问题：ubuntu14.04安装mitaka版本的devstack时，报错：attributeError: 'module' object has no attribute '__version__' 最终解决问题的方案参见: https://ask.openstack.org/en/question/56412/juno-devstack-install-failure-attributeerror-module-object-has-no-attribute-wraps/ 解决方法是： edit the file /usr/local/lib/python2.7/dist-packages/openstack/session.py and remove the .__version__ at line 29. DEFAULT_USER_AGENT = "openstacksdk/%s" % openstack.__version__ DEFAULT_USER_AGENT = "openstacksdk/%s" % openstack