OpenStack Grizzly实例重启之后cinder-volume服务无法启动的解决办法
问题描述：Cinder组件装在Controller节点，节点发生故障重启后，发现挂载了volumn的实例无法启动，并且无法创建及挂载定的volume，查看cinder-volume服务，处于stop状态，执行启动命令发现无法启动，错误日志如下：
2013-12-19 14:44:33 INFO [cinder.service] Starting 1 workers
2013-12-19 14:44:33 INFO [cinder.service] Started child 2086
2013-12-19 14:44:33 AUDIT [cinder.service] Starting cinder-volume node (version 2013.1.3)
2013-12-19 14:44:33 ERROR [cinder.service] Unhandled exception
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/cinder/service.py", line 227, in _start_child
self._child_process(wrap.server)
File "/usr/lib/python2.7/dist-packages/cinder/service.py", line 204, in _child_process
launcher.run_server(server)
File "/usr/lib/python2.7/dist-packages/cinder/service.py", line 95, in run_server
server.start()
File "/usr/lib/python2.7/dist-packages/cinder/service.py", line 355, in start
self.manager.init_host()
File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 149, in init_host
self.driver.ensure_export(ctxt, volume)
File "/usr/lib/python2.7/dist-packages/cinder/volume/drivers/lvm.py", line 400, in ensure_export
old_name=old_name)
File "/usr/lib/python2.7/dist-packages/cinder/volume/iscsi.py", line 225, in create_iscsi_target
self._new_target(name, tid, **kwargs)
File "/usr/lib/python2.7/dist-packages/cinder/volume/iscsi.py", line 284, in _new_target
**kwargs)
File "/usr/lib/python2.7/dist-packages/cinder/volume/iscsi.py", line 73, in _run
self._execute(self._cmd, *args, run_as_root=True, **kwargs)
File "/usr/lib/python2.7/dist-packages/cinder/utils.py", line 145, in execute
'to utils.execute: %r') % kwargs)
Error: Got unknown keyword args to utils.execute: {'old_name': None}
错误分析：这是OpenStack Grrizly版本的一个BUG，造成cinder-volumn服务在节点重启后无法正常启动，最新版本已经修订（本环环境的安装时间晚于bug提交时间，居然还是旧的代码，很是奇怪）https://review.openstack.org/#/c/47721/
，自己通过修改源代码进行修改，修改如下：
1、打开文件/usr/lib/python2.7/dist-packages/cinder/volume/iscsi.py
2、在224行下边加一行代码，修改如下：
def create_iscsi_target(self, name, tid, lun, path,
chap_auth=None, **kwargs):
kwargs.pop('old_name', None)
self._new_target(name, tid, **kwargs)
self._new_logicalunit(tid, lun, path, **kwargs)
注：kwargs.pop('old_name', None)为新增加的代码
3、重启cinder-volumn服务
service cinder-volume restart服务正常启动，问题解决。