执行keystone-manage pki_setup报错

[root@moban src]# keystone-manage pki_setup --keystone-user root --keystone-group root
/usr/lib/python2.6/site-packages/keystoneclient/access.py:20: DeprecationWarning: The oslo namespace package is deprecated. Please use oslo_utils instead.
  from oslo.utils import timeutils
Traceback (most recent call last):
  File "/usr/bin/keystone-manage", line 37, in <module>
    from keystone import cli
  File "/usr/lib/python2.6/site-packages/keystone/cli.py", line 27, in <module>
    from keystone import token
  File "/usr/lib/python2.6/site-packages/keystone/token/__init__.py", line 17, in <module>
    from keystone.token import controllers
  File "/usr/lib/python2.6/site-packages/keystone/token/controllers.py", line 18, in <module>
    from keystoneclient.common import cms
  File "/usr/lib/python2.6/site-packages/keystoneclient/__init__.py", line 28, in <module>
    from keystoneclient import client
  File "/usr/lib/python2.6/site-packages/keystoneclient/client.py", line 13, in <module>
    from keystoneclient import discover
  File "/usr/lib/python2.6/site-packages/keystoneclient/discover.py", line 19, in <module>
    from keystoneclient import session as client_session
  File "/usr/lib/python2.6/site-packages/keystoneclient/session.py", line 21, in <module>
from oslo.serialization import jsonutils
ImportError: No module named serialization
执行keystone-manage pki_setup报错，请大牛们帮忙处理下，谢谢了！

这是哪一步？从来没有见到过。
对于所有的错误两种解决办法：
1.看日志，贴出日志的错误，但是一定会看，否则可能会看错或则找不到
2.配置文件错误

楼主 这问题解决了没呢