Changes between Version 6 and Version 7 of TracModWSGI


Ignore:
Timestamp:
03/24/15 23:16:50 (2 years ago)
Author:
trac
Comment:

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  • TracModWSGI

    v6 v7  
    1 = Trac and mod_wsgi =
    2 
    3 
    4 [http://code.google.com/p/modwsgi/ mod_wsgi] is an Apache module for running WSGI-compatible Python applications directly on top of the Apache webserver. The mod_wsgi adapter is written completely in C and provides very good performances.
     1= Trac and mod_wsgi
     2
     3[https://github.com/GrahamDumpleton/mod_wsgi mod_wsgi] is an Apache module for running WSGI-compatible Python applications directly on top of the Apache webserver. The mod_wsgi adapter is written completely in C and provides very good performance.
    54
    65[[PageOutline(2-3,Overview,inline)]]
     
    87== The `trac.wsgi` script
    98
    10 Trac can be run on top of mod_wsgi with the help of the following application script, which is just a Python file, though usually saved with a `.wsgi` extension).
     9Trac can be run on top of mod_wsgi with the help of an application script, which is just a Python file saved with a `.wsgi` extension.
     10
     11A robust and generic version of this file can be created using the `trac-admin <env> deploy <dir>` command which automatically substitutes the required paths, see TracInstall#cgi-bin. The script should be sufficient for most installations and users not wanting more information can proceed to [#Mappingrequeststothescript configuring Apache].
     12
     13If you are using Trac with multiple projects, you can specify their common parent directory using the `TRAC_ENV_PARENT_DIR` in trac.wsgi:
     14{{{#!python
     15def application(environ, start_request):
     16    # Add this to config when you have multiple projects                                             
     17    environ.setdefault('trac.env_parent_dir', '/usr/share/trac/projects') 
     18    ..
     19}}}
    1120
    1221=== A very basic script
     
    2332}}}
    2433
    25 The `TRAC_ENV` variable should naturally be the directory for your Trac environment (if you have several Trac environments in a directory, you can also use `TRAC_ENV_PARENT_DIR` instead), while the `PYTHON_EGG_CACHE` should be a directory where Python can temporarily extract Python eggs.
     34The `TRAC_ENV` variable should naturally be the directory for your Trac environment, and the `PYTHON_EGG_CACHE` should be a directory where Python can temporarily extract Python eggs. If you have several Trac environments in a directory, you can also use `TRAC_ENV_PARENT_DIR` instead of `TRAC_ENV`.
     35
     36On Windows:
     37 - If run under the user's session, the Python Egg cache can be found in `%AppData%\Roaming`, for example:
     38{{{#!python
     39os.environ['PYTHON_EGG_CACHE'] = r'C:\Users\Administrator\AppData\Roaming\Python-Eggs'
     40}}}
     41 - If run under a Window service, you should create a directory for Python Egg cache:
     42{{{#!python
     43os.environ['PYTHON_EGG_CACHE'] = r'C:\Trac-Python-Eggs'
     44}}}
    2645
    2746=== A more elaborate script
    2847
    29 If you're using multiple `.wsgi` files (for example one per Trac environment) you must ''not'' use `os.environ['TRAC_ENV']` to set the path to the Trac environment. Using this method may lead to Trac delivering the content of another Trac environment, as the variable may be filled with the path of a previously viewed Trac environment.
     48If you are using multiple `.wsgi` files (for example one per Trac environment) you must ''not'' use `os.environ['TRAC_ENV']` to set the path to the Trac environment. Using this method may lead to Trac delivering the content of another Trac environment, as the variable may be filled with the path of a previously viewed Trac environment.
    3049
    3150To solve this problem, use the following `.wsgi` file instead:
     
    4362For clarity, you should give this file a `.wsgi` extension. You should probably put the file in its own directory, since you will expose it to Apache.
    4463
    45 If you have installed Trac and eggs in a path different from the standard one you should add that path by adding the following code at the top of the wsgi script:
     64If you have installed Trac and Python eggs in a path different from the standard one, you should add that path by adding the following code at the top of the wsgi script:
    4665
    4766{{{#!python
     
