Changes between Version 2 and Version 3 of TracModPython
- Timestamp:
- Sep 9, 2012, 11:47:55 PM (11 years ago)
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TracModPython
v2 v3 4 4 Trac supports [http://www.modpython.org/ mod_python], which speeds up Trac's response times considerably, especially compared to [TracCgi CGI], and permits use of many Apache features not possible with [wiki:TracStandalone tracd]/mod_proxy. 5 5 6 These instructions are for Apache 2; if you are still using Apache 1.3, you may have some luck with [wiki:TracModPython2.7 TracModPython2.7]. 7 8 == Simple configuration == 6 {{{#!div class="important" 7 ** A Word of Warning ** 8 9 As of 16^th^ June 2010, the mod_python project is officially dead. If you are considering using mod_python for a new installation, '''please don't'''! There are known issues which will not be fixed and there are now better alternatives. Check out the main TracInstall pages for your target version for more information. 10 }}} 11 12 13 These instructions are for Apache 2; if you are still using Apache 1.3, you may have some luck with [trac:wiki:TracModPython2.7 TracModPython2.7], but you'll be totally on your own. 14 15 [[PageOutline(2-3,Overview,inline)]] 16 17 == Simple configuration: single project == #Simpleconfiguration 9 18 10 19 If you just installed mod_python, you may have to add a line to load the module in the Apache configuration: … … 13 22 }}} 14 23 15 ''Note: The exact path to the module depends on how the HTTPD installation is laid out.'' 24 ''Note: The exact path to the module depends on how the HTTPD installation is laid out.'' 25 16 26 On Debian using apt-get 17 27 {{{ … … 20 30 (Still on Debian) after you have installed mod_python, you must enable the modules in apache2 (equivalent of the above Load Module directive): 21 31 {{{ 22 a2enmod mod_python32 a2enmod python 23 33 }}} 24 34 On Fedora use, using yum: … … 33 43 PythonInterpreter main_interpreter 34 44 PythonHandler mod_python.testhandler 45 Order allow,deny 46 Allow from all 35 47 </Location> 36 48 }}} … … 45 57 PythonOption TracEnv /var/trac/myproject 46 58 PythonOption TracUriRoot /projects/myproject 59 Order allow,deny 60 Allow from all 47 61 </Location> 48 62 }}} … … 54 68 # For a single project 55 69 PythonOption TracEnv /var/trac/myproject 70 56 71 # For multiple projects 57 72 PythonOption TracEnvParentDir /var/trac/myprojects 73 58 74 # For the index of multiple projects 59 PythonOption TracEnvIndexTemplate /srv/www/htdocs/trac/project_list_tepmlate.html 75 PythonOption TracEnvIndexTemplate /srv/www/htdocs/trac/project_list_template.html 76 60 77 # A space delimitted list, with a "," between key and value pairs. 61 78 PythonOption TracTemplateVars key1,val1 key2,val2 79 62 80 # Useful to get the date in the wanted order 63 81 PythonOption TracLocale en_GB.UTF8 82 64 83 # See description above 65 84 PythonOption TracUriRoot /projects/myproject 66 # Override default python egg cache location 67 PythonOption PYTHON_EGG_CACHE /var/trac/myprojects/egg-cache 68 }}} 85 }}} 86 87 === Python Egg Cache === 88 89 Compressed python eggs like Genshi are normally extracted into a directory named `.python-eggs` in the users home directory. Since apache's home usually is not writable an alternate egg cache directory can be specified like this: 90 {{{ 91 PythonOption PYTHON_EGG_CACHE /var/trac/myprojects/egg-cache 92 }}} 93 94 or you can uncompress the Genshi egg to resolve problems extracting from it. 69 95 70 96 === Configuring Authentication === 71 97 72 Creating password files and configuring authentication works similar to the process for [wiki:TracCgi#AddingAuthentication CGI]: 73 {{{ 74 #!xml 75 <Location /projects/myproject/login> 76 AuthType Basic 77 AuthName "myproject" 78 AuthUserFile /var/trac/myproject/.htpasswd 79 Require valid-user 80 </Location> 81 }}} 82 83 Configuration for mod_ldap authentication in Apache is a bit tricky (httpd 2.2.x and OpenLDAP: slapd 2.3.19) 84 85 1. You need to load the following modules in Apache httpd.conf 86 {{{ 87 LoadModule ldap_module modules/mod_ldap.so 88 LoadModule authnz_ldap_module modules/mod_authnz_ldap.so 89 }}} 90 91 2. Your httpd.conf also needs to look something like: 92 93 {{{ 94 #!xml 95 <Location /trac/> 96 SetHandler mod_python 97 PythonInterpreter main_interpreter 98 PythonHandler trac.web.modpython_frontend 99 PythonOption TracEnv /home/trac/ 100 PythonOption TracUriRoot /trac/ 101 Order deny,allow 102 Deny from all 103 Allow from 192.168.11.0/24 104 AuthType Basic 105 AuthName "Trac" 106 AuthBasicProvider "ldap" 107 AuthLDAPURL "ldap://127.0.0.1/dc=example,dc=co,dc=ke?uid?sub?