LogManager.ReconfigExistingLoggers() 不更新记录器存档生命周期

Question

Nlog.config

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="DEBUG" internalLogFile="temp\nlog-internal.log">

  
  <variable name="LogLevel" value="DEBUG"/>
  <variable name="brief" value="${longdate} | ${level} | ${logger} | ${message}"/>
  <variable name="verbose" value="${longdate} | ${machinename} | ${processid} | ${processname} | ${level} | ${logger} | ${message}"/>
  <variable name="logLifetime"  value="3"/>

  
  
  <targets >
    <target name="Global" xsi:type="File" fileName="Logs/GlobalLog.txt"  archiveNumbering="Date" enableArchiveFileCompression="true" archiveFileName="Archive/IPSlog.{#}.zip" archiveDateFormat="yyyy-MM-dd" 
     maxArchiveDays="${logLifetime}"
    archiveEvery="Day" />
    <target name="S42K" xsi:type="File" layout="${brief}" fileName="Logs/S42K.txt" archiveNumbering="Date" enableArchiveFileCompression="true" archiveFileName="Archive/S42K.{#}.zip" archiveDateFormat="yyyy-MM-dd"
    maxArchiveDays="${logLifetime}"
    archiveEvery="Day" />
    <target name="ServerApp"  xsi:type="File" archiveDateFormat="yyyy-MM-dd" archiveNumbering="Date" enableArchiveFileCompression="true" archiveFileName="Archive/IPSlog.{#}.zip" fileName="Logs/ServerApp.txt" 
     maxArchiveDays="${logLifetime}"
    archiveEvery="Day" />
    <target name="Color" xsi:type="ColoredConsole"  />

      <target name="S42KRawData" xsi:type="File" layout="${brief}" fileName="Logs/S42KRawData.txt" archiveNumbering="Date" enableArchiveFileCompression="true" archiveFileName="Archive/S42KRawData.{#}.zip" archiveDateFormat="yyyy-MM-dd"
   maxArchiveDays="${logLifetime}"
   archiveEvery="Day" />
      <target name="Advancis" xsi:type="File" layout="${brief}" fileName="Logs/Advancis.txt" archiveNumbering="Date" enableArchiveFileCompression="true" archiveFileName="Archive/Advancis.{#}.zip" archiveDateFormat="yyyy-MM-dd"
  maxArchiveDays="${logLifetime}"
  archiveEvery="Day" />
      
  </targets>

  <rules>
    <logger name="Global" minlevel="${LogLevel}"  writeTo="Global,Color" />
    <logger name="S42K" minlevel="${LogLevel}" writeTo="S42K,Color" />
    <logger name="ServerApp" minlevel="${LogLevel}" writeTo="ServerApp,Color" ></logger>
    <logger name="S42KRawData" minlevel="TRACE" writeTo="S42KRawData,Color" />
    <logger name="Advancis" minlevel="${LogLevel}" writeTo="Advancis,Color" />
    
  </rules>
</nlog>

服务启动时的代码部分

 LogManager.Configuration.Variables["logLifetime"] = SetingFromINIfile.Setting[settingIterator++].Parameter;//contains "1"
LogManager.ReconfigExistingLoggers();

但记录器不会重新配置并默认使用 3 天

一些细节：

在任务中调用 ReconfigExistingLoggers()
LogManager.Configuration.Variables["logLifetime"] return 1 改变后

有什么问题？

Answer 1

NLog Config Variables 可以在两种模式下运行：

静态模式 - ${logLifetime}
动态模式 - ${var:logLifetime}

静态模式适用于所有类型的属性，与其类型无关，但它们不会对运行时更改做出反应。

动态模式仅适用于 NLog Layout 类型的属性。 MaxArchiveDays is integer type and will not work. See also https://github.com/NLog/NLog/wiki/Var-Layout-Renderer

作为解决方法，您可以从代码更新 NLog 配置，并直接在 FileTarget 对象上分配属性：

var fileTargets = LogManager.Configuration.AllTargets.OfType<FileTarget>();

另一种解决方法是使用 autoReload="true" 并仅更新 NLog.config 文件，NLog 将 automatically reload 配置。

LogManager.ReconfigExistingLoggers() 不更新记录器存档生命周期

LogManager.ReconfigExistingLoggers() doesn't update loggers archive life time

c#

xml

logging

nlog