    5271Change it according to the path you installed the Trac libs at.
    5372
    54 === Recommended `trac.wsgi` script
    55 
    56 A somewhat robust and generic version of this file can be created using the `trac-admin <env> deploy <dir>` command which automatically substitutes the required paths (see TracInstall#cgi-bin).
    57 
    58 
    5973== Mapping requests to the script
    6074
    61 After you've done preparing your .wsgi script, add the following to your Apache configuration file (`httpd.conf` for example).
    62 
    63 {{{
     75After preparing your .wsgi script, add the following to your Apache configuration file, typically `httpd.conf`:
     76
     77{{{#!apache
    6478WSGIScriptAlias /trac /usr/local/trac/mysite/apache/mysite.wsgi
    6579
     
    7387Here, the script is in a subdirectory of the Trac environment.
    7488
    75 If you followed the directions [http://trac.edgewall.org/wiki/TracInstall#cgi-bin Generating the Trac cgi-bin directory], your Apache configuration file should look like following:
    76 
    77 {{{
     89If you followed the directions [TracInstall#cgi-bin Generating the Trac cgi-bin directory], your Apache configuration file should look like following:
     90
     91{{{#!apache
    7892WSGIScriptAlias /trac /usr/share/trac/cgi-bin/trac.wsgi
    7993
     
    8599}}}
    86100
    87 In order to let Apache run the script, access to the directory in which the script resides is opened up to all of Apache. Additionally, the `WSGIApplicationGroup` directive ensures that Trac is always run in the first Python interpreter created by mod_wsgi; this is necessary because the Subversion Python bindings, which are used by Trac, don't always work in other sub-interpreters and may cause requests to hang or cause Apache to crash as a result. After adding this configuration, restart Apache, and then it should work.
     101In order to let Apache run the script, access to the directory in which the script resides is opened up to all of Apache. Additionally, the `WSGIApplicationGroup` directive ensures that Trac is always run in the first Python interpreter created by mod_wsgi. This is necessary because the Subversion Python bindings, which are used by Trac, don't always work in other sub-interpreters and may cause requests to hang or cause Apache to crash. After adding this configuration, restart Apache, and then it should work.
    88102
    89103To test the setup of Apache, mod_wsgi and Python itself (ie. without involving Trac and dependencies), this simple wsgi application can be used to make sure that requests gets served (use as only content in your `.wsgi` script):
     
    97111For more information about using the mod_wsgi specific directives, see the [http://code.google.com/p/modwsgi/wiki/ mod_wsgi's wiki] and more specifically the [http://code.google.com/p/modwsgi/wiki/IntegrationWithTrac IntegrationWithTrac] page.
    98112
    99 
    100113== Configuring Authentication
    101114
    102 We describe in the the following sections different methods for setting up authentication.
    103 
    104 See also [http://httpd.apache.org/docs/2.2/howto/auth.html Authentication, Authorization and Access Control] in the Apache guide.
    105 
    106 === Using Basic Authentication ===
    107 
    108 The simplest way to enable authentication with Apache is to create a password file. Use the `htpasswd` program to create the password file:
    109 {{{
     115The following sections describe different methods for setting up authentication. See also [http://httpd.apache.org/docs/2.2/howto/auth.html Authentication, Authorization and Access Control] in the Apache guide.
     116
     117=== Using Basic Authentication
     118
     119The simplest way to enable authentication with Apache is to create a password file. Use the `htpasswd` program as follows:
     120{{{#!sh
    110121$ htpasswd -c /somewhere/trac.htpasswd admin
    111122New password: <type password>
     
    114125}}}
    115126
    116 After the first user, you dont need the "-c" option anymore:
    117 {{{
     127After the first user, you don't need the "-c" option anymore:
     128{{{#!sh
    118129$ htpasswd /somewhere/trac.htpasswd john
    119130New password: <type password>
     
    126137After you've created the users, you can set their permissions using TracPermissions.
    127138
    128 Now, you'll need to enable authentication against the password file in the Apache configuration:
    129 {{{
     139Now, you need to enable authentication against the password file in the Apache configuration:
     140{{{#!apache
    130141<Location "/trac/login">
    131142  AuthType Basic
     
