devstack安装OpenStack时候报错如下：
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11870 2015-05-27 07:24:58.982 | usage: openstack image list [-h] [-f {csv,html,json,table,yaml}] [-c COLUMN]
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11871 2015-05-27 07:24:58.983 | [--max-width <integer>]
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11872 2015-05-27 07:24:58.983 | [--quote {all,minimal,none,nonnumeric}]
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11873 2015-05-27 07:24:58.983 | [--page-size <size>] [--long]
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11874 2015-05-27 07:24:58.983 | openstack image list: error: unrecognized arguments: --property status=active
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11875 2015-05-27 07:24:59.031 | ++ case "${#images[*]}" in
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11876 2015-05-27 07:24:59.031 | ++ echo 'Found no valid images to use!'
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11877 2015-05-27 07:24:59.031 | Found no valid images to
这主要是由于python-openstackclient的版本太低导致的，openstack image list命令执行的时候不识别参数--property，只要升级即可解决。
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sudo pip install python-openstackclient --upgrade
