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="info"
      internalLogFile="log-internal.log">

    <extensions>
        <add assembly="NLog.Web.AspNetCore"/>
    </extensions>

    <!-- the targets to write to -->
    <targets>

        <target xsi:type="Console" name="alloutput"
            layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
        
        <!-- write logs to file  -->
        <!-- fileName="/tmp/log/nlog-all-${shortdate}.log" -->
        <target xsi:type="File" name="allfile" fileName="log-all-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />

        <!-- another file log, only own logs. Uses some ASP.NET core renderers -->
        <!-- fileName="/tmp/log/nlog-own-${shortdate}.log" -->
        <!-- // allFileに全部吐き出すので、こちらは不要。
        <target xsi:type="File" name="ownFile-web" fileName="log-own-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId_Id}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}" />
        -->
    </targets>

    <!-- rules to map from logger name to target -->
    <rules>
        <!--コンソールには Trace レベル以上のログすべてを出力-->
        <logger name="*" minlevel="Trace" writeTo="alloutput" />

        <!-- 参考：http://mslgt.hatenablog.com/entry/2018/09/06/044014 -->
        <!--Microsoft.* のクラスの Info レベル以下のログはスキップ-->
        <!-- <logger name="Microsoft.*" maxLevel="Info" final="true" />-->

        <!-- 全部吐き出す。-->
        <logger name="*" minlevel="Trace" writeTo="allfile" />

    </rules>
</nlog>