Nlog: Nlog.Config 4.6.8 is not work in linux by publishing with single file(service)

[longskikondi]

hi Nlog developers,

I published my NetCore 3.1 Web API Service in Linux with single file(service)
and set Nlog 4.6.8 for this:

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      throwExceptions="true"
      internalLogLevel="Error" internalLogFile="${basedir}/../logs/logfail.txt">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f1" fileName="${basedir:fixtempdir=true}/../logs/Normal/${shortdate}.txt"
           layout="${longdate} ${newline} ${uppercase:${level}} ${message} ${newline}" />
    <target xsi:type="File" name="f2" fileName="${basedir:fixtempdir=true}/../logs/Error/${shortdate}.txt"
           layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f3" fileName="${basedir:fixtempdir=true}/../logs/Fatal/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f4" fileName="${basedir:fixtempdir=true}/../logs/Info/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" maxlevel="Warn" writeTo="f1" />
    <logger name="*" level="Error" writeTo="f2" />
    <logger name="*" level="Fatal" writeTo="f3" />
    <logger name="*" level="Info" writeTo="f4" />
  </rules>
</nlog>

and I read some same issues and changed this from ${BaseDir} to ${BaseDir:FixTempDir=true},but it is still not work...

by the way, before I set Single file, it always worked in linux.
please help me to solve this issue
thanks :)

[welcome[bot]]

Hi! Thanks for opening your first issue here! Please make sure to follow the issue template - so we could help you better!

[snakefoot]

Think you forgot the most important part from the issue-template.

You need to include the output from NLog InternalLogger on Debug-Level: https://github.com/NLog/NLog/wiki/Internal-Logging

[repo-ranger[bot]]

Please add the requested info, so we could help you better! (This issue will be closed in 7 days)

[snakefoot]

@longskikondi Can you try this configuration. And attach contents of ${currentdir}/../logs/nlog-internal.txt to this issue?

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      internalLogLevel="Debug"
      internalLogFile="${currentdir}/../logs/nlog-internal.txt">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f1" fileName="${basedir:fixtempdir=true}/../logs/Normal/${shortdate}.txt"
           layout="${longdate} ${newline} ${uppercase:${level}} ${message} ${newline}" />
    <target xsi:type="File" name="f2" fileName="${basedir:fixtempdir=true}/../logs/Error/${shortdate}.txt"
           layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f3" fileName="${basedir:fixtempdir=true}/../logs/Fatal/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f4" fileName="${basedir:fixtempdir=true}/../logs/Info/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" maxlevel="Warn" writeTo="f1" />
    <logger name="*" level="Error" writeTo="f2" />
    <logger name="*" level="Fatal" writeTo="f3" />
    <logger name="*" level="Info" writeTo="f4" />
  </rules>
</nlog>

[longskikondi]

@longskikondi Can you try this configuration. And attach contents of ${currentdir}/../logs/nlog-internal.txt to this issue?

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      internalLogLevel="Debug"
      internalLogFile="${currentdir}/../logs/nlog-internal.txt">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f1" fileName="${basedir:fixtempdir=true}/../logs/Normal/${shortdate}.txt"
           layout="${longdate} ${newline} ${uppercase:${level}} ${message} ${newline}" />
    <target xsi:type="File" name="f2" fileName="${basedir:fixtempdir=true}/../logs/Error/${shortdate}.txt"
           layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f3" fileName="${basedir:fixtempdir=true}/../logs/Fatal/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f4" fileName="${basedir:fixtempdir=true}/../logs/Info/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" maxlevel="Warn" writeTo="f1" />
    <logger name="*" level="Error" writeTo="f2" />
    <logger name="*" level="Fatal" writeTo="f3" />
    <logger name="*" level="Info" writeTo="f4" />
  </rules>
</nlog>

yes I replaced it in config ,and reload linux again..it is still not work..in linux
but I can got logs in project debug folder at [localhost] windows 10....

