시스템 에러
Controller
2016-08-23 09:32:58.859 15822 INFO cinder.api.openstack.wsgi [req-db1a150e-005a-4b4c-b5e0-2d142ff6bdcc 522060a1c0c64e24ac152d0d3fb1fc50 5bb4299c4af24482bdac01cefc3ae7a5 - - -] POST http://con-201-54:8776/v2/5bb4299c4af24482bdac01cefc3ae7a5/volumes/8a7a6ff5-6170-4a8d-90ef-a28b6478a697/action
2016-08-23 09:32:58.903 15822 INFO cinder.volume.api [req-db1a150e-005a-4b4c-b5e0-2d142ff6bdcc 522060a1c0c64e24ac152d0d3fb1fc50 5bb4299c4af24482bdac01cefc3ae7a5 - - -] Volume info retrieved successfully.
2016-08-23 09:32:58.919 15822 WARNING py.warnings [req-db1a150e-005a-4b4c-b5e0-2d142ff6bdcc 522060a1c0c64e24ac152d0d3fb1fc50 5bb4299c4af24482bdac01cefc3ae7a5 - - -] /usr/lib/python2.7/dist-packages/pkg_resources/__init__.py:187: RuntimeWarning: You have iterated over the result of pkg_resources.parse_version. This is a legacy behavior which is inconsistent with the new version class introduced in setuptools 8.0. In most cases, conversion to a tuple is unnecessary. For comparison of versions, sort the Version instances directly. If you have another use case requiring the tuple, please file a bug with the setuptools project describing that need.
  stacklevel=1,


Compute
2016-08-23 09:32:58.776 7155 WARNING os_brick.initiator.linuxfc [req-c1d9212f-40c5-411c-818d-b9b011d09b9c 522060a1c0c64e24ac152d0d3fb1fc50 5bb4299c4af24482bdac01cefc3ae7a5 - - -] systool is not installed
2016-08-23 09:32:58.850 7155 WARNING os_brick.initiator.linuxfc [req-c1d9212f-40c5-411c-818d-b9b011d09b9c 522060a1c0c64e24ac152d0d3fb1fc50 5bb4299c4af24482bdac01cefc3ae7a5 - - -] systool is not installed
2016-08-23 09:33:00.153 7155 INFO os_brick.initiator.connector [req-c1d9212f-40c5-411c-818d-b9b011d09b9c 522060a1c0c64e24ac152d0d3fb1fc50 5bb4299c4af24482bdac01cefc3ae7a5 - - -] Multipath discovery for iSCSI not enabled.


ComputeNode 에서 sysfsutils 패키지가 설치안되서 생기는 문제
# apt-get install sysfsutils

참고
http://docs.openstack.org/admin-guide/ts-failed-attach-vol-no-sysfsutils.html