diff options
| author | Rainer Gerhards <rgerhards@adiscon.com> | 2007-06-18 10:04:23 +0000 |
|---|---|---|
| committer | Rainer Gerhards <rgerhards@adiscon.com> | 2007-06-18 10:04:23 +0000 |
| commit | dfe12b03eb40535d3393239d9acac155c82ab8f6 (patch) | |
| tree | bb978ad3992dbed1ab77777000d24246ec686af0 /doc | |
| parent | e58ff8a7a07fb042a4e5b5eae7c671199a2d677b (diff) | |
| download | rsyslog-dfe12b03eb40535d3393239d9acac155c82ab8f6.tar.gz rsyslog-dfe12b03eb40535d3393239d9acac155c82ab8f6.tar.xz rsyslog-dfe12b03eb40535d3393239d9acac155c82ab8f6.zip | |
added new document on recording syslog priority to log files
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/manual.html | 108 | ||||
| -rw-r--r-- | doc/property_replacer.html | 15 | ||||
| -rw-r--r-- | doc/rsyslog_recording_pri.html | 134 |
3 files changed, 201 insertions, 56 deletions
diff --git a/doc/manual.html b/doc/manual.html index 8e15cc91..f3bb40cb 100644 --- a/doc/manual.html +++ b/doc/manual.html @@ -1,54 +1,54 @@ -<html>
-<head>
-<title>rsyslog documentation</title>
-</head>
-<body>
-<h1>RSyslog - Documentation</h1>
-<p><b><a href="http://www.rsyslog.com/">Rsyslog</a> is an enhanced syslogd
-supporting, among others, <a href="rsyslog_mysql.html">MySQL</a>, syslog/tcp,
-fine grain output format control, and the ability to filter on any message part.</b>
-It is quite compatible to stock
-sysklogd and can be used as a drop-in replacement. Its <a href="features.html">
-advanced features</a> make it suitable for enterprise-class,
-<a href="rsyslog_stunnel.html">encryption protected syslog</a>
-relay chains while at the same time being very easy to setup
-for the novice user.</p>
-<p>Visit the <a href="status.html">rsyslog status page</a> to obtain current
-version information and ports. <b>If you like rsyslog, you might want to lend us
-a helping hand. </b>It doesn't require a lot of time - even a single mouse click
-helps. Learn <a href="how2help.html">how to help the rsyslog project</a>.</p>
-<p><b>Follow the links below for the</b></p>
-<ul>
-<li><a href="rsyslogd.man.txt">rsyslogd man page</a>
-<li><a href="rsyslog_conf.html">configuration file syntax (rsyslog.conf)</a>
-<li>a commented <a href="sample.conf.html">sample rsyslog.conf</a>
-<li><a href="bugs.html">rsyslog bug list</a><li><a href="rsyslog_packages.html">
rsyslog packages</a><li><a href="generic_design.html">backgrounder on generic
syslog application design</a></ul>
-<p><b>We have some in-depth papers on</b></p>
-<ul>
- <li><a href="install.html">installing rsyslog</a></li>
- <li><a href="rsyslog_stunnel.html">ssl-encrypting syslog with stunnel</a></li>
- <li><a href="rsyslog_mysql.html">writing syslog messages to MySQL</a></li>
- <li><a href="rsyslog_php_syslog_ng.html">using php-syslog-ng with rsyslog</a></li>
-</ul>
-<p>Also, there is an article from Dennis Olvany on
-<a href="rsyslog084-freebsd5.4.txt">Syslog-to-SQL with rsyslog-0.8.4 on FreeBSD 5.4</a>
-(which unfortunately is a bit outdated now). Thanks to Ozgur Karatas, we also
have a
<a href="http://www.rsyslog.com/index.php?module=Static_Docs&func=view&f=/turkish-install-1.0.1.pdf">turkish install howto</a> (online-only, based on the 1.0.1 release).</p>
-<p>Our <a href="history.html">rsyslog history</a> page is for you if you would like to learn a little more
-on why there is an rsyslog at all.</p>
-<p>Documentation is added continously. Please note that the documentation here
-matches only the current version of rsyslog. If you use an older version, be sure
-to use the doc that came with it.</p>
-<p><b>You can also browse the following online ressources:</b></p>
-<ul>
-<li><a href="http://www.rsyslog.com/module-Static_Docs-view-f-manual.html.phtml">rsyslog online documentation</a></li>
-<li><a href="http://www.rsyslog.com/Topic3.phtml">rsyslog FAQ</a></li>
-<li><a href="http://www.rsyslog.com/PNphpBB2.phtml">rsyslog discussion forum</a></li>
-<li><a href="http://www.rsyslog.com/Topic4.phtml">rsyslog change log</a></li>
-<li><a href="http://www.monitorware.com/en/syslog-enabled-products/">syslog device configuration guide</a> (off-site)</li>
-</ul>
-<p>And don't forget about the <a href="http://lists.adiscon.net/mailman/listinfo/rsyslog">rsyslog mailing list</a>.
-If you are interested in the "backstage", you may find
-<a href="http://www.adiscon.com/en/people/rainer-gerhards.php">Rainer</a>'s
-<a href="http://rgerhards.blogspot.com/">syslog blog</a> an interesting read.</p>
-</body>
-</html>
+<html>
+<head>
+<title>rsyslog documentation</title>
+</head>
+<body>
+<h1>RSyslog - Documentation</h1>
+<p><b><a href="http://www.rsyslog.com/">Rsyslog</a> is an enhanced syslogd
+supporting, among others, <a href="rsyslog_mysql.html">MySQL</a>, syslog/tcp,
+fine grain output format control, and the ability to filter on any message part.</b>
+It is quite compatible to stock
+sysklogd and can be used as a drop-in replacement. Its <a href="features.html">
+advanced features</a> make it suitable for enterprise-class,
+<a href="rsyslog_stunnel.html">encryption protected syslog</a>
+relay chains while at the same time being very easy to setup
+for the novice user.</p>
+<p>Visit the <a href="status.html">rsyslog status page</a> to obtain current
+version information and ports. <b>If you like rsyslog, you might want to lend us
+a helping hand. </b>It doesn't require a lot of time - even a single mouse click
+helps. Learn <a href="how2help.html">how to help the rsyslog project</a>.</p>
+<p><b>Follow the links below for the</b></p>
+<ul>
+<li><a href="rsyslogd.man.txt">rsyslogd man page</a>
+<li><a href="rsyslog_conf.html">configuration file syntax (rsyslog.conf)</a>
+<li>a commented <a href="sample.conf.html">sample rsyslog.conf</a>
+<li><a href="bugs.html">rsyslog bug list</a><li><a href="rsyslog_packages.html">
rsyslog packages</a><li><a href="generic_design.html">backgrounder on generic
syslog application design</a></ul>
+<p><b>We have some in-depth papers on</b></p>
+<ul>
+ <li><a href="install.html">installing rsyslog</a></li>
+ <li><a href="rsyslog_stunnel.html">ssl-encrypting syslog with stunnel</a></li>
+ <li><a href="rsyslog_mysql.html">writing syslog messages to MySQL</a></li>
+ <li><a href="rsyslog_php_syslog_ng.html">using php-syslog-ng with rsyslog</a></li>
<li><a href="rsyslog_recording_pri.html">recording the syslog priority
(severity and facility) to the log file</a></li>
+</ul>
+<p>Also, there is an article from Dennis Olvany on
+<a href="rsyslog084-freebsd5.4.txt">Syslog-to-SQL with rsyslog-0.8.4 on FreeBSD 5.4</a>
+(which unfortunately is a bit outdated now). Thanks to Ozgur Karatas, we also
have a
<a href="http://www.rsyslog.com/index.php?module=Static_Docs&func=view&f=/turkish-install-1.0.1.pdf">turkish install howto</a> (online-only, based on the 1.0.1 release).</p>
+<p>Our <a href="history.html">rsyslog history</a> page is for you if you would like to learn a little more
+on why there is an rsyslog at all.</p>
+<p>Documentation is added continously. Please note that the documentation here
+matches only the current version of rsyslog. If you use an older version, be sure
+to use the doc that came with it.</p>
+<p><b>You can also browse the following online ressources:</b></p>
+<ul>
+<li><a href="http://www.rsyslog.com/module-Static_Docs-view-f-manual.html.phtml">rsyslog online documentation</a></li>
+<li><a href="http://www.rsyslog.com/Topic3.phtml">rsyslog FAQ</a></li>
+<li><a href="http://www.rsyslog.com/PNphpBB2.phtml">rsyslog discussion forum</a></li>
+<li><a href="http://www.rsyslog.com/Topic4.phtml">rsyslog change log</a></li>
+<li><a href="http://www.monitorware.com/en/syslog-enabled-products/">syslog device configuration guide</a> (off-site)</li>
+</ul>
+<p>And don't forget about the <a href="http://lists.adiscon.net/mailman/listinfo/rsyslog">rsyslog mailing list</a>.
