Hello,
I have checked the log file here is the details, please help what to do 2015-02-23 10:56:55.432 1455 ERROR nova.scheduler.utils [req-438c2a45-5274-4f12-869e-c2da2ff8114c None] [instance: dfaabe5f-31ee-4b41-8daa-7ce27377cd54] Error from last host: SERVER1 (node SERVER1): [u'Traceback (most recent call last):\n', u' File "C:\Program Files (x86)\Cloudbase Solutions\OpenStack\Nova\Python27\lib\site-packages\nova\compute\manager.py", line 2030, in dobuildandruninstance\n filterproperties)\n', u' File "C:\Program Files (x86)\Cloudbase Solutions\OpenStack\Nova\Python27\lib\site-packages\nova\compute\manager.py", line 2161, in buildandruninstance\n instanceuuid=instance.uuid, reason=six.texttype(e))\n', u'RescheduledException: Build of instance dfaabe5f-31ee-4b41-8daa-7ce27377cd54 was re-scheduled: {"error": {"message": "The request you have made requires authentication.", "code": 401, "title": "Unauthorized"}}\n'] 2015-02-23 10:56:55.594 1455 WARNING nova.scheduler.driver [req-438c2a45-5274-4f12-869e-c2da2ff8114c None] [instance: dfaabe5f-31ee-4b41-8daa-7ce27377cd54] NoValidHost exception with message: 'No valid host was found.' 2015-02-23 10:56:55.595 1455 WARNING nova.scheduler.driver [req-438c2a45-5274-4f12-869e-c2da2ff8114c None] [instance: dfaabe5f-31ee-4b41-8daa-7ce27377cd54] Setting instance to ERROR state.
