Cobbler GUI failing on DJANGO_SETTINGS_MODULE

[georgeslee]

Installed on Centos 6.3 x86_64
cobbler.noarch 2.2.3-2.el6 @epel
cobbler-web.noarch 2.2.3-2.el6 @epel

cobbler sync works no problem, but the web gui throws this error:

MOD_PYTHON ERROR

ProcessId: 4507
Interpreter: 'cobbler.wil'

ServerName: 'cobbler.wil'
DocumentRoot: '/var/www/html'

URI: '/cobbler_web'
Location: '/cobbler_web'
Directory: None
Filename: '/var/www/html/cobbler_web'
PathInfo: ''

Phase: 'PythonAuthenHandler'
Handler: 'cobbler_web.views'

Traceback (most recent call last):

File "/usr/lib64/python2.6/site-packages/mod_python/importer.py", line 1537, in HandlerDispatch
default=default_handler, arg=req, silent=hlist.silent)

File "/usr/lib64/python2.6/site-packages/mod_python/importer.py", line 1202, in _process_target
module = import_module(module_name, path=path)

File "/usr/lib64/python2.6/site-packages/mod_python/importer.py", line 304, in import_module
return import(module_name, {}, {}, ['*'])

File "/usr/share/cobbler/web/cobbler_web/views.py", line 6, in
from django.shortcuts import render_to_response

File "/usr/lib/python2.6/site-packages/django/shortcuts/init.py", line 10, in
from django.db.models.manager import Manager

File "/usr/lib/python2.6/site-packages/django/db/init.py", line 14, in
if not settings.DATABASES:

File "/usr/lib/python2.6/site-packages/django/utils/functional.py", line 276, in getattr
self._setup()

File "/usr/lib/python2.6/site-packages/django/conf/init.py", line 40, in _setup
raise ImportError("Settings cannot be imported, because environment variable %s is undefined." % ENVIRONMENT_VARIABLE)

ImportError: Settings cannot be imported, because environment variable DJANGO_SETTINGS_MODULE is undefined.

[jimi-c]

Have you upgraded recently? It would seem that the WSGI script is not behaving correctly, which is in /usr/share/cobbler/web/cobbler.wsgi

This file should look something like this:

import os
import sys
os.environ['DJANGO_SETTINGS_MODULE'] = 'settings'
os.environ['PYTHON_EGG_CACHE'] = '/var/lib/cobbler/webui_cache'
sys.path.append('/usr/share/cobbler/web')
sys.path.append('/usr/share/cobbler/web/cobbler_web')
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()

Did you upgrade from an older version or copy config files over from an older version? Make sure the cobbler_web.conf file matches what is in the master git repository, and make sure there aren't any .rpmnew files in /etc/httpd/conf.d/ related to cobbler.

[georgeslee]

Thanks! I followed another write up which modified cobbler_web.conf that
was faulty!

On Thu, Nov 1, 2012 at 5:29 AM, James Cammarata notifications@github.comwrote:

Have you upgraded recently? It would seem that the WSGI script is not
behaving correctly, which is in /usr/share/cobbler/web/cobbler.wsgi

This file should look something like this:

import os
import sys

os.environ['DJANGO_SETTINGS_MODULE'] = 'settings'
os.environ['PYTHON_EGG_CACHE'] = '/var/lib/cobbler/webui_cache'
sys.path.append('/usr/share/cobbler/web')
sys.path.append('/usr/share/cobbler/web/cobbler_web')

import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()

Did you upgrade from an older version or copy config files over from an
older version? Make sure the cobbler_web.conf file matches what is in the
master git repository, and make sure there aren't any .rpmnew files in
/etc/httpd/conf.d/ related to cobbler.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/348#issuecomment-9978563.

[jimi-c]

No problem, let me know if you have any more problems.

[madkiss]

@georgeslee it would have been incredibly helpful could you have left behind a comment on which other write up you found and what exactly was faulty with regards to your cobbler_web.conf.

[eklein]

Argh, I've hit this too and would love to see the solution as well.

Any ideas?

[jimi-c]

@eklein Make sure you're using the cobbler_web.conf file from the git repo. Are you seeing the exact same error?

[eklein]

@jimi-c, That's exactly what I ended up having to do. For anyone else who runs into the issue, the main piece I had to fix was related to mod_python vs mod_wsgi in cobbler_web.conf. I had upgraded cobbler and cobbler_web from 2.0 to 2.4. I had to replace everything associated with the mod_python config:

<Location "/cobbler_web">
    SetHandler python-program
    PythonHandler django.core.handlers.modpython
    SetEnv DJANGO_SETTINGS_MODULE settings
    # PythonOption django.root /cobbler_web
    PythonDebug On
    PythonPath "['/usr/share/cobbler/web/'] + sys.path"
    AuthBasicAuthoritative Off
    AuthType basic
    AuthName "Cobbler"
    Require valid-user
    PythonAuthenHandler cobbler_web.views
</Location>

with:

WSGIScriptAlias /cobbler_web /usr/share/cobbler/web/cobbler.wsgi

My cobbler.conf was still stock (matches what's in the git repo). Once I got that functioning, I went through /etc/cobbler/settings and adapted any changes I had made to the new settings file (was placed in /etc/cobbler/settings.rpmnew). I then replaced /etc/cobbler/settings with the new file that I had modified. Finally, I had to add the following lines to the bottom of my /etc/cobbler/modules.conf:

[tftpd]
module = manage_in_tftpd

Once I'd made all of my changes, I ran a cobbler sync, /etc/init.d/cobblerd restart, as well as a cobbler check to find any lingering problems with my installation.

I appreciate the response, this ended up being a simple solution but was fairly painful to work through :)

[koolipaasha]

@eklein I tried all the above steps,but still web page shows internal server error with this in error log:

[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] mod_wsgi (pid=16954): Exception occurred processing WSGI script '/usr/share/cobbler/web/cobbler.wsgi'.
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] Traceback (most recent call last):
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] File "/usr/lib/python2.4/site-packages/django/core/handlers/wsgi.py", line 230, in call
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] self.load_middleware()
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] File "/usr/lib/python2.4/site-packages/django/core/handlers/base.py", line 33, in load_middleware
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] for middleware_path in settings.MIDDLEWARE_CLASSES:
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] File "/usr/lib/python2.4/site-packages/django/utils/functional.py", line 269, in getattr
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] self._setup()
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] File "/usr/lib/python2.4/site-packages/django/conf/init.py", line 40, in _setup
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] self._wrapped = Settings(settings_module)
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] File "/usr/lib/python2.4/site-packages/django/conf/init.py", line 108, in init
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] os.environ['TZ'] = self.TIME_ZONE
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] File "/usr/lib64/python2.4/os.py", line 463, in setitem
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] putenv(key, item)
[Wed Sep 10 19:22:57 2014] [error] [client X.X.X.135] TypeError: putenv() argument 2 must be string, not None

Can you tell me whats wrong here: