openstack keystone源码安装问题

centos6.5系统
keystone.2014.1版本
[root@linux-node1 keystone-2014.1]# pip freeze | grep oslo
oslo.config==2.0.0
oslo.context==0.4.0
oslo.i18n==2.1.0
oslo.log==1.6.0
oslo.messaging==2.0.0
oslo.middleware==2.4.0
oslo.serialization==1.7.0
oslo.service==0.4.0
oslo.utils==2.0.0
[root@linux-node1 keystone-2014.1]#  keystone-manage pki_setup --keystone-user root --keystone-group root
Traceback (most recent call last):
  File "/usr/bin/keystone-manage", line 37, in
    from keystone import cli
  File "/usr/lib/python2.6/site-packages/keystone/cli.py", line 19, in
    from oslo.config import cfg
ImportError: No module named config