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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
| commit | 6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch) | |
| tree | 1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/upgrading.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-upstream.tar.xz apache2-upstream.zip | |
Adding upstream version 2.4.57.upstream/2.4.57upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/manual/upgrading.html.en')
| -rw-r--r-- | docs/manual/upgrading.html.en | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/docs/manual/upgrading.html.en b/docs/manual/upgrading.html.en new file mode 100644 index 0000000..b6b305e --- /dev/null +++ b/docs/manual/upgrading.html.en @@ -0,0 +1,537 @@ +<?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"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>Upgrading to 2.4 from 2.2 - 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="<-" alt="<-" src="./images/left.gif" /></a></div> +<div id="path"> +<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 2.4</a></div><div id="page-content"><div id="preamble"><h1>Upgrading to 2.4 from 2.2</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="./en/upgrading.html" title="English"> en </a> | +<a href="./fr/upgrading.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> + + <p>In order to assist folks upgrading, we maintain a document + describing information critical to existing Apache HTTP Server users. These + are intended to be brief notes, and you should be able to find + more information in either the <a href="new_features_2_4.html">New Features</a> document, or in + the <code>src/CHANGES</code> file. Application and module developers + can find a summary of API changes in the <a href="developer/new_api_2_4.html">API updates</a> overview.</p> + + <p>This document describes changes in server behavior that might + require you to change your configuration or how you use the server + in order to continue using 2.4 as you are currently using 2.2. + To take advantage of new features in 2.4, see the New Features + document.</p> + + <p>This document describes only the changes from 2.2 to 2.4. If you + are upgrading from version 2.0, you should also consult the <a href="http://httpd.apache.org/docs/2.2/upgrading.html">2.0 to 2.2 + upgrading document.</a></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="#compile-time">Compile-Time Configuration Changes</a></li> +<li><img alt="" src="./images/down.gif" /> <a href="#run-time">Run-Time Configuration Changes</a></li> +<li><img alt="" src="./images/down.gif" /> <a href="#misc">Misc Changes</a></li> +<li><img alt="" src="./images/down.gif" /> <a href="#third-party">Third Party Modules</a></li> +<li><img alt="" src="./images/down.gif" /> <a href="#commonproblems">Common problems when upgrading</a></li> +</ul><h3>See also</h3><ul class="seealso"><li><a href="new_features_2_4.html">Overview of new features in + Apache HTTP Server 2.4</a></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="section"> +<h2><a name="compile-time" id="compile-time">Compile-Time Configuration Changes</a></h2> + + + <p>The compilation process is very similar to the one used in + version 2.2. Your old <code>configure</code> command line (as + found in <code>build/config.nice</code> in the installed server + directory) can be used in most cases. There are some changes in + the default settings. Some details of changes:</p> + + <ul> + <li>These modules have been removed: mod_authn_default, + mod_authz_default, mod_mem_cache. If you were using + mod_mem_cache in 2.2, look at <code class="module"><a href="./mod/mod_cache_disk.html">mod_cache_disk</a></code> in + 2.4.</li> + + <li>All load balancing implementations have been moved to + individual, self-contained mod_proxy submodules, e.g. + <code class="module"><a href="./mod/mod_lbmethod_bybusyness.html">mod_lbmethod_bybusyness</a></code>. You might need + to build and load any of these that your configuration + uses.</li> + + <li>Platform support has been removed for BeOS, TPF, and + even older platforms such as A/UX, Next, and Tandem. These were + believed to be broken anyway.</li> + + <li>configure: dynamic modules (DSO) are built by default</li> + + <li>configure: By default, only a basic set of modules is loaded. The + other <code class="directive">LoadModule</code> directives are commented + out in the configuration file.