[snakefoot]

If you cannot provide us with the NLog-internal.txt file then we cannot help you (Maybe use absolute path, or enable from code). Sorry

[304NotModified]

Will reopen if there is an internal log

[longskikondi]

sorry for my late response..
I replace it as internalLogFile="${currentdir}/../logs/nlog-internal.txt
I stll not found log or nlog-internal.txt in my app folder or other log folder.

<?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"
      throwExceptions="true"
      internalLogLevel="Debug" internalLogFile="${currentdir}/../logs/nlog-internal.txt">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f1" fileName="${basedir:fixtempdir=true}/../logs/Normal/${shortdate}.txt"
           layout="${longdate} ${newline} ${uppercase:${level}} ${message} ${newline}" />
    <target xsi:type="File" name="f2" fileName="${basedir:fixtempdir=true}/../logs/Error/${shortdate}.txt"
           layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f3" fileName="${basedir:fixtempdir=true}/../logs/Fatal/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f4" fileName="${basedir:fixtempdir=true}/../logs/Info/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" maxlevel="Warn" writeTo="f1" />
    <logger name="*" level="Error" writeTo="f2" />
    <logger name="*" level="Fatal" writeTo="f3" />
    <logger name="*" level="Info" writeTo="f4" />
  </rules>
</nlog>

[snakefoot]

@longskikondi Think you have to configure the Internal Logger in code at runtime, to an absolute path, where your application has permissions to file-write. Like this:

```c#
class Program
{
// Make sure to comment out static Logger-objects, or else InternalLogger will not work
// readonly static Logger = LogManager.GetCurrentClassLogger();

static void Main()
{
    NLog.Common.InternalLogger.LogLevel = LogLevel.Debug;
    NLog.Common.InternalLogger.LogToConsole = true;
    NLog.Common.InternalLogger.LogFile = "C:\\Temp\\NLog.Internal.txt";
    Logger logger = LogManager.GetLogger("foo");
    logger.Info("Program started");
    LogManager.Shutdown();  // Remember to flush
}

}
```

See also: https://github.com/NLog/NLog/wiki/Logging-troubleshooting

[longskikondi]

public static void Main()
        {
            IConfigurationRoot config = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                  .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
                  .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT")}.json", optional: true, reloadOnChange: true)
                  .AddJsonFile("ErrorMessage.json", optional: false, reloadOnChange: true)
                .Build();

            NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
            NLog.Common.InternalLogger.LogToConsole = true;
            NLog.Common.InternalLogger.LogFile ="${currentdir}\\..\\logs\\nlog-internal.txt";
            Logger logger = LogManager.GetLogger("foo");
            logger.Info("Program started");

            LogManager.Shutdown();  // Remember to flush

            var host = new WebHostBuilder()
                .UseKestrel()
                .UseConfiguration(config)
                .UseContentRoot(Directory.GetCurrentDirectory())
                .UseStartup<Startup>().UseNLog()
                .Build();

            host.Run();
        }

I replaced this and reloaded app in linux again, still no log or nlog-internal.txt.
NLog.Common.InternalLogger.LogFile ="${currentdir}\..\logs\nlog-internal.txt"; is it correct for log path in linux?

[snakefoot]

I want you to stop using relative paths, because they are not working for you (Don't use ${currentdir} or anything like that for InternalLogger.LogFile)

Instead you should provide an absolute path to a directory where your application has write-permissions.

Sorry I can not tell you the absolute path where your application has write access. You have to find it yourself.

[longskikondi]

I want you to stop using relative paths, because they are not working for you (Don't use ${currentdir} or anything like that for InternalLogger.LogFile)

Instead you should provide an absolute path to a directory where your application has write-permissions.

Sorry I can not tell you the absolute path where your application has write access. You have to find it yourself.

hi
I used this
NLog.Common.InternalLogger.LogFile ="nlog-internal.txt"; in Main
and nlog-internal.txt created in my project app(the single file) folder
and the context is :

2020-04-23 16:45:35.2180 Debug Loading config from /var/tmp/.net/MyProject.Service/xm3unjqp.2b1/NLog.config
2020-04-23 16:45:35.3027 Info Configuring from an XML element in /var/tmp/.net/MyProject.Service/xm3unjqp.2b1/NLog.config...

[snakefoot]

Excellent. Lets try this then:

c# NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug; NLog.Common.InternalLogger.LogToConsole = true; NLog.Common.InternalLogger.LogFile ="nlog-internal.txt"; Logger logger = LogManager.GetLogger("foo"); logger.Info("Program started"); NLog.Common.InternalLogger.Info("TempPath=" + System.IO.Path.GetTempPath()); NLog.Common.InternalLogger.Info("ProcessPath=" + System.Diagnostic.Process.GetCurrentProcess()?.MainModule.FileName); NLog.Common.InternalLogger.Info("AppDomainPath=" + System.AppDomain.CurrentDomain.BaseDirectory);

And show the output from you machine.

[longskikondi]

Excellent. Lets try this then:

            NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
            NLog.Common.InternalLogger.LogToConsole = true;
            NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";
            Logger logger = LogManager.GetLogger("foo");
            logger.Info("Program started");
            NLog.Common.InternalLogger.Info("TempPath=" + System.IO.Path.GetTempPath());
            NLog.Common.InternalLogger.Info("ProcessPath=" + 
System.Diagnostic.Process.GetCurrentProcess()?.MainModule.FileName);
            NLog.Common.InternalLogger.Info("AppDomainPath=" + System.AppDomain.CurrentDomain.BaseDirectory);

And show the output from you machine.

I found that it would create nlog-internal.txt but didn't wirte any path logs even "Program started"
whatever I run app at windows or linux docker ,it just show

2020-04-23 18:05:14.9844 Debug Loading config from C:\Users\user01\Desktop\PudoService\src\Continental.Pudo.Service\bin\Debug\netcoreapp3.1\NLog.config
2020-04-23 18:05:15.2295 Info Configuring from an XML element in C:\Users\user01\Desktop\PudoService\src\Continental.Pudo.Service\bin\Debug\netcoreapp3.1\NLog.config...

[snakefoot]

Well "Program Started" will not be written to nlog-internal.txt. It will be written to standard NLog Targets according to your NLog-rules. It is only done to initialize the Logger-object, as it triggers loading of NLog.config.

Can you fix your NLog.config file so it becomes like this (Think the loading of Nlog.config reverts your configuration of InternalLogger):

internalLogLevel="Debug" internalLogFile="nlog-internal.txt">

Btw. can you move this line:

LogManager.Shutdown(); // Remember to flush

To under this line:

c# host.Run(); LogManager.Shutdown(); // Remember to flush

[snakefoot]

Change the code to be like this (Move the path-logging up, so it happens before loading Nlog.config):

```c#
NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
NLog.Common.InternalLogger.LogToConsole = true;
NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";
NLog.Common.InternalLogger.Info("TempPath=" + System.IO.Path.GetTempPath());
NLog.Common.InternalLogger.Info("ProcessPath=" +
System.Diagnostic.Process.GetCurrentProcess()?.MainModule.FileName);
NLog.Common.InternalLogger.Info("AppDomainPath=" + System.AppDomain.CurrentDomain.BaseDirectory);

        Logger logger = LogManager.GetLogger("foo");
        logger.Info("Program started");

```

[longskikondi]

Change the code to be like this (Move the path-logging up, so it happens before loading Nlog.config):

            NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
            NLog.Common.InternalLogger.LogToConsole = true;
            NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";
            NLog.Common.InternalLogger.Info("TempPath=" + System.IO.Path.GetTempPath());
            NLog.Common.InternalLogger.Info("ProcessPath=" + 
System.Diagnostic.Process.GetCurrentProcess()?.MainModule.FileName);
            NLog.Common.InternalLogger.Info("AppDomainPath=" + System.AppDomain.CurrentDomain.BaseDirectory);