(objectClass=inetOrgPerson)" 108 authzldapauthoritative Off 109 require valid-user 110 </Location> 111 }}} 112 113 Or the LDAP interface to a Microsoft Active Directory: 114 115 {{{ 116 #!xml 117 <Location /trac/> 118 SetHandler mod_python 119 PythonInterpreter main_interpreter 120 PythonHandler trac.web.modpython_frontend 121 PythonOption TracEnv /home/trac/ 122 PythonOption TracUriRoot /trac/ 123 Order deny,allow 124 Deny from all 125 Allow from 192.168.11.0/24 126 AuthType Basic 127 AuthName "Trac" 128 AuthBasicProvider "ldap" 129 AuthLDAPURL "ldap://adserver.company.com:3268/DC=company,DC=com?sAMAccountName?sub?(objectClass=user)" 130 AuthLDAPBindDN ldap-auth-user@company.com 131 AuthLDAPBindPassword "the_password" 132 authzldapauthoritative Off 133 # require valid-user 134 require ldap-group CN=Trac Users,CN=Users,DC=company,DC=com 135 </Location> 136 }}} 137 138 Note 1: This is the case where the LDAP search will get around the multiple OUs, conecting to Global Catalog Server portion of AD (Notice the port is 3268, not the normal LDAP 389). The GCS is basically a "flattened" tree which allows searching for a user without knowing to which OU they belong. 139 140 Note 2: Active Directory requires an authenticating user/password to access records (AuthLDAPBindDN and AuthLDAPBindPassword). 141 142 Note 3: The directive "require ldap-group ..." specifies an AD group whose members are allowed access. 143 98 See corresponding section in the [wiki:TracModWSGI#ConfiguringAuthentication] page. 99 100 101 == Advanced Configuration 102 103 === Setting the Python Egg Cache === 104 105 If the Egg Cache isn't writeable by your Web server, you'll either have to change the permissions, or point Python to a location where Apache can write. This can manifest itself as a ''500 internal server error'' and/or a complaint in the syslog. 106 107 {{{ 108 #!xml 109 <Location /projects/myproject> 110 ... 111 PythonOption PYTHON_EGG_CACHE /tmp 112 ... 113 </Location> 114 }}} 144 115 145 116 … … 158 129 Be careful about using the !PythonPath directive, and ''not'' `SetEnv PYTHONPATH`, as the latter won't work. 159 130 160 == Setting up multiple projects==131 === Setting up multiple projects === 161 132 162 133 The Trac mod_python handler supports a configuration option similar to Subversion's `SvnParentPath`, called `TracEnvParentDir`: … … 193 164 }}} 194 165 195 == Virtual Host Configuration==166 === Virtual Host Configuration === 196 167 197 168 Below is the sample configuration required to set up your trac as a virtual server (i.e. when you access it at the URLs like … … 219 190 }}} 220 191 221 if you have issues with login try using `<LocationMatch>` instead of `<Location>` 192 This does not seem to work in all cases. What you can do if it does not: 193 * Try using `<LocationMatch>` instead of `<Location>` 194 * <Location /> may, in your server setup, refer to the complete host instead of simple the root of the server. This means that everything (including the login directory referenced below) will be sent to python and authentication does not work (i.e. you get the infamous Authentication information missing error). If this applies to you, try using a sub-directory for trac instead of the root (i.e. /web/ and /web/login instead of / and /login). 195 * Depending on apache's `NameVirtualHost` configuration, you may need to use `<VirtualHost *:80>` instead of `<VirtualHost *>`. 222 196 223 197 For a virtual host that supports multiple projects replace "`TracEnv`" /var/trac/myproject with "`TracEnvParentDir`" /var/trac/ 224 198 225 Note: !DocumentRoot should not point to your Trac project env. As Asmodai wrote on #trac: "suppose there's a webser er bug that allows disclosure of !DocumentRoot they could then leech the entire Trac environment".199 Note: !DocumentRoot should not point to your Trac project env. As Asmodai wrote on #trac: "suppose there's a webserver bug that allows disclosure of !DocumentRoot they could then leech the entire Trac environment". 