</li> + + <li>configure: the "most" module set gets built by default</li> + + <li>configure: the "reallyall" module set adds developer modules + to the "all" set</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="run-time" id="run-time">Run-Time Configuration Changes</a></h2> + + <p>There have been significant changes in authorization configuration, + and other minor configuration changes, that could require changes to your 2.2 + configuration files before using them for 2.4.</p> + + <h3><a name="authz" id="authz">Authorization</a></h3> + + + <p>Any configuration file that uses authorization will likely + need changes.</p> + + <p>You should review the <a href="howto/auth.html">Authentication, + Authorization and Access Control Howto</a>, especially the section + <a href="howto/auth.html#beyond">Beyond just authorization</a> + which explains the new mechanisms for controlling the order in + which the authorization directives are applied.</p> + + <p>Directives that control how authorization modules respond when they don't match + the authenticated user have been removed: This includes + AuthzLDAPAuthoritative, AuthzDBDAuthoritative, AuthzDBMAuthoritative, + AuthzGroupFileAuthoritative, AuthzUserAuthoritative, + and AuthzOwnerAuthoritative. These directives have been replaced by the + more expressive <code class="directive"><a href="./mod/mod_authz_core.html#requireany">RequireAny</a></code>, + <code class="directive"><a href="./mod/mod_authz_core.html#requirenone">RequireNone</a></code>, and + <code class="directive"><a href="./mod/mod_authz_core.html#requireall">RequireAll</a></code>.</p> + + <p>If you use <code class="module"><a href="./mod/mod_authz_dbm.html">mod_authz_dbm</a></code>, you must port your + configuration to use <code>Require dbm-group ...</code> in place + of <code>Require group ...</code>.</p> + + <h4><a name="access" id="access">Access control</a></h4> + + + <p>In 2.2, access control based on client hostname, IP address, + and other characteristics of client requests was done using the + directives <code class="directive"><a href="./mod/mod_access_compat.html#order">Order</a></code>, <code class="directive"><a href="./mod/mod_access_compat.html#allow">Allow</a></code>, <code class="directive"><a href="./mod/mod_access_compat.html#deny">Deny</a></code>, and <code class="directive"><a href="./mod/mod_access_compat.html#satisfy">Satisfy</a></code>.</p> + + <p>In 2.4, such access control is done in the same way as other + authorization checks, using the new module + <code class="module"><a href="./mod/mod_authz_host.html">mod_authz_host</a></code>. The old access control idioms + should be replaced by the new authentication mechanisms, + although for compatibility with old configurations, the new + module <code class="module"><a href="./mod/mod_access_compat.html">mod_access_compat</a></code> is provided.</p> + + <div class="note"><h3>Mixing old and new directives</h3> + <p>Mixing old directives like <code class="directive"><a href="./mod/mod_access_compat.html#order">Order</a></code>, <code class="directive"><a href="./mod/mod_access_compat.html#allow">Allow</a></code> or <code class="directive"><a href="./mod/mod_access_compat.html#deny">Deny</a></code> with new ones like + <code class="directive"><a href="./mod/mod_authz_core.html#require">Require</a></code> is technically possible + but discouraged. <code class="module"><a href="./mod/mod_access_compat.html">mod_access_compat</a></code> was created to support + configurations containing only old directives to facilitate the 2.4 upgrade. + Please check the examples below to get a better idea about issues that might arise. + </p> + </div> + + <p>Here are some examples of old and new ways to do the same + access control.</p> + + <p>In this example, there is no authentication and all requests are denied.</p> + <div class="example"><h3>2.2 configuration:</h3><pre class="prettyprint lang-config">Order deny,allow +Deny from all</pre> +</div> + <div class="example"><h3>2.4 configuration:</h3><pre class="prettyprint lang-config">Require all denied</pre> +</div> + + <p>In this example, there is no authentication and all requests are allowed.