rotatelogs.html.en 15.1 KB
Newer Older
powelld's avatar
powelld committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" />
<!--
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
              This file is generated from xml source: DO NOT EDIT
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
      -->
<title>rotatelogs - Piped logging program to rotate Apache logs - Apache HTTP Server Version 2.4</title>
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
<script src="../style/scripts/prettify.min.js" type="text/javascript">
</script>

<link href="../images/favicon.ico" rel="shortcut icon" /></head>
<body id="manual-page"><div id="page-header">
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.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>
<p class="apache">Apache HTTP Server Version 2.4</p>
<img alt="" src="../images/feather.png" /></div>
<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
<div id="path">
<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Programs</a></div><div id="page-content"><div id="preamble"><h1>rotatelogs - Piped logging program to rotate Apache logs</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/programs/rotatelogs.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/programs/rotatelogs.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
<a href="../ko/programs/rotatelogs.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
<a href="../tr/programs/rotatelogs.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
</div>

     <p><code>rotatelogs</code> is a simple program for use in
     conjunction with Apache's piped logfile feature.  It supports
     rotation based on a time interval or maximum size of the log.</p>
</div>
<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#synopsis">Synopsis</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#options">Options</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#portability">Portability</a></li>
</ul><h3>See also</h3><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="synopsis" id="synopsis">Synopsis</a></h2>

     <p><code><strong>rotatelogs</strong>
     [ -<strong>l</strong> ]
     [ -<strong>L</strong> <var>linkname</var> ]
     [ -<strong>p</strong> <var>program</var> ]
     [ -<strong>f</strong> ]
     [ -<strong>t</strong> ]
     [ -<strong>v</strong> ]
     [ -<strong>e</strong> ]
     [ -<strong>c</strong> ]
     [ -<strong>n</strong> <var>number-of-files</var> ]
     <var>logfile</var>
     <var>rotationtime</var>|<var>filesize</var>(B|K|M|G)
     [ <var>offset</var> ]</code></p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="options" id="options">Options</a></h2>

<dl>

<dt><code>-l</code></dt>
<dd>Causes the use of local time rather than GMT as the base for the
interval or for <code>strftime(3)</code> formatting with size-based
rotation.</dd>

<dt><code>-L</code> <var>linkname</var></dt>
<dd>Causes a hard link to be made from the current logfile
to the specified link name.  This can be used to watch
the log continuously across rotations using a command like
<code>tail -F linkname</code>.</dd>

<dt><code>-p</code> <var>program</var></dt>

<dd>If given, <code>rotatelogs</code> will execute the specified
program every time a new log file is opened.  The filename of the
newly opened file is passed as the first argument to the program.  If
executing after a rotation, the old log file is passed as the second
argument.  <code>rotatelogs</code> does not wait for the specified
program to terminate before continuing to operate, and will not log
any error code returned on termination.  The spawned program uses the
same stdin, stdout, and stderr as rotatelogs itself, and also inherits
the environment.</dd>

<dt><code>-f</code></dt>
<dd>Causes the logfile to be opened immediately, as soon as
<code>rotatelogs</code> starts, instead of waiting for the
first logfile entry to be read (for non-busy sites, there may be
a substantial delay between when the server is started
and when the first request is handled, meaning that the
associated logfile does not "exist" until then, which
causes problems from some automated logging tools)</dd>

<dt><code>-t</code></dt>
<dd>Causes the logfile to be truncated instead of rotated. This is
useful when a log is processed in real time by a command like tail,
and there is no need for archived data. No suffix will be added to
the filename, however format strings containing '%' characters
will be respected.
</dd>

<dt><code>-v</code></dt>
<dd>Produce verbose output on STDERR. The output contains
the result of the configuration parsing, and all file open and
close actions.</dd>

<dt><code>-e</code></dt>
<dd>Echo logs through to stdout. Useful when logs need to be further
processed in real time by a further tool in the chain.</dd>

<dt><code>-c</code></dt>
<dd>Create log file for each interval, even if empty.</dd>

<dt><code>-n <var>number-of-files</var></code></dt>
<dd>Use a circular list of filenames without timestamps.
With -n 3, the series of log files opened would be
"logfile", "logfile.1", "logfile.2", then overwriting "logfile".
Available in 2.4.5 and later.</dd>

<dt><code><var>logfile</var></code></dt>

<dd><p>The path plus basename of the logfile.  If <var>logfile</var>
includes any '%' characters, it is treated as a format string for
<code>strftime(3)</code>.  Otherwise, the suffix
<var>.nnnnnnnnnn</var> is automatically added and is the time in
seconds (unless the -t option is used). Both formats compute the
start time from the beginning of the current period.  For example,
if a rotation time of 86400 is specified, the hour, minute, and
second fields created from the <code>strftime(3)</code> format will
all be zero, referring to the beginning of the current 24-hour
period (midnight).</p>
<p>When using <code>strftime(3)</code> filename formatting,
be sure the log file format has enough granularity to produce
a different file name each time the logs are rotated.  Otherwise
rotation will overwrite the same file instead of starting a new
one.  For example, if <var>logfile</var> was
<code>/var/log/errorlog.%Y-%m-%d</code> with log rotation at 5
megabytes, but 5 megabytes was reached twice in the same day, the
same log file name would be produced and log rotation would keep
writing to the same file.</p>
</dd>

<dt><code><var>rotationtime</var></code></dt>

<dd>The time between log file rotations in seconds.  The rotation
occurs at the beginning of this interval.  For example, if the
rotation time is 3600, the log file will be rotated at the beginning
of every hour; if the rotation time is 86400, the log file will be
rotated every night at midnight.  (If no data is logged during an
interval, no file will be created.)</dd>