            Logger logger = LogManager.GetLogger("foo");
            logger.Info("Program started");

here it is

2020-04-23 18:42:39.3366 Info TempPath=/tmp/
2020-04-23 18:42:39.3711 Info ProcessPath=/app/MyProject.Service
2020-04-23 18:42:39.3711 Info AppDomainPath=/var/tmp/.net/MyProject.Service/rj23jfcy.nes/
2020-04-23 18:42:39.3869 Debug Loading config from /var/tmp/.net/MyProject.Service/rj23jfcy.nes/NLog.config
2020-04-23 18:42:39.4554 Info Configuring from an XML element in /var/tmp/.net/MyProject.Service/rj23jfcy.nes/NLog.config...

[snakefoot]

So the problem is this:

• TempPath=/tmp/
• AppDomainPath=/var/tmp/.net/MyProject.Service/rj23jfcy.nes/

Because AppDomainPath has the /var/-prefix then it is not recognized as being in the official temp-folder. Curious if one can get the /var/tmp/-path with a C# method-call.

[snakefoot]

Found this: https://unix.stackexchange.com/questions/30489/what-is-the-difference-between-tmp-and-var-tmp

[snakefoot]

Guess one could be evil, and have a fallback so if path begins with /tmp/ or /var/tmp then it is also seen as temp-folder.

[snakefoot]

Can you try this for me:

```c#
NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
NLog.Common.InternalLogger.LogToConsole = true;
NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";
NLog.Common.InternalLogger.Info("TempPath=" + System.IO.Path.GetTempPath());
NLog.Common.InternalLogger.Info("ProcessPath=" + System.Diagnostic.Process.GetCurrentProcess()?.MainModule.FileName);
NLog.Common.InternalLogger.Info("AppDomainPath=" + System.AppDomain.CurrentDomain.BaseDirectory);
NLog.Common.InternalLogger.Info("TMPDIR=" + Environment.GetEnvironmentVariable("TMPDIR"));
NLog.Common.InternalLogger.Info("TEMP=" + Environment.GetEnvironmentVariable("TEMP"));
NLog.Common.InternalLogger.Info("TMP=" + Environment.GetEnvironmentVariable("TMP"));
NLog.Common.InternalLogger.Info("TempFolder=" + Environment.GetEnvironmentVariable("TempFolder"));

Logger logger = LogManager.GetLogger("foo");
logger.Info("Program started");
```

[longskikondi]

Can you try this for me:

NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
NLog.Common.InternalLogger.LogToConsole = true;
NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";
NLog.Common.InternalLogger.Info("TempPath=" + System.IO.Path.GetTempPath());
NLog.Common.InternalLogger.Info("ProcessPath=" + System.Diagnostic.Process.GetCurrentProcess()?.MainModule.FileName);
NLog.Common.InternalLogger.Info("AppDomainPath=" + System.AppDomain.CurrentDomain.BaseDirectory);
NLog.Common.InternalLogger.Info("TMPDIR=" + Environment.GetEnvironmentVariable("TMPDIR"));
NLog.Common.InternalLogger.Info("TEMP=" + Environment.GetEnvironmentVariable("TEMP"));
NLog.Common.InternalLogger.Info("TMP=" + Environment.GetEnvironmentVariable("TMP"));
NLog.Common.InternalLogger.Info("TempFolder=" + Environment.GetEnvironmentVariable("TempFolder"));

