If you happen to use Cobbler 2.6 (even the last release of 2.6 – 2.6.11) you may encounter the following error when you try loading the Cobbler web interface:
AppRegistryNotReady at /distro/list Apps aren't loaded yet. Request Method: GET Request URL: https://192.168.0.25/cobbler_web/distro/list Django Version: 1.8.7 Exception Type: AppRegistryNotReady Exception Value: Apps aren't loaded yet. Exception Location: /usr/lib/python2.7/dist-packages/django/apps/registry.py in check_apps_ready, line 124 Python Executable: /usr/bin/python Python Version: 2.7.12 Python Path: ['/usr/local/share/cobbler/web/cobbler_web', '/usr/local/share/cobbler/web', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages'] Server time: Sun, 13 Oct 2019 21:24:30 -0400
The Cobbler web does not work properly. The Django application is not started properly.
It is a known error and it is easily fixable by editing the Cobbler web source file “/usr/local/share/cobbler/web/cobbler.wsgi” (or /usr/share/cobbler/web/cobbler.wsgi) and replacing the two lines:
import django.core.handlers.wsgi
_application = django.core.handlers.wsgi.WSGIHandler()
With the code:
from django.core.wsgi import get_wsgi_application
_application = get_wsgi_application()
Note the “_application” variable starts with underline.
In fact, Cobbler 2.4 has the same issue, but the variable is “application” without underline in the start and there is no return line at the end of the file (in 2.6 there is a return clause and you must leave it there!)
import django.core.handlers.wsgi application = django.core.handlers.wsgi.WSGIHandler()
replace with
from django.core.wsgi import get_wsgi_application application = get_wsgi_application()
It is highly unlikely to use Cobbler 2.4, but still, if you need it and you come across this page this is the fix for the Cobbler web and be careful with the variable name _application – application for the various Cobbler versions.