Changes between Version 3 and Version 4 of TracFastCgi


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Timestamp:
Jul 12, 2012, 8:06:20 PM (12 years ago)
Author:
trac
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  • TracFastCgi

    v3 v4  
     1[[PageOutline]]
     2
    13= Trac with FastCGI =
    24
    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].
     5[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 much wider variety of web servers.
     6
     7Note that unlike mod_python, FastCGI supports [http://httpd.apache.org/docs/suexec.html Apache SuEXEC], i.e. run with different permissions than web server running with (`mod_wsgi` supports the `WSGIDaemonProcess` with user / group parameters to achieve the same effect).
     8
     9'''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].
     10
     11[[PageOutline(2-3,Overview,inline)]]
     12
    613
    714== Simple Apache configuration ==
    … …  
    1017`mod_fcgid` (preferred). The latter is more up-to-date.
    1118
    12 ==== setup with `mod_fastcgi` ====
     19The following sections focus on the FCGI specific setup, see also [wiki:TracModWSGI#ConfiguringAuthentication] for configuring the authentication in Apache.
     20
     21Regardless of which cgi module is used, be sure the web server has executable permissions on the cgi-bin folder. While FastCGI will throw specific permissions errors, mod_fcgid will throw an ambiguous error if this has not been done. (Connection reset by peer: mod_fcgid: error reading data from FastCGI server)
     22
     23=== Set up with `mod_fastcgi` ===
    1324`mod_fastcgi` uses `FastCgiIpcDir` and `FastCgiConfig` directives that should be added to an appropriate Apache configuration file:
    1425{{{
    … …  
    2738calling `trac.fcgi` instead of `trac.cgi`.
    2839
    29 You can set up the `TRAC_ENV` as an overall default:
     40Add the following to the Apache configuration file (below the `FastCgiIpcDir` line) if you intend to set up the `TRAC_ENV` as an overall default:
    3041{{{
    3142FastCgiConfig -initial-env TRAC_ENV=/path/to/env/trac
    3243}}}
    3344
    34 Or you can serve multiple Trac projects in a directory like:
     45Alternatively, you can serve multiple Trac projects in a directory by adding this:
    3546{{{
    3647FastCgiConfig -initial-env TRAC_ENV_PARENT_DIR=/parent/dir/of/projects
    3748}}}
    3849
    39 ==== setup with `mod_fcgid` ====
     50=== Set up with `mod_fcgid` ===
    4051Configure `ScriptAlias` (see TracCgi for details), but call `trac.fcgi`
    4152instead of `trac.cgi`. Note that slash at the end - it is important.
    … …  
    4455}}}
    4556
    46 To setup Trac environment for `mod_fcgid` it is necessary to use
     57To set up Trac environment for `mod_fcgid` it is necessary to use
    4758`DefaultInitEnv` directive. It cannot be used in `Directory` or
    4859`Location` context, so if you need to support multiple projects, try
    … …  
    5364}}}
    5465
    55 ==== alternative environment setup ====
    56 A better method to specify path to Trac environment it to embed the path
     66=== alternative environment setup ===
     67A better method to specify path to Trac environment is to embed the path
    5768into `trac.fcgi` script itself. That doesn't require configuration of server
    5869environment variables, works for both FastCgi modules
    … …  
    93104
    94105After 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.
    95 The 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/''
     106The 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).
     107
     108Note:\\
     109If 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.\\
     110Python-flup is a dependency which provides trac with SCGI capability. You can install it on debian based systems with:
     111{{{
     112sudo apt-get install python-flup
     113}}}
     114
    96115
    97116== Simple Lighttpd Configuration ==
    … …  
    123142using `bin-environment` (as in the section above on Apache configuration).
    124143
    125 Note 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.
     144Note 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 [trac:#2418]). This should be fixed since lighttpd 1.4.23, and you may need to add `"fix-root-scriptname" => "enable"` as parameter of fastcgi.server.
    126145
    127146For using two projects with lighttpd add the following to your `lighttpd.conf`:
    … …  
    152171Note that the above will result in different processes in any event, even
    153172if both are running from the same `trac.fcgi` script.
     173
    154174{{{
    155175#!div class=important
    156176'''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.
    157177}}}
     178
    158179For authentication you should enable mod_auth in lighttpd.conf 'server.modules', select auth.backend and auth rules:
    159180{{{
    … …  
    203224server.modules += ("mod_alias")
    204225
    205 # Setup an alias for the static resources
     226# Set up an alias for the static resources
    206227alias.url = ("/trac/chrome/common" => "/usr/share/trac/htdocs")
    207228
    … …  
    269290For details about languages specification see [trac:TracFaq TracFaq] question 2.13.
    270291
    271 Other 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.
    272 
    273 If you use trac-0.9, read [http://lists.edgewall.com/archive/trac/2005-November/005311.html about small bug]
     292Other important information like the [wiki:TracInstall#MappingStaticResources mapping static resources advices] are useful for non-fastcgi specific installation aspects.
     293]
    274294
    275295Relaunch lighttpd, and browse to `http://yourhost.example.org/trac` to access Trac.
    … …  
    277297Note about running lighttpd with reduced permissions:
    278298
    279   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.
     299If 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.
    280300
    281301
    … …  
    285305
    286306!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.
    287 
    288 === Setup ===
    289307
    290308 1. Please make sure you have first have a working install of a Trac project. Test install with “tracd” first.
    … …  
    347365}}}
    348366
     367
    349368== Simple Nginx Configuration ==
    350369
    351  1. Nginx configuration snippet - confirmed to work on 0.6.32
     370Nginx is able to communicate with FastCGI processes, but can not spawn them. So you need to start FastCGI server for Trac separately.
     371
     372 1. Nginx configuration with basic authentication handled by Nginx - confirmed to work on 0.6.32
    352373{{{
    353374    server {
    … …  
    368389        if ($uri ~ ^/(.*)) {
    369390             set $path_info /$1;
     391        }
     392
     393        # it makes sense to serve static resources through Nginx
     394        location /chrome/ {
     395             alias /home/trac/instance/static/htdocs/;
    370396        }
    371397
    … …  
    396422            fastcgi_param  SERVER_PORT        $server_port;
    397423            fastcgi_param  SERVER_PROTOCOL    $server_protocol;
    398             fastcgi_param  QUERY_STRING     $query_string;
    399 
    400             # for authentication to work
     424            fastcgi_param  QUERY_STRING       $query_string;
     425
     426            # For Nginx authentication to work - do not forget to comment these
     427            # lines if not using Nginx for authentication
    401428            fastcgi_param  AUTH_USER          $remote_user;
    402429            fastcgi_param  REMOTE_USER        $remote_user;
     430
     431            # for ip to work
     432            fastcgi_param REMOTE_ADDR         $remote_addr;
     433
     434            # For attchments to work
     435            fastcgi_param    CONTENT_TYPE     $content_type;
     436            fastcgi_param    CONTENT_LENGTH   $content_length;
    403437        }
    404438    }