226 200 227 201 == Troubleshooting == … … 237 211 238 212 For multiple projects, try restarting the server as well. 213 214 === Login Not Working === 215 If you've used `<Location />` directive, it will override any other directives, as well as `<Location /login>`. 216 The workaround is to use negation expression as follows (for multi project setups): 217 {{{ 218 #!xml 219 #this one for other pages 220 <Location ~ "/*(?!login)"> 221 SetHandler mod_python 222 PythonHandler trac.web.modpython_frontend 223 PythonOption TracEnvParentDir /projects 224 PythonOption TracUriRoot / 225 226 </Location> 227 #this one for login page 228 <Location ~ "/[^/]+/login"> 229 SetHandler mod_python 230 PythonHandler trac.web.modpython_frontend 231 PythonOption TracEnvParentDir /projects 232 PythonOption TracUriRoot / 233 234 #remove these if you don't want to force SSL 235 RewriteEngine On 236 RewriteCond %{HTTPS} off 237 RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} 238 239 AuthType Basic 240 AuthName "Trac" 241 AuthUserFile /projects/.htpasswd 242 Require valid-user 243 </Location> 244 }}} 239 245 240 246 === Expat-related segmentation faults === #expat … … 258 264 Using <Location /> together with `SetHandler` resulted in having everything handled by mod_python, which leads to not being able download any CSS or images/icons. I used <Location /trac> `SetHandler None` </Location> to circumvent the problem, though I do not know if this is the most elegant solution. 259 265 266 === Problem with zipped egg === 267 268 It's possible that your version of mod_python will not import modules from zipped eggs. If you encounter an `ImportError: No module named trac` in your Apache logs but you think everything is where it should be, this might be your problem. Look in your site-packages directory; if the Trac module appears as a ''file'' rather than a ''directory'', then this might be your problem. To rectify, try installing Trac using the `--always-unzip` option, like this: 269 270 {{{ 271 easy_install --always-unzip Trac-0.12b1.zip 272 }}} 273 260 274 === Using .htaccess === 261 275 … … 264 278 It may be possible to work around this with mod_rewrite, but I failed to get this working. In all, it is more hassle than it is worth. Stick to the provided instructions. :) 265 279 266 === Win32 Issues === 280 A success story: For me it worked out-of-box, with following trivial config: 281 {{{#!xml 282 SetHandler mod_python 283 PythonInterpreter main_interpreter 284 PythonHandler trac.web.modpython_frontend 285 PythonOption TracEnv /system/path/to/this/directory 286 PythonOption TracUriRoot /path/on/apache 287 288 AuthType Basic 289 AuthName "ProjectName" 290 AuthUserFile /path/to/.htpasswd 291 Require valid-user 292 }}} 293 294 The `TracUriRoot` is obviously the path you need to enter to the browser to get to the trac (e.g. domain.tld/projects/trac) 295 296 === Additional .htaccess help === 297 298 If you are using the .htaccess method you may have additional problems if your trac directory is inheriting .htaccess directives from another. This may also help to add to your .htaccess file: 299 300 {{{ 301 <IfModule mod_rewrite.c> 302 RewriteEngine Off 303 </IfModule> 304 }}} 305 306 === Platform specific issues 307 ==== Win32 Issues ==== 267 308 If you run trac with mod_python < 3.2 on Windows, uploading attachments will '''not''' work. This problem is resolved in mod_python 3.1.4 or later, so please upgrade mod_python to fix this. 268 309 269 310 270 === OS X issues===311 ==== OS X issues ==== 271 312 272 313 When using mod_python on OS X you will not be able to restart Apache using `apachectl restart`. This is apparently fixed in mod_python 3.2, but there's also a patch available for earlier versions [http://www.dscpl.com.au/projects/vampire/patches.html here]. 273 314 274 === SELinux issues===315 ==== SELinux issues ==== 275 316 276 317 If Trac reports something like: ''Cannot get shared lock on db.lock'' … … 281 322 }}} 282 323 283 See also [ [http://subversion.tigris.org/faq.html#reposperms]]284 285 === FreeBSD issues===324 See also [http://subversion.tigris.org/faq.html#reposperms] 325 326 ==== FreeBSD issues ==== 286 327 Pay attention to the version of the installed mod_python and sqlite packages. Ports have both the new and old ones, but earlier versions of pysqlite and mod_python won't integrate as the former requires threaded support in python, and the latter requires a threadless install. 