Changes between Version 1 and Version 2 of TracFastCgi


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Timestamp:
Aug 22, 2009 11:57:16 AM (15 years ago)
Author:
trac
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  • TracFastCgi

    v1 v2  
    22 
    33Since 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]. 
    46 
    57== Simple Apache configuration == 
    … …  
    79There are two FastCGI modules commonly available for Apache: `mod_fastcgi` and 
    810`mod_fcgid`.  The `FastCgiIpcDir` and `FastCgiConfig` directives discussed 
    9 below are `mod_fastcgi` directives; the `DefaultInitEnv` is a `mod_fgcid` 
     11below are `mod_fastcgi` directives; the `DefaultInitEnv` is a `mod_fcgid` 
    1012directive. 
    1113 
    … …  
    6264renaming `trac.fcgi` and adding the above code to create each such script. 
    6365 
     66See [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: 
     67{{{ 
     68ScriptAlias / /srv/tracsite/cgi-bin/trac.fcgi/ 
     69}}} 
     70 
     71== Simple Cherokee Configuration == 
     72 
     73The configuration on Cherokee's side is quite simple. You will only need to know that you can spawn Trac as an SCGI process. 
     74You can either start it manually, or better yet, automatically by letting Cherokee spawn the server whenever it is down. 
     75First set up an information source in cherokee-admin with a local interpreter. 
     76 
     77{{{ 
     78Host: 
     79localhost:4433 
     80 
     81Interpreter: 
     82/usr/bin/tracd —single-env —daemonize —protocol=scgi —hostname=localhost —port=4433 /path/to/project/ 
     83}}} 
     84 
     85If the port was not reachable, the interpreter command would be launched. Note that, in the definition of the information source, you will have to manually launch the spawner if you use a ''Remote host'' as ''Information source'' instead of a ''Local interpreter''. 
     86 
     87After doing this, we will just have to create a new rule managed by the SCGI handler to access Trac. It can be created in a new virtual server, trac.example.net for instance, and will only need two rules. The '''default''' one will use the SCGI handler associated to the previously created information source. 
     88The 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/'' 
     89 
    6490== Simple Lighttpd Configuration == 
    6591 
    … …  
    6995environments.  It has a very low memory footprint compared to other web servers and takes care of CPU load. 
    7096 
    71 For using `trac.fcgi` with lighttpd add the following to your lighttpd.conf: 
    72 {{{ 
     97For using `trac.fcgi`(prior to 0.11) / fcgi_frontend.py (0.11) with lighttpd add the following to your lighttpd.conf: 
     98{{{ 
     99#var.fcgi_binary="/path/to/fcgi_frontend.py" # 0.11 if installed with easy_setup, it is inside the egg directory 
     100var.fcgi_binary="/path/to/cgi-bin/trac.fcgi" # 0.10 name of prior fcgi executable 
    73101fastcgi.server = ("/trac" => 
     102    
    74103                   ("trac" => 
    75104                     ("socket" => "/tmp/trac-fastcgi.sock", 
    76                       "bin-path" => "/path/to/cgi-bin/trac.fcgi", 
     105                      "bin-path" => fcgi_binary, 
    77106                      "check-local" => "disable", 
    78107                      "bin-environment" => 
    … …  
    92121                   ("first" => 
    93122                    ("socket" => "/tmp/trac-fastcgi-first.sock", 
    94                      "bin-path" => "/path/to/cgi-bin/trac.fcgi", 
     123                     "bin-path" => fcgi_binary, 
    95124                     "check-local" => "disable", 
    96125                     "bin-environment" => 
    … …  
    101130                    ("second" => 
    102131                    ("socket" => "/tmp/trac-fastcgi-second.sock", 
    103                      "bin-path" => "/path/to/cgi-bin/trac.fcgi", 
     132                     "bin-path" => fcgi_binary, 
    104133                     "check-local" => "disable", 
    105134                     "bin-environment" => 
    … …  
    115144if both are running from the same `trac.fcgi` script. 
