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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
commitfe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch)
treeb80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /docs/manual/mod/mod_proxy_express.html.en
parentInitial commit. (diff)
downloadapache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz
apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.zip
Adding upstream version 2.4.56.upstream/2.4.56upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<?xml version="1.0" encoding="UTF-8"?>
+<!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_proxy_express - Apache HTTP Server Version 2.4</title>
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+<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="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_proxy_express</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_express.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_proxy_express.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Dynamic mass reverse proxy extension for
+<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_express_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_express.c</td></tr>
+<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.13 and later</td></tr></table>
+<h3>Summary</h3>
+
+ <p>This module creates dynamically configured mass reverse
+ proxies, by mapping the <code>Host:</code> header of the HTTP request to
+ a server name and backend URL stored in a DBM file.
+ This allows for easy use of a huge number of reverse proxies
+ with no configuration changes. It is much less feature-full
+ than <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code>, which also provides
+ dynamic growth, but is intended to handle much, much
+ larger numbers of backends. It is ideally suited as a
+ front-end HTTP switch and for micro-services architectures.</p>
+
+ <p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>.</p>
+
+ <div class="warning"><h3>Warning</h3>
+ <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
+ servers are dangerous both to your network and to the Internet at
+ large.</p>
+ </div>
+
+<div class="note"><h3>Limitations</h3>
+ <ul>
+ <li>This module is not intended to replace the dynamic capability of
+ <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code>. Instead, it is intended to be mostly
+ a lightweight and fast alternative to using <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>
+ with <code class="directive"><a href="../mod/mod_rewrite.html#rewritemap">RewriteMap</a></code> and the
+ <code>[P]</code> flag for mapped reverse proxying.
+ </li>
+ <li>It does not support regex or pattern matching at all.
+ </li>
+ <li>It emulates:
+ <pre class="prettyprint lang-config">&lt;VirtualHost *:80&gt;
+ ServerName front.end.server
+ ProxyPass "/" "back.end.server:port"
+ ProxyPassReverse "/" "back.end.server:port"
+&lt;/VirtualHost&gt;</pre>
+
+ That is, the entire URL is appended to the mapped backend
+ URL. This is in keeping with the intent of being a simple
+ but fast reverse proxy switch.
+ </li>
+ </ul>
+</div>
+
+</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><h3 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#proxyexpressdbmfile">ProxyExpressDBMFile</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#proxyexpressdbmtype">ProxyExpressDBMType</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#proxyexpressenable">ProxyExpressEnable</a></li>
+</ul>
+<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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_proxy_express">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_proxy_express">Report a bug</a></li></ul><h3>See also</h3>
+<ul class="seealso">
+<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
+<li><code class="directive"><a href="../mod/mod_proxy.html#balancermember">BalancerMember</a></code></li>
+<li><code class="directive"><a href="../mod/mod_proxy.html#balancergrowth">BalancerGrowth</a></code></li>
+<li><code class="directive"><a href="../mod/mod_proxy.html#balancerpersist">BalancerPersist</a></code></li>
+<li><code class="directive"><a href="../mod/mod_proxy.html#balancerinherit">BalancerInherit</a></code></li>
+<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="directive-section"><h2><a name="ProxyExpressDBMFile" id="ProxyExpressDBMFile">ProxyExpressDBMFile</a> <a name="proxyexpressdbmfile" id="proxyexpressdbmfile">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Pathname to DBM file.</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyExpressDBMFile <var>pathname</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_express</td></tr>
+</table>
+ <p>The <code class="directive">ProxyExpressDBMFile</code> directive
+ points to the location of the Express map DBM file. This
+ file serves to map the incoming server name, obtained from
+ the <code>Host:</code> header, to a backend URL.</p>
+
+ <div class="note"><h3>Note</h3>
+ <p>The file is constructed from a plain text file format using
+ the <code><a href="../programs/httxt2dbm.html">httxt2dbm</a></code>
+ utility.</p>
+
+ <div class="example"><h3>ProxyExpress map file</h3><p><code>
+ ##<br />
+ ##express-map.txt:<br />
+ ##<br />
+ <br />
+ www1.example.com http://192.168.211.2:8080<br />
+ www2.example.com http://192.168.211.12:8088<br />
+ www3.example.com http://192.168.212.10<br />
+ </code></p></div>
+
+ <div class="example"><h3>Create DBM file</h3><p><code>
+ httxt2dbm -i express-map.txt -o emap<br />
+ </code></p></div>
+
+ <div class="example"><h3>Configuration</h3><pre class="prettyprint lang-config">ProxyExpressEnable on
+ProxyExpressDBMFile emap</pre>
+</div>
+ </div>
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="ProxyExpressDBMType" id="ProxyExpressDBMType">ProxyExpressDBMType</a> <a name="proxyexpressdbmtype" id="proxyexpressdbmtype">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>DBM type of file.</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyExpressDBMType <var>type</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyExpressDBMType default</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_express</td></tr>
+</table>
+ <p>The <code class="directive">ProxyExpressDBMType</code> directive
+ controls the DBM type expected by the module. The default
+ is the default DBM type created with <code>
+ <a href="../programs/httxt2dbm.html">httxt2dbm</a></code>.</p>
+ <p>Possible values are (not all may be available at run time):</p>
+<table class="bordered"><tr class="header"><th>Value</th><th>Description</th></tr>
+<tr><td><code>db</code></td><td> Berkeley DB files</td></tr>
+<tr class="odd"><td><code>gdbm</code></td><td> GDBM files</td></tr>
+<tr><td><code>ndbm</code></td><td> NDBM files</td></tr>
+<tr class="odd"><td><code>sdbm</code></td><td> SDBM files (always available)</td></tr>
+<tr><td><code>default</code></td><td> default DBM type</td></tr>
+</table>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="ProxyExpressEnable" id="ProxyExpressEnable">ProxyExpressEnable</a> <a name="proxyexpressenable" id="proxyexpressenable">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable the module functionality.</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyExpressEnable on|off</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyExpressEnable off</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_express</td></tr>
+</table>
+ <p>The <code class="directive">ProxyExpressEnable</code> directive
+ controls whether the module will be active.</p>
+
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_express.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_proxy_express.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&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 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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