NLog.config

<?xml version="1.0" encoding="utf-8" ?>
<!-- Modified by SignalFx -->
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <targets>
        <!-- For JsonLayout when includeMdlc=true, you do not need to do any additional work to extract the 'trace_id' and 'span_id' values (see: https://github.com/NLog/NLog/wiki/JsonLayout) -->
        <!--
            Additions to layout: none
        -->
        <target name="jsonFile-includeMdlc-true" xsi:type="File" fileName="log-NLog46-jsonFile-includeMdlc-true.log">
            <layout xsi:type="JsonLayout" includeMdlc="true">
                <attribute name="time" layout="${longdate}" />
                <attribute name="level" layout="${level:upperCase=true}"/>
                <attribute name="message" layout="${message}" />
                <attribute name="exception" layout="${exception:format=ToString}" />
            </layout>
        </target>

        <!-- For JsonLayout when includeMdlc=false, you must explicitly extract the 'trace_id' and 'span_id' values using new <attribute> nodes (see: https://github.com/NLog/NLog/wiki/JsonLayout) -->
        <!--
            Additions to layout:
            - <attribute name="trace_id" layout="${mdlc:item=trace_id}"/>
            - <attribute name="span_id" layout="${mdlc:item=span_id}"/>
        -->
        <target name="jsonFile-includeMdlc-false" xsi:type="File" fileName="log-NLog46-jsonFile-includeMdlc-false.log">
            <layout xsi:type="JsonLayout" includeMdlc="false">
                <attribute name="time" layout="${longdate}" />
                <attribute name="level" layout="${level:upperCase=true}"/>
                <attribute name="message" layout="${message}" />
                <attribute name="exception" layout="${exception:format=ToString}" />

                <!-- Manual changes: start -->
                <attribute name="trace_id" layout="${mdlc:item=trace_id}"/>
                <attribute name="span_id" layout="${mdlc:item=span_id}"/>
                <attribute name="service.name" layout="${mdlc:item=service.name}"/>
                <attribute name="deployment.environment" layout="${mdlc:item=deployment.environment}"/>
                <!-- Manual changes: end -->
            </layout>
        </target>

        <!-- For a custom layout, you must explicitly extract the 'trace_id' and 'span_id' values -->
        <!--
            Additions to layout: {traceId=&quot;${mdlc:item=trace_id}&quot;,spanId=&quot;${mdlc:item=span_id}&quot;,service=&quot;${mdlc:item=service.name}&quot;,environment=&quot;${mdlc:item=deployment.environment}&quot;}
        -->
        <!--
            Parsing this log line with a custom Pipeline that adds Trace/Log correlation can be done with the following Processors:
            1. Grok Parser: Set the parsing rules to `log_parser %{date("yyyy-MM-dd HH:mm:ss.SSSS"):time}\|%{word:level}\|%{notSpace:logger}\|\{%{data::keyvalue}}\|%{data:message}`
            2. Trace Id Remapper: Set the trace_id attribute to 'trace_id'
        -->
        <target name="textFile" xsi:type="File" fileName="log-NLog46-textFile.log"
                layout="${longdate}|${uppercase:${level}}|${logger}|{traceId=&quot;${mdlc:item=trace_id}&quot;,spanId=&quot;${mdlc:item=span_id}&quot;service=&quot;${mdlc:item=service.name}&quot;,environment=&quot;${mdlc:item=deployment.environment}&quot;}|${message}" />
    </targets>

    <!-- rules to map from logger name to target -->
    <rules>
        <logger name="*" minlevel="Trace" writeTo="jsonFile-includeMdlc-true,jsonFile-includeMdlc-false,textFile" />
    </rules>
</nlog>