    136147}}}
    137148
    138 If you're hosting multiple projects you can use the same password file for all of them:
    139 {{{
     149If you are hosting multiple projects, you can use the same password file for all of them:
     150{{{#!apache
    140151<LocationMatch "/trac/[^/]+/login">
    141152  AuthType Basic
     
    148159See also the [http://httpd.apache.org/docs/2.2/mod/mod_auth_basic.html mod_auth_basic] documentation.
    149160
    150 === Using Digest Authentication ===
     161=== Using Digest Authentication
    151162
    152163For better security, it is recommended that you either enable SSL or at least use the “digest” authentication scheme instead of “Basic”.
    153164
    154 You'll have to create your `.htpasswd` file with the `htdigest` command instead of `htpasswd`, as follows:
    155 {{{
    156 # htdigest -c /somewhere/trac.htpasswd trac admin
     165You have to create your `.htpasswd` file with the `htdigest` command instead of `htpasswd`, as follows:
     166{{{#!sh
     167$ htdigest -c /somewhere/trac.htpasswd trac admin
    157168}}}
    158169
    159170The "trac" parameter above is the "realm", and will have to be reused in the Apache configuration in the !AuthName directive:
    160171
    161 {{{
     172{{{#!apache
    162173<Location "/trac/login">
    163 
    164     AuthType Digest
    165     AuthName "trac"
    166     AuthDigestDomain /trac
    167     AuthUserFile /somewhere/trac.htpasswd
    168     Require valid-user
     174  AuthType Digest
     175  AuthName "trac"
     176  AuthDigestDomain /trac
     177  AuthUserFile /somewhere/trac.htpasswd
     178  Require valid-user
    169179</Location>
    170180}}}
     
    172182For multiple environments, you can use the same `LocationMatch` as described with the previous method.
    173183
     184'''Note: `Location` cannot be used inside .htaccess files, but must instead live within the main httpd.conf file. If you are on a shared server, you therefore will not be able to provide this level of granularity. '''
     185
    174186Don't forget to activate the mod_auth_digest. For example, on a Debian 4.0r1 (etch) system:
    175 {{{
    176     LoadModule auth_digest_module /usr/lib/apache2/modules/mod_auth_digest.so
    177 }}}
    178 
     187{{{#!apache
     188  LoadModule auth_digest_module /usr/lib/apache2/modules/mod_auth_digest.so
     189}}}
    179190
    180191See also the [http://httpd.apache.org/docs/2.2/mod/mod_auth_digest.html mod_auth_digest] documentation.
     
    182193=== Using LDAP Authentication
    183194
    184 Configuration for [http://httpd.apache.org/docs/2.2/mod/mod_ldap.html mod_ldap] authentication in Apache is a bit tricky (httpd 2.2.x and OpenLDAP: slapd 2.3.19)
    185 
    186 1. You need to load the following modules in Apache httpd.conf
    187 {{{
    188 LoadModule ldap_module modules/mod_ldap.so
    189 LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
    190 }}}
    191 
    192 2. Your httpd.conf also needs to look something like:
    193 
    194 {{{
     195Configuration for [http://httpd.apache.org/docs/2.2/mod/mod_ldap.html mod_ldap] authentication in Apache is more involved (httpd 2.2.x and OpenLDAP: slapd 2.3.19).
     196
     1971. You need to load the following modules in Apache httpd.conf:
     198{{{#!apache
     199  LoadModule ldap_module modules/mod_ldap.so
     200  LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
     201}}}
     2021. Your httpd.conf also needs to look something like:
     203{{{#!apache
    195204<Location /trac/>
    196205  # (if you're using it, mod_python specific settings go here)
     
