RT ，最近搭建 devstack 的环境， 更换 source.list 为阿狸源， 更换 PIP 为豆瓣，系统为 ubuntu 14.04.4 server x64 ，只安装了 openssh-server ， mirror 为 http://git.trystack.cn ， 参考安装文档为 http://www.chenshake.com/openstack-project-series-3-devstack/ （目前这域名好像过期了） 问题来了， 安装完访问 UI 的时候 ，提示如下

 python compress.py compress
Traceback (most recent call last):
  File "compress.py", line 5, in <module>
    from compressor.cache import (cache_get, cache_set, get_offline_hexdigest,
  File "/usr/local/lib/python2.7/dist-packages/compressor/cache.py", line 8, in <module>
    from django.core.cache import caches
  File "/usr/local/lib/python2.7/dist-packages/django/core/cache/__init__.py", line 34, in <module>
    if DEFAULT_CACHE_ALIAS not in settings.CACHES:
  File "/usr/local/lib/python2.7/dist-packages/django/conf/__init__.py", line 48, in __getattr__
    self._setup(name)
  File "/usr/local/lib/python2.7/dist-packages/django/conf/__init__.py", line 42, in _setup
    % (desc, ENVIRONMENT_VARIABLE))
django.core.exceptions.ImproperlyConfigured: Requested setting CACHES, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

提示很长，这里只 提取了部分认为有用的

到现在我都还不成功是否安装成功， 各组件还不熟悉，也不知道查看， google 到的大都是英文，把我都看蒙蔽了， 希望各位指点下迷津，告诉我怎么才算安装成功 ，谢谢！