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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<title>mod_journald - Apache HTTP Server Version 2.5</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<body>
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<div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
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<p class="apache">Apache HTTP Server Version 2.5</p>
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<img alt="" src="../images/feather.png" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_journald</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_journald.html" title="English"> en </a> |
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<a href="../fr/mod/mod_journald.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
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</div>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides "journald" ErrorLog provider</td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>journald_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_journald.c</td></tr></table>
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<h3>Summary</h3>
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<p>This module provides "journald" ErrorLog provider. It allows logging
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error messages and CustomLog/TransferLog via systemd-journald(8).</p>
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</div>
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<div id="quickview"><h3>Topics</h3>
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<ul id="topics">
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<li><img alt="" src="../images/down.gif" /> <a href="#structured">Structured logging</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
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</ul><h3 class="directives">Directives</h3>
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<p>This module provides no
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directives.</p>
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<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_journald">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_journald">Report a bug</a></li></ul><h3>See also</h3>
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<ul class="seealso">
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<li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="structured" id="structured">Structured logging</a> <a title="Permanent link" href="#structured" class="permalink">¶</a></h2>
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<p>Systemd-journald allows structured logging and therefore it is
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possible to filter logged messages according to various variables.
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Currently supported variables are:
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</p>
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<dl>
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<dt><code>LOG</code></dt>
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<dd>The name of the log. For ErrorLog, the value is "error_log".
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For CustomLog or TransferLog, the value is the first argument of
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these directives.</dd>
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<dt><code>REQUEST_HOSTNAME</code></dt>
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<dd>Host, as set by full URI or Host: header in the request.</dd>
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<dt><code>REQUEST_USER</code></dt>
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<dd>If an authentication check was made, this gets set to the user
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name.</dd>
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<dt><code>REQUEST_USERAGENT_IP</code></dt>
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<dd>The address that originated the request.</dd>
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<dt><code>REQUEST_URI</code></dt>
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<dd>The path portion of the URI, or "/" if no path provided.</dd>
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<dt><code>SERVER_HOSTNAME</code></dt>
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<dd>The hostname of server for which the log message has been
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generated.</dd>
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</dl>
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<p>These variables can be for example used to show only log messages
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for particular URI using <code>journalctl</code>:
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</p>
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<pre class="prettyprint lang-">journalctl REQUEST_URI=/index.html -a</pre>
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<p>For more examples, see systemd-journalctl documentation.</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="examples" id="examples">Examples</a> <a title="Permanent link" href="#examples" class="permalink">¶</a></h2>
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<p>Using <code>journald</code> in ErrorLog directive (see <code class="module"><a href="../mod/core.html">core</a></code>)
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instead of a filename enables logging via systemd-journald(8)
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if the system supports it.
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</p>
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<pre class="prettyprint lang-config">ErrorLog journald</pre>
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<p>Using <code>journald</code> as an error log provider in CustomLog
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directive (see <code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code>) enables
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logging via systemd-journald(8) if the system supports it.
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</p>
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<pre class="prettyprint lang-config">CustomLog "journald" "%h %l %u %t \"%r\" %>s %b"</pre>
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<div class="warning"><h3>Performance warning</h3><p>
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Currently, systemd-journald is not designed for high-throughput logging
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and logging access_log to systemd-journald could decrease the performance
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a lot.
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</p></div>
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</div>
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</div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_journald.html" title="English"> en </a> |
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<a href="../fr/mod/mod_journald.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
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</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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