I am looking for example configuration on how to get Log4net logging to a Syslog server. Any help would be welcome.
I didn't find Simon Whittemore's entry very helpful, this is what got my appender producing "proper" syslog remote messages:
<appender name="RemoteSyslogAppender" type="log4net.Appender.RemoteSyslogAppender">
<identity value="HepeManok" />
<layout type="log4net.Layout.PatternLayout" value="%-5p %type: %m%n"/>
<remoteAddress value="syslog.lameserver.net" />
</appender>
The "key" [sic] is the identity parameter, that produces the correct (or correct looking) output - I'm using rsyslog on Debian, YMMV.
You most definitely do not need or want to send the date (as in Simon Whittemore's blog), as syslogd will add the date for you, using the server's timezone.
Here's a received message from my log4net enabled app, followed by a real message:
Jun 21 09:58:40 vs2008.local HepeManok: INFO Irc: irc_OnConnected
Jun 21 09:42:45 chips30 kernel: [10210014.974069] device eth0 entered promiscuous mode
As you can see, the basic format of "Date Time Host Service: message" is all good, unlike
Jun 21 09:38:57 WARN Irc [(null)] - OnQuit#015
or an example of what Simon's config would produce:
Jun 21 09:56:42 Hepe Manok.vshost.exe: 21/06/2012 07:54:44,828 | 6 | INFO | Irc | WIN-2008-DEV\Administrator | WIN-2008-DEV | dev | irc_OnConnecting | |
<appender name="UdpAppender" type="log4net.Appender.UdpAppender">
<param name="RemoteAddress" value="127.0.0.1" />
<param name="RemotePort" value="514" />
<layout type="log4net.Layout.PatternLayout, log4net">
<conversionPattern value="%-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
Instead of using the lower-level UDP appender, you could try log4net.Appender.RemoteSyslogAppender. You can find an example in Simon Whittemore's blog entry Centralised Application logging via Log4Net.
<appender name="RemoteSyslogAppender" type="log4net.Appender.RemoteSyslogAppender">
<layout type="log4net.Layout.PatternLayout" value="%date{dd/MM/yyyy hh:mm:ss,fff} | %thread | %level | %logger | %username | %P{log4net:HostName} | dev | %message | %exception | "/>
<remoteAddress value="LOGSERVER" />
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="ALL" />
</filter>
</appender>
You could also give syslog4net a try. syslog4net works by creating a custom log4net layout that writes messages in Syslog’s RFC5424 standard format. You can then hook that up to any log4net appender. You can write to a Syslog daemon, splunk, or any machine data aggregator pretty easily by connecting our SyslogLayout class to log4net’s UdpAppender or syslog4net's custom TcpAppender.
Documentation, usage, and examples are available on the project's github site.
I have my servers logging to a ubuntu server running syslog-ng. In order to get the hostname showing correctly, I used this:
<appender name="RemoteSyslogAppender" type="log4net.Appender.RemoteSyslogAppender">
<facility value="local7" />
<identity value=" %date{yyyy-MM-ddTHH:mm:ss.ffffffzzz} %P{log4net:HostName} %P{app}" />
<RemoteAddress value="192.168.1.248" />
<layout type="log4net.Layout.PatternLayout" value=" %P{pid}:%logger %m%n"/>
<RemotePort value="516" />
</appender>
Related
I'm using log4net in a c# windows service, so the main application runs every time. I configured log4net to log into a date specific directory. Inside this directory log4net creates a logfile with a timestamp in the filename. This works fine. The probem is, that it only creates a new logfile, when the windows service restarts. This causes the logfile to get very big, expecially if the service runs over several days.
The question is:
Is there a possibility to force log4net to start with a new logfile throughout my code.
This is my log4net config:
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file type="log4net.Util.PatternString" value="${ProgramData}\Sirona\Log\AcqSrv\%date{yyMMdd}\AcqSrvAll-%date{HHmmss}.log" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%2thread] [%-5level] [%logger] - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="FileAppender" />
</root> <!-- Do not want NHibernate log -->
</log4net>
Best regards
Emu
I think your problem is solved by the RollingFileAppender: http://logging.apache.org/log4net/release/config-examples.html
http://logging.apache.org/log4net/release/sdk/log4net.Appender.RollingFileAppender.html
It works exactly as a FileAppender but once it reach a maximum size (configurable) it creates another log file.
You can also instruct it to keep only the latest X log files.
Hope it helps.
We're using Log4Net with a FileAppender to log errors during a process. As the process is finishing, we want to email the log file but we can't do that as it Log4Net still has a lock on the file and we get a message that the file is in use by another process. Any ideas?
We're using a config like this:
<appender name="WarnFileAppender" type="log4net.Appender.FileAppender">
<file value="d:\for-review-log.txt" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %logger - %message%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="INFO" />
<levelMax value="WARN" />
</filter>
<filter type="log4net.Filter.DenyAllFilter" />
<appendToFile value="false"></appendToFile>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
</appender>
I assume log is from some kind of service, so the log will be locked until service is running.
You probably want to use shared lock while reading the file for sending.
Or you can copy the file and send the copy.
ive got the same problem. Olso a flush doesn't work and when i try to use the SMTPmailAppender that olso doesn't seem to work somehow. but when i use my own created class to send email it works, only he doesn't add the attachment(logfile)
I'm configuring log4net with:
[assembly: log4net.Config.XmlConfigurator(ConfigFile = "../ProjectName/Log4Net.config", Watch = true)]
I have 2 appenders configured:
1. An AdoNetAppender logging to a Log table on a mssql2008 database.
2. A FileAppender that just looks like this:
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="c:\log-file.txt" />
<appendToFile value="true" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
The problem is that when an action gets logged, it immediately appears in log-file.txt. It doesn't appear as an entry in the database until I either do iisreset, recompile the web code, or recycle the app pool.
The configuration seems right as the action does eventually get logged to the database. I just don't understand why the delay.
Can anybody give me a reason or tell me how to fix it?
The AdoNetAppender is a buffered appender. If you want it to write directly to the database you need to set the buffer size to 1:
<bufferSize value="1" />
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.
I have a web app that uses log4net to log errors to a log file.
It works well when I publish my website via xcopy but when I build a package installer, log4net does not appear to work when remote users access my site.
I use impersonate=true in my web.config and log4net only logs errors when I am the logged user.
I have another app that works fine in all cases but was not package deployed.
Does anyone have any thoughts?
After all it was a permission issue
setting the write permission to everyone log4net started logging well as it uses the
current logged user account
regards
i don't think so because same config is used in a working app
but here it is
what user does log4net uses when writing to disk?!
Is there any need to add permissions to write to log folders? Because i use impersonate=true the user logged to the site is the one that log4net is using to write
to file system right?!
<!-- log4net -->
<log4net debug="false">
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="D:\\WSBank\\Solution\\Logs\\Solution.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1024KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="RollingFileAppender" />
</root>
</log4net>