    116145{{{ 
    117 #!html 
    118 <p style="background: #fdc; border: 2px solid #d00; font-style: italic; padding: 0 .5em; margin: 1em 0;"> 
    119 <strong>Note from c00i90wn:</strong> It's very important the order on which server.modules are loaded, if mod_auth is not loaded <strong>BEFORE</strong> mod_fastcgi, then the server will fail to authenticate the user. 
    120 </p> 
     146#!div class=important 
     147'''Note''' It's very important the order on which server.modules are loaded, if mod_auth is not loaded '''BEFORE''' mod_fastcgi, then the server will fail to authenticate the user. 
    121148}}} 
    122149For authentication you should enable mod_auth in lighttpd.conf 'server.modules', select auth.backend and auth rules: 
    … …  
    177204                   ("trac" => 
    178205                     ("socket" => "/tmp/trac-fastcgi.sock", 
    179                       "bin-path" => "/path/to/cgi-bin/trac.fcgi", 
     206                      "bin-path" => fcgi_binary, 
    180207                      "check-local" => "disable", 
    181208                      "bin-environment" => 
    … …  
    196223                        ( 
    197224                          "socket" => "/tmp/trac.sock", 
    198                           "bin-path" => "/path/to/cgi-bin/trac.fcgi", 
     225                          "bin-path" => fcgi_binary, 
    199226                          "check-local" => "disable", 
    200227                          "bin-environment" => 
    … …  
    222249                   ("trac" => 
    223250                     ("socket" => "/tmp/trac-fastcgi.sock", 
    224                       "bin-path" => "/path/to/cgi-bin/trac.fcgi", 
     251                      "bin-path" => fcgi_binary, 
    225252                      "check-local" => "disable", 
    226253                      "bin-environment" => 
    … …  
    231258                 ) 
    232259}}} 
    233 For details about languages specification see TracFaq question 2.13. 
     260For details about languages specification see [trac:TracFaq TracFaq] question 2.13. 
    234261 
    235262Other important information like [http://trac.lighttpd.net/trac/wiki/TracInstall this updated TracInstall page], [wiki:TracCgi#MappingStaticResources and this] are useful for non-fastcgi specific installation aspects. 
    … …  
    244271 
    245272 
    246 == Simple LiteSpeed Configuration == 
     273== Simple !LiteSpeed Configuration == 
    247274 
    248275The FastCGI front-end was developed primarily for use with alternative webservers, such as [http://www.litespeedtech.com/ LiteSpeed]. 
    249276 
    250 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. 
     277!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. 
    251278 
    252279Setup 
    … …  
    293320URI: /trac/                              <--- URI path to bind to python fcgi app we created     
    294321Fast CGI App: [VHost Level] MyTractFCGI  <--- select the trac fcgi extapp we just created 
    295 Realm: TracUserDB                        <--- only if (4) is set. select ream created in (4) 
     322Realm: TracUserDB                        <--- only if (4) is set. select realm created in (4) 
    296323}}} 
    297324 
    … …  
    305332}}} 
    306333 
    307 7) Restart LiteSpeed, “lswsctrl restart”, and access your new Trac project at:  
     3347) Restart !LiteSpeed, “lswsctrl restart”, and access your new Trac project at:  
    308335 
    309336{{{ 
    … …  
    311338}}} 
    312339 
     340=== Simple Nginx Configuration === 
     341 
     3421) Nginx configuration snippet - confirmed to work on 0.6.32 
     343{{{ 
     344    server { 
     345        listen       10.9.8.7:443; 
     346        server_name  trac.example; 
     347 
     348        ssl                  on; 
     349        ssl_certificate      /etc/ssl/trac.example.crt; 
     350        ssl_certificate_key  /etc/ssl/trac.example.key; 
     351 
     352        ssl_session_timeout  5m; 
     353 
     354        ssl_protocols  SSLv2 SSLv3 TLSv1; 
     355        ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP; 
     356        ssl_prefer_server_ciphers   on; 
     357 
     358        # (Or ``^/some/prefix/(.*)``. 