<dt><code><var>filesize</var>(B|K|M|G)</code></dt>

<dd>The maximum file size in followed by exactly one of the letters
<code>B</code> (Bytes), <code>K</code> (KBytes), <code>M</code> (MBytes)
or <code>G</code> (GBytes).
<p>
When time and size are specified, the size must be given after the time.
Rotation will occur whenever either time or size limits are reached.
</p>
</dd>

<dt><code><var>offset</var></code></dt>

<dd>The number of minutes offset from UTC.  If omitted, zero is
assumed and UTC is used.  For example, to use local time in the zone
UTC -5 hours, specify a value of <code>-300</code> for this argument.
In most cases, <code>-l</code> should be used instead of specifying
an offset.</dd>

</dl>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="examples" id="examples">Examples</a></h2>

<div class="example"><p><code>
     CustomLog "|bin/rotatelogs /var/log/logfile 86400" common
</code></p></div>

     <p>This creates the files /var/log/logfile.nnnn where nnnn  is
     the system time at which the log nominally starts (this time
     will always be a multiple of the rotation time, so  you  can
     synchronize cron scripts with it).  At the end of each rotation
     time (here after 24 hours) a new log is started.</p>

<div class="example"><p><code>
     CustomLog "|bin/rotatelogs -l /var/log/logfile.%Y.%m.%d 86400" common
</code></p></div>

     <p>This creates the files /var/log/logfile.yyyy.mm.dd where
     yyyy is the year, mm is the month, and dd is the day of the month.
     Logging will switch to a new file every day at midnight, local time.</p>

<div class="example"><p><code>
     CustomLog "|bin/rotatelogs /var/log/logfile 5M" common
</code></p></div>

     <p>This configuration will rotate the logfile whenever it reaches
     a size of 5 megabytes.</p>

<div class="example"><p><code>
     ErrorLog "|bin/rotatelogs /var/log/errorlog.%Y-%m-%d-%H_%M_%S 5M"
</code></p></div>
     <p>This configuration will rotate the error logfile whenever it
     reaches a size of 5 megabytes, and the suffix to the logfile name
     will be created of the form
     <code>errorlog.YYYY-mm-dd-HH_MM_SS</code>.</p>

<div class="example"><p><code>
     CustomLog "|bin/rotatelogs -t /var/log/logfile 86400" common
</code></p></div>

     <p>This creates the file /var/log/logfile, truncating the file at
     startup and then truncating the file once per day. It is expected
     in this scenario that a separate process (such as tail) would
     process the file in real time.</p>

</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="portability" id="portability">Portability</a></h2>

<p>The following logfile format string substitutions should be
supported by all <code>strftime(3)</code> implementations, see
the <code>strftime(3)</code> man page for library-specific
extensions.</p>

<table class="bordered"><tr><td><code>%A</code></td><td>full weekday name (localized)</td></tr>
<tr class="odd"><td><code>%a</code></td><td>3-character weekday name (localized)</td></tr>
<tr><td><code>%B</code></td><td>full month name (localized)</td></tr>
<tr class="odd"><td><code>%b</code></td><td>3-character month name (localized)</td></tr>
<tr><td><code>%c</code></td><td>date and time (localized)</td></tr>
<tr class="odd"><td><code>%d</code></td><td>2-digit day of month</td></tr>
<tr><td><code>%H</code></td><td>2-digit hour (24 hour clock)</td></tr>
<tr class="odd"><td><code>%I</code></td><td>2-digit hour (12 hour clock)</td></tr>
<tr><td><code>%j</code></td><td>3-digit day of year</td></tr>
<tr class="odd"><td><code>%M</code></td><td>2-digit minute</td></tr>
<tr><td><code>%m</code></td><td>2-digit month</td></tr>
<tr class="odd"><td><code>%p</code></td><td>am/pm of 12 hour clock (localized)</td></tr>
<tr><td><code>%S</code></td><td>2-digit second</td></tr>
<tr class="odd"><td><code>%U</code></td><td>2-digit week of year
(Sunday first day of week)</td></tr>
<tr><td><code>%W</code></td><td>2-digit week of year
(Monday first day of week)</td></tr>
<tr class="odd"><td><code>%w</code></td><td>1-digit weekday
(Sunday first day of week)</td></tr>
<tr><td><code>%X</code></td><td>time (localized)</td></tr>
<tr class="odd"><td><code>%x</code></td><td>date (localized)</td></tr>
<tr><td><code>%Y</code></td><td>4-digit year</td></tr>
<tr class="odd"><td><code>%y</code></td><td>2-digit year</td></tr>
<tr><td><code>%Z</code></td><td>time zone name</td></tr>
<tr class="odd"><td><code>%%</code></td><td>literal `%'</td></tr>
</table>

</div></div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/programs/rotatelogs.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/programs/rotatelogs.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
<a href="../ko/programs/rotatelogs.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
<a href="../tr/programs/rotatelogs.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
</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&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again 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 Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
<script type="text/javascript"><!--//--><![CDATA[//><!--
var comments_shortname = 'httpd';
var comments_identifier = 'http://httpd.apache.org/docs/2.4/programs/rotatelogs.html';
(function(w, d) {
    if (w.location.hostname.toLowerCase() == "httpd.apache.org") {
        d.write('<div id="comments_thread"><\/div>');
        var s = d.createElement('script');
        s.type = 'text/javascript';
        s.async = true;
        s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
        (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
    }
    else { 
        d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>');
    }
})(window, document);
//--><!]]></script></div><div id="footer">
<p class="apache">Copyright 2017 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.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></div><script type="text/javascript"><!--//--><![CDATA[//><!--
if (typeof(prettyPrint) !== 'undefined') {
    prettyPrint();
}
//--><!]]></script>
</body></html>