doc/imkmsg.html


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<meta http-equiv="Content-Language" content="en"><title>/dev/kmsg Log Input Module (imkmsg)</title>

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<h1>/dev/kmsg Log Input Module</h1>
<p><b>Module Name:&nbsp;&nbsp;&nbsp; imkmsg</b></p>
<p><b>Authors: </b>Rainer Gerhards
&lt;rgerhards@adiscon.com&gt;<br />
Milan Bartos
&lt;mbartos@redhat.com&gt;</p>
<p><b>Description</b>:</p>
<p>Reads messages from the /dev/kmsg structured kernel log and submits them to the
syslog engine.</p>
<p>
The printk log buffer constains log records. These records are exported by /dev/kmsg
device as structured data in the following format:<br />
  "level,sequnum,timestamp;&lt;message text&gt;\n"<br />
There could be continuation lines starting with space that contains key/value pairs.<br />
<br />
Log messages are parsed as necessary into rsyslog msg_t structure. Continuation lines are parsed
as json key/value pairs and added into rsyslog's message json representation.
</p>
<p><b>Configuration Directives</b>:</p>
<p>This module has no configuration directives.</p>
<b>Caveats/Known Bugs:</b>
<p>This module can't be used together with imklog module. When using one of them, make sure the other
one is not enabled.</p>
<p>This is Linux specific module and requires /dev/kmsg device with structured kernel logs.</p>
<p><b>Sample:</b></p>
<p>The following sample pulls messages from the /dev/kmsg log device. All
parameters are left by default, which is usually a good idea. Please
note that loading the plugin is sufficient to activate it. No directive
is needed to start pulling messages.<br>
</p>
<textarea rows="15" cols="60">$ModLoad imkmsg
</textarea>
<p>[<a href="rsyslog_conf.html">rsyslog.conf overview</a>]
[<a href="manual.html">manual index</a>] [<a href="http://www.rsyslog.com/">rsyslog site</a>]</p>
<p><font size="2">This documentation is part of the
<a href="http://www.rsyslog.com/">rsyslog</a>
project.<br>
Copyright &copy; 2008-2009 by <a href="http://www.gerhards.net/rainer">Rainer
Gerhards</a> and
<a href="http://www.adiscon.com/">Adiscon</a>.
Released under the GNU GPL version 3 or higher.</font></p>
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