Log4net appender examples

buffered.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <!-- Buffer 128 entries except with log level severity is WARN or higher. -->
  <appender name="buffer" type="log4net.Appender.BufferingForwardingAppender">
    <bufferSize value="128" />
    <appender-ref ref="console" />
    <!--<lossy value="false" />-->
    <!--<OnlyFixPartialEventData value="true"/>-->
    <evaluator type="log4net.Core.LevelEvaluator">
      <threshold value="WARN"/>
    </evaluator>
    <Fix value="268"/> <!--FixFlags.Message|FixFlags.ThreadName|FixFlags.Exception-->
    <!-- Set Fix flag to NONE -->
  </appender>

  <appender name="console"
            type="log4net.Appender.ColoredConsoleAppender">
    <mapping>
      <level value="WARN"/>
      <foreColor value="Yellow,HighIntensity"/>
    </mapping>
    <mapping>
      <level value="ERROR"/>
      <foreColor value="Red"/>
    </mapping>
    <mapping>
      <level value="FATAL"/>
      <foreColor value="White,HighIntensity"/>
      <backColor value="Red" />
    </mapping>
    <mapping>
      <level value="INFO"/>
      <foreColor value="White"/>
    </mapping>
    <mapping>
      <level value="DEBUG"/>
      <foreColor value="Green"/>
    </mapping>
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%-3thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="buffer" />
  </root>
  
</log4net>

colored-console.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <appender name="console"
            type="log4net.Appender.ColoredConsoleAppender">
    <mapping>
      <level value="WARN"/>
      <foreColor value="Yellow,HighIntensity"/>
    </mapping>
    <mapping>
      <level value="ERROR"/>
      <foreColor value="Red"/>
    </mapping>
    <mapping>
      <level value="FATAL"/>
      <foreColor value="White,HighIntensity"/>
      <backColor value="Red" />
    </mapping>
    <mapping>
      <level value="INFO"/>
      <foreColor value="White"/>
    </mapping>
    <mapping>
      <level value="DEBUG"/>
      <foreColor value="Green"/>
    </mapping>
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%-3thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="console" />
  </root>
  
</log4net>

combined.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <appender name="file"
            type="log4net.Appender.RollingFileAppender">
    <file value="logs/" />
    <appendToFile value="false" />
    <!--Size, Date, Composite-->
    <rollingStyle value="Size" />
    <immediateFlush value="true" />
    <!--ExclusiveLock-->
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    <maxSizeRollBackups value="-1" />
    <countDirection value="1" />
    <maximumFileSize value="10MB" />
    <staticLogFileName value="true" />
    <preserveLogFileNameExtension value="true" />
    <!--datePattern value=".yyyy-MM-dd" /-->
    <threshold value="Info" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%utcdate [%thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>

  <appender name="console"
            type="log4net.Appender.ColoredConsoleAppender">
    <threshold value="Info" />
    <mapping>
      <level value="WARN"/>
      <foreColor value="Yellow,HighIntensity"/>
    </mapping>
    <mapping>
      <level value="ERROR"/>
      <foreColor value="Red"/>
    </mapping>
    <mapping>
      <level value="FATAL"/>
      <foreColor value="White,HighIntensity"/>
      <backColor value="Red" />
    </mapping>
    <mapping>
      <level value="INFO"/>
      <foreColor value="White"/>
    </mapping>
    <mapping>
      <level value="DEBUG"/>
      <foreColor value="Green"/>
    </mapping>
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%-3thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>

  <appender name="trace"
            type="log4net.Appender.TraceAppender">
    <threshold value="All" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="[%-3thread] %-5level [%ndc] - %message%newline" />
    </layout>
  </appender>

  <appender name="debug"
            type="log4net.Appender.OutputDebugStringAppender">
    <threshold value="Debug" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="[%-3thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>


  <appender name="eventlog"
            type="log4net.Appender.EventLogAppender" >
    <applicationName value="MyApp" />
    <threshold value="Warn" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="[%thread] %logger [%property{NDC}] - %message%newline" />
    </layout>
  </appender>

