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How do you log the machine name via log4net?
(2 answers)
Closed 3 years ago.
Is there a parameter for the ConversionPattern that will include the host computer's name?
e.g.
<conversionPattern value="%hostname %date [%thread] %-5level %logger [%ndc] - %message%newline" />
I can't find anything in the log4net documentation that lists what % fields are available...
From the PatternLayout Class documentation page, use the log4net:HostName property to get the name of the machine on which a specific event was logged.
You would use this in your config:
<conversionPattern value="%property{log4net:HostName} %date [%thread] %-5level %logger [%ndc] - %message%newline" />
Related
I'm trying to configure an EventLogAppender in a .Net 6.0 console app, I'm using Log4Net 2.0.14 and I getting the following Exception...
log4net:ERROR Could not create Appender [EventLogAppender] of type [log4net.Appender.EventLogAppender]. Reported error follows.
System.TypeLoadException: Could not load type [log4net.Appender.EventLogAppender]. Tried assembly [log4net, Version=2.0.14.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a] and all loaded assemblies
at log4net.Util.SystemInfo.GetTypeFromString(Assembly relativeAssembly, String typeName, Boolean throwOnError, Boolean ignoreCase)
at log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(XmlElement appenderElement)
log4net:ERROR Appender named [EventLogAppender] not found.
This is my appender:
<log4net>
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
<applicationName value="Application" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="ERROR"/>
<appender-ref ref="EventLogAppender"/>
</root>
</log4net>
See the official EventLogAppender doc:
Please note that this appender is not natively available in log4net for dotnet standard, as it would bring in windows dependencies for non-windows consumers. Please see https://www.nuget.org/packages/log4net.appenders.netcore for an alternative if you still require EventLog logging for netstandard targets
So use the Nuget package "Log4Net.Appenders.NetCore".
The appender declaration is slightly different:
<appender name="EventLogAppender" type="Log4Net.Appenders.NetCore.EventLogAppender,Log4Net.Appenders.NetCore">
How to remove the word "FATAL" in log.fatal() in log4net. Example [2018-10-26 09:37:14,889] FATAL Log Message. How to remove FATAL from this by using log4net configuration? or its a default in log.fatal()?
This can be done by editing your configuration and removing [%level] field from the layout pattern.
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
<threshold value="DEBUG" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="[%date]-[%thread]-**[%level]**-[%logger] - %message%newline" />
</layout>
</appender>
I would like to know if it's possible to override a log4net appender threshold.
Default threshold level for the appender is ERROR, but for some namespaces i would like to log INFO as well, e.g. program start/stop info messages.
For example override the log level like this.
<appender name="Console" type="log4net.Appender.ConsoleAppender">
<threshold value="ERROR"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level %thread %logger - %message%newline" />
</layout>
<logger name="My.Main.Program">
<level value="INFO" />
</logger>
</appender>
Thanks in advance.
The goal is to have our application specific event logs in a folder with the name of our company. So, Company/App1, Company/App2. I would prefer to accomplish this with configuration, or with very little code. I tried setting logName to "MyFolder/MyLog" to no avail.
Example of a folder in event viewer, reference the Microsoft folder
This is my current Appender configuration:
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="WARN" />
<levelMax value="FATAL" />
</filter>
<applicationName value="ExampleApp" />
<logName value="MyLog" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
You can set the path directly in the configuration, where you specify the log name, just specify the full path. You must however make sure that whatever user your application is running under has write access to that folder. Permissions are usually the cause for problems like this.
My question may seem a little strange - I wish to log the conversionPattern used to format the messages logged with log4net when certain appenders are used.
For instance, if my log4net section looks like this:
<log4net xsi:noNamespaceSchemaLocation="http://csharptest.net/downloads/schema/log4net.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<appender name="MainAppender" type="log4net.Appender.RollingFileAppender">
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<file type="log4net.Util.PatternString" value="${NCLOGS}\NC.Entities.Test${CI_TAG}.%processid.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<MaximumFileSize value="10MB" />
<StaticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="INFO" />
<appender-ref ref="ConsoleAppender" />
<appender-ref ref="MainAppender" />
</root>
</log4net>
Then I would like to see %date [%thread] %-5level %logger - %message%newline in the log file.
Rationale I am using Log4View to view our logs and it demands the conversion pattern in order to be able to format the messages. I find it convenient if the conversion pattern is found in the log itself, this spares me the need to look for the respective config file and copy it from there.
Right now I am doing using some XPATH magic, but I am wondering if there is a better solution, probably using some log4net API.
Thanks.
One way to do it would be to add the pattern as a property when you start up the application. You could read the pattern from the config file or there might be a way to get the pattern for each of the appenders programatically, in which case you can add one property for each appender and then have each pattern for each appender log the property.
Something like this to add the property:
log4net.GlobalContext.Properties["PatternForAppender"]= getLoggerPattern();
And something like this to include it in the log:
<conversionPattern value="%logger (%property{PatternForAppender}) [%level] - %message%newline" />