    206215</Location>
    207216}}}
    208 
    209 
    210 3. You can use the LDAP interface as a way to authenticate to a Microsoft Active Directory:
    211 
    212 
    213 Use the following as your LDAP URL:
    214 {{{
    215     AuthLDAPURL "ldap://directory.example.com:3268/DC=example,DC=com?sAMAccountName?sub?(objectClass=user)"
    216 }}}
    217 
    218 You will also need to provide an account for Apache to use when checking
    219 credentials. As this password will be listed in plaintext in the
    220 config, you should be sure to use an account specifically for this task:
    221 {{{
    222     AuthLDAPBindDN ldap-auth-user@example.com
    223     AuthLDAPBindPassword "password"
    224 }}}
    225 
    226 The whole section looks like:
    227 {{{
     2171. You can use the LDAP interface as a way to authenticate to a Microsoft Active Directory. Use the following as your LDAP URL:
     218{{{#!apache
     219  AuthLDAPURL "ldap://directory.example.com:3268/DC=example,DC=com?sAMAccountName?sub?(objectClass=user)"
     220}}}
     221 You will also need to provide an account for Apache to use when checking credentials. As this password will be listed in plaintext in the config, you need to use an account specifically for this task:
     222{{{#!apache
     223  AuthLDAPBindDN ldap-auth-user@example.com
     224  AuthLDAPBindPassword "password"
     225}}}
     226 The whole section looks like:
     227{{{#!apache
    228228<Location /trac/>
    229229  # (if you're using it, mod_python specific settings go here)
     
    239239  authzldapauthoritative Off
    240240  # require valid-user
    241   require ldap-group CN=Trac Users,CN=Users,DC=company,DC=com
    242 </Location>
    243 }}}
    244 
    245 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.
    246 
    247 Note 2: You can also require the user be a member of a certain LDAP group, instead of
    248 just having a valid login:
    249 {{{
    250     Require ldap-group CN=Trac Users,CN=Users,DC=example,DC=com
     241  Require ldap-group CN=Trac Users,CN=Users,DC=company,DC=com
     242</Location>
     243}}}
     244
     245Note 1: This is the case where the LDAP search will get around the multiple OUs, conecting to the Global Catalog Server portion of AD. Note 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.
     246
     247Note 2: You can also require the user be a member of a certain LDAP group, instead of just having a valid login:
     248{{{#!apache
     249  Require ldap-group CN=Trac Users,CN=Users,DC=example,DC=com
    251250}}}
    252251
    253252See also:
    254   - [http://httpd.apache.org/docs/2.2/mod/mod_authnz_ldap.html mod_authnz_ldap], documentation for mod_authnz_ldap
    255    
     253 - [http://httpd.apache.org/docs/2.2/mod/mod_authnz_ldap.html mod_authnz_ldap], documentation for mod_authnz_ldap.   
    256254 - [http://httpd.apache.org/docs/2.2/mod/mod_ldap.html mod_ldap], documentation for mod_ldap, which provides connection pooling and a shared cache.
    257255 - [http://trac-hacks.org/wiki/LdapPlugin TracHacks:LdapPlugin] for storing TracPermissions in LDAP.
     
    259257=== Using SSPI Authentication
    260258
    261 If you are using Apache on Windows, you can use mod_auth_sspi to provide
    262 single-sign-on. Download the module from the !SourceForge [http://sourceforge.net/projects/mod-auth-sspi/ mod-auth-sspi project] and then add the
    263 following to your !VirtualHost:
    264 {{{
    265     <Location /trac/login>
    266         AuthType SSPI
    267         AuthName "Trac Login"
    268         SSPIAuth On
    269         SSPIAuthoritative On
    270         SSPIDomain MyLocalDomain
    271         SSPIOfferBasic On
    272         SSPIOmitDomain Off
    273         SSPIBasicPreferred On
    274         Require valid-user
    275     </Location>
    276 }}}
    277 
    278 Using the above, usernames in Trac will be of the form `DOMAIN\username`, so
    279 you may have to re-add permissions and such. If you do not want the domain to
    280 be part of the username, set `SSPIOmitDomain On` instead.
     259If you are using Apache on Windows, you can use mod_auth_sspi to provide single-sign-on. Download the module from the !SourceForge [http://sourceforge.net/projects/mod-auth-sspi/ mod-auth-sspi project] and then add the following to your !VirtualHost:
     260{{{#!apache
     261<Location /trac/login>
     262  AuthType SSPI
     263  AuthName "Trac Login"
     264  SSPIAuth On
     265  SSPIAuthoritative On
     266  SSPIDomain MyLocalDomain
     267  SSPIOfferBasic On
     268  SSPIOmitDomain Off
     269  SSPIBasicPreferred On
     270  Require valid-user
     271</Location>
     272}}}
     273
     274Using the above, usernames in Trac will be of the form `DOMAIN\username`, so you may have to re-add permissions and such. If you do not want the domain to be part of the username, set `SSPIOmitDomain On` instead.
    281275
    282276Some common problems with SSPI authentication: [trac:#1055], [trac:#1168] and [trac:#3338].
     
