Changes between Version 4 and Version 5 of Trac Fast Cgi


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Timestamp:
Aug 19, 2021, 11:03:25 PM (3 years ago)
Author:
trac
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  • Trac Fast Cgi

    v4 v5  
    44[[PageOutline(2-5, Contents, floated)]]
    55
    6 [http://www.fastcgi.com/ FastCGI] interface allows Trac to remain resident much like with [wiki:TracModPython mod_python] or [wiki:TracModWSGI mod_wsgi]. It is faster than external CGI interfaces which must start a new process for each request. Additionally, it is supported by a much wider variety of web servers.
    7 
    8 Note that unlike mod_python, FastCGI supports [http://httpd.apache.org/docs/suexec.html Apache SuEXEC], ie run with different permissions than the web server runs with. `mod_wsgi` supports the `WSGIDaemonProcess` with user / group parameters to achieve the same effect.
     6[https://fastcgi-archives.github.io FastCGI] interface allows Trac to remain resident much like with [wiki:TracModPython mod_python] or [wiki:TracModWSGI mod_wsgi]. It is faster than external CGI interfaces which must start a new process for each request. Additionally, it is supported by a much wider variety of web servers.
     7
     8Note that unlike mod_python, FastCGI supports [https://httpd.apache.org/docs/suexec.html Apache SuEXEC], ie run with different permissions than the web server runs with. `mod_wsgi` supports the `WSGIDaemonProcess` with user / group parameters to achieve the same effect.
    99
    1010'''Note for Windows:''' Trac's FastCGI does not run under Windows, as Windows does not implement `Socket.fromfd`, which is used by `_fcgi.py`. If you want to connect to IIS, you may want to try [trac:TracOnWindowsIisAjp AJP]/[trac:TracOnWindowsIisAjp ISAPI].
    … …  
    2727<IfModule mod_fastcgi.c>
    2828   AddHandler fastcgi-script .fcgi
    29    FastCgiIpcDir /var/lib/apache2/fastcgi 
     29   FastCgiIpcDir /var/lib/apache2/fastcgi
    3030</IfModule>
    3131LoadModule fastcgi_module /usr/lib/apache2/modules/mod_fastcgi.so
    … …  
    4646}}}
    4747
     48You can also specify the `PYTHON_EGG_CACHE` environment variable using a second `-initial-env` directive:
     49{{{#!apache
     50FastCgiConfig -initial-env TRAC_ENV=/var/lib/trac \
     51    -initial-env PYTHON_EGG_CACHE=/var/lib/trac/plugin-cache
     52}}}
     53
    4854=== Set up with `mod_fcgid`
    4955
    … …  
    6268=== Alternative environment setup
    6369
    64 A better method to specify the path to the Trac environment is to embed the path into `trac.fcgi` script itself. That doesn't require configuration of the server environment variables, works for both [trac:FastCgi] modules as well as for [http://www.lighttpd.net/ lighttpd] and CGI:
     70A better method to specify the path to the Trac environment is to embed the path into `trac.fcgi` script itself. That doesn't require configuration of the server environment variables, works for both [trac:FastCgi] modules as well as for [https://www.lighttpd.net/ lighttpd] and CGI:
    6571{{{#!python
    6672import os
    … …  
    100106The second rule will be there to serve the few static files needed to correctly display the Trac interface. Create it as ''Directory rule'' for ''/common'' and just set it to the ''Static files'' handler and with a ''Document root'' that points to the appropriate files: ''$TRAC_LOCAL/htdocs/'' (where $TRAC_LOCAL is a directory defined by the user or the system administrator to place local Trac resources).
    101107
    102 '''Note:''' If the tracd process fails to start up, and Cherokee displays a 503 error page, you might be missing the [http://trac.saddi.com/flup python-flup] package ([trac:#9903]). Python-flup is a dependency which provides Trac with SCGI capability. You can install it on Debian based systems with:
     108'''Note:''' If the tracd process fails to start up, and Cherokee displays a 503 error page, you might be missing the [https://www.saddi.com/software/flup/ python-flup] package ([trac:#9903]). Python-flup is a dependency which provides Trac with SCGI capability. You can install it on Debian based systems with:
    103109{{{#!sh
    104110sudo apt-get install python-flup
    … …  
    107113== Lighttpd Configuration
    108114
    109 The FastCGI front-end was developed primarily for use with alternative webservers, such as [http://www.lighttpd.net/ Lighttpd].