</p> + <div class="example"><h3>2.2 configuration:</h3><pre class="prettyprint lang-config">Order allow,deny +Allow from all</pre> +</div> + <div class="example"><h3>2.4 configuration:</h3><pre class="prettyprint lang-config">Require all granted</pre> +</div> + + <p>In the following example, there is no authentication and all hosts in the example.org domain + are allowed access; all other hosts are denied access.</p> + + <div class="example"><h3>2.2 configuration:</h3><pre class="prettyprint lang-config">Order Deny,Allow +Deny from all +Allow from example.org</pre> +</div> + <div class="example"><h3>2.4 configuration:</h3><pre class="prettyprint lang-config">Require host example.org</pre> +</div> + + <p>In the following example, mixing old and new directives leads to + unexpected results.</p> + + <div class="example"><h3>Mixing old and new directives: NOT WORKING AS EXPECTED</h3><pre class="prettyprint lang-config">DocumentRoot "/var/www/html" + +<Directory "/"> + AllowOverride None + Order deny,allow + Deny from all +</Directory> + +<Location "/server-status"> + SetHandler server-status + Require local +</Location> + +access.log - GET /server-status 403 127.0.0.1 +error.log - AH01797: client denied by server configuration: /var/www/html/server-status</pre> +</div> + <p>Why httpd denies access to servers-status even if the configuration seems to allow it? + Because <code class="module"><a href="./mod/mod_access_compat.html">mod_access_compat</a></code> directives take precedence + over the <code class="module"><a href="./mod/mod_authz_host.html">mod_authz_host</a></code> one in this configuration + <a href="sections.html#merging">merge</a> scenario.</p> + + <p>This example conversely works as expected:</p> + + <div class="example"><h3>Mixing old and new directives: WORKING AS EXPECTED</h3><pre class="prettyprint lang-config">DocumentRoot "/var/www/html" + +<Directory "/"> + AllowOverride None + Require all denied +</Directory> + +<Location "/server-status"> + SetHandler server-status + Order deny,allow + Deny from all + Allow From 127.0.0.1 +</Location> + +access.log - GET /server-status 200 127.0.0.1</pre> +</div> + <p>So even if mixing configuration is still + possible, please try to avoid it when upgrading: either keep old directives and then migrate + to the new ones on a later stage or just migrate everything in bulk. + </p> + + + <p>In many configurations with authentication, where the value of the + <code class="directive">Satisfy</code> was the default of <em>ALL</em>, snippets + that simply disabled host-based access control are omitted:</p> + + <div class="example"><h3>2.2 configuration:</h3><pre class="prettyprint lang-config"># 2.2 config that disables host-based access control and uses only authentication +Order Deny,Allow +Allow from all +AuthType Basic +AuthBasicProvider file +AuthUserFile /example.com/conf/users.passwd +AuthName secure +Require valid-user</pre> +</div> + <div class="example"><h3>2.4 configuration:</h3><pre class="prettyprint lang-config"># No replacement of disabling host-based access control needed +AuthType Basic +AuthBasicProvider file +AuthUserFile /example.com/conf/users.passwd +AuthName secure +Require valid-user</pre> +</div> + + <p>In configurations where both authentication and access control were meaningfully combined, the + access control directives should be migrated. This example allows requests meeting <em>both</em> criteria:</p> + <div class="example"><h3>2.2 configuration:</h3><pre class="prettyprint lang-config">Order allow,deny +Deny from all +# Satisfy ALL is the default +Satisfy ALL +Allow from 127.0.0.1 +AuthType Basic +AuthBasicProvider file +AuthUserFile /example.com/conf/users.passwd +AuthName secure +Require valid-user</pre> +</div> + <div class="example"><h3>2.4 configuration:</h3><pre class="prettyprint lang-config">AuthType Basic +AuthBasicProvider file +AuthUserFile /example.com/conf/users.passwd +AuthName secure +<RequireAll> + Require valid-user + Require ip 127.0.0.1 +</RequireAll></pre> +</div> + + <p>In configurations where both authentication and access control were meaningfully combined, the + access control directives should be migrated. This example allows requests meeting <em>either</em> criteria:</p> + <div class="example"><h3>2.2 configuration:</h3><pre class="prettyprint lang-config">Order allow,deny +Deny from all +Satisfy any +Allow from 127.0.0.1 +AuthType Basic +AuthBasicProvider file +AuthUserFile /example.com/conf/users.passwd +AuthName secure +Require valid-user</pre> +</div> + <div class="example"><h3>2.4 configuration:</h3><pre class="prettyprint lang-config">AuthType Basic +AuthBasicProvider file +AuthUserFile /example.com/conf/users.passwd +AuthName secure +# Implicitly <RequireAny> +Require valid-user +Require ip 127.0.0.1</pre> +</div> + + + + <h3><a name="config" id="config">Other configuration changes</a></h3> + + + <p>Some other small adjustments may be necessary for particular + configurations as discussed below.