使用 kolla-ansible 部署 opnenstack:stein，最后无法导入变量脚本，报错信息如下：
[root@kolla ~]# . /etc/kolla/admin-openrc.sh
[root@kolla ~]# /usr/share/kolla-ansible/init-runonce
Traceback (most recent call last):
File "/usr/bin/openstack", line 5, in <module>
from openstackclient.shell import main
File "/usr/lib/python2.7/site-packages/openstackclient/shell.py", line 24, in <module>
from osc_lib import shell
File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 33, in <module>
from osc_lib.cli import client_config as cloud_config
File "/usr/lib/python2.7/site-packages/osc_lib/cli/client_config.py", line 18, in <module>
from openstack.config import exceptions as sdk_exceptions
File "/usr/lib/python2.7/site-packages/openstack/__init__.py", line 17, in <module>
import openstack.connection
File "/usr/lib/python2.7/site-packages/openstack/connection.py", line 188, in <module>
from openstack.cloud import openstackcloud as _cloud
File "/usr/lib/python2.7/site-packages/openstack/cloud/openstackcloud.py", line 21, in <module>
import dogpile.cache
File "/usr/lib/python2.7/site-packages/dogpile/cache/__init__.py", line 1, in <module>
from .region import CacheRegion # noqa
File "/usr/lib/python2.7/site-packages/dogpile/cache/region.py", line 12, in <module>
from decorator import decorate
ImportError: cannot import name decorate
解决方法：
sed -i '/^from decorator import decorate/s/from/#from/' /usr/lib/python2.7/site-packages/dogpile/cache/region.py