Changes between Version 2 and Version 3 of TracFastCgi


Ignore:
Timestamp:
03/14/14 17:52:04 (3 years ago)
Author:
trac
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  • TracFastCgi

    v2 v3  
    11= Trac with FastCGI = 
    22 
    3 Since version 0.9, Trac supports being run through the [http://www.fastcgi.com/ FastCGI] interface. Like [wiki:TracModPython mod_python], this allows Trac to remain resident, and is faster than external CGI interfaces which must start a new process for each request. However, unlike mod_python, it is able to support [http://httpd.apache.org/docs/suexec.html SuEXEC]. Additionally, it is supported by much wider variety of web servers. 
    4  
    5 '''Note for Windows:''' Trac's FCGI 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, your choice may be [trac:TracOnWindowsIisAjp AJP]. 
     3[http://www.fastcgi.com/ FastCGI] interface allows Trac to remain resident much like with [wiki:TracModPython mod_python]. It is faster than external CGI interfaces which must start a new process for each request. However, unlike mod_python, FastCGI supports [http://httpd.apache.org/docs/suexec.html Apache SuEXEC], i.e. run with different permissions than web server. Additionally, it is supported by much wider variety of web servers. 
     4 
     5'''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]. 
    66 
    77== Simple Apache configuration == 
    88 
    99There are two FastCGI modules commonly available for Apache: `mod_fastcgi` and 
    10 `mod_fcgid`.  The `FastCgiIpcDir` and `FastCgiConfig` directives discussed 
    11 below are `mod_fastcgi` directives; the `DefaultInitEnv` is a `mod_fcgid` 
    12 directive. 
    13  
    14 For `mod_fastcgi`, add the following to an appropriate Apache configuration 
    15 file: 
     10`mod_fcgid` (preferred). The latter is more up-to-date. 
     11 
     12==== setup with `mod_fastcgi` ==== 
     13`mod_fastcgi` uses `FastCgiIpcDir` and `FastCgiConfig` directives that should be added to an appropriate Apache configuration file: 
    1614{{{ 
    1715# Enable fastcgi for .fcgi files 
     
    3937}}} 
    4038 
    41 But neither of these will work for `mod_fcgid`.  A similar but partial 
    42 solution for `mod_fcgid` is: 
     39==== setup with `mod_fcgid` ==== 
     40Configure `ScriptAlias` (see TracCgi for details), but call `trac.fcgi` 
     41instead of `trac.cgi`. Note that slash at the end - it is important. 
     42{{{ 
     43ScriptAlias /trac /path/to/www/trac/cgi-bin/trac.fcgi/ 
     44}}} 
     45 
     46To setup Trac environment for `mod_fcgid` it is necessary to use 
     47`DefaultInitEnv` directive. It cannot be used in `Directory` or 
     48`Location` context, so if you need to support multiple projects, try 
     49alternative environment setup below. 
     50 
    4351{{{ 
    4452DefaultInitEnv TRAC_ENV /path/to/env/trac/ 
    4553}}} 
    46 But this cannot be used in `Directory` or `Location` context, which makes it 
    47 difficult to support multiple projects. 
    48  
    49 A better method which works for both of these modules (and for  [http://www.lighttpd.net/ lighttpd] and CGI as well), because it involves 
    50 no server configuration settings for environment variables, is to set one 
    51 of the variables in `trac.fcgi`, e.g.: 
     54 
     55==== alternative environment setup ==== 
     56A better method to specify path to Trac environment it to embed the path 
     57into `trac.fcgi` script itself. That doesn't require configuration of server 
     58environment variables, works for both FastCgi modules 
     59(and for [http://www.lighttpd.net/ lighttpd] and CGI as well): 
    5260{{{ 
    5361import os 
     
    6068}}} 
    6169 
    62 Using this method, different projects can be supported by using different 
    63 `.fcgi` scripts with different `ScriptAliases`, copying and appropriately 
    64 renaming `trac.fcgi` and adding the above code to create each such script. 
     70With this method different projects can be supported by using different 
     71`.fcgi` scripts with different `ScriptAliases`. 
    6572 
    6673See [https://coderanger.net/~coderanger/httpd/fcgi_example.conf this fcgid example config] which uses a !ScriptAlias directive with trac.fcgi with a trailing / like this: 
     
    8895The second rule will be there to serve the few static files needed to correctly display the Trac interface. Create it as ''Directory rule'' for ''/chrome/common'' and just set it to the ''Static files'' handler and with a ''Document root'' that points to the appropriate files: ''/usr/share/trac/htdocs/'' 
    8996 
     97Note:\\ 
     98If 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.\\ 
     99Python-flup is a dependency which provides trac with SCGI capability. You can install it on debian based systems with: 
     100{{{ 
     101sudo apt-get install python-flup 
     102}}} 
     103 
    90104== Simple Lighttpd Configuration == 
    91105 
     
    97111For using `trac.fcgi`(prior to 0.11) / fcgi_frontend.py (0.11) with lighttpd add the following to your lighttpd.conf: 
    98112{{{ 
    99 #var.fcgi_binary="/path/to/fcgi_frontend.py" # 0.11 if installed with easy_setup, it is inside the egg directory 
     113#var.fcgi_binary="/usr/bin/python /path/to/fcgi_frontend.py" # 0.11 if installed with easy_setup, it is inside the egg directory 
    100114var.fcgi_binary="/path/to/cgi-bin/trac.fcgi" # 0.10 name of prior fcgi executable 
    101115fastcgi.server = ("/trac" => 
     