</p> + + <ul> + <li><code class="directive">MaxRequestsPerChild</code> has been renamed to + <code class="directive"><a href="./mod/mpm_common.html#maxconnectionsperchild">MaxConnectionsPerChild</a></code>, + describes more accurately what it does. The old name is still + supported.</li> + + <li><code class="directive">MaxClients</code> has been renamed to + <code class="directive"><a href="./mod/mpm_common.html#maxrequestworkers">MaxRequestWorkers</a></code>, + which describes more accurately what it does. For async MPMs, like + <code class="module"><a href="./mod/event.html">event</a></code>, the maximum number of clients is not + equivalent than the number of worker threads. The old name is still + supported.</li> + + <li>The <code class="directive"><a href="./mod/core.html#defaulttype">DefaultType</a></code> + directive no longer has any effect, other than to emit a + warning if it's used with any value other than + <code>none</code>. You need to use other configuration + settings to replace it in 2.4. + </li> + + <li><code class="directive"><a href="./mod/core.html#allowoverride">AllowOverride</a></code> now + defaults to <code>None</code>.</li> + + <li><code class="directive"><a href="./mod/core.html#enablesendfile">EnableSendfile</a></code> now + defaults to Off.</li> + + <li><code class="directive"><a href="./mod/core.html#fileetag">FileETag</a></code> now + defaults to "MTime Size" (without INode).</li> + + <li><code class="module"><a href="./mod/mod_dav_fs.html">mod_dav_fs</a></code>: The format of the <code class="directive"><a href="./mod/mod_dav_fs.html#davlockdb">DavLockDB</a></code> file has changed for + systems with inodes. The old <code class="directive"><a href="./mod/mod_dav_fs.html#davlockdb">DavLockDB</a></code> file must be deleted on + upgrade. + </li> + + <li><code class="directive"><a href="./mod/core.html#keepalive">KeepAlive</a></code> only + accepts values of <code>On</code> or <code>Off</code>. + Previously, any value other than "Off" or "0" was treated as + "On".</li> + + <li>Directives AcceptMutex, LockFile, RewriteLock, SSLMutex, + SSLStaplingMutex, and WatchdogMutexPath have been replaced + with a single <code class="directive"><a href="./mod/core.html#mutex">Mutex</a></code> + directive. You will need to evaluate any use of these removed + directives in your 2.2 configuration to determine if they can + just be deleted or will need to be replaced using <code class="directive"><a href="./mod/core.html#mutex">Mutex</a></code>.</li> + + <li><code class="module"><a href="./mod/mod_cache.html">mod_cache</a></code>: <code class="directive"><a href="./mod/mod_cache.html#cacheignoreurlsessionidentifiers">CacheIgnoreURLSessionIdentifiers</a></code> + now does an exact match against the query string instead of a + partial match. If your configuration was using partial + strings, e.g. using <code>sessionid</code> to match + <code>/someapplication/image.gif;jsessionid=123456789</code>, + then you will need to change to the full string + <code>jsessionid</code>. + </li> + + <li><code class="module"><a href="./mod/mod_cache.html">mod_cache</a></code>: The second parameter to + <code class="directive"><a href="./mod/mod_cache.html#cacheenable">CacheEnable</a></code> only + matches forward proxy content if it begins with the correct + protocol. In 2.2 and earlier, a parameter of '/' matched all + content.</li> + + <li><code class="module"><a href="./mod/mod_ldap.html">mod_ldap</a></code>: <code class="directive"><a href="./mod/mod_ldap.html#ldaptrustedclientcert">LDAPTrustedClientCert</a></code> is now + consistently a per-directory setting only. If you use this + directive, review your configuration to make sure it is + present in all the necessary directory contexts.