287 328 288 329 If you compiled and installed apache2, apache wouldn´t support threads (cause it doesn´t work very well on FreeBSD). You could force thread support when running ./configure for apache, using --enable-threads, but this isn´t recommendable. 289 The best option [ [http://modpython.org/pipermail/mod_python/2006-September/021983.html seems to be]] adding to /usr/local/apache2/bin/ennvars the line330 The best option [http://modpython.org/pipermail/mod_python/2006-September/021983.html seems to be] adding to /usr/local/apache2/bin/ennvars the line 290 331 291 332 {{{ … … 293 334 }}} 294 335 336 337 ==== Fedora 7 Issues ==== 338 Make sure you install the 'python-sqlite2' package as it seems to be required for TracModPython but not for tracd 339 340 295 341 === Subversion issues === 296 342 … … 299 345 If this is not the case, it's possible that you're using Subversion libraries that are binary incompatible with the apache ones (an incompatibility of the `apr` libraries is usually the cause). In that case, you also won't be able to use the svn modules for Apache (`mod_dav_svn`). 300 346 301 You also need a recent version of `mod_python` in order to avoid a runtime error ({{{argument number 2: a 'apr_pool_t *' is expected}}}) due to the default usage of multiple sub-interpreters. 3.2.8 ''should'' work, though it's probably better to use the workaround described in #3371, in order to force the use of the main interpreter:347 You also need a recent version of `mod_python` in order to avoid a runtime error ({{{argument number 2: a 'apr_pool_t *' is expected}}}) due to the default usage of multiple sub-interpreters. 3.2.8 ''should'' work, though it's probably better to use the workaround described in [trac:#3371 #3371], in order to force the use of the main interpreter: 302 348 {{{ 303 349 PythonInterpreter main_interpreter 304 350 }}} 305 This is anyway the recommended workaround for other well-known issues seen when using the Python bindings for Subversion within mod_python ( #2611, #3455). See in particular Graham Dumpleton's comment in [comment:ticket:3455:9#3455] explaining the issue.351 This is anyway the recommended workaround for other well-known issues seen when using the Python bindings for Subversion within mod_python ([trac:#2611 #2611], [trac:#3455 #3455]). See in particular Graham Dumpleton's comment in [trac:comment:9:ticket:3455 #3455] explaining the issue. 306 352 307 353 === Page layout issues === … … 317 363 318 364 Note: For the above configuration to have any effect it must be put after the configuration of your project root location, i.e. {{{<Location /myproject />}}}. 365 366 Also, setting `PythonOptimize On` seems to mess up the page headers and footers, in addition to hiding the documentation for macros and plugins (see #Trac8956). Considering how little effect the option has, it is probably a good idea to leave it `Off`. 319 367 320 368 === HTTPS issues === … … 331 379 }}} 332 380 333 === Fedora 7 Issues ===334 Make sure you install the 'python-sqlite2' package as it seems to be required for TracModPython but not for tracd335 336 381 337 382 === Segmentation fault with php5-mhash or other php5 modules === 338 You may encounter segfaults (reported on debian etch) if php5-mhash module is installed. Try to remove it to see if this solves the problem. See debian bug report [ [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=411487]]339 340 Some people also have troubles when using php5 compiled with its own 3rd party libraries instead of system libraries. Check here [ [http://www.djangoproject.com/documentation/modpython/#if-you-get-a-segmentation-fault]]383 You may encounter segfaults (reported on debian etch) if php5-mhash module is installed. Try to remove it to see if this solves the problem. See debian bug report [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=411487] 384 385 Some people also have troubles when using php5 compiled with its own 3rd party libraries instead of system libraries. Check here [http://www.djangoproject.com/documentation/modpython/#if-you-get-a-segmentation-fault] 341 386 342 387 ---- 343 See also TracGuide, TracInstall, TracCgi, TracFastCgi388 See also: TracGuide, TracInstall, [wiki:TracModWSGI ModWSGI], [wiki:TracFastCgi FastCGI], [trac:TracNginxRecipe TracNginxRecipe]
