ASP.NET 核心日志记录不适用于生产环境

Question

事实证明，该问题与NLog或 ASP.NET 日志记录系统无关。日志记录配置正确，但由于配置错误，生成服务器正在将Debug生成发布到生产环境。

我正在尝试在我的 ASP.NET 核心2.0(SDK2.1.401(项目中设置第三方记录器。到目前为止，我已经尝试了Serilog和NLog.但是，我对两者都有相同的问题。总结一下这个问题，

• 当我像dotnet run一样运行应用程序时，它会按预期工作(即。在Development环境中(
• 但是当我运行二进制dotnet MyApplication.dll时它不会(即。在Production环境中(。
• 我在appsettings.Development.json文件中"Logging"Development环境中没有定义任何内容。

下面描述的问题适用于NLog。我已经尝试了SeriLog并遇到了同样的问题。

这是Program.cs的相关部分

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了NLog还定义了nlog.config文件：

<?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" />
</rules>
</nlog>

在Development模式下运行时，我完全按照预期看到日志

$ 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，当我在环境中运行应用程序时Production控制台输出看起来好像我没有安装NLog并且我还没有清除默认提供程序。

dotnet .My.WebApp.dll
Hosting environment: Production
Content root path: C:inetpubwwwrootmyappwwwroot
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

请注意，这些行以info:开头？ 这些是使用Microsoft.Extensions.Logging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。但我肯定通过在Program.cs文件中调用logging.ClearProviders();来清除Console提供程序。

感谢您的任何帮助。

Answer 1

我能够重现您的问题并修复它。请在此处找到我的配置。

appsettings.json

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

nlog.config

<?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>

程序.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();
}

将以下条目添加到 .csproj 文件

<ItemGroup>
<Content Update="nlog.config">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</Content>
</ItemGroup>

参考：

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