使用Keystone v2.0 Python API从OpenStack获取租户列表

Question

我刚接触OpenStack，想通过Keystone v2.0的Python API来获取OpenStack虚拟机中的租户列表。

from keystoneclient.v2_0 import client as ksclient
keystone_client = ksclient.Client(token='token', endpoint='http://1.1.1.1:35357/v2.0')
keystone_client.tenants.list()

但是上面的操作失败了，出现了以下错误：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/keystoneclient/v2_0/tenants.py", line 116, in list
    tenant_list = self._list("/tenants%s" % query, "tenants")
  File "/usr/lib/python2.7/dist-packages/keystoneclient/base.py", line 68, in _list
    resp, body = self.api.get(url)
  File "/usr/lib/python2.7/dist-packages/keystoneclient/client.py", line 587, in get
    return self._cs_request(url, 'GET', **kwargs)
  File "/usr/lib/python2.7/dist-packages/keystoneclient/client.py", line 583, in _cs_request
    **kwargs)
  File "/usr/lib/python2.7/dist-packages/keystoneclient/client.py", line 555, in request
    raise exceptions.from_response(resp, body or resp.text)
keystoneclient.exceptions.ClientException: Unable to communicate with identity service:         <TITLE> Cannot Connect </TITLE>

<H2>Cannot Connect</H2>

你能分享一下你的看法吗？

Answer 1

看起来keystone服务已经停止了。

如果你在使用devstack，可以检查一下keystone进程是否在运行。

可以用这个命令：ps -ef | grep keystone

如果你是手动安装keystone作为服务的话，

可以用这个命令：service --status-all | grep keystone

如果你在使用devstack，可以重新加入堆栈，按Ctrl + A + 1可以查看keystone的日志。

cd /path/to/devstack
./rejoin-stack.sh