Logger logger = LogManager.GetLogger("foo");
logger.Info("Program started");

here it is

2020-04-24 10:50:49.3624 Info TempPath=/tmp/
2020-04-24 10:50:49.3939 Info ProcessPath=/app/MyProject.Service
2020-04-24 10:50:49.3939 Info AppDomainPath=/var/tmp/.net/MyProject.Service/ciuox5cw.zxo/
2020-04-24 10:50:49.3942 Info TMPDIR=
2020-04-24 10:50:49.3942 Info TEMP=
2020-04-24 10:50:49.3942 Info TMP=
2020-04-24 10:50:49.3942 Info TempFolder=
2020-04-24 10:50:49.4096 Debug Loading config from /var/tmp/.net/MyProject.Service/ciuox5cw.zxo/NLog.config
2020-04-24 10:50:49.4768 Info Configuring from an XML element in /var/tmp/.net/MyProject.Service/ciuox5cw.zxo/NLog.config...

btw I published my app into linux with container,is it maybe occurred this problem?

[snakefoot]

The problem is that your container on Linux doesn't have the TMPDIR environment-variable defined:

TMPDIR=/var/tmp/

But still think that NLog should handle this situation, since it will probably be common scenario. See also #3921

[snakefoot]

@longskikondi Thank you so much for being persistent and patient. NLog 4.7.1 will fix this issue.

But while waiting for the release, then you can try and setup the TMPDIR-environment-variable for your container.

[longskikondi]

@longskikondi Thank you so much for being persistent and patient. NLog 4.7.1 will fix this issue.

But while waiting for the release, then you can try and setup the TMPDIR-environment-variable for your container.

sorry for my late response and I m glad to help you for this issue.

[snakefoot]

@longskikondi It would be a great help if you could confirm that this pre-release-build resolves your issue:

https://ci.appveyor.com/project/nlog/nlog/builds/32424589/artifacts

Just download NLog.4.7.0.11607-PR3921.nupkg (from above link) and place in a local nuget-folder-repository. Then you should see that fixtempdir=true also works in your Linux Container (without having TMPDIR configured).

[longskikondi]

cause of weekends, sorry for my late response.

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="AutoMapper" Version="9.0.0" />
    <PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.7" />
    <PackageReference Include="Microsoft.AspNetCore.DataProtection" Version="3.1.0" />
    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.0" />
    <PackageReference Include="NLog" Version="4.7.0.11607-PR3921" />
  </ItemGroup>
</Project>

I placed it in service and logging project and reload my app
it is exactly not work (no info or normal log there..

this is the 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"
      throwExceptions="true"
      internalLogLevel="Debug" internalLogFile="${basedir:fixtempdir=true}/../logs/logfail.txt">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f1" fileName="${basedir:fixtempdir=true}/../logs/Normal/${shortdate}.txt"
           layout="${longdate} ${newline} ${uppercase:${level}} ${message} ${newline}" />
    <target xsi:type="File" name="f2" fileName="${basedir:fixtempdir=true}/../logs/Error/${shortdate}.txt"
           layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f3" fileName="${basedir:fixtempdir=true}/../logs/Fatal/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f4" fileName="${basedir:fixtempdir=true}/../logs/Info/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" maxlevel="Warn" writeTo="f1" />
    <logger name="*" level="Error" writeTo="f2" />
    <logger name="*" level="Fatal" writeTo="f3" />
    <logger name="*" level="Info" writeTo="f4" />
  </rules>
</nlog>

[snakefoot]

Thank you for the test. Can you change the NLog.config to this (Updated internalLogFile):

<?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"
      throwConfigExceptions="true"
      internalLogLevel="Debug" internalLogFile="logfail.txt">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f1" fileName="${basedir:fixtempdir=true}/../logs/Normal/${shortdate}.txt"
           layout="${longdate} ${newline} ${uppercase:${level}} ${message} ${newline}" />
    <target xsi:type="File" name="f2" fileName="${basedir:fixtempdir=true}/../logs/Error/${shortdate}.txt"
           layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f3" fileName="${basedir:fixtempdir=true}/../logs/Fatal/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f4" fileName="${basedir:fixtempdir=true}/../logs/Info/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" maxlevel="Warn" writeTo="f1" />
    <logger name="*" level="Error" writeTo="f2" />
    <logger name="*" level="Fatal" writeTo="f3" />
    <logger name="*" level="Info" writeTo="f4" />
  </rules>
</nlog>

