Openstack安装过程中pkg_resources.DistributionNotFound的问题解决办法

使用DevStack安装OpenStack Icehouse时出现pkg_resources.DistributionNotFound的问题解决办法

现象：
File "/usr/local/bin/glance-manage", line 5, in
      from pkg_resources import load_entry_point
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3018, in
      working_set = WorkingSet._build_master()
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 614, in _build_master
      return cls._build_from_requirements(__requires__)
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 627, in _build_from_requirements
      dists = ws.resolve(reqs, Environment())
    File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 805, in resolve
      raise DistributionNotFound(req)
  pkg_resources.DistributionNotFound: oslo.config<1.5,>=1.2.0

解决办法：安装版本少于1.1.8的django-openstack-auth
sudo easy_install django-openstack-auth==1.1.7

参考：