</li> + + <li><code class="module"><a href="./mod/mod_filter.html">mod_filter</a></code>: <code class="directive"><a href="./mod/mod_filter.html#filterprovider">FilterProvider</a></code> syntax has changed and + now uses a boolean expression to determine if a filter is applied. + </li> + + <li><code class="module"><a href="./mod/mod_include.html">mod_include</a></code>: + <ul> + <li>The <code>#if expr</code> element now uses the new <a href="expr.html">expression parser</a>. The old syntax can be + restored with the new directive <code class="directive"><a href="./mod/mod_include.html#ssilegacyexprparser">SSILegacyExprParser</a></code>. + </li> + <li>An SSI* config directive in directory scope no longer causes + all other per-directory SSI* directives to be reset to their + default values.</li> + </ul> + </li> + + <li><code class="module"><a href="./mod/mod_charset_lite.html">mod_charset_lite</a></code>: The <code>DebugLevel</code> + option has been removed in favour of per-module <code class="directive"><a href="./mod/core.html#loglevel">LogLevel</a></code> configuration. + </li> + + <li><code class="module"><a href="./mod/mod_ext_filter.html">mod_ext_filter</a></code>: The <code>DebugLevel</code> + option has been removed in favour of per-module <code class="directive"><a href="./mod/core.html#loglevel">LogLevel</a></code> configuration. + </li> + + <li><code class="module"><a href="./mod/mod_proxy_scgi.html">mod_proxy_scgi</a></code>: The default setting for + <code>PATH_INFO</code> has changed from httpd 2.2, and + some web applications will no longer operate properly with + the new <code>PATH_INFO</code> setting. The previous setting + can be restored by configuring the <code>proxy-scgi-pathinfo</code> + variable.</li> + + <li><code class="module"><a href="./mod/mod_ssl.html">mod_ssl</a></code>: CRL based revocation checking + now needs to be explicitly configured through <code class="directive"><a href="./mod/mod_ssl.html#sslcarevocationcheck">SSLCARevocationCheck</a></code>. + </li> + + <li><code class="module"><a href="./mod/mod_substitute.html">mod_substitute</a></code>: The maximum line length is now + limited to 1MB. + </li> + + <li><code class="module"><a href="./mod/mod_reqtimeout.html">mod_reqtimeout</a></code>: If the module is loaded, it + will now set some default timeouts.</li> + + <li><code class="module"><a href="./mod/mod_dumpio.html">mod_dumpio</a></code>: <code class="directive">DumpIOLogLevel</code> + is no longer supported. Data is always logged at <code class="directive"><a href="./mod/core.html#loglevel">LogLevel</a></code> <code>trace7</code>.</li> + + <li>On Unix platforms, piped logging commands configured using + either <code class="directive"><a href="./mod/core.html#errorlog">ErrorLog</a></code> or + <code class="directive"><a href="./mod/mod_log_config.html#customlog">CustomLog</a></code> were invoked using + <code>/bin/sh -c</code> in 2.2 and earlier. In 2.4 and later, + piped logging commands are executed directly. To restore the + old behaviour, see the <a href="logs.html#piped">piped logging + documentation</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="misc" id="misc">Misc Changes</a></h2> + + + <ul> + <li><code class="module"><a href="./mod/mod_autoindex.html">mod_autoindex</a></code>: will now extract titles and + display descriptions for .xhtml files, which were previously + ignored.</li> + + <li><code class="module"><a href="./mod/mod_ssl.html">mod_ssl</a></code>: The default format of the <code>*_DN</code> + variables has changed. The old format can still be used with the new + <code>LegacyDNStringFormat</code> argument to <code class="directive"><a href="./mod/mod_ssl.html#ssloptions">SSLOptions</a></code>. The SSLv2 protocol is + no longer supported. <code class="directive"><a href="./mod/mod_ssl.html#sslproxycheckpeercn">SSLProxyCheckPeerCN + </a></code> and <code class="directive"><a href="./mod/mod_ssl.html#sslproxycheckpeerexpire">SSLProxyCheckPeerExpire + </a></code> now default to On, causing proxy requests to HTTPS hosts + with bad or outdated certificates to fail with a 502 status code (Bad + gateway)</li> + + <li><code class="program"><a href="./programs/htpasswd.html">htpasswd</a></code> now uses MD5 hash by default on + all platforms.