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
   at Microsoft.AspNetCore.Server.IIS.Core.IISServerSetupFilter.<>c__DisplayClass2_0.<Configure>b__0(IApplicationBuilder app)
   at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
   at Microsoft.AspNetCore.Hosting.GenericWebHostService.<StartAsync>d__31.MoveNext()

如何解决？

【问题讨论】：

当我不小心从 Startup.cs 中删除了一行时，我收到了这个；)

【参考方案1】：

异常消息清楚地表明您应该在ConfigureServices(IServiceCollection services) 内调用services.AddHealthChecks()

请通过在应用程序启动代码中对“ConfigureServices(...)”的调用中调用“IServiceCollection.AddHealthChecks”来添加所有必需的服务。

void ConfigureServices(IServiceCollection services) 

    //...

    services.AddHealthChecks();

    //...

参考Health checks in ASP.NET Core

【讨论】：

好答案。只看到了一半的解决方案

【参考方案2】：

您很可能忘记添加到 ConfigureServices：

services.AddMvc();