summaryrefslogtreecommitdiffstats
path: root/docs/manual/upgrading.html.en
blob: 55ed56e0edd794832848ff10dec4e30652df6b0a (plain)
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
<?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><!--
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
              This file is generated from xml source: DO NOT EDIT
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
      -->
<title>Upgrading to 2.4 from 2.2 - Apache HTTP Server</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 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="./faq/">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.3</p>
<img alt="" src="./images/feather.gif" /></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 2.3</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">&nbsp;en&nbsp;</a> |
<a href="./fr/upgrading.html" hreflang="fr" rel="alternate" title="Fran�ais">&nbsp;fr&nbsp;</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"><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></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: the "most" module set gets built by default</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>

    <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>

      <p>Here are some examples of old and new ways to do the same
      access control.</p>

      <p>In this example, all requests are denied.</p>
      <div class="example"><h3>2.2 configuration:</h3><p><code>
        
        Order deny,allow<br />
        Deny from all
      </code></p></div>
      <div class="example"><h3>2.4 configuration:</h3><p><code>
        
        Require all denied
      </code></p></div>

      <p>In this example, all requests are allowed.</p>
      <div class="example"><h3>2.2 configuration:</h3><p><code>
        
        Order allow,deny<br />
        Allow from all
      </code></p></div>
      <div class="example"><h3>2.4 configuration:</h3><p><code>
        
        Require all granted
      </code></p></div>

      <p>In the following example, 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><p><code>
        
        Order Deny,Allow<br />
        Deny from all<br />
        Allow from example.org
      </code></p></div>
      <div class="example"><h3>2.4 configuration:</h3><p><code>
        
        Require host example.org
      </code></p></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>,
        which describes more accurately what it does.</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#enablesendfile">EnableSendfile</a></code> now
        defaults to Off.</li>

        <li><code class="module"><a href="./mod/mod_log_config.html">mod_log_config</a></code>: <a href="modules/mod_log_config.html#formats">${cookie}C</a>
        matches whole cookie names.  Previously any substring would
        match.</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/dav_fs.html#davlockdb">DavLockDB</a></code> file has changed for
        systems with inodes.  The old <code class="directive"><a href="./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/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_ldap.html">mod_ldap</a></code>: <code class="directive"><a href="./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/filter.html#filterprovider">FilterProvider</a></code> syntax has changed and
        now uses a boolean expression to determine if a filter is applied.
        </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_auto_index.html">mod_auto_index</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>.</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>
    </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>
    </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>
    </ul>
    </li>
</ul>
  </div></div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="./en/upgrading.html" title="English">&nbsp;en&nbsp;</a> |
<a href="./fr/upgrading.html" hreflang="fr" rel="alternate" title="Fran�ais">&nbsp;fr&nbsp;</a></p>
</div><div id="footer">
<p class="apache">Copyright 2011 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="./faq/">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p></div>
</body></html>