</li> + + <li>The <code class="directive"><a href="./mod/core.html#namevirtualhost">NameVirtualHost</a></code> + directive no longer has any effect, other than to emit a + warning. Any address/port combination appearing in multiple + virtual hosts is implicitly treated as a name-based virtual host. + </li> + + <li><code class="module"><a href="./mod/mod_deflate.html">mod_deflate</a></code> will now skip compression if it knows + that the size overhead added by the compression is larger than the data + to be compressed. + </li> + + <li>Multi-language error documents from 2.2.x may not work unless + they are adjusted to the new syntax of <code class="module"><a href="./mod/mod_include.html">mod_include</a></code>'s + <code>#if expr=</code> element or the directive + <code class="directive"><a href="./mod/mod_include.html#ssilegacyexprparser">SSILegacyExprParser</a></code> is + enabled for the directory containing the error documents. + </li> + + <li>The functionality provided by <code>mod_authn_alias</code> + in previous versions (i.e., the <code class="directive"><a href="./mod/mod_authn_core.html#authnprovideralias">AuthnProviderAlias</a></code> directive) + has been moved into <code class="module"><a href="./mod/mod_authn_core.html">mod_authn_core</a></code>. + </li> + + <li>The RewriteLog and RewriteLogLevel directives have been removed. + This functionality is now provided by configuring the appropriate + level of logging for the <code class="module"><a href="./mod/mod_rewrite.html">mod_rewrite</a></code> module using + the <code class="directive"><a href="./mod/core.html#loglevel">LogLevel</a></code> directive. + See also the <a href="mod/mod_rewrite.html#logging">mod_rewrite logging</a> + section.</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="third-party" id="third-party">Third Party Modules</a></h2> + + <p>All modules must be recompiled for 2.4 before being loaded.</p> + + <p>Many third-party modules designed for version 2.2 will + otherwise work unchanged with the Apache HTTP Server version 2.4. + Some will require changes; see the <a href="developer/new_api_2_4.html">API + update</a> overview.</p> + </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> +<div class="section"> +<h2><a name="commonproblems" id="commonproblems">Common problems when upgrading</a></h2> + + <ul><li>Startup errors: + <ul> + <li><code>Invalid command 'User', perhaps misspelled or defined by a module not included in the server configuration</code> - load module <code class="module"><a href="./mod/mod_unixd.html">mod_unixd</a></code></li> + <li><code>Invalid command 'Require', perhaps misspelled or defined by a module not included in the server configuration</code>, or +<code>Invalid command 'Order', perhaps misspelled or defined by a module not included in the server configuration</code> + - load module <code class="module"><a href="./mod/mod_access_compat.html">mod_access_compat</a></code>, or update configuration to 2.4 authorization directives.</li> + <li><code>Ignoring deprecated use of DefaultType in line NN of /path/to/httpd.conf</code> - remove <code class="directive"><a href="./mod/core.html#defaulttype">DefaultType</a></code> + and replace with other configuration settings.</li> + <li><code>Invalid command 'AddOutputFilterByType', perhaps misspelled + or defined by a module not included in the server configuration + </code> - <code class="directive"><a href="./mod/mod_filter.html#addoutputfilterbytype">AddOutputFilterByType</a></code> + has moved from the core to mod_filter, which must be loaded.</li> + </ul></li> + <li>Errors serving requests: + <ul> + <li><code>configuration error: couldn't check user: /path</code> - + load module <code class="module"><a href="./mod/mod_authn_core.html">mod_authn_core</a></code>.</li> + <li><code>.htaccess</code> files aren't being processed - Check for an + appropriate <code class="directive"><a href="./mod/core.html#allowoverride">AllowOverride</a></code> directive; + the default changed to <code>None</code> in 2.4.</li> + </ul> + </li> +</ul> + </div></div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="./en/upgrading.html" title="English"> en </a> | +<a href="./fr/upgrading.html" hreflang="fr" rel="alternate" title="Français"> fr </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&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. 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