ASP.NET Core日志记录不适用于生产环境

Question

事实证明，该问题与NLogASP.NET日志记录系统无关。日志配置正确，但是Debug由于配置错误，构建服务器正在将构建发布到生产中。

我试图在我的ASP.NET Core 2.0（SDK 2.1.401）项目中设置第三方记录器。到目前为止，我曾尝试Serilog和NLog。但是我对两个都有同样的问题。总结一下问题，

• 当我运行该应用程序时，它可以按预期工作dotnet run（例如，在Development环境中）
• 但是当我运行二进制文件时dotnet MyApplication.dll（即在Production环境中）却没有。
• 我的文件中没有"Logging"为Development环境部分定义任何内容appsettings.Development.json。

下面描述的问题是针对的NLog。我尝试过SeriLog并遇到相同的问题。

这是来自的相关部分 Program.cs

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .UseApplicationInsights()
        .UseStartup<Startup>()
        .ConfigureLogging((env, logging) =>
        {
            logging.ClearProviders();
            logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
        })
        .UseNLog()
        .Build();

注意我已经清除了所有提供程序并添加NLog了nlog.config文件定义：

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .UseApplicationInsights()
        .UseStartup<Startup>()
        .ConfigureLogging((env, logging) =>
        {
            logging.ClearProviders();
            logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
        })
        .UseNLog()
        .Build();

在Development模式下运行时，我看到的日志与预期的完全一样

$ dotnet run
Using launch settings from .. /Properties/launchSettings.json...
2018-09-16 19:04:39.7585||DEBUG|My.WebApp.Program|init main |url: |action:
Hosting environment: Development
Content root path: /Users/ ...
Now listening on: http://localhost:61638
Application started. Press Ctrl+C to shut down.
2018-09-16 19:04:46.5405|1|INFO|Microsoft.AspNetCore.Hosting.Internal.WebHost|Request starting HTTP/1.1 GET http://localhost:61638/api/_doc   |url: http://localhost/api/_doc|action:
2018-09-16 19:04:46.7381|1|INFO|Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker|Executing action method My.WebApp.RestApi.Doc (My.WebApp) with arguments ((null)) - ModelState is Valid |url: http://localhost/api/_doc|action: Doc

但是，当我在Production启动状态下运行该应用程序时，控制台输出看起来好像我还没有NLog安装，也没有清除默认提供程序。

dotnet .\My.WebApp.dll
Hosting environment: Production
Content root path: C:\inetpub\wwwroot\myapp\wwwroot
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:5000/
info: Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[1]
      Executing action method My.WebApp.Controllers.HomeController.Index (My.WebApp) with arguments ((null)) - ModelState is Valid

注意那些行以info:？开头 这些是使用中定义的默认日志记录设置时获得的标准控制台日志记录格式Microsoft.Extensions.Logging。但我绝对清除Console致电供应商logging.ClearProviders();中Program.cs的文件。

谢谢你的帮助。

Answer 1

I was able to reproduce your problem and fix it. Please find my configuration here.

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Trace",
      "Microsoft": "Information"
    }
  },
  "AllowedHosts": "*"
}

nlog.config

{
  "Logging": {
    "LogLevel": {
      "Default": "Trace",
      "Microsoft": "Information"
    }
  },
  "AllowedHosts": "*"
}

Program.cs

public class Program
{
    public static void Main(string[] args)
    {
        var logger = NLogBuilder.ConfigureNLog("nlog.config").GetCurrentClassLogger();

        try
        {
            logger.Debug("init main");
            CreateWebHostBuilder(args).Build().Run();
        }
        catch (Exception ex)
        {
            //NLog: catch setup errors
            logger.Error(ex, "Stopped program because of exception");
            throw;
        }
        finally
        {
            // Ensure to flush and stop internal timers/threads before application-exit (Avoid segmentation fault on Linux)
            NLog.LogManager.Shutdown();
        }
    }

    public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .ConfigureLogging((env, logging) =>
            {
                logging.ClearProviders();
                logging.SetMinimumLevel(LogLevel.Trace);
            })
            .UseNLog();
}

added the following entry to .csproj file

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      internalLogLevel="error"
      internalLogFile="./internal-nlog.txt">

  <extensions>
    <add assembly="NLog.Web.AspNetCore"/>
  </extensions>

  <targets>
    <target name="Console"
            xsi:type="Console"
            layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" writeTo="Console" />

    <!--Skip non-critical Microsoft logs and so log only own logs-->
    <logger name="Microsoft.*" maxLevel="Info" final="true" />
    <!-- BlackHole without writeTo -->
    <logger name="*" minlevel="Trace" writeTo="Console" />
  </rules>
</nlog>

Reference:

1. https://github.com/NLog/NLog.Web/wiki/Getting-started-with-ASP.NET-Core-2