+If you are interested in the "backstage", you may find
+<a href="http://www.adiscon.com/en/people/rainer-gerhards.php">Rainer</a>'s
+<a href="http://rgerhards.blogspot.com/">syslog blog</a> an interesting read.</p>
+</body>
+</html>
diff --git a/doc/property_replacer.html b/doc/property_replacer.html index a6618616..9bd77cec 100644 --- a/doc/property_replacer.html +++ b/doc/property_replacer.html @@ -36,8 +36,12 @@ BSD syslogd. For example, when TAG is "named[12345]", programname is "named".</t to a <a href="http://www.monitorware.com">MonitorWare</a> backend (also for <a href="http://www.phplogcon.org/">phpLogCon</a>)</td></tr> <tr><td><b>syslogfacility</b></td><td>the facility from the message - in numerical form</td></tr> -<tr><td><b>syslogpriority</b></td><td>the priority (actully severity!) from the - message - in numerical form</td></tr> +<tr> + <td><b>syslogseverity</b></td><td>severity from the + message - in numerical form</td> +</tr> +<tr><td><b>syslogpriority</b></td><td>an alis for syslogseverity - included for + historical reasons (be careful: it still is the severity, not PRI!)</td></tr> <tr><td><b>timegenerated</b></td><td>timestamp when the message was RECEIVED. Always in high resolution</td></tr> <tr><td><b>timereported</b></td><td>timestamp from the message. Resolution depends on @@ -106,5 +110,12 @@ are defined:</p> replacement character like space.</td></tr> </table> +<h2>Further Links</h2> +<ul> + <li>Article on "<a href="rsyslog_recording_pri.html">Recording the Priority of + Syslog Messages</a>" (describes use of templates to record severity and + facility of a message)</li> +</ul> + </body> </html> diff --git a/doc/rsyslog_recording_pri.html b/doc/rsyslog_recording_pri.html new file mode 100644 index 00000000..c84d47fa --- /dev/null +++ b/doc/rsyslog_recording_pri.html @@ -0,0 +1,134 @@ +<html><head> +<title>Writing syslog Data to MySQL</title> +<meta name="KEYWORDS" content="syslog, mysql, syslog to mysql, howto"> +</head> +<body> +<h1>Recording the Priority of Syslog Messages</h1> + <P><small><i>Written by + <a href="http://www.adiscon.com/en/people/rainer-gerhards.php">Rainer + Gerhards</a> (2007-06-18)</i></small></P> +<h2>Abstract</h2> +<p><i><b>The so-called priority (PRI) is very important in syslog messages, +because almost all filtering in syslog.conf is based on it.</b> However, many +syslogds (including the Linux stock sysklogd) do not provide a way to record +that value. In this article, I'll give a brief overview of how PRI can be +written to a log file.</i></p> +<h2>Background</h2> +<p>The PRI value is a combination of so-called severity and facility. The +facility indicates where the message originated from (e.g. kernel, mail +subsystem) while the severity provides a glimpse of how important the message +might be (e.g. error or informational). Be careful with these values: they are +in no way consistent accross applications (especially severity). However, they +still form the basis of most filtering in syslog.conf. For example, the +directive (aka "selector line)</p> +<p align="center"> +<code>mail.* /var/log/mail.log</code> +</p> +<p>means that messages with the mail facility should be stored to +/var/log/mail.log, no matter which severity indicator they have (that is telling +us the asterisk). If you set up complex conditions, it can be annoying to find +out which PRI value a specific syslog message has. Most stock syslogds do not +provide any way to record them.</p> +<h2>How is it done?</h2> +<p>With <a href="http://www.rsyslog.com/">rsyslog</a>, PRI recording is simple. +All you need is the correct template. Even if you do not use rsyslog on a regular +basis, it might be a handy tool for finding out the priority.</p> +<p>Rsyslog provides a flexible system to specify the output formats. It is +template-based. A template with the traditional syslog format looks as follows:</p> +<p align="center"> +<code>$template TraditionalFormat,"%timegenerated% %HOSTNAME% %syslogtag%%msg:::drop-last-lf%\n"</code> +</p> +<p>The part in quotes is the output formats. Things between percent-signs are +so-called <a href="property_replacer.html">messages properties</a>. They are replaced with the respective content +from the syslog message when output is written. Everything outside of the +percent signs is literal text, which is simply written as specified.</p> +<p>Thankfully, rsyslog provides message properties for the priority. These are +called "PRI", "syslogfacility" and "syslogpriority" (case is important!). They are numerical +values. Starting with rsyslog 1.13.4, there is also a property "PRI-text", which +contains the priority in friendly text format (e.g. "syslog.info"). For the rest +of this article, I assume that you run version 1.13.4 or higher.</p> +<p>Recording the priority is now a simple matter of adding the respective field +to the template. It now looks like this:</p> +<p align="center"> +<code>$template TraditionalFormatWithPRI,"%PRI-text%: %timegenerated% %HOSTNAME% %syslogtag%%msg:::drop-last-lf%\n"</code> +</p> +<p>Now we have the right template - but how to write it to a file? You probably +have a line like this in your syslog.conf:</p> +<p align="center"><code>*.* -/var/log/messages.log</code></p> +<p>It does not specify a template. Consequently, rsyslog uses the traditional +format. In order to use some other format, simply specify the template after the +semicolon:</p> +<p align="center"><code>*.* -/var/log/messages.log;TraditionalFormatWithPRI</code></p> +<p>That's all you need to do. There is one common pitfall: you need to define +the template before you use it in a selector line. Otherwise, you will receive +an error.</p> +<p>Once you have applied the changes, you need to restart or HUP rsyslogd. It +will then pick the new configuration.</p> +<h2>What if I do not want rsyslogd to be the standard syslogd?</h2> +<p>If you do not want to switch to rsyslog, you can still use it as a setup aid. +A little bit of configuration is required.</p> +<ol> + <li>Download, make and install rsyslog</li> + <li>copy your syslog.conf over to rsyslog.conf</li> + <li>add the template described above to it; select the file that should use + it</li> + <li>stop your regular syslog daemon for the time being</li> + <li>run rsyslogd (you may even do this interactively by calling it with the + -n additional option from a shell)</li> + <li>stop rsyslogd (press ctrl-c when running interactively)</li> + <li>restart your regular syslogd</li> +</ol> +<p>That's it - you can now review the priorities.</p> +<h2>Some Sample Data</h2> +<p>Below is some sample data created with the template specified above. Note the +priority recording at the start of each line.</p> +<p> +<code>kern.info<6>: Jun 15 18:10:38 host kernel: PCI: Sharing IRQ 11 with 00:04.0<br> +kern.info<6>: Jun 15 18:10:38 host kernel: PCI: Sharing IRQ 11 with 01:00.0<br> +kern.warn<4>: Jun 15 18:10:38 host kernel: Yenta IRQ list 06b8, PCI irq11<br> +kern.warn<4>: Jun 15 18:10:38 host kernel: Socket status: 30000006<br> +kern.warn<4>: Jun 15 18:10:38 host kernel: Yenta IRQ list 06b8, PCI irq11<br> +kern.warn<4>: Jun 15 18:10:38 host kernel: Socket status: 30000010<br> +kern.info<6>: Jun 15 18:10:38 host kernel: cs: IO port probe 0x0c00-0x0cff: clean.<br> +kern.info<6>: Jun 15 18:10:38 host kernel: cs: IO port probe 0x0100-0x04ff: excluding 0x100-0x107 0x378-0x37f 0x4d0-0x4d7<br> +kern.info<6>: Jun 15 18:10:38 host kernel: cs: IO port probe 0x0a00-0x0aff: clean.<br> +local7.notice<189>: Jun 15 18:17:24 host dd: 1+0 records out<br> +local7.notice<189>: Jun 15 18:17:24 host random: Saving random seed: succeeded<br> +local7.notice<189>: Jun 15 18:17:25 host portmap: portmap shutdown succeeded<br> +local7.notice<189>: Jun 15 18:17:25 host network: Shutting down interface eth1: succeeded<br> +local7.notice<189>: Jun 15 18:17:25 host network: Shutting down loopback interface: succeeded<br> +local7.notice<189>: Jun 15 18:17:25 host pcmcia: Shutting down PCMCIA services: cardmgr<br> +user.notice<13>: Jun 15 18:17:25 host /etc/hotplug/net.agent: NET unregister event not supported<br> +local7.notice<189>: Jun 15 18:17:27 host pcmcia: modules.<br> +local7.notice<189>: Jun 15 18:17:29 host rc: Stopping pcmcia: succeeded<br> +local7.notice<189>: Jun 15 18:17:30 host rc: Starting killall: succeeded<br> +syslog.info<46>: Jun 15 18:17:33 host [origin software="rsyslogd" swVersion="1.13.3" x-pid="2464"] exiting on signal 15.<br> +syslog.info<46>: Jun 18 10:55:47 host [origin software="rsyslogd" swVersion="1.13.3" x-pid="2367"][x-configInfo udpReception="Yes" udpPort="514" tcpReception="Yes" tcpPort="1470"] restart<br> +user.notice<13>: Jun 18 10:55:50 host rger: test<br> +syslog.info<46>: Jun 18 10:55:52 host [origin software="rsyslogd" swVersion="1.13.3" x-pid="2367"] exiting on signal 2.</code></p> +<h2>Feedback Requested</h2> +<P>I would appreciate feedback on this paper. If you have additional ideas, +comments or find bugs, please +<a href="mailto:rgerhards@adiscon.com">let me know</a>.</P> +<h2>References and Additional Material</h2> +<ul> + <li><a href="http://www.rsyslog.com">www.rsyslog.com</a> - the rsyslog site</li> +</ul> +<h2>Revision History</h2> +<ul> + <li>2007-06-18 * + <a href="http://www.adiscon.com/en/people/rainer-gerhards.php">Rainer Gerhards</a> + * initial version created</li> +</ul> +<h2>Copyright</h2> +<p>Copyright (c) 2007 +<a href="http://www.adiscon.com/en/people/rainer-gerhards.php">Rainer Gerhards</a> +and <a href="http://www.adiscon.com/en/">Adiscon</a>.</p> +<p>Permission is granted to copy, distribute and/or modify this document under +the terms of the GNU Free Documentation License, Version 1.2 or any later +version published by the Free Software Foundation; with no Invariant Sections, +no Front-Cover Texts, and no Back-Cover Texts. A copy of the license can be +viewed at <a href="http://www.gnu.org/copyleft/fdl.html"> +http://www.gnu.org/copyleft/fdl.html</a>.</p> +</body> +</html>
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