    291285
    292286Here is an example (from the !HttpAuthStore link) using acct_mgr-0.4 for hosting a single project:
    293 {{{
     287{{{#!ini
    294288[components]
    295289; be sure to enable the component
     
    302296}}}
    303297This will generally be matched with an Apache config like:
    304 {{{
     298{{{#!apache
    305299<Location /authFile>
    306300   …HTTP authentication configuration…
     
    308302</Location>
    309303}}}
    310 Note that '''authFile''' need not exist. See the !HttpAuthStore link above for examples where multiple Trac projects are hosted on a server.
     304Note that '''authFile''' need not exist (unless you are using Account Manager older than 0.4). See the !HttpAuthStore link above for examples where multiple Trac projects are hosted on a server.
    311305
    312306=== Example: Apache/mod_wsgi with Basic Authentication, Trac being at the root of a virtual host
    313307
    314 Per the mod_wsgi documentation linked to above, here is an example Apache configuration that a) serves the Trac instance from a virtualhost subdomain and b) uses Apache basic authentication for Trac authentication.
    315 
     308Per the mod_wsgi documentation linked to above, here is an example Apache configuration that:
     309 - serves the Trac instance from a virtualhost subdomain
     310 - uses Apache basic authentication for Trac authentication.
    316311
    317312If you want your Trac to be served from e.g. !http://trac.my-proj.my-site.org, then from the folder e.g. `/home/trac-for-my-proj`, if you used the command `trac-admin the-env initenv` to create a folder `the-env`, and you used `trac-admin the-env deploy the-deploy` to create a folder `the-deploy`, then first:
    318313
    319314Create the htpasswd file:
    320 {{{
     315{{{#!sh
    321316cd /home/trac-for-my-proj/the-env
    322317htpasswd -c htpasswd firstuser
     
    324319htpasswd htpasswd seconduser
    325320}}}
    326 (keep the file above your document root for security reasons)
    327 
    328 Create this file e.g. (ubuntu) `/etc/apache2/sites-enabled/trac.my-proj.my-site.org.conf` with the following contents:
    329 
    330 {{{
     321Keep the file above your document root for security reasons.
     322
     323Create this file e.g. (ubuntu) `/etc/apache2/sites-enabled/trac.my-proj.my-site.org.conf` with the following content:
     324
     325{{{#!apache
    331326<Directory /home/trac-for-my-proj/the-deploy/cgi-bin/trac.wsgi>
    332327  WSGIApplicationGroup %{GLOBAL}
     
    351346Note: for subdomains to work you would probably also need to alter `/etc/hosts` and add A-Records to your host's DNS.
    352347
    353 
    354348== Troubleshooting
    355349
    356350=== Use a recent version
    357351
    358 Please use either version 1.6, 2.4 or later of `mod_wsgi`. Versions prior to 2.4 in the 2.X branch have problems with some Apache configurations that use WSGI file wrapper extension. This extension is used in Trac to serve up attachments and static media files such as style sheets. If you are affected by this problem attachments will appear to be empty and formatting of HTML pages will appear not to work due to style sheet files not loading properly. Another frequent symptom is that binary attachment downloads are truncated. See mod_wsgi tickets [http://code.google.com/p/modwsgi/issues/detail?id=100 #100] and [http://code.google.com/p/modwsgi/issues/detail?id=132 #132].
     352Please use either version 1.6, 2.4 or later of `mod_wsgi`. Versions prior to 2.4 in the 2.X branch have problems with some Apache configurations that use WSGI file wrapper extension. This extension is used in Trac to serve up attachments and static media files such as style sheets. If you are affected by this problem, attachments will appear to be empty and formatting of HTML pages will appear not to work due to style sheet files not loading properly. Another frequent symptom is that binary attachment downloads are truncated. See mod_wsgi tickets [http://code.google.com/p/modwsgi/issues/detail?id=100 #100] and [http://code.google.com/p/modwsgi/issues/detail?id=132 #132].
    359353
    360354''Note: using mod_wsgi 2.5 and Python 2.6.1 gave an Internal Server Error on my system (Apache 2.2.11 and Trac 0.11.2.1). Upgrading to Python 2.6.2 (as suggested [http://www.mail-archive.com/modwsgi@googlegroups.com/msg01917.html here]) solved this for me[[BR]]-- Graham Shanks''
    361355
    362 If you plan to use `mod_wsgi` in embedded mode on Windows or with the MPM worker on Linux, then you'll even need version 0.3.4 or greater (see [trac:#10675] for details).
    363 
    364 === Getting Trac to work nicely with SSPI and 'Require Group' ===
    365 If like me you've set Trac up on Apache, Win32 and configured SSPI, but added a 'Require group' option to your apache configuration, then the SSPIOmitDomain option is probably not working.  If its not working your usernames in trac are probably looking like 'DOMAIN\user' rather than 'user'.
    366 
    367 This WSGI script 'fixes' things, hope it helps:
     356If you plan to use `mod_wsgi` in embedded mode on Windows or with the MPM worker on Linux, then you will need version 0.3.4 or greater. See [trac:#10675] for details.
     357
     358=== Getting Trac to work nicely with SSPI and 'Require Group'
     359
     360If you have set Trac up on Apache, Win32 and configured SSPI, but added a 'Require group' option to your apache configuration, then the SSPIOmitDomain option is probably not working. If it is not working, your usernames in Trac probably look like 'DOMAIN\user' rather than 'user'.
     361
     362This WSGI script 'fixes' that:
    368363{{{#!python
    369364import os
     