  <appender name="syslog"
            type="log4net.Appender.RemoteSyslogAppender">
    <identity value="MyApp" />
    <remoteAddress value="syslogserver.lan" />
    <threshold value="Warn" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="[%thread] %logger [%property{NDC}] - %message%newline" />
    </layout>
  </appender>

  <logger name="NHibernate">
    <level value="Debug" /> <!-- Not ALL -->
  </logger>

  <logger name="NHibernate.SQL">
    <level value="OFF"/>
  </logger>

  <logger name="NServiceBus">
    <level value="INFO" />
  </logger>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="trace" />
    <appender-ref ref="console" />
    <appender-ref ref="file" />
    <appender-ref ref="eventlog" />
  </root>

</log4net>

eventlog.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <appender name="eventlog"
            type="log4net.Appender.EventLogAppender" >
    <applicationName value="MyApp" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="[%thread] %logger [%property{NDC}] - %message%newline" />
    </layout>
  </appender>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="eventlog" />
  </root>
  
</log4net>

log-level-per-logger.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <appender name="console"
            type="log4net.Appender.ColoredConsoleAppender">
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%-3thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>


  <logger name="NHibernate">
    <level value="INFO" />
  </logger>

  <logger name="NHibernate.SQL">
    <level value="OFF"/>
  </logger>

  <logger name="NServiceBus">
    <level value="WARN" />
  </logger>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="console" />
  </root>
  
</log4net>

log4net-nhibernate.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <appender name="file"
            type="log4net.Appender.RollingFileAppender">
    <file value="logs/application.log" />
    <appendToFile value="false" />
    <!--Size, Date, Composite-->
    <rollingStyle value="Size" />
    <immediateFlush value="true" />
    <!--ExclusiveLock-->
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    <maxSizeRollBackups value="-1" />
    <countDirection value="1" />
    <maximumFileSize value="10MB" />
    <staticLogFileName value="true" />
    <preserveLogFileNameExtension value="true" />
    <!--datePattern value=".yyyy-MM-dd" /-->
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%utcdate [%thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>

  <appender name="file"
            type="log4net.Appender.RollingFileAppender">
    <file value="logs/nhibernate.log" />
    <appendToFile value="false" />
    <!--Size, Date, Composite-->
    <rollingStyle value="Size" />
    <immediateFlush value="true" />
    <!--ExclusiveLock-->
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    <maxSizeRollBackups value="-1" />
    <countDirection value="1" />
    <maximumFileSize value="10MB" />
    <staticLogFileName value="true" />
    <preserveLogFileNameExtension value="true" />
    <!--datePattern value=".yyyy-MM-dd" /-->
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%utcdate [%thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>

  <logger name="NHibernate.SQL"
          additivity="false">
    <level value="OFF"/>
  </logger>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="file" />
  </root>
  
</log4net>

rolling-file-on-size.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <appender name="file"
            type="log4net.Appender.RollingFileAppender">
    <file value="logs/" />
    <appendToFile value="false" />
    <!--Size, Date, Composite-->
    <rollingStyle value="Size" />
    <immediateFlush value="true" />
    <!--ExclusiveLock-->
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    <maxSizeRollBackups value="-1" />
    <countDirection value="1" />
    <maximumFileSize value="10MB" />
    <staticLogFileName value="true" />
    <preserveLogFileNameExtension value="true" />
    <!--datePattern value=".yyyy-MM-dd" /-->
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%utcdate [%thread] %-5level %logger [%ndc] - %message%newline" />
    </layout>
  </appender>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="file" />
  </root>
  
</log4net>

syslog.xml

<?xml version="1.0" encoding="utf-8"?>
<log4net>

  <appender name="syslog"
            type="log4net.Appender.RemoteSyslogAppender">
    <identity value="MyApp" />
    <remoteAddress value="syslogserver.lan" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="[%thread] %logger [%property{NDC}] - %message%newline" />
    </layout>
  </appender>

  <root>
    <priority value="ALL"/>
    <appender-ref ref="syslog" />
  </root>

</log4net>