Installing is quick and easy:
Run pip install django_openstack_auth.
Add openstack_auth to settings.INSTALLED_APPS.
Add 'keystone_auth.backend.KeystoneBackend' to your settings.AUTHENTICATION_BACKENDS, e.g.:
AUTHENTICATION_BACKENDS = ('keystone_auth.backend.KeystoneBackend',)
Configure your API endpoint(s) in settings.py:
OPENSTACK_KEYSTONE_URL = "http://example.com:5000/v3"
Include 'keystone_auth.urls' somewhere in your urls.py file.
Use it as you would any other Django auth backend.