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<div id="preamble"><h1>Apache Module mod_journald</h1>
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<p><span>Available Languages: </span><a href="/en/mod/mod_journald.html" title="English"> en </a></p>
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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>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>journald_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_journald.c</td></tr></table>
<h3>Summary</h3>
<p>This module provides "journald" ErrorLog provider. It allows logging
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<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
</ul>
<h3>Topics</h3>
<ul id="topics">
</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
<div class="directive-section"><h2><a name="JournaldCustomLog" id="JournaldCustomLog">JournaldCustomLog</a> <a name="journaldcustomlog" id="journaldcustomlog">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable logging of CustomLog/TransferLog to systemd-journald</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>JournaldCustomLog on|off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>JournaldCustomLog off</code></td></tr>
</table>
<p>The <code class="directive">JournaldCustomLog</code> directive enables logging
of CustomLog and TransferLog messages to systemd-journald.
</p>
<div class="warning"><h3>Performance warning</h3><p>
Currently, systemd-journald is not designed for high-throughput logging
and logging access_log to systemd-journald could decrease the performance
a lot.
</p></div>
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<div class="section">
<h2><a name="structured" id="structured">Structured logging</a></h2>
<p>Systemd-journald allows structured logging and therefore it is
possible to filter logged messages according to various variables.
Currently supported variables are:
</p>
<dl>
<dt><code>LOG</code></dt>
<dd>The name of the log. For ErrorLog, the value is "error_log".
For CustomLog or TransferLog, the value is the first argument of
these directives.</dd>
<dt><code>REQUEST_HOSTNAME</code></dt>
<dd>Host, as set by full URI or Host: header in the request.</dd>
<dt><code>REQUEST_USER</code></dt>
<dd>If an authentication check was made, this gets set to the user
name.</dd>
<dt><code>REQUEST_USERAGENT_IP</code></dt>
<dd>The address that originated the request.</dd>
<dt><code>REQUEST_URI</code></dt>
<dd>The path portion of the URI, or "/" if no path provided.</dd>
<dt><code>SERVER_HOSTNAME</code></dt>
<dd>The hostname of server for which the log message has been
generated.</dd>
</dl>
<p>These variables can be for example used to show only log messages
for particular URI using <code>journalctl</code>:
</p>
<p>For more examples, see systemd-journalctl documentation.</p>
<div class="section">
<h2><a name="examples" id="examples">Examples</a></h2>
<p>Using <code>journald</code> in ErrorLog directive (see <code class="module"><a href="/mod/core.html">core</a></code>)
instead of a filename enables logging via systemd-journald(8)
if the system supports it.
</p>
<pre class="prettyprint lang-config">ErrorLog journald</pre>
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