     115The FastCGI front-end was developed primarily for use with alternative webservers, such as [https://www.lighttpd.net/ Lighttpd].
    110116
    111117Lighttpd is a secure, fast, compliant and very flexible web-server that has been optimized for high-performance environments. It has a very low memory footprint compared to other web servers and takes care of CPU load.
    … …  
    116122var.fcgi_binary="/path/to/cgi-bin/trac.fcgi" # 0.10 name of prior fcgi executable
    117123fastcgi.server = ("/trac" =>
    118    
     124
    119125                   ("trac" =>
    120126                     ("socket" => "/tmp/trac-fastcgi.sock",
    … …  
    174180# Separated password files for each project
    175181# See "Conditional Configuration" in
    176 # http://trac.lighttpd.net/trac/file/branches/lighttpd-merge-1.4.x/doc/configuration.txt
     182# https://redmine.lighttpd.net/projects/lighttpd/repository/entry/doc/configuration.txt?rev=lighttpd-1.4.28
    177183
    178184$HTTP["url"] =~ "^/first/" {
    … …  
    184190
    185191# Enable auth on trac URLs, see
    186 # http://trac.lighttpd.net/trac/file/branches/lighttpd-merge-1.4.x/doc/authentication.txt
     192# https://redmine.lighttpd.net/projects/lighttpd/repository/entry/doc/authentication.txt?rev=lighttpd-1.4.28
    187193
    188194auth.require = ("/first/login" =>
    … …  
    286292== !LiteSpeed Configuration
    287293
    288 The FastCGI front-end was developed primarily for use with alternative webservers, such as [http://www.litespeedtech.com/ LiteSpeed].
     294The FastCGI front-end was developed primarily for use with alternative webservers, such as [https://www.litespeedtech.com/ LiteSpeed].
    289295
    290296!LiteSpeed web server is an event-driven asynchronous Apache replacement designed from the ground-up to be secure, scalable, and operate with minimal resources. !LiteSpeed can operate directly from an Apache config file and is targeted for business-critical environments.
    … …  
    335341== Nginx Configuration
    336342
    337 [http://nginx.org/en/ Nginx] is able to communicate with FastCGI processes, but can not spawn them. So you need to start FastCGI server for Trac separately.
     343[https://nginx.org/en/ Nginx] is able to communicate with FastCGI processes, but can not spawn them. So you need to start FastCGI server for Trac separately.
    338344
    339345 1. Nginx configuration with basic authentication handled by Nginx - confirmed to work on 0.6.32
    … …  
    411417     import trac.web._fcgi
    412418
    413      fcgiserv = trac.web._fcgi.WSGIServer(dispatch_request, 
     419     fcgiserv = trac.web._fcgi.WSGIServer(dispatch_request,
    414420          bindAddress = sockaddr, umask = 7)
    415421     fcgiserv.run()
    … …  
    432438
    433439}}}
    434  1. Reload nginx and launch trac.fcgi: 
     440 1. Reload nginx and launch trac.fcgi:
    435441 {{{#!sh
    436 trac@trac.example ~ $ ./trac-standalone-fcgi.py 
     442trac@trac.example ~ $ ./trac-standalone-fcgi.py
    437443}}}
    438444
    … …  
    445451  * and patch from [trac:#7239] is applied, or you'll have to fix the socket file permissions every time
    446452
    447 Unfortunately Nginx does not support variable expansion in fastcgi_pass directive. 
    448 Thus it is not possible to serve multiple Trac instances from one server block. 
    449 
    450 If you worry enough about security, run Trac instances under separate users. 
     453Unfortunately Nginx does not support variable expansion in fastcgi_pass directive.
     454Thus it is not possible to serve multiple Trac instances from one server block.
     455
     456If you worry enough about security, run Trac instances under separate users.
    451457
    452458Another way to run Trac as a FCGI external application is offered in [trac:#6224].