NLog.Targets.Journald is a custom target for NLog.

It outputs systemd-journald native protocol to unix domain socket at /run/systemd/journal/socket.

It can be used with version 4.7.13 and later.

1. Add reference to NLog.Targets.Journald NuGet package in your project.
2. Modify your application configuration to load and use Journald target.

See NLog docs for more information.

<extensions>
    <add assembly="NLog.Targets.Journald"/>
</extensions>

<targets>
    <target xsi:type="Journald" name="journald">
        <!-- mandatory -->
        <layout>"${logger} ${message}"</layout>
        <!-- optional -->
        <sysLogIdentifier>my-service</sysLogIdentifier>
        <!-- optional, multiple allowed -->
        <!-- Key must consist of upper case letters, numbers and underscores only.
             It is always converted to upper case. -->
        <static-field key="KEY_1" value="value 1" />
        <static-field key="KEY_2" value="value 2" />
    </target>
</targets>

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

NLog.config is simple but complete example.

For ASP.NET Core, .NET Core, .NET5 ant later projects. See NLog.Extensions.Logging for more information.

"NLog": {
    "extensions": [
      { "assembly": "NLog.Targets.Journald" }
    ],
    "targets": {
      "journald": {
        "type": "Journald",
        "layout": "${logger} ${message}",
        "syslogIdentifier": "my-service",
        "staticFields": [ 
          { "Key": "KEY_1", "Value": "value 1" }, 
          { "Key": "KEY_2", "Value": "value 2" } 
        ],
      }
    },
    "rules": {
      "10": {
        "logger": "*",
        "minLevel": "Trace",
        "writeTo": "journald"
      }
    }
  }

NLog log events are emmited to Journald using the following fields.

More info about Journal fields.

NLog.Targets.Journald is licensed under the terms of MIT license.

Please see the LICENSE file for further information.

Unix domain socket support is implemented using UnixEndPoint class from Mono platform library.