    115129and you may set one of the two in `trac.fcgi` instead of in `lighttpd.conf` 
    116130using `bin-environment` (as in the section above on Apache configuration). 
     131 
     132Note that lighttpd has a bug related to 'SCRIPT_NAME' and 'PATH_INFO' when the uri of fastcgi.server is '/' instead of '/trac' in this example, see #Trac2418. This should be fixed since lighttpd 1.4.23, and you may need to add `"fix-root-scriptname" => "enable"` as parameter of fastcgi.server. 
    117133 
    118134For using two projects with lighttpd add the following to your `lighttpd.conf`: 
     
    268284Note about running lighttpd with reduced permissions: 
    269285 
    270   If nothing else helps and trac.fcgi doesn't start with lighttpd settings __server.username = "www-data"__, __server.groupname = "www-data"__, then in the `bin-environment` section set `PYTHON_EGG_CACHE` to the home directory of `www-data` or some other directory accessible to this account for writing. 
     286  If nothing else helps and trac.fcgi doesn't start with lighttpd settings `server.username = "www-data"`, `server.groupname = "www-data"`, then in the `bin-environment` section set `PYTHON_EGG_CACHE` to the home directory of `www-data` or some other directory accessible to this account for writing. 
    271287 
    272288 
     
    277293!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. 
    278294 
    279 Setup 
    280  
    281 1) Please make sure you have first have a working install of a Trac project. Test install with “tracd” first. 
    282  
    283 2) Create a Virtual Host for this setup. From now on we will refer to this vhost as TracVhost. For this tutorial we will be assuming that your trac project will be accessible via: 
     295=== Setup === 
     296 
     297 1. Please make sure you have first have a working install of a Trac project. Test install with “tracd” first. 
     298 
     299 2. Create a Virtual Host for this setup. From now on we will refer to this vhost as !TracVhost. For this tutorial we will be assuming that your trac project will be accessible via: 
    284300 
    285301{{{ 
     
    287303}}} 
    288304 
    289 3) Go “TracVhost → External Apps” tab and create a new “External Application”. 
     305 3. Go “!TracVhost → External Apps” tab and create a new “External Application”. 
    290306 
    291307{{{ 
     
    305321}}} 
    306322 
    307 4) Optional. If you need to use htpasswd based authentication. Go to “TracVhost → Security” tab and create a new security “Realm”. 
     323 4. Optional. If you need to use htpasswd based authentication. Go to “!TracVhost → Security” tab and create a new security “Realm”. 
    308324 
    309325{{{ 
     
    315331If you don’t have a htpasswd file or don’t know how to create the entries within one, go to http://sherylcanter.com/encrypt.php, to generate the user:password combos. 
    316332 
    317 5) Go to “PythonVhost → Contexts” and create a new “FCGI Context”. 
     333 5. Go to “!PythonVhost → Contexts” and create a new “FCGI Context”. 
    318334 
    319335{{{ 
     
    323339}}} 
    324340 
    325 6) Modify /fullpathto/mytracproject/conf/trac.ini 
     341 6. Modify `/fullpathto/mytracproject/conf/trac.ini` 
    326342 
    327343{{{ 
     
    332348}}} 
    333349 
    334 7) Restart !LiteSpeed, “lswsctrl restart”, and access your new Trac project at:  
     350 7. Restart !LiteSpeed, “lswsctrl restart”, and access your new Trac project at:  
    335351 
    336352{{{ 
     
    338354}}} 
    339355 
    340 === Simple Nginx Configuration === 
    341  
    342 1) Nginx configuration snippet - confirmed to work on 0.6.32 
     356== Simple Nginx Configuration == 
     357 
     358 1. Nginx configuration snippet - confirmed to work on 0.6.32 
    343359{{{ 
    344360    server { 
     
    387403            fastcgi_param  SERVER_PORT        $server_port; 
    388404            fastcgi_param  SERVER_PROTOCOL    $server_protocol; 
     405            fastcgi_param  QUERY_STRING     $query_string; 
    389406 
    390407            # for authentication to work 
     
    395412}}} 
    396413 
    397 2) Modified trac.fcgi: 
     414 2. Modified trac.fcgi: 
    398415 
    399416{{{ 
     
    429446}}} 
    430447 
    431 3) reload nginx and launch trac.fcgi like that: 
     448 3. reload nginx and launch trac.fcgi like that: 
    432449 
    433450{{{ 
     
    437454The above assumes that: 
    438455 * There is a user named 'trac' for running trac instances and keeping trac environments in its home directory. 
    439  * /home/trac/instance contains a trac environment 
    440  * /home/trac/htpasswd contains authentication information 
    441  * /home/trac/run is owned by the same group the nginx runs under 
    442   * and if your system is Linux the /home/trac/run has setgid bit set (chmod g+s run) 
     456 * `/home/trac/instance` contains a trac environment 
     457 * `/home/trac/htpasswd` contains authentication information 
     458 * `/home/trac/run` is owned by the same group the nginx runs under 
     459  * and if your system is Linux the `/home/trac/run` has setgid bit set (`chmod g+s run`) 
    443460  * and patch from ticket #T7239 is applied, or you'll have to fix the socket file permissions every time 
    444461