And show the output written to logfail.txt (Should be next to your exe-file)

[longskikondi]

Thank you for the test. Can you change the NLog.config to this (Updated internalLogFile):

<?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"
      throwConfigExceptions="true"
      internalLogLevel="Debug" internalLogFile="logfail.txt">

  <!-- optional, add some variables
  https://github.com/nlog/NLog/wiki/Configuration-file#variables
  -->
  <variable name="myvar" value="myvalue"/>
  <targets>
    <target xsi:type="File" name="f1" fileName="${basedir:fixtempdir=true}/../logs/Normal/${shortdate}.txt"
           layout="${longdate} ${newline} ${uppercase:${level}} ${message} ${newline}" />
    <target xsi:type="File" name="f2" fileName="${basedir:fixtempdir=true}/../logs/Error/${shortdate}.txt"
           layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f3" fileName="${basedir:fixtempdir=true}/../logs/Fatal/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
    <target xsi:type="File" name="f4" fileName="${basedir:fixtempdir=true}/../logs/Info/${shortdate}.txt"
          layout="${longdate} ${newline} ${message} ${newline}" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" maxlevel="Warn" writeTo="f1" />
    <logger name="*" level="Error" writeTo="f2" />
    <logger name="*" level="Fatal" writeTo="f3" />
    <logger name="*" level="Info" writeTo="f4" />
  </rules>
</nlog>

And show the output written to logfail.txt (Should be next to your exe-file)

I replaced it with old config and my program.cs have no any Nlog settings(before ur code I followed)
there is no any internalLogFile after I reload my app

[snakefoot]

Really strange. Since internalLogFile="logfail.txt" (without path) should match what you did here:

NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
NLog.Common.InternalLogger.LogToConsole = true;
NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";

I think you have more than one NLog.config file, and you are changing the one that is not being loaded.

Can you do this in your startup:

            NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
            NLog.Common.InternalLogger.LogToConsole = true;
            NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";
            NLog.Common.InternalLogger.Info("TempPath=" + System.IO.Path.GetTempPath());
            NLog.Common.InternalLogger.Info("ProcessPath=" + 
System.Diagnostic.Process.GetCurrentProcess()?.MainModule.FileName);
            NLog.Common.InternalLogger.Info("AppDomainPath=" + System.AppDomain.CurrentDomain.BaseDirectory);

            Logger logger = LogManager.GetLogger("foo");
            logger.Info("Program started");

            var oldLogFile = NLog.Common.InternalLogger.LogFile;
            NLog.Common.InternalLogger.LogLevel = NLog.LogLevel.Debug;
            NLog.Common.InternalLogger.LogToConsole = true;
            NLog.Common.InternalLogger.LogFile ="nlog-internal.txt";
            NLog.Common.InternalLogger.Info("NLogConfigLogFile=" + oldLogFile);

And provide what output you get for "NLogConfigLogFile=" ?

[longskikondi]

I get the output file: nlog-internal.txt at my app folder
and the output is:

2020-04-30 11:11:38.3804 Info TempPath=/tmp/
2020-04-30 11:11:38.4102 Info ProcessPath=/app/MyProject.Service
2020-04-30 11:11:38.4102 Info AppDomainPath=/var/tmp/.net/MyProject.Service/dld2zutm.vbb/
2020-04-30 11:11:38.4260 Debug Loading config from /var/tmp/.net/MyProject.Service/dld2zutm.vbb/NLog.config
2020-04-30 11:11:38.4943 Info Configuring from an XML element in /var/tmp/.net/MyProject.Service/dld2zutm.vbb/NLog.config...
2020-04-30 11:11:38.6909 Info NLogConfigLogFile=c:\temp\nlog-internal.log
2020-04-30 11:11:38.7610 Debug ScanAssembly('NLog.Web.AspNetCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c')
2020-04-30 11:11:38.9055 Debug Hide assemblies for callsite
2020-04-30 11:11:38.9273 Debug Targets not configured for logger: Microsoft.AspNetCore.Hosting.WebHost
2020-04-30 11:11:38.9508 Debug Targets not configured for logger: Microsoft.AspNetCore.Hosting.Diagnostics
2020-04-30 11:11:38.9589 Debug Targets not configured for logger: Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets
2020-04-30 11:11:38.9644 Debug Targets not configured for logger: Microsoft.AspNetCore.Server.Kestrel
2020-04-30 11:11:38.9855 Debug Targets not configured for logger: Microsoft.AspNetCore.Mvc.MvcOptions
2020-04-30 11:11:38.9955 Debug Targets not configured for logger: Microsoft.AspNetCore.Mvc.Formatters.SystemTextJsonInputFormatter
2020-04-30 11:11:39.2159 Debug Targets not configured for logger: Microsoft.AspNetCore.Routing.EndpointMiddleware
2020-04-30 11:11:39.2159 Debug Targets not configured for logger: Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware
2020-04-30 11:11:39.2206 Debug Targets not configured for logger: Microsoft.AspNetCore.HttpsPolicy.HttpsRedirectionMiddleware
2020-04-30 11:11:39.2206 Debug Targets not configured for logger: Microsoft.AspNetCore.Hosting.ApplicationLifetime
2020-04-30 11:11:39.2206 Debug Targets not configured for logger: Microsoft.AspNetCore.Hosting.HostedServiceExecutor
2020-04-30 11:11:39.2206 Debug Targets not configured for logger: Coravel.Scheduling.HostedService.SchedulerHost
2020-04-30 11:12:00.4070 Debug Targets not configured for logger: Microsoft.Extensions.Caching.Memory.MemoryCache
2020-04-30 11:12:00.4675 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Infrastructure
2020-04-30 11:12:00.5989 Debug Targets not configured for logger: MyProject.Extensions.NLog.NlogLogger
2020-04-30 11:12:00.6128 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.ChangeTracking
2020-04-30 11:12:00.6607 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Model
2020-04-30 11:12:00.6632 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Model.Validation
2020-04-30 11:12:01.6516 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Database.Transaction
2020-04-30 11:12:01.6516 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Database.Connection
2020-04-30 11:12:01.6553 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Query
2020-04-30 11:12:01.6619 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Database.Command
2020-04-30 11:12:01.7144 Debug Targets not configured for logger: Microsoft.EntityFrameworkCore.Update

[snakefoot]

Looks like you are deployed an "empty" NLog.config with your application (no rules and no targets).

Make sure that you are not using this nuget-package:

https://www.nuget.org/packages/NLog.Config

It doesn't work well on NetCore, and can reset your NLog.config.

[longskikondi]

Looks like you are deployed an "empty" NLog.config with your application (no rules and no targets).

Make sure that you are not using this nuget-package:

https://www.nuget.org/packages/NLog.Config

It doesn't work well on NetCore, and can reset your NLog.config.

I used Nlog(4.6.7) and Nlog.config(4.6.8) when I started to develop the project,and run without single file is work. however, I used these after running with single file and the result is not work..

unfortunately , I decide to publish my app on linux by no single file for decreasing some caches.
therefore , I couldn't focus on this issue or help you soon..
thanks for helping me

[snakefoot]

therefore , I couldn't focus on this issue or help you soon. thanks for helping me

It is okay. You have helped a lot already. But if you get the time, to confirm if the provided pre-release-build resolves the issue (When not using NLog.config-nuget-package), then please tell :)

P.S. There is already a warning at https://www.nuget.org/packages/NLog.config saying:

Unfortunately this package won't work well when using <PackageReference>

I guess the "warning" could be more precise, about the nuget-package breaking application logging by unexpected reset of NLog.config file :)

[snakefoot]

Closing as resolved by #3921