Nlog: Cant log to file on Linux

[maxima120]

I have asp.net core app. I deployed it to Linux (CentOS 8) but I cant make it work (it works fine on my dev machine on Windows).

NLog is 4.9.3

dotnet --info
.NET SDK (reflecting any global.json):
Version: 5.0.100
Commit: 5044b93829

Runtime Environment:
OS Name: centos
OS Version: 8
OS Platform: Linux
RID: centos.8-x64
Base Path: /usr/share/dotnet/sdk/5.0.100/

Host (useful for support):
Version: 5.0.0
Commit: cf258a14b7

.NET SDKs installed:
5.0.100 [/usr/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 5.0.0 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 5.0.0 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

NLog.Config (I tried different paths for filename eg /var/log/myapp and ~ - nothing works)

<?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">
  <extensions>
    <add assembly="NLog.Web.AspNetCore"/>
  </extensions>
  <targets>
    <target name="logfile" xsi:type="File" fileName="./log-${shortdate}.log" />
  </targets>
  <rules>
    <logger name="*" minlevel="Trace" writeTo="logfile" />
  </rules>
</nlog>

My Program.cs:

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
                })
                .UseNLog()
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });

appsettings.json

  "Logging": {
    "LogLevel": {
      "Default": "Trace",
      "Microsoft": "Trace",
      "Microsoft.Hosting.Lifetime": "Trace"
    }
    },

[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]

Please try and enable the NLog InternalLogger at runtime like this:

```c#
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureLogging(logging =>
{
// enable NLog internal logging for troubleshooting
NLog.Common.InternalLogger.LogToConsole = true;
NLog.Common.InternalLogger.LogFile = "/home/nlog-internal.txt";
NLog.Common.InternalLogger.LogLevel = LogLevel.Debug;

                logging.ClearProviders();
                logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
            })
            .UseNLog()
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            });

```

And check the output for clues: 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)

[maxima120]

I changed config name to all small caps nlog.config and put full path for the log file location and it started to work. Thank you

[snakefoot]

NLog will automatically load "NLog.config" and "nlog.config", but I guess it will fail when using "Nlog.Config"