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Trac과 mod_python

Trac supports mod_python, which speeds up Trac's response times considerably, especially compared to CGI, and permits use of many Apache features not possible with tracd/mod_proxy.

간단한 설정

mod_python을 설치했다면, Apach 설정에서 모듈을 로드하기 위해서 다음 라인을 추가해야할지도 모릅니다.:

LoadModule python_module modules/mod_python.so

Note: The exact path to the module depends on how the HTTPD installation is laid out.

You can test your mod_python installation by adding the following to your httpd.conf. You should remove this when you are done testing for security reasons.

<Location /mpinfo>
   SetHandler mod_python
   PythonHandler mod_python.testhandler
</Location>

mod_python을 사용하기 위한 Trac의 간단한 설정은 다음과 같습니다.:

<Location /projects/myproject>
   SetHandler mod_python
   PythonHandler trac.web.modpython_frontend 
   PythonOption TracEnv /var/trac/myproject
   PythonOption TracUriRoot /projects/myproject
</Location>

The option TracUriRoot may or may not be necessary in your setup. Try your configuration with out it, and if the URLs produced by Trac look wrong or if Trac does not seem to recognize the URLs correctly, add the TracUriRoot option. You will notice that the Location and TracUriRoot have the same path.

Configuring Authentication

Configuring authentication works just like for CGI:

<Location "/projects/myproject/login">
  AuthType Basic
  AuthName "myproject"
  AuthUserFile /var/trac/myproject/.htpasswd
  Require valid-user
</Location>

Setting the PythonPath

만약 Trac이 Python 경로에 설치되지 않았다면, Apache에서 PythonPath 지시자를 사용해서 Trac의 mod_python 핸들러가 어디에 있는지를 설정해야합니다.:

<Location /projects/myproject>
  ...
  PythonPath "sys.path + ['/path/to/trac']"
  ...
</Location>

Be careful about using the PythonPath directive, and not SetEnv PYTHONPATH, as the latter won't work.

여러개의 프로젝트 설정하기

The Trac mod_python handler supports a configuration option similar to Subversion's SvnParentPath, called TracEnvParentDir:

<Location /projects>
  SetHandler mod_python
  PythonHandler trac.web.modpython_frontend 
  PythonOption TracEnvParentDir /var/trac
  PythonOption TracUriRoot /projects
</Location>

When you request the /projects URL, you will get a listing of all subdirectories of the directory you set as TracEnvParentDir that look like Trac environment directories. Selecting any project in the list will bring you to the corresponding Trac environment.

프로젝트 홈페이지에서 서브디렉토리의 리스트를 보기를 원하지 않는다면 다음과 같이 설정하삽시오.:

<LocationMatch "/.+/">

이렇게 설정하면 DocumentRoot 디렉토리에 메인 페이지가 존재할 가능성이 있는 한은, 루트경로와는 다른 모든 경로에 대해서 mod_python을 사용하도록 할 것입니다.

<LocationMatch> 지시자를 사용하면 모든 프로젝트에 대해서 같은 인증방식을 사용할 수 있습니다.:

<LocationMatch "/projects/[^/]+/login">
  AuthType Basic
  AuthName "Trac"
  AuthUserFile /var/trac/.htpasswd
  Require valid-user
</LocationMatch>

Virtual Host Configuration

Below is the sample configuration required to set up your trac as a virtual server (i.e. when you access it at the URLs like http://trac.mycompany.com):

<VirtualHost * >
    DocumentRoot /var/trac/myproject
    ServerName trac.mycompany.com
    <Location />
        SetHandler mod_python
        PythonHandler trac.web.modpython_frontend
        PythonOption TracEnv /var/trac/myproject
        PythonOption TracUriRoot /
    </Location>
    <Location /login>
        AuthType Basic
        AuthName "MyCompany Trac Server"
        AuthUserFile /var/trac/myproject/.htpasswd
        Require valid-user
    </Location>
</VirtualHost>

For a virtual host that supports multiple projects replace "TracEnv" /var/trac/myproject with "TracEnvParentDir" /var/trac/

문제해결

In general, if you get server error pages, you can either check the Apache error log, or enable the PythonDebug option:

<Location /projects/myproject>
  ...
  PythonDebug on
</Location>

Form submission problems

If you're experiencing problems submitting some of the forms in Trac (a common problem is that you get redirected to the start page after submission), check whether your DocumentRoot contains a folder or file with the same path that you mapped the mod_python handler to. For some reason, mod_python gets confused when it is mapped to a location that also matches a static resource.

Problem with virtual host configuration

If the <Location /> directive is used, setting the DocumentRoot may result in a 403 (Forbidden) error. Either remove the DocumentRoot directive, or make sure that accessing the directory it points is allowed (in a corresponding <Directory> block).

Using <Location /> together with SetHandler resulted in having everything handled by mod_python, which leads to not being able download any CSS or images/icons. I used <Location /trac> SetHandler None </Location> to circumvent the problem, though I do not know if this is the most elegant solution.

.htaccess 사용하기

Although it may seem trivial to rewrite the above configuration as a directory in your document root with a .htaccess file, this does not work. Apache will append a "/" to any Trac URLs, which interferes with its correct operation.

It may be possible to work around this with mod_rewrite, but I failed to get this working. In all, it is more hassle than it is worth. Stick to the provided instructions. :)

Win32 Issues

If you run trac with mod_python < 3.2 on Windows, uploading attachments will not work. This problem is resolved in mod_python 3.1.4 or later, so please upgrade mod_python to fix this.

OS X에서의 문제점

OS X에서 mod_python을 사용한다면, apachectl restart 명령을 사용해서 Apache를 재시작할 수 없을 것입니다. 이 문제는 외관상으로는 mod_python 3.2 버전에서 고쳐졌습니다. 이전 버전에서 사용할 수 있는 패치도 존재합니다.

SELinux issues

If Trac reports something like: Cannot get shared lock on db.lock The security context on the repository may need to be set:

chcon -R -h -t httpd_sys_content_t PATH_TO_REPOSITORY

See also [http://subversion.tigris.org/faq.html#reposperms]

FreeBSD issues

Pay attention to the version of the installed mod_python and sqlite packages. Ports have both the new and old ones, but earlier versions of pysqlite and mod_python won't integrate as the former requires threaded support in python, and the latter requires a threadless install.

Subversion issues

If you get the following Trac Error Unsupported version control system "svn" only under mod_python, though it works well on the command-line and even with TracStandalone, chances are that you forgot to add the path to the Python bindings with the PythonPath directive. (The better way is to add a link to the bindings in the Python site-packages directory, or create a .pth file in that directory.)

If this is not the case, it's possible that you're using Subversion libraries that are binary incompatible with the apache ones (an incompatibility of the apr libraries is usually the cause). In that case, you also won't be able to use the svn modules for Apache (mod_dav_svn).

참고 : TracGuide, TracInstall, TracCgi, TracFastCgi

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