     359        if ($uri ~ ^/(.*)) { 
     360             set $path_info /$1; 
     361        } 
     362 
     363        # You can copy this whole location to ``location [/some/prefix]/login`` 
     364        # and remove the auth entries below if you want Trac to enforce 
     365        # authorization where appropriate instead of needing to authenticate 
     366        # for accessing the whole site. 
     367        # (Or ``location /some/prefix``.) 
     368        location / { 
     369            auth_basic            "trac realm"; 
     370            auth_basic_user_file /home/trac/htpasswd; 
     371 
     372            # socket address 
     373            fastcgi_pass   unix:/home/trac/run/instance.sock; 
     374 
     375            # python - wsgi specific 
     376            fastcgi_param HTTPS on; 
     377 
     378            ## WSGI REQUIRED VARIABLES 
     379            # WSGI application name - trac instance prefix. 
     380            # (Or ``fastcgi_param  SCRIPT_NAME  /some/prefix``.) 
     381            fastcgi_param  SCRIPT_NAME        ""; 
     382            fastcgi_param  PATH_INFO          $path_info; 
     383 
     384            ## WSGI NEEDED VARIABLES - trac warns about them 
     385            fastcgi_param  REQUEST_METHOD     $request_method; 
     386            fastcgi_param  SERVER_NAME        $server_name; 
     387            fastcgi_param  SERVER_PORT        $server_port; 
     388            fastcgi_param  SERVER_PROTOCOL    $server_protocol; 
     389 
     390            # for authentication to work 
     391            fastcgi_param  AUTH_USER          $remote_user; 
     392            fastcgi_param  REMOTE_USER        $remote_user; 
     393        } 
     394    } 
     395}}} 
     396 
     3972) Modified trac.fcgi: 
     398 
     399{{{ 
     400#!/usr/bin/env python 
     401import os 
     402sockaddr = '/home/trac/run/instance.sock' 
     403os.environ['TRAC_ENV'] = '/home/trac/instance' 
     404 
     405try: 
     406     from trac.web.main import dispatch_request 
     407     import trac.web._fcgi 
     408 
     409     fcgiserv = trac.web._fcgi.WSGIServer(dispatch_request,  
     410          bindAddress = sockaddr, umask = 7) 
     411     fcgiserv.run() 
     412 
     413except SystemExit: 
     414    raise 
     415except Exception, e: 
     416    print 'Content-Type: text/plain\r\n\r\n', 
     417    print 'Oops...' 
     418    print 
     419    print 'Trac detected an internal error:' 
     420    print 
     421    print e 
     422    print 
     423    import traceback 
     424    import StringIO 
     425    tb = StringIO.StringIO() 
     426    traceback.print_exc(file=tb) 
     427    print tb.getvalue() 
     428 
     429}}} 
     430 
     4313) reload nginx and launch trac.fcgi like that: 
     432 
     433{{{ 
     434trac@trac.example ~ $ ./trac-standalone-fcgi.py  
     435}}} 
     436 
     437The above assumes that: 
     438 * 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) 
     443  * and patch from ticket #T7239 is applied, or you'll have to fix the socket file permissions every time 
     444 
     445Unfortunately nginx does not support variable expansion in fastcgi_pass directive.  
     446Thus it is not possible to serve multiple trac instances from one server block.  
     447 
     448If you worry enough about security, run trac instances under separate users.  
     449 
     450Another way to run trac as a FCGI external application is offered in ticket #T6224 
     451 
    313452---- 
    314 See also TracCgi, TracModPython, TracInstall, TracGuide 
     453See also:  TracGuide, TracInstall, [wiki:TracModWSGI ModWSGI], [wiki:TracCgi CGI], [wiki:TracModPython ModPython], [trac:TracNginxRecipe TracNginxRecipe]