    379374}}}
    380375
    381 
    382 === Trac with PostgreSQL ===
    383 
    384 When using the mod_wsgi adapter with multiple Trac instances and PostgreSQL (or MySQL?) as a database back-end, the server ''may'' create a lot of open database connections and thus PostgreSQL processes.
    385 
    386 A somewhat brutal workaround is to disabled connection pooling in Trac. This is done by setting `poolable = False` in `trac.db.postgres_backend` on the `PostgreSQLConnection` class.
    387 
    388 But it's not necessary to edit the source of Trac, the following lines in `trac.wsgi` will also work:
    389 
    390 {{{
     376=== Trac with PostgreSQL
     377
     378When using the mod_wsgi adapter with multiple Trac instances and PostgreSQL (or MySQL?) as the database, the server ''may'' create a lot of open database connections and thus PostgreSQL processes.
     379
     380A somewhat brutal workaround is to disable connection pooling in Trac. This is done by setting `poolable = False` in `trac.db.postgres_backend` on the `PostgreSQLConnection` class.
     381
     382But it is not necessary to edit the source of Trac. The following lines in `trac.wsgi` will also work:
     383
     384{{{#!python
    391385import trac.db.postgres_backend
    392386trac.db.postgres_backend.PostgreSQLConnection.poolable = False
     
    395389or
    396390
    397 {{{
     391{{{#!python
    398392import trac.db.mysql_backend
    399393trac.db.mysql_backend.MySQLConnection.poolable = False
    400394}}}
    401395
    402 Now Trac drops the connection after serving a page and the connection count on the database will be kept minimal.
     396Now Trac drops the connection after serving a page and the connection count on the database will be kept low.
    403397
    404398//This is not a recommended approach though. See also the notes at the bottom of the [http://code.google.com/p/modwsgi/wiki/IntegrationWithTrac mod_wsgi's IntegrationWithTrac] wiki page.//
     
    408402For more troubleshooting tips, see also the [TracModPython#Troubleshooting mod_python troubleshooting] section, as most Apache-related issues are quite similar, plus discussion of potential [http://code.google.com/p/modwsgi/wiki/ApplicationIssues application issues] when using mod_wsgi. The wsgi page also has a [http://code.google.com/p/modwsgi/wiki/IntegrationWithTrac Integration With Trac] document.
    409403
    410 
    411404----
    412 See also:  TracGuide, TracInstall, [wiki:TracFastCgi FastCGI], [wiki:TracModPython ModPython], [trac:TracNginxRecipe TracNginxRecipe]
     405See also: TracGuide, TracInstall, [wiki:TracFastCgi FastCGI], [wiki:TracModPython ModPython], [trac:TracNginxRecipe TracNginxRecipe]